In cooperation with the city of Lawton

Scientific Investigations Report 2012–5026

U.S. Department of the Interior

U.S. Geological Survey

Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

Dam-Breach Analysis and Flood-Inundation Mapping for 

Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

By Samuel H. Rendon, Chad E. Ashworth, and S. Jerrod Smith

In cooperation with the city of Lawton

Scientific Investigations Report 2012–5026

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2012

This and other USGS information products are available at http://store.usgs.gov/ 

U.S. Geological Survey

Box 25286, Denver Federal Center

Denver, CO 80225

To learn about the USGS and its information products visit http://www.usgs.gov/

1-888-ASK-USGS 

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the 

U.S. Government.

Although this report is in the public domain, permission must be secured from the individual copyright owners to 

reproduce any copyrighted materials contained within this report.

Suggested citation:

Rendon, S.H., Ashworth, C.E., and Smith, S.J., 2012, Dam-breach analysis and flood-inundation mapping for Lakes Ellsworth 

and Lawtonka near Lawton, Oklahoma: U.S. Geological Survey Scientific Investigations Report 2012–5026, 56 p.

Contents

Abstract ..........................................................................................................................................................1

Introduction.....................................................................................................................................................1

Purpose and Scope .......................................................................................................................................1

Description of Lakes Ellsworth and Lawtonka..........................................................................................1

Dam-Breach Analysis ...................................................................................................................................3

Model Selection....................................................................................................................................3

Data Inputs for Hydraulic Models......................................................................................................3

Elevation Data...............................................................................................................................3

Topographic and Bathymetric Data..........................................................................................3

Surveying with the Global Positioning System .......................................................................3

Hydraulic Data..............................................................................................................................3

Hydrologic Data............................................................................................................................3

 Model Development ............................................................................................................................3

Cross Sections..............................................................................................................................3

Manning’s Roughness Coefficients ..........................................................................................3

Flow and Boundary Conditions..................................................................................................5

Dam-Breach Parameters ...........................................................................................................5

Calibration and Sensitivity Analysis .........................................................................................5

Flood-Inundation Mapping Using Geographic Information Systems..................................7

Flood-Inundation Mapping...........................................................................................................................7

Sources of Uncertainty in Flood-Inundation Maps..................................................................................7

Topographic Uncertainties..................................................................................................................8

Manning’s n-Value Uncertainties.......................................................................................................8

Model Limitations..................................................................................................................................8

Summary and Conclusions...........................................................................................................................8

References Cited............................................................................................................................................9

ii
iii

 Figures

1. Map showing study area for Lakes Ellsworth and Lawtonka near

Lawton, Oklahoma .................................................................................................................................... 2

2. Map showing collection area of light detection and ranging (lidar) data

from Lakes Ellsworth and Lawtonka near Lawton, Oklahoma,

to U.S. Geological Survey streamflow-gaging station East Cache Creek

near Walters, Okla. (07311000), with merged National Elevation Dataset

and lidar-derived digital elevation model ............................................................................................. 4

3. Graph showing cross section derived with light detection and ranging (lidar)

with and without use of the cross-section-point filter tool in the Hydrologic Engineering

Center’s River Analysis System modeling software ........................................................................... 5

4. Map showing spatial distribution of initial Manning’s roughness coefficients for the study area

for the calibrated models of East Cache and Medicine Creeks between Lakes Ellsworth

and Lawtonka near Lawton, Oklahoma.................................................................................................... 6

Tables

1. Manning’s roughness coefficients (n-values) for the calibrated models of East Cache

and Medicine Creeks between Lakes Ellsworth and Lawtonka

near Lawton, Oklahoma........................................................................................................................... 5

2. Values of Cb offset factor, a function of reservoir volume,

from Von Thun and Gillette (1990) for the calibrated models

of East Cache and Medicine Creeks between Lakes Ellsworth and Lawtonka

near Lawton, Oklahoma........................................................................................................................... 7

 3. Values of dam-breach parameters used for Lakes Ellsworth and Lawtonka Dams

near Lawton, Oklahoma............................................................................................................................. 7

 4. Maximum flood-inundation elevation and time for 75-percent probable

maximum flood and sunny-day dam-breach scenarios for Lakes Ellsworth

and Lawtonka dams near Lawton, Oklahoma.......................................................................................... 7

 5. Peak water-surface elevation and time to peak for the sensitivity analysis

of Manning’s roughness coefficients for the 75-percent probable maximum flood

dam-breach scenarios for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma........................... 8

Appendixes

1. Map extents for figures in appendixes 2–5 for the dam-breach analysis

and flood-inundation mapping for Lakes Ellsworth and Lawtonka near

Lawton, Oklahoma ..................................................................................................................................11

2. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for 

the Hydrologic Engineering Center’s River Analysis System model ..............................................13

3. Inundated areas for dam-breach scenarios for Lake Ellsworth, near

Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s

River Analysis System modeling software .........................................................................................23

4. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma,

for the Hydrologic Engineering Center’s River Analysis System model ........................................33

5. Inundated areas for dam-breach scenarios for Lake Lawtonka, near

Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s

River Analysis System modeling software .........................................................................................45

Conversion Factors and Datums

Inch/Pound to SI

 Multiply By To obtain

Length

inch (in.) 2.54 centimeter (cm)

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

square mile (mi2

) 259.0 hectare (ha)

square mile (mi2

) 2.590 square kilometer (km2) 

Volume

cubic foot (ft3

) 0.02832 cubic meter (m3) 

acre-foot (acre-ft) 1,233 cubic meter (m3

)

acre-foot (acre-ft) 0.001233 cubic hectometer (hm3

) 

Flow rate

cubic foot per second (ft3

/s) 0.02832 cubic meter per second (m3/s)

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88) 

or National Geodetic Vertical Datum of 1929 (NGVD 29).

Horizontal coordinate information (U.S. Survey Feet) is referenced to the North American Datum (NAD 

83).

A U.S. Survey Foot is defined as follows: 1 meter = 39.37 inches. Dividing 39.37 inches by 12 (12 inches 

per foot), the resulting conversion factor is 1 meter = 3.280833333. U.S. Survey Feet (reference www.ngs.

noaa.gov/faq.shtml).

Dam-Breach Analysis and Flood-Inundation Mapping

for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

By Samuel H. Rendon, Chad E. Ashworth, and S. Jerrod Smith

Abstract 

Dams provide beneficial functions such as flood control, 

recreation, and reliable water supplies, but they also entail risk: 

dam breaches and resultant floods can cause substantial property 

damage and loss of life. The State of Oklahoma requires each 

owner of a high-hazard dam, which the Federal Emergency 

Management Agency defines as dams for which failure or 

misoperation probably will cause loss of human life, to develop 

an emergency action plan specific to that dam. Components of 

an emergency action plan are to simulate a flood resulting from 

a possible dam breach and map the resulting downstream floodinundation areas. The resulting flood-inundation maps can provide 

valuable information to city officials, emergency managers, and 

local residents for planning the emergency response if a dam 

breach occurs. 

Accurate topographic data are vital for developing floodinundation maps. This report presents results of a cooperative 

study by the city of Lawton, Oklahoma, and the U.S. Geological 

Survey (USGS) to model dam-breach scenarios at Lakes 

Ellsworth and Lawtonka near Lawton and to map the potential 

flood-inundation areas of such dam breaches. To assist the city 

of Lawton with completion of the emergency action plans for 

Lakes Ellsworth and Lawtonka Dams, the USGS collected light 

detection and ranging (lidar) data that were used to develop a highresolution digital elevation model and a 1-foot contour elevation 

map for the flood plains downstream from Lakes Ellsworth and 

Lawtonka. This digital elevation model and field measurements, 

streamflow-gaging station data (USGS streamflow-gaging station 

07311000, East Cache Creek near Walters, Okla.), and hydraulic 

values were used as inputs for the dynamic (unsteady-flow) 

model, Hydrologic Engineering Center’s River Analysis System 

(HEC-RAS). The modeled flood elevations were exported to a 

geographic information system to produce flood-inundation maps. 

Water-surface profiles were developed for a 75-percent probable 

maximum flood scenario and a sunny-day dam-breach scenario, as 

well as for maximum flood-inundation elevations and flood-wave 

arrival times for selected bridge crossings. Some areas of concern 

near the city of Lawton, if a dam breach occurs at Lakes Ellsworth 

or Lawtonka, include water treatment plants, wastewater treatment 

plants, recreational areas, and community-services offices.

Introduction

Dams have altered the flow of many of the Nation’s rivers 

to meet societal needs such as hydropower, recreation, supply, 

irrigation, and flood control (Collier and others, 1996). Although 

dams provide many benefits, they also entail risk: dam breaches 

have produced catastrophic floods. A dam breach can lead to rapid 

flood inundation downstream, causing fatalities and extensive 

damage to infrastructure and the landscape. Some notable historic 

dam breaches include St. Francis Dam in California, 1928 (Rogers, 

2006); Teton Dam in Idaho, 1976 (Arthur, 1977); and Buffalo 

Creek Dam in West Virginia, 1972 (Davies and others, 1972).

The city of Lawton, Oklahoma, owns and operates two 

reservoirs: Lake Lawtonka on Medicine Creek and Lake Ellsworth 

on East Cache Creek (fig. 1). Lake Lawtonka serves primarily 

as a water-supply reservoir for the city of Lawton. Water is 

pumped directly from Lake Lawtonka to the Medicine Park Water 

Treatment Plant for treatment and distribution to the City of 

Lawton’s water users. Lake Lawtonka is also used for flood control 

and recreation. Lake Ellsworth serves as a secondary water-supply 

reservoir to Lake Lawtonka and is also used for flood control 

and recreation (Oklahoma Water Resources Board, 2005). When 

needed, water is pumped from Lake Ellsworth to Lake Lawtonka 

and then to the Medicine Park Water Treatment Plant for treatment 

and distribution to the City of Lawton’s water users. 

The Oklahoma Water Resources Board inspects more than 

4,600 dams in Oklahoma every 5 years and conducts more 

frequent inspections of high-hazard dams, which the Federal 

Emergency Management Agency (FEMA) defines as dams for 

which failure or misoperation probably will cause loss of human 

life (Federal Emergency Management Agency, 1998). The 

Oklahoma Water Resources Board requires that any entity owning 

a dam classified as high hazard must develop an emergency 

action plan (EAP) (Oklahoma Water Resources Board, 2011), 

one component of which is to map or delineate areas of potential 

flood inundation resulting from a dam breach. Knowledge of the 

flood wave and flood-inundation area caused by a dam breach can 

potentially mitigate loss of life and property damage. 

A flood produced by a dam breach is very different from a 

flood produced by a rainfall event. In a dam-breach scenario, the 

subsequent flood wave develops over a relatively short time and 

flows rapidly through the downstream area as opposed to a rainfall 

event that would propagate more slowly through the downstream 

area. Dam-breach analysis and flood-inundation maps are vital for 

providing data to emergency managers and other decisionmakers 

to better plan for and respond quickly and effectively to flooding. 

A cooperative study by the city of Lawton and the U.S. Geological 

Survey (USGS) was done to simulate dam-breach scenarios at 

Lakes Ellsworth and Lawtonka near Lawton and to map the 

potentially resulting flood-inundation areas.

Development of accurate flood-inundation maps requires 

high-resolution topographic data of known accuracy. More 

accurate topographic data lead to more accurate flood-inundation 

maps (Horritt and Bates, 2001). Field surveying produces the most 

accurate elevation data but can be time consuming and expensive. 

Light detection and ranging (lidar) is an airborne laser-profiling 

system that produces location and elevation data to define the 

surface of the Earth and the heights of aboveground features. 

Lidar can produce a digital elevation model (DEM) with 1-foot (ft) 

contours that can be imported to a geographic information system 

(GIS) in a relatively short amount of time.

Dam-breach flood-inundation maps indicate areas that 

would be flooded as a result of a dam failure. The inundated areas 

depicted on flood-inundation maps are approximate, and accuracy 

of such maps is a function of the accuracy of the topographic data, 

the hydraulic models on which the maps are based, the assumptions 

made about the dam failure mode, and the initial flood wave. For 

this report, lidar data with a vertical accuracy of about 3.3 inches 

(in) were used to develop a 1-ft contour elevation map for the study 

area near the city of Lawton. The Hydrologic Engineering Center’s 

River Analysis System (HEC-RAS) modeling software developed 

by the U.S. Army Corps of Engineers, a standard for dam-breach 

flood-inundation models, was used to perform unsteady-flow 

simulations to model the dynamic nature of the flood wave 

produced by a dam-breach scenario (Hydrologic Engineering 

Center, 2010a). Two models, one each for Lakes Ellsworth and 

Lawtonka, were developed for dam-breach simulations.

Purpose and Scope

The purpose of this report is to document the methods and 

results of hydraulic dam-breach models and to present resulting 

flood-inundation maps for the affected areas downstream from 

Lakes Ellsworth and Lawtonka near Lawton. Results presented in 

this report can be used to assist the city of Lawton in identifying 

and mitigating areas at risk if a dam breach occurs. Results also 

can be used to assist the city of Lawton by providing (1) floodinundation maps, (2) hydraulic models, (3) topographic data for the 

study area, and (4) detailed hydraulic information about reaches 

in the study area. 

Description of Lakes Ellsworth

and Lawtonka

Lake Ellsworth is located 11 miles (mi) northeast of the city 

of Lawton on East Cache Creek (fig. 1). The headwaters for East 

Cache Creek are in the Wichita Mountains in Caddo County, 

Okla. Lake Ellsworth’s normal pool elevation, referenced to the 

National Geodetic Vertical Datum of 1929 (NGVD 29), is 1,232.5 

ft, with maximum pool storage of 1,235 ft; it covers approximately 

5,113 acres with a storage volume of 81,224 acre-ft (Oklahoma 

Water Resources Board, 2005). Lake Lawtonka is located 11 mi 

north of the city of Lawton on Medicine Creek (fig. 1) (Oklahoma 

Water Resources Board, 2006). The headwaters for Medicine 

Creek are in the Wichita Mountains in Caddo County. The normal 

pool elevation is 1,343.35 ft (NGVD 29) with maximum pool 

elevation of 1,345.55 ft; the lake covers approximately 2,375 

acres with a storage volume of 63,000 acre-ft (Oklahoma Water 

Resources Board, 2006). 

Both Lakes Ellsworth and Lawtonka Dams are classified 

as large, high-hazard dams. Lake Ellsworth Dam, constructed 

between 1959 and 1961, with gates added in 1969, is a combination 

earth-fill and concrete dam that is approximately 3,900 ft long 

and 96 ft high (Oklahoma Water Resources Board, 2005). The 

top of the dam is at elevation 1,250 ft (NGVD 29) (Oklahoma 

Water Resources Board, 2005). Lake Lawtonka Dam, completed 

in 1907 and upgraded as recently as 1954, is a combination of 

masonry and concrete material and is approximately 612 ft long 

and 90 ft high (Oklahoma Water Resources Board, 2006). The top 

of the dam is at elevation 1,355 ft (NGVD 29) (Oklahoma Water 

Resources Board, 2006).

The drainage basins for East Cache and Medicine Creeks 

are underlain by multiple geologic formations. The flood plain is 

underlain by thick and highly erodible alluvial clays, sands, and 

silts (Bureau of Reclamation, 1996). The local vegetation can 

be separated into three distinct categories: (1) tall grass prairie, 

(2) mixed grass eroded plains, and (3) flood-plain forest (Bureau of 

Reclamation, 1996).

The modeled reach for Medicine Creek is approximately 68 

river miles long and begins with Lake Lawtonka, runs through the 

town of Medicine Park, Okla., and then Fort Sill U.S. Army Base 

(see fig. 1–1 in app. 1), joins with East Cache Creek north of the 

city of Lawton, and then follows East Cache Creek to the town of 

Walters, Okla. The modeled reach of East Cache Creek is 75 river 

miles long and begins with Lake Ellsworth, runs through portions 

of Fort Sill U.S. Army Base and through the city of Lawton, and 

terminates at the town of Walters.
2 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

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Medicine Creek

COMANCHE

COTTON

CADDO

Lawton

Walters

Medicine Park

Geronimo

07311000

07309500

07308990

Lake Ellsworth

Lake Lawtonka

East Cache Creek

98°18'0"W

98°24'0"W

98°30'0"W

34°48'0"N 34°40'0"N 34°32'0"N 34°24'0"N

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

EXPLANATION

Lake

Lakes Ellsworth and Lawtonka model study area

Incorporated area

East Cache drainage basin

County boundary

Stream

Interstate highway

State highway

U.S. highway

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Medicine Park Water Treatment Plant

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photograph from National Agriculture Imagery Program, 2010

Highways from University of Oklahoma Center for Spatial Analysis

Figure 1. Study area for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.

Wichita Mountains

U.S. Army

Fort Sill

N

Figure 1. Study area for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.
Dam-Breach Analysis 3

Dam-Breach Analysis

Previously collected data used for this analysis included 

streamflow data from USGS streamflow-gaging station East Cache 

Creek near Walters, Okla. (07311000); lake-gage data from station 

Lake Ellsworth near Elgin, Okla. (07308990); lake-gage data 

from station Lake Lawtonka near Lawton, Okla. (07309500); and 

bathymetric surveys of Lakes Ellsworth and Lawtonka (Oklahoma 

Water Resources Board, 2005, 2006). New data used for this 

analysis included aerial lidar data, surveying data, and hydraulic 

and hydrologic measurements. 

Model Selection

Version 4.1 of the one-dimensional dynamic (unsteady-flow) 

modeling software HEC-RAS was used to simulate flow in the 

study area (Hydrologic Engineering Center, 2010a). HEC-RAS 

can perform one-dimensional river analysis, in which the watersurface elevation is assumed to be constant over each computational 

section, in one of four modes: (1) steady-flow water-surface 

profile computations, (2) unsteady-flow water-surface profile 

computations, (3) sediment-transport computations, and (4) waterquality analysis. Given the dynamic nature of the flood wave 

produced by a dam breach, as well as the size and geometry of 

the reservoirs in question, the unsteady-flow water-surface profile 

computation component was used for both dam-breach scenarios. 

Unsteady-flow HEC-RAS is capable of simulating subcritical 

as well as supercritical flows, both of which were produced in 

the simulations. For most of the modeled reaches, the flow was 

subcritical, with the velocity of flow being slower than the speed 

that a wave would propagate; however, supercritical flow, flow with 

velocity faster than the wave propagation speed, was likely to occur 

near the location of the dam breach in both models.

Data Inputs for Hydraulic Models

Elevation Data

Development of accurate hydraulic models requires accurate 

topographic data. Accurate land-surface elevation data determine 

the topography that defines the hydraulic conditions from which the 

model computes flood elevations. 

Topographic and Bathymetric Data

A high-resolution digital elevation model (DEM) was 

developed from lidar data for a 1-mi buffer area around East Cache 

Creek and Medicine Creek, from Lakes Ellsworth and Lawtonka to 

USGS streamflow-gaging station East Cache Creek near Walters, 

Okla. (07311000) (fig. 2). The lidar data collection area covered 

approximately 100 square miles near the city of Lawton. Lidar 

elevation data were collected at an average of 2.3 ft point spacing 

or finer and a vertical accuracy of 0.3 ft root mean squared error 

(RMSE) at the 95 percent confidence level for bare, flat ground. 

The lidar data were collected in December 2010 during leaf-off, 

snow-free conditions, when water levels in streams were below 

bank-full stage (Williams, 2010). 

Lidar elevation data were postprocessed to produce a “bareearth” model that was suitable for the production of a DEM with 

1-ft contours that met or exceeded National Digital Elevation 

Program (2004) standards. Lidar elevation data were in Oklahoma 

State Plane Projection, with horizontal units of U.S. Survey Feet 

referenced to the North American Datum of 1983 (NAD 83) 

and with two-decimal-point vertical precision referenced to the 

North American Vertical Datum of 1988 (NAVD 88) (GEOID03 

model), with orthometric heights given in U.S. Survey Feet 

(Williams, 2011). 

Hydroflattened break lines, which are used to characterize the 

locations of streams and other major topographic or hydrologic 

features, were produced along stream edges and water bodies to 

augment the terrain dataset for generation of 1-ft contours and for 

water-point classification. The 1-ft contours were generated from 

the bare-earth lidar model and the collected hydroflattened break 

lines and were then compiled into a shapefile for use in ArcMapTM 

(Environmental Systems Research Institute, 2011).

The lidar data were tested for both vertical and horizontal 

accuracy as described in National Digital Elevation Program 

(2004). The accuracy testing included obtaining at least 40 groundcontrol survey points randomly selected throughout the study 

area for quality-control purposes. These areas were characterized 

by (1) bare-ground, (2) low-vegetation, and (3) high-vegetation 

conditions. The final RMSE of the lidar data was 3.31 in. (Williams, 

2011).

Topographic data were input into HEC-GeoRAS (Hydrologic 

Engineering Center, 2011), a toolbox for ArcGISTM (Environmental 

Systems Research Institute, 2011), to determine elevation points 

in each cross section (appendixes 1–5; see Model Development 

section of this report). Lidar-derived DEM tiles were merged to 

create a continuous DEM, which was buffered in a GIS by an 

additional 2,000 ft (fig. 2). The National Elevation Dataset (NED) 

DEM for the buffered area (U.S. Geological Survey, 2011) was 

reprojected and resampled from a grid size of 10 m to a grid size of 

2 ft and merged with the lidar-derived DEM to extend topographic 

coverage beyond the area of the lidar survey. Bathymetric data for 

Lakes Ellsworth and Lawtonka (Oklahoma Water Resources Board, 

2005, 2006) were merged with the lidar data to generate a complete 

topographic/bathymetric representation of the East Cache Creek 

watershed.

Surveying with the Global Positioning System

Additional topographic data were collected by use of a 

U.S. Survey-grade real-time kinematic Global Positioning System 

(RTK-GPS) receiver. A Trimble R8 Global Navigation Satellite 

System (GNSS) receiver was used, providing an accuracy of 

0.4 in. horizontally and 0.8 in. vertically (Trimble Navigation 

Limited, 2003). 

Additional survey data were collected to define features in the 

study area and for quality-control purposes. Survey data were used 

to help define the tops of roads, as well as the streambed as lidar 

does not measure through water. Topographic data were collected 

at several points in the lidar survey area along East Cache and 

Medicine Creeks for quality-control purposes. Elevations were 

measured at nearby high-accuracy reference network (HARN) 

markers to ensure a set of constant points for geodetic control.

The RTK-GPS data were collected by using the GEOID03 

model and were postprocessed by using the Trimble Geomatics 

Office software (Trimble Navigation Limited, 2005). The survey 

data were referenced to the National Geodetic Survey’s network 

of Continuously Operating Reference Stations (CORS) network 

(National Geodetic Survey, 2011).

Hydraulic Data

Bridges and channel roughness have substantial effects 

on the hydraulic properties of streams. Roughness coefficients 

were determined throughout the study area by using Manning’s 

roughness coefficient, a value used to describe a channel roughness 

or resistance to flow (Arcement and Schneider, 1989). Bridge 

dimensions including width, length, pier diameter, pier location, 

bridge surface to low chord (which is the lowest point of the bridge 

deck), and bridge surface to land surface were measured at all 

locations in the study area by using an engineer’s steel tape. Digital 

photographs were taken at each bridge site in multiple directions 

to document conditions and to provide a check for cross sections 

in the model.

Hydrologic Data

Two scenarios were required for each dam-breach simulation: 

(1) a dam breach during 75 percent of the probable maximum flood 

(PMF) and (2) a dam breach during normal flow conditions without 

precipitation (sunny-day dam breach). Both of those scenarios 

have been established by the Oklahoma Water Resources Board as 

requirements for dam-breach studies (Oklahoma Water Resources 

Board, 2011).

Streamflow and water-level data from USGS streamflowgaging station East Cache Creek near Walters, Okla. (07311000), 

were used as hydrologic inputs for the HEC-RAS model to help 

quantify the sunny-day dam-breach scenario. East Cache Creek 

near Walters, Okla. (07311000), is a real-time USGS streamflowgaging station with a water-stage recorder. The datum of the gage is 

938.2 ft (NGVD 29) (U.S. Geological Survey, 2010). The periods 

of record for this streamflow-gaging station are May 1938 to 

December 1963 and October 1969 to the present (2011). Prior to 

October 1969, data from the East Cache Creek near Walters, Okla. 

(07311000), streamflow-gaging station were published as being 

from Cache Creek near Walters, Okla. (07311000) (U.S. Geological 

Survey, 2010). Previous studies such as Bureau of Reclamation 

(1996) and CH2MHill (2000) were used to quantify the PMF flow 

rates for both lakes. It was assumed that there were no local inflows 

from tributaries to either East Cache Creek or Medicine Creek for 

both the 75-percent-PMF and sunny-day dam-breach scenarios.

 Model Development

Development of an unsteady-flow HEC-RAS model requires 

six major types of data: topographic data, cross-section data, 

Manning’s roughness coefficient n-values, bridge geometry, and 

flow and boundary conditions. These datasets were derived from 

existing data by using HEC-GeoRAS (Hydraulic Engineering 

Center, 2011) and data from previous hydraulic and hydrologic 

studies and field surveys.

Cross Sections

HEC-RAS requires cross sections for water-surface 

computations. Cross sections are drawn perpendicular to 

streamflow. Approximately 300 cross sections were delineated 

manually for each model by using HEC-GeoRAS at about 

1,000-ft intervals (appendixes 1–5). Elevation data then were 

extracted from the merged lidar/NED DEM and imported into 

HEC-RAS. Each cross section ideally is perpendicular to flow, can 

intersect the main channel only once, and may not intersect another 

cross section (Hydrologic Engineering Center, 2010b); however, 

keeping the cross sections perfectly perpendicular to flow was not 

possible at some locations. 

The lidar/NED-derived cross sections were used to create 

approximately 20 additional interpolated cross sections for both 

the East Cache and Medicine Creeks models. Interpolated cross 

sections were inserted in areas that had major changes in crosssection hydraulics. HEC-RAS can manage only 500 elevation 

points per cross section; thus, the cross-section-points filter tool 

of HEC-RAS was used to resample both the lidar-derived and 

the interpolated cross sections down to 490 points. As shown in 

figure 3, use of the cross-section-points filter tool preserves the 

general shape of the cross section as it filtered the number of points 

down to 490 elevation points. A 10-elevation-point buffer was used 

to account for ineffective flow areas and any levees defined in the 

model that might be added later after the cross-section-points filter 

tool was used.

Manning’s Roughness Coefficients

In HEC-RAS, Manning’s roughness coefficient (n, which is 

a corollary to the friction created by the roughness of the channel) 

values can be varied horizontally across any given cross section. 

Manning’s roughness coefficient values were determined by 

techniques described by Barnes (1967), Arcement and Schneider 

(1989), Bureau of Reclamation (1996), and Coon (1998). Derived 

Manning’s roughness coefficient values were determined by the 

following techniques: (1) the 2001 National Land Cover Dataset 

(NLCD; Multi-Resolution Land Characteristics Consortium, 2008) 

was retrieved for the study area, and (2) because HEC-RAS can 

handle only 20 different n values per cross section, the downloaded 

land-use/land-cover data were reclassified into five roughness 

classes each with their own individual n value. The land-use/

land-cover data with the five simplified roughness classes and the 

respective n values for the calibrated models are listed in table 1. 
4 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

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Medicine Creek

COMANCHE

COTTON

CADDO

Lawton

Walters

Medicine Park

Geronimo

07311000

07309500

07308990

Lake Ellsworth

Lake Lawtonka

East Cache Creek

98°18'0"W

98°24'0"W

98°30'0"W

34°48'0"N 34°40'0"N 34°32'0"N 34°24'0"N

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

EXPLANATION

Lake

Lidar DEM extent

NED DEM extent

Incorporated area

East Cache drainage basin

County boundary

Railroad

Stream

Interstate highway

State highway

U.S. highway

Airport

# U.S. Geological Survey 

streamflow-gaging station

0# U.S. Geological Survey

lake-stage station

Wichita Mountains

N

Medicine Park Water Treatment Plant

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photograph from National Agriculture Imagery Program, 2010

Highways from University of Oklahoma Center for Spatial Analysis

Figure 2. Collection area of light detection and ranging (lidar) data from Lakes Ellsworth and Lawtonka near Lawton, Oklahoma, to U.S. Geological Survey streamflow-gaging station “East Cache Creek near Walters, OK” (07311000), with merged

 National Elevation Dataset (NED) and lidar derived digital elevation model (DEM).

Figure 2. Collection area of light detection and ranging (lidar) data from Lakes Ellsworth and Lawtonka near Lawton, Oklahoma, to U.S. Geological Survey streamflow-gaging station East Cache Creek near Walters, Okla. (07311000), with merged National Elevation Dataset (NED) and

lidar-derived digital elevation model (DEM).
Dam-Breach Analysis 5

1,030

1,020

1,010

1,000

990

980

970

0 1,000 2,000 3,000 4,000

Distance, in feet

5,000 6,000 7,000 8,000

Elevation, in feet

Lidar-derived cross-section without use of point filter

Lidar-derived cross-section with use of point filter

The average channel n values were 0.047 for both models, and 

the average overland n values were 0.083 and 0.081 for the East 

Cache and Medicine Creek basins, respectively. These calibrated 

values are very similar to those described in Bureau of Reclamation 

(1996). The spatial distribution of Manning’s roughness coefficients 

for the study area is shown in figure 4.

Flow and Boundary Conditions

Initial flow values, input hydrographs, and downstream 

boundary conditions must be set in a HEC-RAS model. For this 

report, the initial flow was set at 200 cubic feet per second (ft3

/s), 

which is less than the 2-year peak flow and approximately the 

20 percent probability of flow exceedance recorded at the USGS 

streamflow-gaging station East Cache Creek near Walters, Okla. 

(07311000) (Lewis and Esralew, 2009). The 200-ft3

/s initial flow 

value also was used as the flow-rate input for the sunny-day dambreach scenario. The input hydrograph for the 75-percent PMF 

for each of the individual models was obtained from previous 

reports such as Bureau of Reclamation (1996) and CH2MHILL 

(2000) for East Cache and Medicine Creeks. The downstream 

boundary condition was set as normal depth with a friction 

slope of 0.0006, which is equal to the average slope of both East 

Cache and Medicine Creeks. 

Dam-Breach Parameters

An estimate of the dam-breach bottom width and time of full 

failure for use in the Lake Ellsworth and Lake Lawtonka models 

was obtained by using three different dam-breach-sizing equations: 

Bureau of Reclamation (1988):

 (1)

where

B is the average dam-breach-bottom width, in meters; and

hw is the volume of water above the dam-breach invert at 

time of failure, in cubic meters;

Von Thun and Gillette (1990):

 (2)

where

B is the average dam-breach-bottom width, in meters;

hw is the volume of water above the dam-breach invert at 

time of failure, in cubic meters; and

Cb is an offset factor that is a function of reservoir volume 

(table 2); and

Froehlich (1995):

 (3)

where

B is the average dam-breach-bottom width, in meters;

K is an overtopping multiplier with 1.4 being used for 

overtopping and 1.0 being used for a piping failure;

B h = w 3

B h = + 2 5. w b C

B KV h = w b 0 1803 0 32 0 19 . . .

Vw is the volume of water above the dam-breach invert at 

time of failure, in cubic meters; and

hb is the height of the dam breach, in meters.

Values of Cb offset factor, a function of reservoir volume, 

from Von Thun and Gillette (1990) for the calibrated models of 

East Cache and Medicine Creeks between Lakes Ellsworth and 

Lawtonka near Lawton, Oklahoma.

For each of those dam-breach-width determination equations 

there is a corresponding time of failure equation:

Bureau of Reclamation (1988):

 (4)

where

t is the time to full failure, in hours; and

B is the average dam-breach-bottom width, in meters;

Von Thun and Gillette (1990):

For highly erodible dams (5)

For erosion-resistant dams (6)

where

t is the time to full failure, in hours;

B is the average dam-breach-bottom width, in meters; and

hw is the volume of water above the dam-breach invert at 

time of failure, in cubic meters; and

Froehlich (1995):

 (7)

where

t is the time to full failure, in hours;

K is an overtopping multiplier where 1.4 is used for 

overtopping and 1.0 is used for a piping failure;

Vw is the volume of water stored above the dam-breach 

invert at time of failure, in cubic meters; and

hb is the height of the dam breach, in meters.

A summary of the resultant dam-breach parameters for each of 

these respective equations is listed in table 3, in which the resultant 

parameters were converted from Systeme International (SI) units to 

inch/pound units for use in the models. Each set of resultant dambreach parameters was evaluated at the dam-breach location for 

the resulting flow hydrograph, with an average of the dam-breach 

parameters for each of the dams yielding a conservative estimate of 

the dam breach.

Calibration and Sensitivity Analysis

Each model was calibrated by using available data from USGS 

streamflow-gaging station East Cache Creek near Walters, Okla. 

(07311000). Steady-state simulations were run at the 2-, 5-, 10-, 

25-, 50-, 100-, and 500-year recurrence intervals and then were 

compared to measured stage-discharge relations at the streamflowgaging station. Manning’s roughness coefficients were then adjusted 

t B = 0 011.

t B h = +w / (4 61)

t KV h = w b

- 0 00254 0 53 0 9 . . .

Table 1. Manning’s roughness coefficients (n-values) for the calibrated models of East Cache and Medicine Creeks between Lakes Ellsworth and 

Lawtonka near Lawton, Oklahoma.

Land-use code Name Land-use class Calibrated Manning's

roughness coefficent

Initial Manning's

roughness coefficent

11 Open water 1 0.045 0.042

21 Developed, open space 2 .075 .035

22 Developed, low intensity 3 .225 .1

23 Developed, medium intensity 3 .225 .1

24 Developed, high intensity 3 .225 .1

31 Barren land 4 .0825 .04

41 Deciduous forest 5 .3 .15

42 Evergreen forest 5 .3 .15

52 Shrub/scrub 5 .3 .15

71 Grassland 4 .0825 .04

81 Pasture 4 .0825 .04

82 Cultivated crop land 4 .0825 .04

95 Wetland 5 .3 .15

t B h = w / ( )4

Figure 3. Cross section derived with light detection and ranging (lidar) with and without use of the cross-section-point filter tool in the Hydrologic 

Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
6 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

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UV58

UV65

UV36

UV7

UV5

UV53

UV17

UV49

UV281A

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£¤62

£¤281B

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Medicine Creek

COMANCHE

COTTON

CADDO

Lawton

Walters

Medicine Park

Geronimo

07311000

07309500

07308990

Lake Ellsworth

Lake Lawtonka

East Cache Creek

98°18'0"W

98°24'0"W

98°30'0"W

34°48'0"N 34°40'0"N 34°32'0"N 34°24'0"N

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

EXPLANATION

Lake

Lakes Ellsworth and Lawtonka model study area

Incorporated area

East Cache drainage basin

Land Cover, 2001, and related Manning’s roughness

coefficient (n)

Water (n = 0.042)

Developed, open space (n = 0.035)

Developed (n = 0.1)

Crop/pasture/grassland (n = 0.04)

Forest/shrub/wetland (n = 0.15)

County boundary

Stream

Interstate highway

State highway

U.S. highway

# U.S. Geological Survey

streamflow-gaging station

0# U.S. Geological Survey

lake-stage station

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Land cover modified from 2001 National Land Cover Dataset

Highways from University of Oklahoma Center for Spatial Analysis

Figure 4. Spatial distribution of initial Manning’s roughness coefficients for the study area for the calibrated models of East Cache and Medicine Creeks between Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.

Wichita Mountains

N

Medicine Park Water Treatment Plant

Figure 4. Spatial distribution of initial Manning’s roughness coefficients for the study area for the calibrated models of East Cache and Medicine Creeks between Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.
Sources of Uncertainty in Flood-Inundation Maps 7

(table 1) until there was agreement between the measured stagedischarge relations and the calibrated model.

A sensitivity analysis was performed on the different dambreach parameters, as described in the Dam-Breach Parameters 

section of this report, as well as on the Manning’s roughness 

coefficients. Because of the topography of this area, large flat 

cross sections with relatively steep sides, percent change in total 

inundated area was not used as the determinant in the Manning’s 

sensitivity analysis. For example, the percent difference in floodinundated area between the 75-percent-PMF dam-breach scenario 

and the sunny-day dam-breach scenario is less than 12 percent for 

the East Cache Creek Basin and 7 percent for the Medicine Creek 

Basin. For the Manning’s sensitivity analysis, the time to peak and 

peak stage at each of the bridges were determined. 

Flood-Inundation Mapping Using Geographic 

Information Systems

Flood-inundation maps were generated by using HECGeoRAS (Hydrologic Engineering Center, 2011). After each of 

the models was calibrated and run, the results were exported by 

using an extensible markup language (XML) script and were 

subsequently imported into ArcMap. Lidar-derived cross sections 

were used to generate the flood-inundation maps. All maps were 

inspected for outlying values and consistency. Areas where other 

major tributaries flow into East Cache and Medicine Creeks were 

adjusted to account for backwater to the confluences to match the 

topographic contour lines equal to the water-surface elevation at the 

cross section nearest to each confluence.

Flood-Inundation Mapping

Water-surface profiles for the 75-percent-PMF and sunny-day 

dam-breach scenarios were developed for both models. Because of 

the size of the study area, the maps of total flood-inundation areas 

were subdivided into tiles at a 1:20,000 scale. Maximum floodinundation elevations and times for each bridge for the 75-percentPMF and sunny-day dam-breach scenarios are listed in table 4. 

For the 75-percent-PMF dam-breach scenario, all bridges in both 

models were inundated.

Areas such as community-services offices, public works 

facilities, and parks were located by using shapefiles produced by 

the city of Lawton (M., Jones, written commun., 2011) and aerial 

photography (National Agriculture Imagery Program, 2010) that 

were plotted on the associated flood-inundation maps. These areas 

were grouped into four classifications of areas of concern: water 

treatment plants, wastewater treatment plants, recreational areas, 

and community-services offices. Each mapped tile of the cross 

sections and inundated areas are presented in appendixes 1–5.

Sources of Uncertainty 

in Flood-Inundation Maps

Flood-inundation maps are used to depict areas that may be 

inundated by water during a dam breach. The uncertainty associated 

with these maps, which is difficult to measure, may be introduced 

by errors in topographic or hydraulic data or in the modeling system 

used to create the flood-inundation map. Data necessary to quantify 

these errors are seldom available; thus, stringent quality-assurance 

methods are vital for hydraulic modeling. The methods, procedures, 

and assumptions used to map the potentially flooded areas, limits 

of flooding, and flood-wave traveltimes are approximate and should 

be used as only guidelines for management decisions. Actual areas 

inundated will depend on the actual failure mechanism during 

flood conditions and may differ from the areas shown on the maps 

(Federal Energy Regulatory Commission, 2007).

Table 2. Values of Cb offset factor, a function of reservoir volume,

from Von Thun and Gillette (1990) for the calibrated models

of East Cache and Medicine Creeks between Lakes Ellsworth and 

Lawtonka near Lawton, Oklahoma.

Size of reservoir, in cubic meters Cb, in meters

<1.23*106 6.1

1.23*106-6.17*106 18.3

6.17*106-1.23*107 42.7

>1.23*107 54.9

Table 3. Values of dam-breach parameters used for Lakes Ellsworth 

and Lawtonka Dams near Lawton, Oklahoma.

Parameter

estimation equation

Dam-breachbottom width,

in feet

Time to full failure,

in hours

Lake Ellsworth Dam

Bureau of Reclamation (1998) 300 3.3

Von Thun and Gillette (1990) 430 2.4

Froehlich (1995) 577 2.3

Average 436 2.7

Lake Lawtonka Dam

Bureau of Reclamation (1998) 300 3.3

Von Thun and Gillette (1990) 430 1.8

Froehlich (1995) 510 2.3

Average 413.5 2.5

Table 4. Maximum flood-inundation elevation and time for 75-percent probable maximum flood (PMF) and sunny-day dam-breach scenarios for 

Lakes Ellsworth and Lawtonka dams near Lawton, Oklahoma.

[ID, identifier; hh:mm, hours and minutes]

Bridge name Cross section ID1 75-percent PMF stage, 

in feet

75-percent PMF stage, 

in hh:mm

Sunny-day stage,

in feet

Sunny-day stage,

in hh:mm

Lake Ellsworth on East Cache Creek

Highway 277 348313.5 1,201.90 02:55 1,192.48 03:45

Glover Road 338271.3 1,188.29 03:10 1,181.08 04:10

Interstate 44 310843.5 1,161.74 03:35 1,153.57 05:30

Lake Road 306638 1,150.29 04:10 1,144.21 06:05

Qinette Road 281490.8 1,137.71 05:00 1,130.26 07:55

Hoyle Road 271344.3 1,128.67 05:30 1,121.26 09:05

Rogers Road 249251 1,106.21 06:20 1,099.52 10:35

Gore Road 228809.9 1,092.75 06:50 1,088.19 11:55

Lee Boulevard 223404.4 1,082.19 07:10 1,079.11 12:05

Bishop Road 215171.8 1,072.17 07:35 1,066.99 12:50

Coombs Road 207588.3 1,065.05 08:00 1,059.70 13:35

Tinney Road 177428.1 1,047.95 09:20 1,042.24 16:00

County Road 1750 131670 1,027.87 10:45 1,021.70 18:55

County Road 1770 98970.55 1,016.12 11:40 1,008.84 20:50

County Road 2620 41468.84 991.44 14:15 984.25 25:25

Highway 53 15497.69 981.23 15:10 973.15 28:30

Lake Lawtonka on Medicine Creek

Medicine Foot Bridge 335375.5 1,303.48 02:21 1,297.96 02:24

Medicine Wooden Bridge 334434.3 1,295.82 02:25 1,291.18 02:28

Highway 49 332508.8 1,289.30 02:36 1,284.66 02:38

White Wolf Road 286100 1,152.90 06:47 1,147.57 08:16

Medicine Quinette Road 281821.7 1,131.28 07:25 1,129.16 07:58

Interstate 44 277190.6 1,126.71 08:09 1,124.46 08:48

Railroad Bridge 277023.4 1,126.18 08:16 1,123.85 08:58

Hoyle Road 271344.3 1,122.61 08:44 1,120.42 09:42

Rogers Road 249251 1,102.28 09:46 1,099.45 01:02

Gore Road 228809.9 1,090.19 10:31 1,087.96 12:28

Lee Boulevard 223404.4 1,080.33 10:49 1,079.08 12:38

Bishop Road 215168.16 1,069.06 11:22 1,066.75 13:27

Coombs Road 207587.88 1,061.83 11:57 1,059.37 14:11

Tinney Road 177428.1 1,044.29 13:56 1,041.74 16:34

County Road 1750 131670 1,023.80 16:13 1,020.95 19:39

County Road 1770 98970.55 1,011.23 17:41 1,007.81 21:39

County Road 2620 41468.84 986.02 21:17 983.16 25:53

Highway 53 15497.69 975.41 23:21 971.74 29:32 1

Bridges are not identified by cross section ID, but the equivalent cross section ID is shown.
8 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

Topographic Uncertainties

Elevation data composed the primary dataset for creating 

water-surface and shoreline maps. The elevation data for this study 

were obtained by using lidar techniques. Because of the flat terrain 

in the downstream sections of the study area, relatively large errors 

in water-surface extent can occur from a small error in watersurface elevation, as described by a simple calculation: if a river 

reach has a slope of 0.1 percent, a 1-inch difference in elevation can 

yield about an 80-ft difference in horizontal distance of inundated 

area. It is difficult, therefore, to determine the extents of flooding 

with a high degree of accuracy (Bales and Wagner, 2009). 

Manning’s n-Value Uncertainties

Manning’s roughness coefficients can affect not only the 

extent of a flood-inundation area but also the timing of a flood 

peak. Although the Manning’s roughness coefficients used in this 

study were supported by previously calibrated models, changes 

in the flood-plain hydraulics over time may decrease accuracy. A 

sensitivity analysis was conducted for the PMF scenarios of each 

of the models. In this sensitivity analysis the Manning’s roughness 

coefficient n-values were tested at 0.9 and 1.1 times the modeled 

values. These changes in the Manning’s roughness coefficient 

n-values produced very little change in total inundated area but did 

result in changes in the peak water-surface elevations up to about 

4 ft different from the calibrated PMF scenario and changes in the 

timing of flood peaks of up to approximately 1.25 hours. Table 5

shows the peak water-surface elevation at each of the bridges, as 

well as the time to peak, for the PMF sensitivity models.

Model Limitations

 The major data inputs for the HEC-RAS model are 

topographic data, Manning’s roughness coefficient n-values, bridge 

geometry data, and initial flow and boundary conditions. Errors 

can be associated with each of those data types. The major cause 

of uncertainty in this model, however, is the one-dimensional 

assumption that the hydraulic variables such as water-surface 

elevation are constant across each computational node (cross 

section). In an extremely flat flood plain such as this study area, 

the one-dimensional assumption may not be valid. For example, 

although the flow in the main stream in question may be at a 

certain elevation, other streams that are intersected by the given 

cross section may not be at the same water-surface elevation. 

Two-dimensional models can be used to account for this type 

of error. Horritt and Bates (2001) demonstrated that increased 

lateral resolution of a two-dimensional model allows for a better 

simulation of the water storage in a flood plain. 

Summary and Conclusions

This report presents results of a cooperative study by the city 

of Lawton, Oklahoma, and the U.S. Geological Survey (USGS) 

to model dam-breach scenarios at Lakes Ellsworth and Lawtonka, 

near Lawton, and to map the potentially resulting flood-inundation 

areas. Lake Ellsworth, constructed between 1959 and 1961, 

provides secondary water storage for the city of Lawton, as well 

as for flood control and recreation. Lake Lawtonka, constructed in 

1907, serves as the primary water storage for the city of Lawton. 

The Lake Ellsworth Dam and Lake Lawtonka Dam are classified 

by the State of Oklahoma as a high-hazard dams and therefore need 

to have flood-inundation maps modeled as part of the emergency 

action plans required by the Oklahoma Water Resources Board.

For this report, flood profiles for a 75-percent probable 

maximum flood (PMF) dam breach and a sunny-day dam breach 

were computed for the stream reach downstream from the Lake 

Ellsworth Dam and the Lake Lawtonka Dam by means of a 

one-dimensional dynamic (unsteady-flow) model using the U.S. 

Army Corps of Engineers Hydrologic Engineering Center’s River 

Analysis System (HEC-RAS) software. Development of accurate 

hydraulic models requires accurate land-surface elevation data. 

Light detection and ranging (lidar) data were used to develop 

a high-resolution digital elevation model and a 1-foot contour 

elevation map for the flood plain below Lakes Ellsworth and 

Lawtonka. Additional topographic data were collected by use of a 

U.S. Survey-grade real-time kinematic Global Positioning System 

receiver. Field measurements of bridge dimensions were determined 

at all locations in the study area. Streamflows and water-level data 

from a USGS streamflow-gaging station, East Cache Creek near 

Walters, Okla. (07311000), were used as hydrologic inputs for the 

model to help quantify the sunny-day dam-breach scenario. 

The resulting flood-inundation maps were generated 

by HEC-GeoRAS (a tool box for ArcGISTM [Environmental 

Systems Research Institute, Inc.]) and imported into a geographic 

information system to delineate areas flooded in each flood 

scenario. Some areas of concern near the city of Lawton, if a dam 

breach occurs at the Lake Ellsworth Dam or the Lake Lawtonka 

Dam, included water treatment plants, wastewater treatment plants, 

recreational areas, and community-services offices.

Uncertainty may be introduced into flood-inundation maps 

with regards to the accuracy of the topographic, hydraulic, 

and hydrologic data and the modeling system used. Even 

with uncertainties, the produced dam-breach models and 

flood-inundation maps can provide city managers, emergency 

management personnel, and residents in the East Cache River Basin 

with vital information for flood-response activities if a dam breach 

occurs at the Lake Ellsworth Dam or the Lake Lawtonka Dam.

 Table 5. Peak water-surface elevation and time to peak for the sensitivity analysis of Manning’s roughness coefficients for the 75-percent 

probable maximum flood (PMF) dam-breach scenarios for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.

[ID, identifier; hh:mm, hours and minutes]

Bridge name Cross

section ID1

PMF stage,

in feet

PMF stage,

in hh:mm

0.9 Manning's 

stage, in feet

0.9 Manning's 

stage, in hh:mm

1.1 Manning's 

stage, in feet

1.1 Manning's 

stage, in hh:mm

Lake Ellsworth on East Cache Creek

Highway 277 348313.5 1,198.12 02:52 1,197.24 02:51 1,198.99 02:53

Glover Road 338271.3 1,184.68 03:00 1,184.04 02:58 1,185.28 03:02

Interstate 44 310843.5 1,164.02 03:10 1,164.41 03:15 1,165.66 03:23

Lake Road 306638 1,146.24 03:46 1,145.57 03:43 1,146.76 03:58

Qinette Road 281490.8 1,134.32 04:23 1,133.84 04:24 1,135.18 04:37

Hoyle Road 271344.3 1,124.51 04:51 1,123.85 04:50 1,124.97 05:04

Rogers Road 249251 1,102.13 05:22 1,106.01 04:56 1,102.60 05:41

Gore Road 228809.9 1,090.93 05:48 1,090.77 05:36 1,091.01 06:09

Lee Boulevard 223404.4 1,080.29 05:58 1,080.18 05:45 1,080.37 06:22

Bishop Road 215171.8 1,068.61 06:13 1,068.14 05:59 1,069.01 06:38

Coombs Road 207588.3 1,061.33 06:29 1,060.85 06:13 1,061.74 06:56

Tinney Road 177428.1 1,043.84 07:26 1,043.20 07:04 1,044.40 07:56

County Road 1750 131670 1,025.09 08:23 1,024.52 07:59 1,025.62 08:57

County Road 1770 98970.55 1,011.74 09:01 1,011.15 08:33 1,012.29 09:37

County Road 2620 41468.84 989.09 10:40 988.46 10:07 989.67 11:20

Highway 53 15497.69 979.97 11:11 979.88 10:37 980.18 11:52

Lake Lawtonka on Medicine Creek

Medicine Foot Bridge 335375.5 1,303.48 02:21 1,301.54 02:23 1,304.88 02:22

Medicine Wooden Bridge 334434.3 1,295.82 02:25 1,294.04 02:24 1,297.44 02:26

Highway 49 332508.8 1,289.30 02:36 1,287.79 02:34 1,290.49 02:36

White Wolf Road 286100 1,152.90 06:47 1,148.70 05:47 1,152.57 07:06

Medicine Quinette Road 281821.7 1,131.28 07:25 1,131.25 06:23 1,131.68 07:49

Interstate 44 277190.6 1,126.71 08:09 1,126.63 07:04 1,127.10 08:35

Railroad Bridge 277023.4 1,126.18 08:16 1,126.11 07:11 1,126.58 08:42

Hoyle Road 271344.3 1,122.61 08:44 1,122.46 07:37 1,123.01 09:12

Rogers Road 249251 1,102.28 09:46 1,102.17 08:34 1,102.64 10:19

Gore Road 228809.9 1,090.19 10:31 1,090.27 09:15 1,090.22 11:10

Lee Boulevard 223404.4 1,080.33 10:49 1,080.38 09:28 1,080.34 11:28

Bishop Road 215168.16 1,069.06 11:22 1,068.87 10:01 1,069.16 12:06

Coombs Road 207587.88 1,061.83 11:57 1,061.64 10:33 1,062.13 12:43

Tinney Road 177428.1 1,044.29 13:56 1,044.00 12:27 1,044.60 14:52

County Road 1750 131670 1,023.80 16:13 1,023.54 14:32 1,024.03 17:23

County Road 1770 98970.55 1,011.23 17:41 1,010.94 15:53 1,011.47 18:59

County Road 2620 41468.84 986.02 21:17 985.79 19:06 986.19 22:55

Highway 53 15497.69 975.41 23:21 975.72 21:10 975.18 25:08

1

Bridges are not identified by cross section ID, but the equivalent cross section ID is shown.
References Cited 

9

Appendixes 1–5

References Cited

Arcement, G.J., and Schneider V.R., 1989, Guide for selecting 

Manning’s roughness coefficients for natural channels and 

flood plains: U.S. Geological Survey Water-Supply Paper 2339 

[variously paged].

Arthur, H.G., 1977, Teton Dam failure. The evaluation of dam safety: 

New York, Engineering Foundation Conference Proceedings, 

American Society of Civil Engineers, p. 61–71.

Bales, J.D., and Wagner, C.R., 2009, Sources of uncertainty in 

flood inundation maps: Journal of Flood Risk Management, v. 2, 

p. 139–147.

Barnes, H.H., 1967, Roughness characteristics of natural channels: U.S. 

Geological Survey Water-Supply Paper 1849 [variously paged].

Bureau of Reclamation, 1988, Downstream hazard classification 

guidelines: Denver Colo., U.S. Department of the Interior, Bureau of 

Reclamation, ACER Technical Memorandum No. 11, 57 p.

Bureau of Reclamation, 1996, Cache Creek Project—Hydraulic analysis 

of Cache and East Cache Creeks using HEC-2: Billings, Mont., Great 

Plains Regional Office, p. 7–8.

CH2MHILL, 2000, Evaluation of alternative gate operations at Lake 

Ellsworth and Lake Lawtonka: City of Lawton, Okla., p. 13–14.

Collier, Michael, Webb, R.H., and Schmidt, J.C., 1996, Dams and 

rivers—Primer on the downstream effects of dams: U.S. Geological 

Survey Circular 1126, 94 p.

Coon, W.F., 1998, Estimation of roughness coefficients of natural stream 

channels with vegetated banks: U.S Geological Survey Water-Supply 

Paper 2441 [variously paged].

Davies, W.E., Bailey, J.F., and Kelly, D.B, 1972, West Virginia’s Buffalo 

Creek flood—A study of the hydrology and engineering geology: 

U.S. Geological Survey Circular 667, 32 p.

Environmental Systems Research Institute, 2011, ArcGIS help: 

Redlands, Calif., accessed April 1, 2011, at http://webhelp.esri.com/

arcgiSDEsktop/9.3/index.cfm?TopicName=welcome.

Federal Emergency Management Agency, 1998, Federal guidelines 

for dam safety: U.S. Department of Homeland Security Federal 

Emergency Management Agency [variously paged].

Federal Energy Regulatory Commission, 2007, Engineering guidelines 

for the evaluation of hydropower projects, emergency action plans: 

accessed April 1, 2011, at http://www.ferc.gov/industries/hydropower/

safety/guidelines/eng-guide/chap6.pdf [variously paged].

Froehlich, D.C., 1995, Embankment dam breach parameters revisited: 

New York, Water Resources Engineering Proceedings, 1995 

American Society of Civil Engineers Conference on Water Resources 

Engineering, p. 887–891.

Horritt, M.S., and Bates, P.D., 2001, Effects of spatial resolution 

on a raster based model of flood flow: Journal of Hydrology, v. 

253, p. 239–249.

Hydrologic Engineering Center, 2010a, HEC-RAS River Analysis 

System user’s manual, version 4.1: Davis, Calif., accessed April 1, 

2011, at http://www.hec.usace.army.mil/software/hec-ras/documents/

HEC-RAS_4.1_Users_Manual.pdf [variously paged].

Hydrologic Engineering Center, 2010b, HEC-RAS River Analysis 

System hydraulic reference manual, version 4.1: Davis, Calif., 

accessed April 1, 2011, at http://www.hec.usace.army.mil/

software/hec-ras/documents/HEC-RAS_4.1_Reference_Manual.

pdf [variously paged].

Hydrologic Engineering Center, 2011, HEC-GeoRAS GIS tools 

for support of HEC-RAS using ArcGIS, version 4.3.93: Davis, 

Calif., accessed April 1, 2011, at http://www.hec.usace.army.mil/

software/hec-ras/documents/HEC-GeoRAS_43_Users_Manual.pdf

[variously paged].

Lewis, J.M., and Esralew, R.A., 2009, Statistical summaries of 

streamflow in and near Oklahoma through 2007: U.S. Geological 

Survey Scientific Investigations Report 2009–5135, p. 456–459.

Multi-Resolution Land Characteristics Consortium, 2008, 2001 National 

Land Cover Database (NLCD), accessed April 1, 2011, at http://www.

epa.gov/mrlc/nlcd-2001.html.

National Agriculture Imagery Program, 2010, NAIP imagery, accessed 

June 1, 2011, at http://www.fsa.usda.gov/FSA/apfoapp?area=home&su

bject=prog&topic=nai.

National Digital Elevation Program, 2004, Guidelines for digital 

elevation data, version 1.0: National Digital Elevation Program 

[variously paged].

National Geodetic Survey, 2011, Continuously Operating Reference 

Station (CORS): National Geodetic Survey, accessed April 1, 2011, at 

http://www.ngs.noaa.gov/CORS/.

Oklahoma Water Resources Board, 2005, Hydrographic survey of 

Ellsworth Lake: Oklahoma Water Resources Board, p. 4–9.

Oklahoma Water Resources Board, 2006, Hydrographic survey of Lake 

Lawtonka: Oklahoma Water Resources Board, p. 4–9.

Oklahoma Water Resources Board, 2011, Hydrologic and hydraulic 

guidelines for dams in Oklahoma: Oklahoma Water Resources 

Board, p. 12–20.

Rogers, D.J., 2006, Lessons learned from the St. Francis Dam failure: 

Geo-Strata, v. 6, issue 2, March/April 2006, p. 14–17.

Trimble Navigation Limited, 2003, Trimble R7/R8 GPS receiver user 

guide, version 1.00, revision A: Sunnyvale, Calif., Trimble Navigation 

Limited, 216 p.

Trimble Navigation Limited, 2005, Trimble Geomatics Office, version 

1.63, build 10: Sunnyvale, Calif., Trimble Navigation Limited 

[variously paged].

U.S. Geological Survey, 2010, USGS water data for the Nation: National 

Water Information System (NWISWeb), accessed June 1, 2011, at 

http://waterdata.usgs.gov/nwis/.

U.S. Geological Survey, 2011, National Elevation Dataset: U.S. 

Geological Survey, accessed on June 1, 2011, at http://ned.usgs.gov/.

Von Thun, J.L., and Gillette, D.R., 1990, Guidance on breach 

parameters: Denver, Colo., Internal Memorandum, U.S. Department 

of the Interior, Bureau of Reclamation, p. 17.

Williams, W., 2010, Project plan Lawton, OK dam breach: Chesterfield, 

Mo., Surdex Corporation, p. 2–9.

Williams, W., 2011, Lidar accuracy report, OK dam breach: 

Chesterfield, Mo., Surdex Corporation, p. 2–4.
10 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

Appendix 1
Appendix 1 11

Lake Ellsworth

Lake Lawtonka

Medicine Park

Geronimo

Walters

Lawton

CADDO COMANCHE

COTTON

£¤277

£¤62

£¤62

£¤277

£¤277

£¤281B

UV5

UV281A

UV36

UV49

UV115

UV17

UV53

UV19

UV5

UV7

UV36

UV65

UV58

UV19

§ ̈¦44

§ ̈¦44

Fig. 2-10

Fig. 3-10

Fig. 2-5

Fig. 3-5 Fig. 2-6

Fig. 3-6

Fig. 2-7

Fig. 3-7

Fig. 2-1

Fig. 3-1

Fig. 2-9

Fig. 3-9

Fig. 2-8

Fig. 3-8

Fig. 2-3

Fig. 3-3

Fig. 2-4

Fig. 3-4

Fig. 2-2

Fig. 3-2

98°18'0"W

98°24'0"W

98°30'0"W

98°36'0"W

34°48'0"N 34°40'0"N 34°32'0"N 34°24'0"N

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Highways from University of Oklahoma Center for Spatial Analysis

EXPLANATION

Lake

Figure extents

Incorporated area

U.S. Army, Fort Sill boundary

East Cache drainage basin

County boundary

Stream

Interstate highway

State highway

U.S. highway

Figure 1-1. Map extents for figures in appendixes 2 and 3.

Figure 1–1. Map extents for figures in appendixes 2 and 3 for the dam-breach analysis and flood-inundation mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.
12 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

Lake Ellsworth

Geronimo

Medicine Park

Walters

Lawton

CADDO COMANCHE

COTTON

£¤277

£¤62

£¤62

£¤277

£¤281B

£¤277

UV5

UV281A

UV49

UV115

UV17

UV53

UV19

UV5

UV7

UV36

UV65

UV58

UV19

§ ̈¦44

§ ̈¦44

Fig. 4-7

Fig. 5-7

Fig. 4-6

Fig. 5-6

Fig. 4-9

Fig. 5-9

Fig. 4-11

Fig. 5-11

Fig. 4-5

Fig. 5-5

Fig. 4-2

Fig. 5-2

Fig. 4-10

Fig. 5-10

Fig. 4-8

Fig. 5-8

Fig. 4-1

Fig. 5-1

Fig. 4-4

Fig. 5-4

Fig. 4-3

Fig. 5-3

98°18'0"W

98°24'0"W

98°30'0"W

98°36'0"W

34°48'0"N 34°40'0"N 34°32'0"N 34°24'0"N

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Highways from University of Oklahoma Center for Spatial Analysis

EXPLANATION

Lake

Figure extents

Incorporated area

U.S. Army, Fort Sill boundary

East Cache drainage basin

County boundary

Stream

Interstate highway

State highway

U.S. highway

Figure 1-2. Map extents for figures in appendixes 4 and 5.

Figure 1–2. Map extents for figures in appendixes 4 and 5 for the dam-breach analysis and flood-inundation mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma.
Appendix 2 Appendix 2 13

#0

1,180

1,160

1,220

1,200

1,240

1,260

1,280

1,300

1,200

1,220

1,240

1,200

1,300

1,260

1,260

1,180

1,180

1,260

1,180

1,240

1,200

1,220

1,260

1,240

1,180

1,240

1,160

1,280

1,200

1,200

1,240

1,220

1,240

1,220

1,180

1,260

1,280

1,160

1,280

1,240

1,180

1,240

1,200

1,200

1,200

1,240

1,220

1,240

1,200

1,260

1,240

1,200

1,280

1,240

1,260

1,260

1,200

1,240

1,260

§ ̈¦44

£¤62

£¤277

Apache

Elgin

Elgin

07308990

US Hwy 62 US Hwy 281

Tony Creek Rd

US Hwy 277

I- 44

E1490 Rd

Dunn Rd

Glover Rd

County Line Rd

NE King Rd

Edgewater Blvd

Lake Rd

NE Watts Rd Cherry Rd

NE Happy Hollow Rd

Hilltop Rd

NW Wolf Rd

Bonnifield Rd

H E Bailey Tpke

Quail Trl

NW North Dr

NW Pine Ave

Happy Hollow

Watts NW Cherry Rd

1st St

Hillside Rd

NE 30th St

Ellsworth Rd

4th St

Meers Porter Hill Rd

Lakeview Ave

Waterfront Dr

Happy Hollow Rd

Fir Ave

NE Tony Creek Dr

Lakeview Rd

NE Fisherman's Cove Dr

Harned Rd

Ash Ave

Pine Ave

Fisherman Dr

Robin Ln

Ellsworth Dr

S Hill Rd

Lakeside Dr Creek Rd

NE Track Rd

Sunvalley Dr

E1490 Rd County Line Rd

NE King Rd NE King Rd

Lake Ellsworth

361,258.4

362,001.4

381,269

376,522

365,126.6

372,322.5

373,969.2

369,969.3

383,545.8

379,415.9

366,726.7

385,606

368,357.7

388,030.4

389,737.7

391,904.8

391,040.1

348,032.6 347,731.3

355,644.2

348,611.9

337,188.5

356,329.6

338,478.9

339,162.1

340,838.7

339,284.4

355,083.9

341,645.1

344,054.2

98°18'45"W

98°19'30"W

98°20'15"W

98°21'0"W

98°21'45"W

98°22'30"W

98°23'15"W

98°24'0"W

34°53'30"N 34°53'0"N 34°52'30"N 34°52'0"N 34°51'30"N 34°51'0"N 34°50'30"N 34°50'0"N 34°49'30"N 34°49'0"N 34°48'30"N 34°48'0"N 34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N

0 0.2 0.6 0.8 1.0 MILE

0 KILOMETER

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

EXPLANATION

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

# U.S. Geological Survey 

streamflow-gaging station

#0 U.S. Geological Survey

lake-stage station

0.4

0.2 0.6 0.8 1.0 0.4

Lawton

Lake Ellsworth Walters

¢

Figure 2-1. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 2–1. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
14 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#0

1,180

1,160

1,200

1,220

1,240

1,260

1,140

1,280

1,300

1,240

1,240

1,180

1,220

1,280

1,220

1,220

1,180

1,220

1,240

1,220

1,260

1,260

1,220

1,280

1,180

1,200

1,180

1,180

1,180

1,220

1,240

1,240

1,180

1,260

1,200

1,240

1,180

1,200

1,240

1,240

1,240

1,300

1,260

1,260

1,220

1,200

1,280

1,200

1,180

1,260

1,260

1,260

1,220

1,240

1,240

1,220

1,280

1,180

1,240

1,220

1,180

1,200

1,200

1,240

1,260

1,200

1,240

1,260

1,180

1,240

1,220

1,280

1,240

1,280

1,280

1,260

1,200

1,200

1,180

1,200

1,220

1,220

1,220

1,160

1,220

1,200

1,180

1,260

1,160

1,200

1,280

1,240

1,220

1,220

1,180

1,200

1,240

1,160

1,200

1,240

1,200

1,280

1,180

1,240

1,240

1,200

1,260

1,180

1,260

1,220

1,240

1,180

1,240

1,240

1,260

1,240

£¤62

£¤277

07308990

US Hwy 62

US Hwy 281

US Hwy 277

Glover Rd

Dunn Rd

Bonnifield Rd

Cherry Rd

Hilltop Rd

1st St

Hillside Rd

NE 30th St

4th St

NE Bonniefield Rd

NW Dolese Rd

Fir Ave

2nd St

Edgewater Blvd

3rd Ave

Oak Ave

Pine Ave

NE Pine Ave

Meers Porter Hill Rd

S Hill Rd

Lakeside Dr

Brookdale Rd

Kiowa Rd

Creek Rd

Lakeview Rd

Hereford Dr

Meadow Dr

Perry Rd

Resort Cir

Brookdale Rd

Lakeview Rd

Lake Ellsworth

365,126.6

362,001.4

361,258.4

372,322.5

369,969.3

366,726.7

368,357.7

348,032.6

347,731.3

348,611.9

348,408.3

349,670.2

335,234.7

351,764.2

355,644.2

336,024.6

355,460.1

337,188.5

352,861.6

356,329.6

338,478.9

338,329.5

338,208.9

337,631.6

344,831.9

339,162.1

340,838.7

339,284.4

355,083.9

341,645.1

342,830.1

344,054.2

333,855.5

98°20'15"W 98°21'0"W

34°49'30"N

98°21'0"W

98°21'45"W

98°22'30"W

34°49'0"N 34°48'30"N 34°48'0"N 34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N 34°45'30"N

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

EXPLANATION

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2–2. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’ Figure 2-2. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 2 15

1,160

1,180

1,140

1,200

1,120

1,220

1,240

1,260

1,280 1,300

1,240

1,200

1,160

1,180

1,220

1,240

1,260

1,220

1,200

1,200

1,220

1,200

1,180

1,220

1,140

1,180

1,200

1,140 1,160

1,180

1,180

1,260

1,160

1,160

1,220

1,200

1,140

1,160

1,160

1,240

1,140

1,260

1,180

1,240

1,160

1,140

1,140

1,200

1,220

1,220

1,180

1,260

1,220

1,140

1,200

1,220

1,180

1,200

1,180

1,200

1,140

1,180

1,160

1,140

1,220

1,140

1,240

1,200

1,260

1,160

1,160

1,220

1,180

1,200

1,220

1,220

1,220

1,240

1,160

1,200

1,180

1,260

1,180

1,240

1,140

1,200

1,160

1,240

1,240

1,240

1,260

1,200

1,180

1,180

1,180

1,200

1,180

1,160

1,180

1,140

1,200

1,140

1,160

1,220

1,220

1,180

1,220

1,160

1,160

1,160

1,220

1,220

1,240

1,280

1,180

1,180

1,160

1,180

§ ̈¦44

UV49

£¤62

Medicine Park

I- 44

US Hwy 62 US Hwy 281

US Hwy 277

Apache Gate Rd

H E Bailey Tpke

Glover Rd

N Cline Rd

N Wildhorse Rd

Otipoby Dr

McCracken Rd

Madische Rd

NW Dolese Rd

State Hwy 49

Vestal Ln

NW Madische Rd

NE Little Bear Loop

NW McIntosh Rd NW Mc Intosh Rd

Poor Farm Rd

NW Deluca Rd

Lester RdTackle Box Rd

Goodin Hill Rd NW Bingo Rd

NW Summer Ln

Madishe Rd

NW Spur Rd

NW Madische Rd

US Hwy 277

US Hwy 277 US Hwy 281 US Hwy 62 307,596

311,224

322,180

330,817

326,414.3

322,696.5

331,682

307,140.7

335,234.7

305,705.6

306,455.5 306,583.4 306,798.6

310,492.3

310,343.3

311,096.7

303,507.6

327,843.7

300,803.9

310,689.4

328,735.4

336,024.6

308,880.3

302,473.2

330,016.4

314,903

308,068.4

312,021.4

333,855.5

299,491.8

298,818

314,772.2

337,188.5

314,993.8

317,499.7

316,747.8

317,058.7

320,778.3

338,478.9 338,329.5 338,208.9

344,831.9

339,162.1

340,838.7

339,284.4

319,674.8

341,645.1

318,647.5

342,830.1

344,054.2

98°22'30"W

98°23'15"W

98°24'0"W

34°46'30"N 34°46'0"N 34°45'30"N 34°45'0"N 34°44'30"N 34°44'0"N 34°43'30"N 34°43'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-3. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 2–3. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
16 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,100

1,120

1,140

1,160

1,180

1,200

1,220

1,080

1,180

1,160

1,120

1,120

1,120

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1,160

1,160

1,160

1,100

1,120

1,160

1,120

1,120

1,120

1,160

1,160

1,160

1,120

1,180

1,160

1,120

1,120

1,200

1,200

1,100

1,140

1,140

1,140

1,160

1,200

1,120

1,140

1,160

1,220

1,180

1,140

1,180

1,120

1,140

1,160

1,160

1,160

1,140

1,140

1,120

1,200

1,120

1,180

1,120

1,120

1,180

1,180

1,120

1,160

1,160

1,120

1,120

1,100

1,120

1,180

1,120

1,180

1,180

1,120

1,120

1,120

1,120

1,120

1,140

1,120

1,180

1,120

1,120

1,120

1,120

1,120

1,120

1,200

1,180

1,160

1,120

1,140

1,160

1,120

1,140

1,120

1,100

1,120

1,120

1,140

1,120

1,120

1,160

1,160

1,120

1,140

1,120

1,120

1,120

1,120

1,160

1,120

1,140

1,140

1,120

1,120

1,120

1,120

1,160

1,160

1,140

1,120

1,200

§ ̈¦44

UV49

Medicine Park

I- 44 US Hwy 62 US Hwy 281 US Hwy 277

Elgin Rd

H E Bailey Tpke

Otipoby Dr

Beef Creek Rd

Apache Gate Rd

Bald Ridge Rd

Randolph Rd

Chatto Rd

Knob Hill Rd

N Wildhorse Rd

Corral Rd

State Hwy 49

Dodge Hill Rd

Howitzer Trl

Geronimo Rd

E Cache Creek Rd

Sheridan Rd

1st

Boundary Rd

Gruber Rd

Quinette Rd

Knox Rd

Bob Pennell Rd

Hamilton Rd

McNair Rd

Cache Creek Rd

Upton Rd

Lauman Ave

Rothwell St

Harry Rd

Batson Ave

Edwards St

Leever Ave

Back Access Rd

Ganahl Rd

Manley Rd

Macomb Rd

Berry St

Rucker Rd

Honeycutt Rd

Gordan St

Nottingham St

Bessinger St

Stout Ave

Isbell Rd

N Boundary Rd

Fowler Rd

Chickasha Rd

Turner Rd

McBride Ave

Lubberman Rd

King Rd

Montague

Conner Rd

Rothwell St

Rucker Rd

Corral Rd

US Hwy 277

1st

US Hwy 62

Howitzer Trl

Rothwell St

Quinette Rd

Berry St

Back Access Rd

298,818

277,180

279,285.7

280,574.8

275,823.7

295,989.4

276,674.2

286,913

278,250.7

281,371.3

268,923.7

299,491.8

274,671.4

300,803.9

270,986.3

288,963.5

271,415.6

293,664.3

295,153.8

271,245.9

286,063

302,473.2

267,432.5

290,246.9

271,878.1

269,276.7

273,085.8

303,507.6

289,536.5

283,363

288,059.1

294,812.5

293,080.5

285,081.1

305,705.6

283,958.5

281,610.9

281,445.4

306,455.5

306,583.4

265,583.9

307,140.7

98°22'30"W

98°23'15"W

98°24'0"W

34°43'30"N 34°43'0"N 34°42'30"N 34°42'0"N 34°41'30"N 34°41'0"N 34°40'30"N 34°40'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-4. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 2–4. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 2 17

1,100

1,120

1,140

1,160

1,180

1,200

1,220

1,080

1,180

1,160

1,120

1,120

1,120

1,140

1,160

1,160

1,160

1,100

1,120

1,160

1,120

1,120

1,120

1,160

1,160

1,160

1,120

1,180

1,160

1,120

1,120

1,200

1,200

1,100

1,140

1,140

1,140

1,160

1,200

1,120

1,140

1,160

1,220

1,180

1,140

1,180

1,120

1,140

1,160

1,160

1,160

1,140

1,140

1,120

1,200

1,120

1,180

1,120

1,120

1,180

1,180

1,120

1,160

1,160

1,120

1,120

1,100

1,120

1,180

1,120

1,180

1,180

1,120

1,120

1,120

1,120

1,120

1,140

1,120

1,180

1,120

1,120

1,120

1,120

1,120

1,120

1,200

1,180

1,160

1,120

1,140

1,160

1,120

1,140

1,120

1,100

1,120

1,120

1,140

1,120

1,120

1,160

1,160

1,120

1,140

1,120

1,120

1,120

1,120

1,160

1,120

1,140

1,140

1,120

1,120

1,120

1,120

1,160

1,160

1,140

1,120

1,200

§ ̈¦44

UV49

Medicine Park

I- 44 US Hwy 62 US Hwy 281 US Hwy 277

Elgin Rd

H E Bailey Tpke

Otipoby Dr

Beef Creek Rd

Apache Gate Rd

Bald Ridge Rd

Randolph Rd

Chatto Rd

Knob Hill Rd

N Wildhorse Rd

Corral Rd

State Hwy 49

Dodge Hill Rd

Howitzer Trl

Geronimo Rd

E Cache Creek Rd

Sheridan Rd

1st

Boundary Rd

Gruber Rd

Quinette Rd

Knox Rd

Bob Pennell Rd

Hamilton Rd

McNair Rd

Cache Creek Rd

Upton Rd

Lauman Ave

Rothwell St

Harry Rd

Batson Ave

Edwards St

Leever Ave

Back Access Rd

Ganahl Rd

Manley Rd

Macomb Rd

Berry St

Rucker Rd

Honeycutt Rd

Gordan St

Nottingham St

Bessinger St

Stout Ave

Isbell Rd

N Boundary Rd

Fowler Rd

Chickasha Rd

Turner Rd

McBride Ave

Lubberman Rd

King Rd

Montague

Conner Rd

Rothwell St

Rucker Rd

Corral Rd

US Hwy 277

1st

US Hwy 62

Howitzer Trl

Rothwell St

Quinette Rd

Berry St

Back Access Rd

298,818

277,180

279,285.7

280,574.8

275,823.7

295,989.4

276,674.2

286,913

278,250.7

281,371.3

268,923.7

299,491.8

274,671.4

300,803.9

270,986.3

288,963.5

271,415.6

293,664.3

295,153.8

271,245.9

286,063

302,473.2

267,432.5

290,246.9

271,878.1

269,276.7

273,085.8

303,507.6

289,536.5

283,363

288,059.1

294,812.5

293,080.5

285,081.1

305,705.6

283,958.5

281,610.9

281,445.4

306,455.5

306,583.4

265,583.9

307,140.7

98°22'30"W

98°23'15"W

98°24'0"W

34°43'30"N 34°43'0"N 34°42'30"N 34°42'0"N 34°41'30"N 34°41'0"N 34°40'30"N 34°40'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-4. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 2–5. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
18 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,060

1,040

1,080

1,100

1,120

1,140

1,100

1,080

1,080

1,060

1,060

1,060

1,060

1,080

1,060

1,060

1,060

1,060

1,120

1,080

1,100

1,120

1,120

1,100

1,080

1,120

1,100

1,040

1,060

1,080

1,080

1,100

1,060

1,080

1,100

1,080

1,060

1,100

1,080

1,060

1,080

1,060

1,120

1,120

1,100

1,080

1,100

1,060

1,080

1,120

1,060

1,120

1,120

1,080

1,060

1,080

1,120

1,060

1,040

1,100

1,100

1,040

1,120

1,060

1,060

1,120

1,060

1,060

1,120

1,080

1,100

1,080

1,080

1,080

1,060

1,120

1,100

1,080

1,060

1,100

1,060

1,060

1,060

1,060

1,080

1,060

1,080

1,080

1,120

1,100

1,100

1,100

1,060

1,100

§ ̈¦44

UV7

£¤281B

Lawton

I- 44 US Hwy 277 US Hwy 281

Pioneer Expy

H E Bailey Tpke

S Railroad St

State Hwy 7

SE 15th St

SE Lee Blvd

SW 6th St

SE Bishop Rd

US Hwy 281 Bus SW 2nd St

SW 4th St

SW 11th St

SW 5th St

SE Coombs Rd

SE 1st St

SE Tower Rd

SE 8th St

SW Bishop Rd

SW I Ave

SW Coombs Rd

E Gore Blvd

SW 3rd St

SW 7th St

SW H Ave

SW Lee Blvd

SE 2nd St

SW D Ave

SE Interstate Dr

SE H Ave

SW E Ave

SE Skyline Dr

SW Belmont Ave

SE F Ave

SW A Ave

SW C Ave

SW F Ave

SW Grand Ave

SW G Ave

SW Park Ave

SE Larrance St

NW 3rd St

SE J Ave

W Gore Blvd

SW Highland Ave

NW 2nd St

SW Summit Ave

NW 1st St

SW Magnolia Ave

SW B Ave

SW Gore Blvd

SW Douglas Ave

SE B Ave

SE D Ave

SW Monroe Ave

SE Flower Mound Rd

SE 6th St

SE 7th St

SW 1st St

SW Jefferson Ave

SE Wallock St

SE Park Ave

SW Garfield Ave

SW 8th St

SW Texas Ave

SE I Ave

SE Simpson St

N Railroad St

Sharps Ln

NE Bell Ave

SW Sedalia Ave

SW McKinley Ave

SE 4th St

SW Arbuckle Ave

4th St E

King

SW Roosevelt Ave

SE 135th St

SE Stafford St

SW 10th St

SW Abilene Dr

Main St

SW J Ave

SW Overland Dr

NE Arlington Dr

SE Monroe Ave

SW Butterfield Dr

SW Sedalia Pl

Pioneer Expy

SW E Ave

US Hwy 281 Bus

US Hwy 277

SE I Ave

SW 3rd St

H E Bailey Tpke

SW 3rd St

SW F Ave

W Gore Blvd

SW 4th St

US Hwy 277

SW 6th St

SW C Ave

SW 5th St

US Hwy 281

SW G Ave

SE D Ave

I- 44

S Railroad St

202,037

218,567

206,365.9

207,647.8

205,255.5

225,035.9

207,532.2

207,386.2

223,887.6

199,233.3

221,849.7

221,444.5

208,488.3

219,489.5

220,619.2

220,955.3

226,157.6

196,556.4

203,233.8

195,820.1

223,049.6

200,771.3

207,841.1

223,473.4

223,274.7

210,476.2

225,439.7

212,634.5

224,652.6

217,835.3

216,742.7

211,410.2

227,661.4

213,433.2

214,111.8

227,118.3

214,945.9

216,072.3

194,930.1

215,374.7

215,227.7

215,092.2

228,176.4

193,653.9

228,601.7

191,861.5

228,962.7

98°21'0"W 98°21'45"W

34°36'30"N

98°21'45"W

98°21'0"W

98°22'30"W

98°23'15"W

34°36'0"N 34°35'30"N 34°35'0"N 34°34'30"N 34°33'30"N 34°33'0"N 34°32'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-6. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 2–6. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 2 19

1,040

1,060

1,020

1,080

1,100

1,120

1,140

1,160

1,180

1,060

1,040

1,040

1,060

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,060

1,080

1,040

1,080

1,040

1,040

1,040

1,040

1,080

1,040

1,060

1,060

1,040

1,080

1,040

1,040

1,020

1,040

1,040

1,020

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,040

1,020

1,060

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,080

1,020

1,100

1,080

1,040

1,020

1,080

1,040

1,040

1,040

1,040

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,020

1,040

1,060

1,060

1,060

1,060

1,040

1,020

1,080

1,040

1,020

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

§ ̈¦44

£¤281B

Lawton

Lawton

S Railroad St

SE 15th St

I- 44

SE Tinney Rd

SW 11th St

US Hwy 277

SE Pecan Dr

US Hwy 281

Srailroad St

Pioneer Expy

H E Bailey Tpke

SW Tinney Rd

SE Base Line Rd

SE Flower Mound Rd

SE Goodin Rd

SE 135th St

S 11th St

US Hwy 281A Baseline

N2580 Rd

E1740 Rd

SE Baseline Rd

Goodin Rd

SE Goodin RdSE Pecan Dr

I- 44

177,474

191,049

179,479.6

182,271.7

181,016.6

180,665.8

190,088.3

177,361.5

177,076.1

189,562.5

188,764.9

186,263.8

187,633.2

191,861.5

202,037

185,580.1

175,752.7

184,132.9

175,169.8

172,347.6

183,159.9

193,653.9

164,251.1

171,129.6

164,581.6

168,408.2

161,814.8

168,318.2

199,233.3

164,709.6

159,392.6

196,556.4

165,167.9

195,820.1

200,771.3

194,930.1

159,070.8

169,522.3

168,654.6

168,560.8

158,391.3

205,255.5

203,233.8

155,185.6

153,714.8

206,365.9

152,097.6

207,386.2

98°21'45"W 98°21'0"W

34°33'30"N

98°22'30"W

98°23'15"W

98°24'0"W

98°24'45"W

34°33'30"N 34°33'0"N 34°32'30"N 34°32'0"N 34°31'30"N 34°30'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-7. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 2–7. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
20 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,000

1,020

1,040

1,060

1,080

1,020

1,020

1,020 1,020

1,020

1,060

1,020

1,000

1,020

1,020

1,040

1,020

1,000

1,080

1,000

1,000

1,000

1,020

1,040

1,020

1,040

1,040

1,000

1,020

1,020

1,060

1,000

1,020

1,000

1,020

1,020

1,000

1,020

1,020

1,020

1,040

1,040

1,020

1,040

1,020

1,060

1,000

1,000

1,040

1,020

1,020

1,000

1,000

1,060

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,020

1,080

1,020

1,080

1,020

1,020

1,040

1,060

1,000

1,020

1,040

1,020

1,040

1,020

1,040

1,040

1,060

1,060

1,000

1,000

1,000

1,060

1,020

1,020

1,000

1,000

1,060

1,040

1,000

1,000

1,060

1,040

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,040

1,020

1,040

1,080

1,020

1,000

1,060

1,020

1,000

1,020

1,020

1,000

1,020

1,040

1,020

1,040

1,020

1,060

1,020

1,020

Geronimo

E1770 Rd

Co Rd E1770

Co Rd N2600

SE Logue Chapel Rd

Devine Rd

E1750 Rd

E1770 Rd

N2610 Rd

Co Rd E1770

N2600 Rd

SE Devine Rd

SE New Hope Rd

SE Burk Rd

SE Flowermound Rd

SE 45th Rd

Osage St

E1760 Rd

SE Baseline Rd

SE Base Line Rd

E1750 New Hope

E1740 Rd

SE Holiday Rd

SE Devine Rd

SE New Hope Rd

SE Devine Rd

SE New Hope Rd

150,072

142,877.6

137,438

142,324.4

140,508.8

140,353.6

114,397.3

109,789.2

119,497.3

138,272.6

143,853.8

118,361.6

113,022.2

140,112.9

118,964.1

98,636

152,097.6

146,761.8

100,311.7

131,416.9

106,145.6

132,727.3

136,248.1

104,166.2

134,168.4

153,714.8

99,027.5

129,845.5

98,871.9

135,606.2

123,970.8

121,198.7

131,726.3

131,559.8

133,113.1

135,039.8

132,195.2

152,975.3

133,599.3

99,268.8

96,645.5

102,608.9

155,185.6

158,391.3

159,392.6

159,070.8

95,100.6

161,814.8

98°21'0"W

98°21'45"W

98°22'30"W

34°30'30"N 34°30'0"N 34°29'30"N 34°29'0"N 34°28'30"N 34°28'0"N 34°27'30"N 34°27'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-8. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 2–8. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 2 21

980

1,000

1,020

960

1,040

1,060

980

1,000

1,060

980

1,000

980

980

1,020

1,040

980

1,000

1,020

980

1,000

980

1,000

1,020

1,000

1,020

1,000

1,000

1,000

1,020

1,000

980

980

1,000

1,000

1,060

980

1,040

980

980

1,000

980

980

980

1,020

980

1,060

1,040

1,020

980

1,020

980

1,000

980

1,000

980

980

980

1,000

980

1,000

1,060

980

980

1,000

980

1,020

980

980

980

1,060

1,020

980

980

1,020

980

1,060

1,060

980

1,000

980

1,020

980 980

980

980

1,040

980

1,000

980

980

1,000

1,000

1,040

980

980

980

1,000

980

980

1,040

980

980

1,000

980 1,000

1,060

1,000

980

1,060

1,060

980

1,000

1,040

1,020

980

1,020

980

1,040

1,000

1,000

980

1,040

980

1,000

980

980

1,020

1,000

980

980

Co Rd N2600

E1770 Rd

Co Rd N2620

Co Rd E1770

Co Rd N2610

Co Rd E1810

Co Rd E1790

Co Rd E1780

Co Rd E1800

SE Logue Chapel Rd

Co Rd E1790

Co Rd E1810

SE Logue Chapel Rd

Co Rd E1780

E1770 Rd Co Rd E1770

53,978.4

56,964.5

59,898

46,952.8

52,770.5

71,796.3

48,384.8

50,719.5

49,468.2

98,636

77,329.9

42,846.7

63,911.6

65,331.5

74,567.5

76,713.3

62,381.6

79,177.1 78,179.7

99,027.5

41,670.7 41,521.6

89,566.6

80,669.9

99,268.8

88,078.1

84,743.6

96,645.5

86,554.3

95,100.6

93,656.1

81,690.7

91,941.4

82,320.1

83,567.3

100,311.7

98°18'45"W

98°19'30"W

98°20'15"W

34°27'0"N 34°26'30"N 34°26'0"N 34°25'30"N 34°25'0"N 34°24'30"N 34°24'0"N 34°23'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-9. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 2–9. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
22 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#

960

980

1,000

940

1,020

980

980

980

980

940

980

960

1,000

960

980

960

980

980

980

980

960

960

1,000

980

980

1,000

960

980

980

980

960

960

960

960

940

980

980

960

980

1,000

980

1,000

960

980

980

1,020

1,020

960

980

960

960

980

980

980

980

960

980

1,000

980

1,000

960

980

960

960

960

960

980

980

980

940

980

980

960

980

980

1,000

960

960

960

960

980

980

960

980

980

940

1,000

1,000

1,020

980

1,000

980

980

980

980

980

960

980

980

980

1,000

980

980

980

960

980

1,000

960

980

UV53

UV5

Walters

07311000

Hwy 53

Co Rd N2610

Co Rd N2620

Co Rd E1820

Co Rd N2640

Indian Hwy

Co Rd N2630

Co Rd N2622

N 1st St

N 3rd St

Co Rd N2650

N 2nd St

Co Rd E1840

N 5th St

E Missouri Ave

Co Rd D1825

S 1st St

E Iowa Ave

N 6th St

E Nevada Ave

E Kansas Ave

S 3rd St

Co Rd E1810

N 7th St

N 9th St

E Oklahoma Ave

N Broadway St

W Missouri Ave

E Boston Ave

S 5th St

W Colorado Ave

S 2nd St

E Washington Ave

E Texas Ave

W Iowa Ave

S Central Ave

S 6th St

E Indiana Ave

S 7th St

S Broadway St

W Kansas Ave

E Arlington Ave

Lauren Ln

W Arlington Ave

E Cleveland Ave

S 8th St

S Ross St

Co Rd N2630

Co Rd E1820

Dave Boyer Lake

25,330.3

30,362.4

26,836.6

41,286.4

32,210.9

41,413.9

34,847.6

34,287.9

15,792.2

41,521.6

15,917.9

33,393.4

15,628.5

23,747.6

15,408.5

41,670.7

13,673.5

13,254.9

22,740.7

11,502.5

15,278.3

42,846.7

7,256.1

16,963.7

46,952.8

17,976.7

17,490.3

20,671.9

18,660.1

19,293.3

20,059.4

48,384.8

49,468.2

98°19'30"W 98°18'45"W 98°18'0"W 98°17'15"W 98°16'30"W 98°15'45"W

34°22'30"N

34°23'0"N

34°23'30"N

34°24'0"N

98°20'15"W

34°23'0"N 34°22'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Lake Ellsworth Walters

¢

Figure 2-10. Cross-section locations for Lake Ellsworth for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 2–10. Cross-section locations for Lake Ellsworth, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 3 Appendix 3 23

#0

1,180

1,160

1,220

1,200

1,240

1,260

1,280

1,300

1,200

1,220

1,240

1,200

1,300

1,260

1,260

1,180

1,180

1,260

1,180

1,240

1,200

1,220

1,260

1,240

1,180

1,240

1,160

1,280

1,200

1,200

1,240

1,220

1,240

1,220

1,180

1,260

1,280

1,160

1,280

1,240

1,180

1,240

1,200

1,200

1,200

1,240

1,220

1,240

1,200

1,260

1,240

1,200

1,280

1,240

1,260

1,260

1,200

1,240

1,260

§ ̈¦44

£¤62

£¤277 2:55

3:10

Apache

Elgin

Elgin

07308990

US Hwy 62 US Hwy 281

Tony Creek Rd

US Hwy 277

I- 44

E1490 Rd

Dunn Rd

Glover Rd

County Line Rd

NE King Rd

Edgewater Blvd

Lake Rd

NE Watts Rd Cherry Rd

NE Happy Hollow Rd

Hilltop Rd

NW Wolf Rd

Bonnifield Rd

H E Bailey Tpke

Quail Trl

NW North Dr

NW Pine Ave

Happy Hollow

Watts NW Cherry Rd

1st St

Hillside Rd

NE 30th St

Ellsworth Rd

4th St

Meers Porter Hill Rd

Lakeview Ave

Waterfront Dr

Happy Hollow Rd

Fir Ave

NE Tony Creek Dr

Lakeview Rd

NE Fisherman's Cove Dr

Harned Rd

Ash Ave

Pine Ave

Fisherman Dr

Robin Ln

Ellsworth Dr

S Hill Rd

Lakeside Dr Creek Rd

NE Track Rd

Sunvalley Dr

E1490 Rd County Line Rd

NE King Rd NE King Rd

Lake Ellsworth

361,258.4

369,969.3

379,415.9

391,040.1

98°18'45"W

98°19'30"W

98°20'15"W

98°21'0"W

98°21'45"W

98°22'30"W

98°23'15"W

98°24'0"W

34°53'30"N 34°53'0"N 34°52'30"N 34°52'0"N 34°51'30"N 34°51'0"N 34°50'30"N 34°50'0"N 34°49'30"N 34°49'0"N 34°48'30"N 34°48'0"N 34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-1. Inundated areas for Lake Ellsworth dam-breach scenarios modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a). Figure 3–1. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
24 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#0

1,180

1,160

1,200

1,220

1,240

1,260

1,140

1,280

1,300

1,240

1,240

1,180

1,220

1,280

1,220

1,220

1,180

1,220

1,240

1,220

1,260

1,260

1,220

1,280

1,180

1,200

1,180

1,180

1,180

1,220

1,240

1,240

1,180

1,260

1,200

1,240

1,180

1,200

1,240

1,240

1,240

1,300

1,260

1,260

1,220

1,200

1,280

1,200

1,180

1,260

1,260

1,260

1,220

1,240

1,240

1,220

1,280

1,180

1,240

1,220

1,180

1,200

1,200

1,240

1,260

1,200

1,240

1,260

1,180

1,240

1,220

1,280

1,240

1,280

1,280

1,260

1,200

1,200

1,180

1,200

1,220

1,220

1,220

1,160

1,220

1,200

1,180

1,260

1,160

1,200

1,280

1,240

1,220

1,220

1,180

1,200

1,240

1,160

1,200

1,240

1,200

1,280

1,180

1,240

1,240

1,200

1,260

1,180

1,260

1,220

1,240

1,180

1,240

1,240

1,260

1,240

£¤62

£¤277

2:55

3:10

07308990

US Hwy 62

US Hwy 281

US Hwy 277

Glover Rd

Dunn Rd

Bonnifield Rd

Cherry Rd

Hilltop Rd

1st St

Hillside Rd

NE 30th St

4th St

NE Bonniefield Rd

NW Dolese Rd

Fir Ave

2nd St

Edgewater Blvd

3rd Ave

Oak Ave

Pine Ave

NE Pine Ave

Meers Porter Hill Rd

S Hill Rd

Lakeside Dr

Brookdale Rd

Kiowa Rd

Creek Rd

Lakeview Rd

Hereford Dr

Meadow Dr

Perry Rd

Resort Cir

Brookdale Rd

Lakeview Rd

Lake Ellsworth

361,258.4

369,969.3

348,408.3

337,631.6

98°20'15"W 98°21'0"W

34°49'30"N

98°21'0"W

98°21'45"W

98°22'30"W

34°49'0"N 34°48'30"N 34°48'0"N 34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N 34°45'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-2. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 3–2. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 3 25

!

!

Tiapiha Park

MADDISCHE EST WWT

1,160

1,180

1,140

1,200

1,120

1,220

1,240

1,260

1,280 1,300

1,240

1,200

1,160

1,180

1,220

1,240

1,260

1,220

1,200

1,200

1,220

1,200

1,180

1,220

1,140

1,180

1,200

1,140 1,160

1,180

1,180

1,260

1,160

1,160

1,220

1,200

1,140

1,160

1,160

1,240

1,140

1,260

1,180

1,240

1,160

1,140

1,200

1,220

1,220

1,180

1,260

1,220

1,140

1,200

1,220

1,180

1,200

1,180

1,200

1,140

1,180

1,160

1,140

1,220

1,140

1,240

1,200

1,260

1,160

1,160

1,220

1,180

1,200

1,220

1,220

1,220

1,240

1,140

1,160

1,200

1,180

1,260

1,180

1,240

1,140

1,200

1,160

1,240

1,240

1,240

1,260

1,200

1,180

1,180

1,180

1,200

1,180

1,160

1,180

1,140

1,200

1,140

1,160

1,220

1,220

1,180

1,220

1,160

1,160

1,160

1,220

1,220

1,240

1,280

1,180

1,180

1,160

1,180

§ ̈¦44

UV49

£¤62

4:10

3:35

3:10

Medicine Park

I- 44

US Hwy 62 US Hwy 281

US Hwy 277

Apache Gate Rd

H E Bailey Tpke

Glover Rd

N Cline Rd

N Wildhorse Rd

Otipoby Dr

McCracken Rd

Madische Rd

NW Dolese Rd

State Hwy 49

Vestal Ln

NW Madische Rd

NE Little Bear Loop

NW McIntosh Rd NW Mc Intosh Rd

Poor Farm Rd

NW Deluca Rd

Lester RdTackle Box Rd

Goodin Hill Rd NW Bingo Rd

NW Summer Ln

Madishe Rd

NW Spur Rd

NW Madische Rd

US Hwy 277

US Hwy 281

US Hwy 62

306,455.5

327,843.7

316,747.8

337,631.6

98°22'30"W

98°23'15"W

98°24'0"W

34°46'30"N 34°46'0"N 34°45'30"N 34°45'0"N 34°44'30"N 34°44'0"N 34°43'30"N 34°43'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-3. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 3–3. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
26 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

!

!

!

!

!

!

!

!

!

Rucker Park

Legion Park

Butner Field

Ambrosia Park

GERONIMO ROAD ES

1,100

1,120

1,140

1,160

1,180

1,200

1,220

1,080

1,180

1,160

1,120

1,120

1,120

1,140

1,160

1,160

1,160

1,100

1,120

1,160

1,120

1,120

1,120

1,160

1,160

1,160

1,120

1,180

1,160

1,120

1,120

1,200

1,200

1,100

1,140

1,140

1,140

1,160

1,200

1,120

1,140

1,160

1,220

1,180

1,140

1,180

1,120

1,140

1,160

1,160

1,160

1,140

1,140

1,120

1,200

1,120

1,180

1,120

1,120

1,180

1,180

1,120

1,160

1,160

1,120

1,120

1,100

1,120

1,180

1,120

1,180

1,180

1,120

1,120

1,120

1,120

1,140

1,120

1,180

1,120

1,120

1,120

1,120

1,120

1,120

1,200

1,180

1,160

1,120

1,140

1,160

1,120

1,140

1,120

1,100

1,120

1,120

1,140

1,120

1,120

1,160

1,160

1,120

1,140

1,120

1,120

1,120

1,120

1,160

1,120

1,140

1,140

1,120

1,120

1,120

1,120

1,160

1,160

1,140

1,120

1,200

§ ̈¦44

UV49

5:30

5:00

4:10

Medicine Park

I- 44 US Hwy 62 US Hwy 281 US Hwy 277

Elgin Rd

H E Bailey Tpke

Otipoby Dr

Beef Creek Rd

Apache Gate Rd

Bald Ridge Rd

Randolph Rd

Chatto Rd

Knob Hill Rd

N Wildhorse Rd

Corral Rd

State Hwy 49

Dodge Hill Rd

Howitzer Trl

Geronimo Rd

E Cache Creek Rd

Sheridan Rd

1st

Boundary Rd

Gruber Rd

Quinette Rd

Knox Rd

Bob Pennell Rd

Hamilton Rd

McNair Rd

Cache Creek Rd

Upton Rd

Lauman Ave

Rothwell St

Harry Rd

Batson Ave

Edwards St

Leever Ave

Back Access Rd

Manley Rd

Macomb Rd

Berry St

Rucker Rd

Honeycutt Rd

Gordan St

Nottingham St

Bessinger St

Stout Ave

Isbell Rd

N Boundary Rd

Fowler Rd

Chickasha Rd

Turner Rd

McBride Ave

Lubberman Rd

King Rd

Montague

Conner Rd

Rothwell St

Rucker Rd

Corral Rd

US Hwy 277

1st

US Hwy 62

Howitzer Trl

Rothwell St

Quinette Rd

Berry St

Back Access Rd

295,989.4

274,671.4

285,081.1

306,455.5

98°22'30"W

98°23'15"W

98°24'0"W

34°43'30"N 34°43'0"N 34°42'30"N 34°42'0"N 34°41'30"N 34°41'0"N 34°40'30"N 34°40'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-4. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 3–4. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 3 27

!

! !

!

!

!

!

!

!

!

!

!

Lake Helen

FT SILL WWT

Panther Park

O H Arnold Park

Veterans Center

GERONIMO ROAD ES

Charlie Ray Park

ElmerThomas Park

Lawton Indian Hospital

Comanche Nation Gaming Comm

1,080

1,100

1,120

1,060

1,140

1,160

1,180

1,100

1,080

1,100

1,140

1,120

1,120

1,140

1,100

1,080

1,100

1,120

1,080

1,160

1,140

1,080

1,140

1,060

1,140

1,080

1,080

1,140

1,080

1,120

1,080

1,100

1,100

1,140

1,080

1,080

1,080

1,080

1,140

1,080

1,080

1,120

1,100

1,180

1,080

1,100

1,100

1,100

1,080

1,120

1,100

1,100

1,060

1,120

1,120

1,140

1,080

1,120

1,140

1,120

1,120

1,120

1,080

1,140

1,120

1,080

1,100

1,120

1,160

1,100

1,080

1,080

1,100

1,140

1,120

1,140

1,120

1,100

1,080

1,080

1,100

1,100

1,140

1,080

1,100

1,120

1,140

1,080

1,100

1,120

1,140

1,120

1,140

1,080

1,120

1,120

1,080

1,120

1,120

1,100

1,100

1,100

1,140

1,080

1,060

1,120

1,100

1,120

1,120

1,080

1,120

1,100

1,100

1,080

1,100

1,140

1,080

1,100

1,140

1,080

1,120

1,120

1,100

1,080

1,080

1,120

1,080

1,140

1,080

1,140

1,120

1,080

1,080

1,080

1,080

1,120

1,080

1,100 1,080

1,080

1,080

1,080

1,120

1,100

1,120

§ ̈¦44

£¤281B

£¤62

6:50

6:20

5:30

Lawton

I- 44

US Hwy 277

US Hwy 281

H E Bailey Tpke

US Hwy 62 NE Rogers Ln

Stallings Rd

E Gore Blvd

Pioneer Expy

NE Lawrie Tatum Rd

NE 15th St

NE Flower Mound Rd

E Cache Creek Rd

NW 2nd St US Hwy 281 Bus

Post Rd

NE Cache Rd

S Boundary Rd

Geronimo Rd

Indian Trail Rd

Boundary Rd

S Boundary

Rothwell St

Gruber Rd

Sheridan Rd

Howitzer Trl

NW 1st St

Corral Rd

NW 4th St

Ott Rd

NW 3rd St

SW 2nd St

NE 20th St

SE 8th St

SW D Ave

NE 25th St

Honeycutt Rd

N Railroad St S Railroad St

Navea Rd

SE F Ave

NW Rogers Ln

SW A Ave

Grebel Rd

SW E Ave

W Gore Blvd

Greber Rd

NE Village Dr

SW C Ave

Perez Rd

Conklin Rd

SE Larrance St

NW Cache Rd

Philippe Rd

SW Gore Blvd

NW Ferris Ave

SW 4th St

Francis St

NE Cimarron Trl

NE Angus St

NE Pioneer Blvd

Randolph Rd

SW B Ave SE B Ave

SE D Ave

SW F Ave

NE Dunlop St

Harry Rd

SE Interstate Dr

Edwards St

NE 26th St

Suell Rd

NW Columbia Ave

SE 6th St

SE 7th St

NW Mission Blvd

SW 3rd St

Russbach Rd

SE Flower Mound Rd

NE 9th St

Rossbach Rd

NE Lake Ave

4th St

NE Babbit St

Berry St

NE Euclid Ave

NE 27th St

Greble Rd

NW Woodridge Dr

Tucker Rd

NE Carver St

NE Garden Ln

NE Bell Ave

NW Mimosa Ln

Gordan St

Darby St

NW Glendale Dr

Nottingham St

NE Fullerton St

SE 4th St

Bessinger St

NE Heritage Dr

NE English St

NE Heritage Ln

NE Larrance St

NE Heritage Creek Dr

Rumple Rd

NW 6th St

NE Dove Ln

NE 29th St

Mockingbird Rd

NE Skyline Cir

NE Euclid Dr

Angus Cir

SE Surrey Pl

NE Bob White Rd

Silcott Pl

Silcott Cir

Boundary Rd

Howitzer Trl

Pioneer Expy

SW F Ave

W Gore Blvd

Rothwell St

Corral Rd

Berry St

NE 25th St

Rothwell St

NW Rogers Ln

Tucker Rd

SE D Ave

Rossbach Rd

NE Carver St

232,747.5

242,954.9

251,795.2

264,016.7

98°21'45"W

98°22'30"W

98°23'15"W

34°40'0"N 34°39'30"N 34°39'0"N 34°38'30"N 34°38'0"N 34°37'30"N 34°37'0"N 34°36'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3–5. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Figure 3-5. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
28 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

!

!

!

!

!

Veterans Center

George M Lee Park

Comanche Nation Gaming Comm

1,060

1,040

1,080

1,100

1,120

1,140

1,100

1,080

1,080

1,060

1,060

1,060

1,060

1,080

1,060

1,060

1,060

1,060

1,080

1,100

1,120

1,120

1,100

1,080

1,120

1,100

1,040

1,060

1,080

1,080

1,100

1,060

1,080

1,100

1,080

1,060

1,100

1,080

1,060

1,080

1,060

1,120

1,120

1,100

1,080

1,100

1,060

1,080

1,120

1,120

1,120

1,080

1,120

1,060

1,080

1,120

1,060

1,040

1,100

1,100

1,040

1,120

1,060

1,060

1,120

1,060

1,060

1,120

1,080

1,100

1,080

1,080

1,080

1,060

1,120

1,100

1,080

1,060

1,100

1,060

1,060

1,060

1,060

1,080

1,060

1,080

1,080

1,100

1,100

1,100

1,060

1,100

§ ̈¦44

UV7

£¤281B

8:00

7:10

7:35

6:50

Lawton

I- 44 US Hwy 277 US Hwy 281

Pioneer Expy

H E Bailey Tpke

S Railroad St

State Hwy 7

SE 15th St

SE Lee Blvd

SW 6th St

SE Bishop Rd

US Hwy 281 Bus SW 2nd St

SW 4th St

SW 11th St

SW 5th St

SE Coombs Rd

SE 1st St

SE Tower Rd

SE 8th St

SW Bishop Rd

SW I Ave

SW Coombs Rd

E Gore Blvd

SW 3rd St

SW 7th St

SW H Ave

SW Lee Blvd

SE 2nd St

SW D Ave

SE Interstate Dr

SE H Ave

SW E Ave

SE Skyline Dr

SW Belmont Ave

SE F Ave

SW A Ave

SW C Ave

SW F Ave

SW Grand Ave

SW G Ave

SW Park Ave

SE Larrance St

NW 3rd St

SE J Ave

W Gore Blvd

SW Highland Ave

NW 2nd St

SW Summit Ave

NW 1st St

SW Magnolia Ave

SW B Ave

SW Gore Blvd

SW Douglas Ave

SE B Ave

SE D Ave

SW Monroe Ave

SE Flower Mound Rd

SE 6th St

SE 7th St

SW 1st St

SW Jefferson Ave

SE Wallock St

SE Park Ave

SW Garfield Ave

SW 8th St

SW Texas Ave

SE I Ave

SE Simpson St

N Railroad St

Sharps Ln

NE Bell Ave

SW Sedalia Ave

SW McKinley Ave

SE 4th St

SW Arbuckle Ave

4th St E

King

SW Roosevelt Ave

SE 135th St

SE Stafford St

SW 10th St

SW Abilene Dr

Main St

SW J Ave

SW Overland Dr

NE Arlington Dr

SE Monroe Ave

SW Butterfield Dr

SW Sedalia Pl

Pioneer Expy

SW E Ave

US Hwy 281 Bus

US Hwy 277

SE I Ave

SW 3rd St

H E Bailey Tpke

SW 3rd St

SW F Ave

W Gore Blvd

SW 4th St

US Hwy 277

SW 6th St

SW C Ave

SW 5th St

SW G Ave

SE D Ave

I- 44

S Railroad St

221,849.7

200,771.3

211,410.2

98°21'0"W 98°21'45"W

34°36'30"N

98°21'45"W

98°21'0"W

98°22'30"W

98°23'15"W

34°36'0"N 34°35'30"N 34°35'0"N 34°34'30"N 34°33'30"N 34°33'0"N 34°32'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-6. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 3–6. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 3 29

!

!

!

LAWTON WWT

Lawton Correction Facility

1,040

1,060

1,020

1,080

1,100

1,120

1,140

1,160

1,180

1,060

1,040

1,040

1,060

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,060

1,080

1,040

1,080

1,040

1,040

1,040

1,040

1,080

1,040

1,060

1,060

1,040

1,080

1,040

1,040

1,020

1,040

1,040

1,020

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,040

1,020

1,060

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,080

1,020

1,100

1,080

1,040

1,020

1,080

1,040

1,040

1,040

1,040

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,020

1,040

1,060

1,060

1,060

1,060

1,040

1,020

1,080

1,040

1,020

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

§ ̈¦44

£¤281B

9:20

8:00

Lawton

Lawton

S Railroad St

SE 15th St

I- 44

SE Tinney Rd

SW 11th St

US Hwy 277

SE Pecan Dr

US Hwy 281

Srailroad St

Pioneer Expy

H E Bailey Tpke

SW Tinney Rd

SE Base Line Rd

SE Flower Mound Rd

SE Goodin Rd

SE 135th St

S 11th St

US Hwy 281A Baseline

N2580 Rd

E1740 Rd

SE Baseline Rd

Goodin Rd

SE Goodin RdSE Pecan Dr

I- 44

180,665.8

190,088.3

200,771.3

168,654.6

158,391.3

98°21'45"W 98°21'0"W

34°33'30"N

98°22'30"W

98°23'15"W

98°24'0"W

98°24'45"W

34°33'30"N 34°33'0"N 34°32'30"N 34°32'0"N 34°31'30"N 34°30'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

Lawton

Lake Ellsworth Walters

¢

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Figure 3-7. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 3–7. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
30 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

GERONIMO NORTH WWT

1,000

1,020

1,040

1,060

1,080

1,020

1,020

1,020 1,020

1,020

1,060

1,020

1,000

1,020

1,020

1,040

1,020

1,000

1,080

1,000

1,000

1,000

1,020

1,040

1,020

1,040

1,040

1,000

1,020

1,020

1,060

1,000

1,020

1,000

1,020

1,020

1,000

1,020

1,020

1,020

1,040

1,040

1,020

1,040

1,020

1,060

1,000

1,000

1,040

1,020

1,020

1,000

1,000

1,060

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,020

1,080

1,020

1,080

1,020

1,020

1,040

1,060

1,000

1,020

1,040

1,020

1,040

1,020

1,040

1,040

1,060

1,060

1,000

1,000

1,000

1,060

1,020

1,020

1,000

1,000

1,060

1,040

1,000

1,000

1,060

1,040

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,040

1,020

1,040

1,080

1,020

1,000

1,060

1,020

1,000

1,020

1,020

1,000

1,020

1,040

1,020

1,040

1,020

1,060

1,020

1,020

10:45

11:40

Geronimo

E1770 Rd

Co Rd E1770

Co Rd N2600

SE Logue Chapel Rd

Devine Rd

E1750 Rd

E1770 Rd

N2610 Rd

Co Rd E1770

N2600 Rd

SE Devine Rd

SE New Hope Rd

SE Burk Rd

SE Flowermound Rd

SE 45th Rd

Osage St

E1760 Rd

SE Baseline Rd

SE Base Line Rd

E1750 New Hope

E1740 Rd

SE Holiday Rd

SE Devine Rd

SE New Hope Rd

SE Devine Rd

137,438

114,397.3

146,761.8

106,145.6

123,970.8

158,391.3

95,100.6

98°21'0"W

98°21'45"W

98°22'30"W

34°30'30"N 34°30'0"N 34°29'30"N 34°29'0"N 34°28'30"N 34°28'0"N 34°27'30"N 34°27'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

Lawton

Lake Ellsworth Walters

¢

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Figure 3–8. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Figure 3-8. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 3 31

980

1,000

1,020

960

1,040

1,060

980

1,000

1,060

980

1,000

980

980

1,020

1,040

980

1,000

1,020

980

1,000

980

1,000

1,020

1,000

1,020

1,000

1,000

1,000

1,020

1,000

980

980

1,000

1,000

1,060

980

1,040

980

980

1,000

980

980

980

1,020

980

1,060

1,040

1,020

980

1,020

980

1,000

980

1,000

980

980

980

1,000

980

1,000

1,060

980

980

1,000

980

1,020

980

980

980

1,060

1,020

980

980

1,020

980

1,060

1,060

980

1,000

980

1,020

980 980

980

980

1,040

980

1,000

980

980

1,000

1,000

1,040

980

980

980

1,000

980

980

1,040

980

980

1,000

980 1,000

1,060

1,000

980

1,060

1,060

980

1,000

1,040

1,020

980

1,020

980

1,040

1,000

1,000

980

1,040

980

1,000

980

980

1,020

1,000

980

980

11:40

14:15

Co Rd N2600

E1770 Rd

Co Rd N2620

Co Rd E1770

Co Rd N2610

Co Rd E1810

Co Rd E1790

Co Rd E1780

Co Rd E1800

SE Logue Chapel Rd

Co Rd E1790

Co Rd E1810

SE Logue Chapel Rd

Co Rd E1780

E1770 Rd Co Rd E1770

52,770.5

42,846.7

63,911.6

74,567.5

84,743.6

95,100.6

98°18'45"W

98°19'30"W

98°20'15"W

34°27'0"N 34°26'30"N 34°26'0"N 34°25'30"N 34°25'0"N 34°24'30"N 34°24'0"N 34°23'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3-9. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 3–9. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
32 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#

!

!

WALTERS WWT

Sulton Park

960

980

1,000

940

1,020

940

980

980

940

1,000

960

980

960

960

960

980

960

980

960

980

980

980

960

1,000

980

980

980

960

980

980

940

960

980

980

960

980

980

980

980

1,020

1,020

960

1,000

980

980

980

960

960

960

980

980

960

1,000

960

980

980

980

1,000

980

1,000

960

980

960

980

980

1,000

980

960

960

960

980

980

980

960

940

960

980

980

960

960

960

980

980

980

980

980

960

1,000

1,000

1,020

980

1,000

960

960

980

1,000

980

980

980

980

980

980

1,000

980

980

980

960

960

980

1,000

960

980

UV53

UV5

14:15

15:10

Walters

07311000

Hwy 53

Co Rd N2610

Co Rd N2620

Co Rd E1820

Co Rd N2640

Indian Hwy

Co Rd N2630

Co Rd N2622

N 1st St

N 3rd St

Co Rd N2650

N 2nd St

Co Rd E1840

N 5th St

E Missouri Ave

Co Rd D1825

E Iowa Ave

S 1st St

N 6th St

E Nevada Ave

E Kansas Ave

S 3rd St

Co Rd E1810

N 7th St

N 9th St

E Oklahoma Ave

N Broadway St

W Missouri Ave

E Boston Ave

S 5th St

W Colorado Ave

S 2nd St

E Washington Ave

E Texas Ave

W Iowa Ave

S Central Ave

S 6th St

E Indiana Ave

S 7th St

W Kansas Ave

S Broadway St

E Arlington Ave

Lauren Ln

W Arlington Ave

E Cleveland Ave

S 8th St

S Ross St

Co Rd E1820

Co Rd N2630

Dave Boyer Lake

32,210.9

11,502.5

42,846.7

20,671.9

98°19'30"W 98°18'45"W 98°18'0"W 98°17'15"W 98°16'30"W 98°15'45"W

34°22'30"N

34°23'0"N

34°23'30"N

34°24'0"N

98°20'15"W

34°23'0"N 34°22'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Ellsworth model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Lake Ellsworth Walters

¢

Figure 3–10. Inundated areas for dam-breach scenarios for Lake Ellsworth, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Figure 3-10. Inundated areas for Lake Ellsworth dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 4 Appendix 4 33

#0

1,360

1,340

1,320

1,280

1,260

1,380

1,300

1,400

1,420

1,440

1,460

1,480

1,500

1,240

1,520

1,540

1,560

1,580

1,400

1,300

1,520

1,480

1,420

1,380

1,380

1,300

1,400

1,480

1,520

1,400

1,420

1,460

1,380

1,540

1,440

1,400

1,500

1,280

1,440

1,400

1,320

1,500

1,280

1,500

1,420

1,440

1,380

1,440

1,360

1,400

1,500

1,460

1,400

1,420

1,340

1,300

1,500

1,340

1,320

1,400

1,380

1,440

1,500

1,260

1,460

1,480

1,400

1,380

1,440

1,300

1,360

1,300

1,480

1,360

1,460

1,380

1,380

1,440

1,400

UV58

UV49

Medicine Park

07309500

State Hwy 58

State Hwy 49

State Hwy 49 Scn

Forest Ave

Big Rock Rd

NW Meers Porter Hill

1st

Vista Ln

Miller Rd

NW Chibitty Rd

Tackle Box Rd State Hwy 157

W Lake Dr

NW Wolf Rd

E Lake Dr

NW Hillary Rd

NW McIntosh Rd

Deer Creek

Reed Rd

Park Rd

Robinson Rd

NW Burr Oak Dr

Cox Rd

Lake Rd

NW Miller Rd

McClung Rd

Lakeview Pl

Rhoades Rd

Sharon Rd

Eagle Mountain Rd

Lawtonka Rd

N Lake Dr

Lost Bridge Rd

Deer Creek Canyon Rd

Juniper Ln

Mae Ave

Lakeview Dr

NW Eagle Mountain Rd

Vine St

Meers Porter Hill Rd

Ranch Dr

Gray Hawk Dr

Brian Pl

Ft Sill Ave

Elake Dr

Forrest Ave

NW Tackle Box Rd

Ironpin Cr

Upper E Lake Dr

Pvo Rd

Wahnetah Ln

1st

1st

E Lake Dr

1st

NW Miller Rd

W Lake Dr

1st

E Lake Dr

E Lake Dr

Lake Lawtonka

Elmer Thomas Lake

339,231.6

340,538.8

344,546.6

343,243.8

351,650.2

345,906.2

341,946.6

350,321.8

355,296.7

354,701

356,905.4

346,966.5

348,959.2

356,333.3

347,857.1

353,999.6

352,929.3

330,759.6

336,345.7

331,136.4

332,374.8

336,990.4

337,965.3

98°31'30"W 98°30'45"W 98°30'0"W 98°29'15"W 98°28'30"W 98°27'45"W

34°46'30"N

34°47'0"N

34°47'30"N

34°48'0"N

98°32'15"W

98°33'45"W

34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-1. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–1. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
34 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#0

1,320

1,280

1,340

1,240

1,260

1,300

1,220

1,360

1,380

1,400

1,420

1,440

1,200

1,460

1,500

1,480

1,520

1,540

1,560

1,580

1,600

1,620

1,640

1,300

1,400

1,480

1,400

1,360

1,340

1,380

1,360

1,480

1,240

1,380

1,500

1,380

1,400

1,240

1,440

1,440

1,280

1,560

1,360

1,500

1,460

1,480

1,280

1,240

1,480

1,460

1,360

1,360

1,560

1,480

1,360

1,440

1,300

1,460

1,380

1,240

1,260

1,440

1,460

1,320

1,340

1,560

1,480

1,320

1,360

1,420

1,460

1,400

1,300

1,440

1,440

1,400

1,480

1,580

1,320

1,520

1,560

1,400

1,380

1,520

1,300

1,460

1,260

1,460

1,420

1,540

1,520

1,280

1,540

1,460

1,300

1,560

1,300

1,480

1,340

1,300

1,240

1,600

1,380

1,400

1,240

1,400

1,500

1,320

1,320

1,360

1,400

1,380

1,320

1,340

1,420

1,380

1,280

1,440

1,260

1,300

1,420

1,380

1,520

1,380

1,400

1,380

1,400

1,540

1,420

1,260

1,520

1,520

1,440

1,360

1,320

1,240

1,520

1,500

1,400

1,200

1,440

1,380

1,520

1,500

1,500

1,320

1,260

1,600

1,420

1,220

1,400

1,400

1,360

1,320

1,300

1,400

1,440

1,520

1,440

1,360

1,420

1,380

1,560

1,240

1,420

1,540

1,540

1,480

1,220

1,420

1,500

1,460

1,260

1,320

1,440

1,260

1,380

1,380

1,400

1,220

1,280

1,360

1,340

1,380

1,300

1,260

1,400

1,300

1,260

1,280

1,420

1,320

1,260

1,580

1,400

1,280

1,440

1,340

1,240

1,540

1,520

1,300

1,240

1,280

1,340

1,340

1,260

1,420

1,360

1,380

1,420

1,240

UV49

UV58

Medicine Park

07309500

State Hwy 49

N Boundary Rd

State Hwy 49 Scn

Forest Ave

1st

Big Rock Rd

4 Mile Rd

Rocky Twins Rd

Brush Canyon Rd

State Hwy 58

Deer Creek Canyon Rd

W Lake Dr

E Lake Dr

Mount Hinds 1280 Rd

Deer Creek

Punch Bowl Rd

N Lake Dr

Vine St

Brian Pl

S Pkwy Ave

Ft Sill Ave Rex Heath Dr

Elake Dr

Forrest Ave

NW Tackle Box Rd

Tjmber Creek Dr

Taylor Dr

W Lake Dr

E Lake Dr

Punch Bowl Rd

1st

E Lake Dr

E Lake Dr

1st

1st

Lake Lawtonka

Elmer Thomas Lake

339,231.6

324,792

313,348

340,538.8

315,090

321,657.9

324,596.6

315,968.6

316,964.8

324,134.9

313,912.7

312,448.4

322,376.6

322,921.2

325,048.7

341,946.6

323,760.8

311,445.3

325,271.3

330,308

317,680.9

330,759.6

336,345.7

310,856.9

343,243.8

335,942.4

331,136.4

320,981.3

332,040.9

335,601.4

326,148.9

332,374.8

336,990.4

333,469.6

332,601.4

329,346.2

335,332.2

326,850.2

320,133.2

319,196.2

327,741.9

334,103.8

309,442.3

338,753.1

344,546.6

306,752

334,409.1

98°30'0"W 98°29'15"W 98°28'30"W 98°27'45"W 98°27'0"W 98°26'15"W

34°43'30"N

34°44'0"N

34°44'30"N

34°45'0"N

98°30'45"W

98°31'30"W

34°45'0"N 34°44'30"N 34°44'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-2. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–2. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 4 35

1,220

1,200

1,240

1,180 1,260

1,160

1,280

1,300

1,340

1,360

1,320

1,380

1,400

1,420

1,440

1,460

1,480

1,500

1,520

1,540

1,560

1,300

1,480

1,280

1,340

1,460

1,280

1,380

1,160

1,240

1,200

1,420

1,280

1,340

1,260

1,320

1,280

1,240

1,180

1,400

1,240

1,220

1,220

1,200

1,220

1,320

1,320

1,160

1,540

1,260

1,280

1,240

1,240

1,260

1,200

1,500

1,300

1,160

1,260

1,200

1,180

1,200

1,340

1,200

1,240

1,260

1,240

1,260

1,180

1,260

1,520

1,260

1,240

1,200

1,220

1,220

1,320

1,220

1,440

1,300

1,220

1,280

1,280

1,200

1,180

1,200

1,240

1,360

1,220

1,220

1,240

1,280

1,240

1,280

1,440

1,260

1,360

1,420

1,480

1,260

1,540

1,260

1,200

1,320

1,380

1,260

1,200

1,220

1,260

1,200

1,240

1,220

1,260

1,260

1,180

UV49

Medicine Park

State Hwy 49

N Boundary Rd

State Hwy 49 Scn

Tower Two Rd

Punch Bowl Rd

Signal Mountain Rd

Rocky Twins Rd

4 Mile Rd

Artillery Ridge Rd

Hand Rd

Mount Hinds 1280 Rd

Quanahs Rd

Mount Hinds Rd

Ketch Creek Dr

Wildwood Rd

Autumn Dr

Cara Rd

Landmark Rd

Mt Scott Rd

S Autumn Ln

Tower Two Rd

State Hwy 49

Cara Rd

State Hwy 49 Scn

306,752

307,679.8

308,752.2

309,442.3

310,856.9

305,721.3

311,445.3

297,728.1

303,139.2

302,084.3

299,785.2

305,073.8

304,094.1

312,448.4

298,608.7

300,447.6

301,167.9

313,348

297,283.2

315,090

315,968.6

316,964.8

313,912.7

296,781.8

317,680.9

98°24'45"W 98°25'30"W 98°26'15"W

34°43'30"N

34°44'0"N

98°26'15"W

98°25'30"W

98°24'45"W

98°27'0"W

34°43'0"N 34°42'30"N 34°42'0"N 34°41'0"N 34°40'30"N 34°40'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-3. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–3. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
36 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,180

1,160

1,140

1,220

1,200

1,120

1,240

1,100

1,260

1,280

1,300

1,320 1,340

1,360

1,380

1,400

1,420

1,480

1,180

1,120

1,200

1,100

1,200

1,180

1,180

1,120

1,340

1,200

1,320

1,220

1,140

1,240

1,240

1,280

1,120

1,260

1,120

1,220

1,200

1,200

1,220

1,240

1,280

1,120

1,160

1,220

1,320

1,280

1,240

1,240

1,220

1,120

1,180

1,240

1,160

1,320

1,180

1,120

1,280

1,300

1,260

1,140

1,200

1,160

1,160

1,160

1,160

1,140

1,280

1,120

1,280

1,260

1,300

1,160

1,240

1,280

1,260

1,120

1,160

1,320

1,240

1,220

1,240

1,160

1,220

1,260

1,220

1,140

1,200

1,220

1,300

1,120

1,120

1,140

1,200

1,260

1,280

1,160

1,220

1,260

1,260

1,120

1,160

1,240

1,200

1,120

1,260

1,300

1,220

1,180

1,120

1,280

1,180

1,260

1,180

1,180

1,180

1,120

1,120

1,240

1,120

1,180

1,120

1,340

1,160

1,200

1,300

1,180

1,260

1,300

1,320

1,140

1,200

1,240

1,140

1,200

1,120

1,200

1,240

1,220

1,160

1,140

1,120

1,260

1,240

1,120

1,160

1,180

1,140

1,140

1,120

1,140

§ ̈¦44

Medicine Park

I- 44

Randolph Rd

Chatto Rd

Punch Bowl Rd

N Boundary Rd

Upton Rd

US Hwy 62

Fort Sill Blvd

Sheridan Rd

US Hwy 277

US Hwy 281

Currie Rd

H E Bailey Tpke

Craig Rd

Knob Hill Rd

Apache Gate Rd

King Rd

Rocky Twins Rd

Artillery Ridge Rd

Condon Rd

Quinette Rd

Bateman Rd

Hoskins Rd

Macomb Rd

Hand Rd

Austin Rd

Howitzer Trl

Lawson Rd

Elgin Rd

Lee Rd

Jones Rd

Lester Rd

Bob Pennell Rd

Adams Rd

Back Access Rd

McNair Rd

Lauman Ave

Burrill Rd

Barbour Rd

Batson Ave

Hunt Rd

Leever Ave

Myers Rd

Terry Loop

Tyner Rd

Manley Rd

Evans Rd

Hamilton Rd

Davidson Rd

Magruder Rd

Rucker Rd

Maury Rd

Donnelly Rd

Marcy Rd

Stout Ave

Isbell Rd

Mount Hinds Rd

Turner Rd

Hethering Loop

McBride Ave

Daly Rd

Bonner Rd

Montague

Conner Rd

Harvey Rd

Shanklin Cir

Myers Pl

Harper

Cruikshank Circulo

I- 44

Austin Rd

Rucker Rd

Currie Rd

Apache Gate Rd

Macomb Rd

Craig Rd

Quinette Rd

Back Access Rd

Back Access Rd

Macomb Rd

Barbour Rd

Apache Gate Rd

Back Access Rd

306,752

281,046.7

282,204.5

281,924.9

307,679.8

281,737.3

305,721.3

284,514

308,752.2

297,728.1

286,145.8

286,047.1

309,442.3

285,877.1

303,139.2

302,084.3

311,445.3

310,856.9

299,785.2

305,073.8

282,962.4

280,548.8

285,317.4

304,094.1

282,668.6

279,252.6

312,448.4

286,300.9

298,608.7

301,167.9

300,447.6

313,348

283,865.8

297,283.2

293,669.1

293,344.1

277,956.8

315,090

294,240.8

313,912.7

294,710.8

277,287.1

295,380.2

296,781.8

277,062.3

296,350.2

276,810.5

287,037.5

295,868.4

276,544.2

315,968.6

287,839.4

289,393

291,764.7

290,885.8 290,174.8

98°25'30"W 98°24'45"W 98°24'0"W 98°23'15"W

34°42'0"N

34°42'30"N

34°43'0"N

34°43'30"N

98°26'15"W

98°27'0"W

98°27'45"W

34°43'30"N 34°41'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-4. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–4. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 4 37

1,100

1,140

1,120

1,160

1,080

1,180

1,200

1,120

1,160

1,120

1,120

1,100

1,120

1,180

1,120

1,120

1,160

1,100

1,120

1,100

1,180

1,180

1,120

1,120

1,100

1,120

1,120

1,120

1,120

1,120

1,140

1,120

1,120

1,120

1,120

1,140

1,140

1,120

1,160

1,120

1,140

1,120

1,120

1,100

1,100

1,100

1,120

1,120

1,100

1,080

1,120

1,120

1,140

1,120

1,120

1,160

1,120

1,100

1,140

1,120

1,120

1,140

1,100

1,120

1,120

1,180

1,140

1,160

1,120

1,120

1,120

1,120

1,140

1,100

1,120

1,160

1,160

1,120

1,100

1,100

1,120

1,120

1,080

1,120

1,120

1,140

1,180

1,120

1,120

1,100

1,120

1,120

1,120

1,120

1,120

1,120

1,120

1,180

1,120

1,140

1,120

1,160

1,100

§ ̈¦44

£¤62

Lawton

I- 44

US Hwy 62

Fort Sill Blvd

US Hwy 281US Hwy 277

Elgin Rd

H E Bailey Tpke

Beef Creek Rd

Post Rd

Randolph Rd

Bald Ridge Rd

Geronimo Rd

Sheridan Rd

Condon Rd

Stallings Rd

Dodge Hill Rd

Bragg Rd

Corral Rd

Chatto Rd

Boundary Rd

S Boundary

Rothwell St

Quinette Rd

Upton Rd

Gruber Rd

Howitzer Trl

Knob Hill Rd

Hoskins Rd

Ott Rd

NE Rogers Ln

E Cache Creek Rd

King Rd

Macomb Rd

Mow-Way Rd

Honeycutt Rd

Blair Rd

Thomas St

NW Rogers Ln

Ringold Rd

Navea Rd

Grebel Rd

Greber Rd

Knox Rd

Perez Rd

Conklin Rd

Hamilton Rd

Philippe Rd

Rossbach Rd

Francis St

NE Cimarron Trl

NE Angus St

McNair Rd

Cache Creek Rd

NE Pioneer Blvd

Lauman Ave

Burrill Rd

Peden Rd

Fergusson Rd

Harry Rd

Batson Ave

Edwards St

Leever Ave

Suell Rd

Treat

Back Access Rd

Ganahl Rd

Manley Rd

Havron Rd

Rutledge Rd

Hammel Rd

NE Babbit St

Wolfe Rd

Berry St

Lee Rd

Austin Rd

Greble Rd

Bob Pennell Rd

Rucker Rd

Tucker Rd

Kinzel Rd

Follett Rd

NE 9th St

Gordan St

Darby St

Kaiser Rd

Nottingham St

NE Fullerton St

Bessinger St

Stout Ave

Fowler Rd

Magruder Rd

NE English St

Dirt Rd Around Park & Field

Chickasha Rd

Hethering Loop

Wilson St

McBride Ave

Rumple Rd

Daly Rd

NE Dove Ln

Lester Rd

Robbins Rd

Hatch Rd

Shelly Rd

Driveway for Water Treat Fac

Kilbreth Pl

Silcott Pl

Rucker Rd

Howitzer Trl

Back Access Rd

Howitzer Trl

Boundary Rd

US Hwy 277

Rothwell St

Back Access Rd

Back Access Rd

Corral Rd

Quinette Rd

US Hwy 62

Tucker Rd

Berry St

Macomb Rd

Rothwell St

Macomb Rd

277,287.1

280,548.8

277,956.8

281,046.7

277,061.3

277,062.3

276,810.5

279,252.6

281,924.9 282,204.5

281,737.3

276,544.2

276,320.5

271,246

273,471.3

275,732.7

273,129.7

271,844.4

271,415.7

270,986.3

268,925.4

269,276.7

282,962.4

267,432.6

284,514

265,584

282,668.6

265,845.1

283,865.8

264,978.6

264,577.3

264,016.5

263,753.9

261,031.1

259,482.2

257,659.7

256,862.3

256,054.6

250,566.5

249,890.6

249,313

244,349.1

248,961.4

98°21'0"W 98°21'45"W 98°22'30"W

34°42'0"N

98°22'30"W

98°21'45"W

98°21'0"W

98°23'15"W

34°41'30"N 34°41'0"N 34°40'30"N 34°40'0"N 34°39'30"N 34°39'0"N 34°38'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4–5. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’ Figure 4-5. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
38 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,080

1,100

1,120

1,060

1,140

1,160

1,180

1,100

1,080

1,100

1,140

1,120

1,120

1,140

1,100

1,080

1,100

1,120

1,080

1,100

1,160

1,140

1,080

1,140

1,060

1,140

1,080

1,080

1,140

1,080

1,120

1,120

1,080

1,100

1,100

1,140

1,080

1,080

1,080

1,080

1,140

1,080

1,080

1,120

1,100

1,180

1,080

1,100

1,100

1,100

1,080

1,120

1,100

1,100

1,060

1,120

1,120

1,140

1,080

1,120

1,140

1,120

1,120

1,120

1,080

1,140

1,120

1,080

1,100

1,120

1,120

1,160

1,100

1,080

1,080

1,100

1,120

1,140

1,120

1,140

1,120

1,100

1,080

1,080

1,100

1,100

1,140

1,080

1,100

1,120

1,140

1,080

1,100

1,120

1,140

1,120

1,140

1,080

1,120

1,120

1,080

1,120

1,120

1,100

1,100

1,100

1,140

1,080

1,060

1,120

1,100

1,120

1,120

1,080

1,100

1,100

1,080

1,100

1,140

1,080

1,100

1,140

1,080

1,120

1,120

1,100

1,080

1,080

1,120

1,080

1,140

1,080

1,140

1,120

1,080

1,080

1,100

1,080

1,080

1,120

1,080

1,100 1,080

1,080

1,080

1,080

1,120

1,100

1,120

1,140

§ ̈¦44

£¤281B

£¤62

Lawton

I- 44

US Hwy 277

US Hwy 281

H E Bailey Tpke

US Hwy 62 NE Rogers Ln

Stallings Rd

E Gore Blvd

Pioneer Expy

NE Lawrie Tatum Rd

NE 15th St

NE Flower Mound Rd

E Cache Creek Rd

NW 2nd St US Hwy 281 Bus

Post Rd

NE Cache Rd

S Boundary Rd

Geronimo Rd

Indian Trail Rd

Boundary Rd

S Boundary

Rothwell St

Gruber Rd

Sheridan Rd

Howitzer Trl

NW 1st St

Corral Rd

NW 4th St

Ott Rd

NW 3rd St

SW 2nd St

NE 20th St

SE 8th St

SW D Ave

NE 25th St

Honeycutt Rd

N Railroad St S Railroad St

Navea Rd

SE F Ave

NW Rogers Ln

SW A Ave

Grebel Rd

SW E Ave

W Gore Blvd

Greber Rd

NE Village Dr

SW C Ave

Perez Rd

Conklin Rd

SE Larrance St

NW Cache Rd

Philippe Rd

SW Gore Blvd

NW Ferris Ave

SW 4th St

Francis St

NE Cimarron Trl

NE Angus St

NE Pioneer Blvd

Randolph Rd

SW B Ave SE B Ave

SE D Ave

SW F Ave

NE Dunlop St

Harry Rd

SE Interstate Dr

Edwards St

NE 26th St

Suell Rd

NW Columbia Ave

SE 6th St

SE 7th St

NW Mission Blvd

SW 3rd St

Russbach Rd

SE Flower Mound Rd

NE 9th St

Rossbach Rd

NE Lake Ave

4th St

NE Babbit St

Berry St

NE Euclid Ave

NE 27th St

Greble Rd

NW Woodridge Dr

Tucker Rd

NE Carver St

NE Garden Ln

NE Bell Ave

NW Mimosa Ln

Gordan St

Darby St

NW Glendale Dr

Nottingham St

NE Fullerton St

SE 4th St

Bessinger St

NE Heritage Dr

NE English St

NE Heritage Ln

NE Larrance St

NE Heritage Creek Dr

Rumple Rd

NW 6th St

NE Dove Ln

NE 29th St

Mockingbird Rd

NE Skyline Cir

NE Euclid Dr

Angus Cir

NE Maine St

SE Surrey Pl

NE Bob White Rd

NE Bellevue Cir

Silcott Pl

Silcott Cir

NE Carver St

SW Gore Blvd

NE 25th St

W Gore Blvd

SW F Ave

Corral Rd

Rothwell St

Howitzer Trl

Rossbach Rd

Tucker Rd

Rothwell St

NW Rogers Ln

Boundary Rd

Berry St

SE D Ave

Pioneer Expy

265,584

238,170

231,595.9 232,747.5

236,555.3

267,432.6

237,019.3

230,598.3

259,482.2

261,031.1

264,978.6

238,795.7

257,659.7

264,577.3

256,054.6

243,785.7

264,016.5

241,768

237,339.5

263,753.9

228,962.7

228,601.7

265,845.1

227,661.4

247,389

228,176.4

256,862.3

242,954.9

251,795.2

271,246

249,313

227,118.3

268,925.4

250,566.5

242,242.3

239,225.1

244,349.1

241,539.7

229,440.7

269,276.7

248,663.2

245,194.4

270,986.3

248,961.4

249,890.6

273,471.3

271,844.4

249,543.1

276,320.5

276,544.2

276,810.5

275,732.7

277,287.1

277,061.3 277,062.3

277,956.8

279,252.6

98°21'45"W

98°22'30"W

98°23'15"W

34°40'0"N 34°39'30"N 34°39'0"N 34°38'30"N 34°38'0"N 34°37'30"N 34°37'0"N 34°36'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-6. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–6. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 4 39

1,060

1,040

1,080

1,100

1,120

1,140

1,100

1,080

1,080

1,060

1,060

1,060

1,060

1,080

1,060

1,060

1,060

1,060

1,120

1,080

1,100

1,120

1,120

1,100

1,080

1,120

1,100

1,040

1,060

1,080

1,080

1,100

1,060

1,080

1,100

1,080

1,060

1,100

1,080

1,060

1,080

1,060

1,120

1,120

1,100

1,080

1,100

1,060

1,080

1,120

1,060

1,120

1,120

1,080

1,060

1,080

1,120

1,060

1,040

1,100

1,100

1,040

1,120

1,060

1,060

1,120

1,060

1,060

1,120

1,080

1,100

1,080

1,080

1,080

1,060

1,120

1,100

1,080

1,060

1,100

1,060

1,060

1,060

1,060

1,080

1,060

1,080

1,080

1,120

1,100

1,100

1,100

1,060

1,100

§ ̈¦44

UV7

£¤281B

Lawton

I- 44 US Hwy 277 US Hwy 281

Pioneer Expy

H E Bailey Tpke

S Railroad St

State Hwy 7

SE 15th St

SE Lee Blvd

SW 6th St

SE Bishop Rd

US Hwy 281 Bus SW 2nd St

SW 4th St

SW 11th St

SW 5th St

SE Coombs Rd

SE 1st St

SE Tower Rd

SE 8th St

SW Bishop Rd

SW I Ave

SW Coombs Rd

E Gore Blvd

SW 3rd St

SW 7th St

SW H Ave

SW Lee Blvd

SE 2nd St

SW D Ave

SE Interstate Dr

SE H Ave

SW E Ave

SE Skyline Dr

SW Belmont Ave

SE F Ave

SW A Ave

SW C Ave

SW F Ave

SW Grand Ave

SW G Ave

SW Park Ave

SE Larrance St

NW 3rd St

SE J Ave

W Gore Blvd

SW Highland Ave

NW 2nd St

SW Summit Ave

NW 1st St

SW Magnolia Ave

SW B Ave

SW Gore Blvd

SW Douglas Ave

SE B Ave

SE D Ave

SW Monroe Ave

SE Flower Mound Rd

SE 6th St

SE 7th St

SW 1st St

SW Jefferson Ave

SE Wallock St

SE Park Ave

SW Garfield Ave

SW 8th St

SW Texas Ave

SE I Ave

SE Simpson St

N Railroad St

Sharps Ln

NE Bell Ave

SW Sedalia Ave

SW McKinley Ave

SE 4th St

SW Arbuckle Ave

4th St E

King

SW Roosevelt Ave

SE 135th St

SE Stafford St

SW 10th St

SW Abilene Dr

Main St

SW J Ave

SW Overland Dr

NE Arlington Dr

SE Monroe Ave

SW Butterfield Dr

SW Sedalia Pl

Pioneer Expy

SW E Ave

US Hwy 281 Bus

US Hwy 277

SE I Ave

SW 3rd St

H E Bailey Tpke

SW 3rd St

SW F Ave

W Gore Blvd

SW 4th St

US Hwy 277

SW 6th St

SW C Ave

SW 5th St

US Hwy 281

SW G Ave

SE D Ave

I- 44

S Railroad St

202,037

218,567

206,365.9

207,647.8

205,255.5

225,035.9

207,532.2

207,386.2

223,887.6

199,233.3

221,849.7

221,444.5

208,488.3

219,489.5

220,619.2

220,955.3

226,157.6

196,556.4

203,233.8

195,820.1

223,049.6

200,771.3

207,841.1

223,473.4

223,274.7

210,476.2

225,439.7

212,634.5

224,652.6

217,835.3

216,742.7

211,410.2

227,661.4

213,433.2

214,111.8

227,118.3

214,945.9

216,072.3

194,930.1

215,374.7

215,227.7

215,092.2

228,176.4

193,653.9

228,601.7

191,861.5

228,962.7

98°21'0"W 98°21'45"W

34°36'30"N

98°21'45"W

98°21'0"W

98°22'30"W

98°23'15"W

34°36'0"N 34°35'30"N 34°35'0"N 34°34'30"N 34°33'30"N 34°33'0"N 34°32'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-7. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–7. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
40 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

1,040

1,060

1,020

1,080

1,100

1,120

1,140

1,160

1,180

1,060

1,040

1,040

1,060

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,060

1,080

1,040

1,080

1,040

1,040

1,040

1,040

1,080

1,040

1,060

1,060

1,040

1,080

1,040

1,040

1,020

1,040

1,040

1,020

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,040

1,020

1,060

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,080

1,020

1,100

1,080

1,040

1,020

1,080

1,040

1,040

1,040

1,040

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,020

1,040

1,060

1,060

1,060

1,060

1,040

1,020

1,080

1,040

1,020

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

§ ̈¦44

£¤281B

Lawton

Lawton

S Railroad St

SE 15th St

I- 44

SE Tinney Rd

SW 11th St

US Hwy 277

SE Pecan Dr

US Hwy 281

Srailroad St

Pioneer Expy

H E Bailey Tpke

SW Tinney Rd

SE Base Line Rd

SE Flower Mound Rd

SE Goodin Rd

SE 135th St

S 11th St

US Hwy 281A Baseline

N2580 Rd

E1740 Rd

SE Baseline Rd

Goodin Rd

SE Goodin RdSE Pecan Dr

I- 44

177,474

191,049

179,479.6

182,271.7

181,016.6

180,665.8

190,088.3

177,361.5

177,076.1

189,562.5

188,764.9

186,263.8

187,633.2

191,861.5

202,037

185,580.1

175,752.7

184,132.9

175,169.8

172,347.6

183,159.9

193,653.9

164,251.1

171,129.6

164,581.6

168,408.2

161,814.8

168,318.2

199,233.3

164,709.6

159,392.6

196,556.4

165,167.9

195,820.1

200,771.3

194,930.1

159,070.8

169,522.3

168,654.6

168,560.8

158,391.3

205,255.5

203,233.8

155,185.6

153,714.8

206,365.9

152,097.6

207,386.2

98°21'45"W 98°21'0"W

34°33'30"N

98°22'30"W

98°23'15"W

98°24'0"W

98°24'45"W

34°33'30"N 34°33'0"N 34°32'30"N 34°32'0"N 34°31'30"N 34°30'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-8. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–8. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 4 41

1,000

1,020

1,040

1,060

1,080

1,020

1,020

1,020 1,020

1,020

1,060

1,020

1,000

1,020

1,020

1,040

1,020

1,000

1,080

1,000

1,000

1,000

1,020

1,040

1,020

1,040

1,040

1,000

1,020

1,020

1,060

1,000

1,020

1,000

1,020

1,020

1,000

1,020

1,020

1,020

1,040

1,040

1,020

1,040

1,020

1,060

1,000

1,000

1,040

1,020

1,020

1,000

1,000

1,060

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,020

1,080

1,020

1,080

1,020

1,020

1,040

1,060

1,000

1,020

1,040

1,020

1,040

1,020

1,040

1,040

1,060

1,060

1,000

1,000

1,000

1,060

1,020

1,020

1,000

1,000

1,060

1,040

1,000

1,000

1,060

1,040

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,040

1,020

1,040

1,080

1,020

1,000

1,060

1,020

1,000

1,020

1,020

1,000

1,020

1,040

1,020

1,040

1,020

1,060

1,020

1,020

Geronimo

E1770 Rd

Co Rd E1770

Co Rd N2600

SE Logue Chapel Rd

Devine Rd

E1750 Rd

E1770 Rd

N2610 Rd

Co Rd E1770

N2600 Rd

SE Devine Rd

SE New Hope Rd

SE Burk Rd

SE Flowermound Rd

SE 45th Rd

Osage St

E1760 Rd

SE Baseline Rd

SE Base Line Rd

E1750 New Hope

E1740 Rd

SE Holiday Rd

SE Devine Rd

SE New Hope Rd

SE Devine Rd

SE New Hope Rd

150,072

142,877.6

137,438

142,324.4

140,508.8

140,353.6

114,397.3

109,789.2

119,497.3

138,272.6

143,853.8

118,361.6

113,022.2

140,112.9

118,964.1

98,636

152,097.6

146,761.8

100,311.7

131,416.9

106,145.6

132,727.3

136,248.1

104,166.2

134,168.4

153,714.8

99,027.5

129,845.5

98,871.9

135,606.2

123,970.8

121,198.7

131,726.3

131,559.8

133,113.1

135,039.8

132,195.2

152,975.3

133,599.3

99,268.8

96,645.5

102,608.9

155,185.6

158,391.3

159,392.6

159,070.8

95,100.6

161,814.8

98°21'0"W

98°21'45"W

98°22'30"W

34°30'30"N 34°30'0"N 34°29'30"N 34°29'0"N 34°28'30"N 34°28'0"N 34°27'30"N 34°27'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-9. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–9. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
42 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

980

1,000

1,020

960

1,040

1,060

980

1,000

1,060

980

1,000

980

980

1,020

1,040

980

1,000

1,020

980

1,000

980

1,000

1,020

1,000

1,020

1,000

1,000

1,000

1,020

1,000

980

980

1,000

1,000

1,060

980

1,040

980

980

1,000

980

980

980

1,020

980

1,060

1,040

1,020

980

1,020

980

1,000

980

1,000

980

980

980

1,000

980

1,000

1,060

980

980

1,000

980

1,020

980

980

980

1,060

1,020

980

980

1,020

980

1,060

1,060

980

1,000

980

1,020

980 980

980

980

1,040

980

1,000

980

980

1,000

1,000

1,040

980

980

980

1,000

980

980

1,040

980

980

1,000

980 1,000

1,060

1,000

980

1,060

1,060

980

1,000

1,040

1,020

980

1,020

980

1,040

1,000

1,000

980

1,040

980

1,000

980

980

1,020

1,000

980

980

Co Rd N2600

E1770 Rd

Co Rd N2620

Co Rd E1770

Co Rd N2610

Co Rd E1810

Co Rd E1790

Co Rd E1780

Co Rd E1800

SE Logue Chapel Rd

Co Rd E1790

Co Rd E1810

SE Logue Chapel Rd

Co Rd E1780

E1770 Rd Co Rd E1770

53,978.4

56,964.5

59,898

46,952.8

52,770.5

71,796.3

48,384.8

50,719.5

49,468.2

98,636

77,329.9

42,846.7

63,911.6

65,331.5

74,567.5

76,713.3

62,381.6

79,177.1 78,179.7

99,027.5

41,670.7 41,521.6

89,566.6

80,669.9

99,268.8

88,078.1

84,743.6

96,645.5

86,554.3

95,100.6

93,656.1

81,690.7

91,941.4

82,320.1

83,567.3

100,311.7

98°18'45"W

98°19'30"W

98°20'15"W

34°27'0"N 34°26'30"N 34°26'0"N 34°25'30"N 34°25'0"N 34°24'30"N 34°24'0"N 34°23'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4-10. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 4–10. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
Appendix 4 43

#

960

980

1,000

940

1,020

980

980

940

960

980

980

980

960

980

960

960

960

980

960

940

980

980

980

980

980

940

960

1,000

960

980

960

980

980

960

980

980

980

960

980

980

1,020

1,020

980

1,000

960

980

980

980

980

960

1,000

980

1,000

980

960

960

960

980

980

980

1,000

980

980

980

960

1,000

980

980

980

960

980

960

980

980

940

960

980

980

960

1,000

960

960

960

960

960

980

980

960

960

960

960

980

980

980

1,000

1,000 1,020

1,000

1,000

980

980

980

980

1,000

980

980

980

980

960

1,000

960

980

UV53

UV5

Walters

07311000

Hwy 53

Co Rd N2610

Co Rd N2620

Co Rd E1820

Co Rd N2640

Indian Hwy

Co Rd N2630

Co Rd N2622

N 1st St

N 3rd St

Co Rd N2650

N 2nd St

Co Rd E1840

N 5th St

E Missouri Ave

S 1st St

E Iowa Ave

Co Rd D1825

N 6th St

E Nevada Ave

E Kansas Ave

S 3rd St

Co Rd E1810

N 7th St

N 9th St

E Oklahoma Ave

N Broadway St

W Missouri Ave

E Boston Ave

S 5th St

W Colorado Ave

S 2nd St

E Washington Ave

E Texas Ave

W Iowa Ave

S Central Ave

S 6th St

E Indiana Ave

S 7th St

S Broadway St

W Kansas Ave

E Arlington Ave

Lauren Ln

W Arlington Ave

E Cleveland Ave

S 8th St

S Ross St

Co Rd N2630

Co Rd E1820

Dave Boyer Lake

25,330.3

30,362.4

26,836.6

41,286.4

32,210.9

41,413.9

34,847.6

15,792.2

34,287.9

41,521.6

15,917.9

33,393.4

15,628.5

23,747.6

15,408.5

41,670.7

13,673.5

13,254.9

22,740.7

11,502.5

15,278.3

7,256.1

42,846.7

16,963.7

17,976.7

46,952.8

17,490.3

20,671.9

18,660.1

19,293.3

20,059.4

48,384.8

49,468.2

98°19'30"W 98°18'45"W 98°18'0"W 98°17'15"W 98°16'30"W 98°15'45"W

34°22'30"N

34°23'0"N

34°23'30"N

34°24'0"N

98°20'15"W

34°23'0"N 34°22'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Lake

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Bridge

Railroad

Cross section

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Lawton

Walters

Lake Lawtonka

¢

Figure 4–11. Cross-section locations for Lake Lawtonka, near Lawton, Oklahoma, for the Hydrologic Engineering Center’ Figure 4-11. Cross-section locations for Lake Lawtonka for the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).
44 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma
Appendix 5 Appendix 5 45

#0

!

!

!

!

!

!

!

!

LAWTON WTP

LAWTON WTP

LAKELAND WWT

MEDICINE PARK WWT

Jack Laughter Park

Medicine Park City Hall

James Arthur Manning State Fish Hatchery

1,360

1,340

1,320

1,280

1,260

1,380

1,300

1,400

1,420

1,440

1,460

1,480

1,500

1,240

1,520

1,540

1,560

1,580

1,400

1,300

1,520

1,480

1,420

1,380

1,380

1,300

1,400

1,480

1,520

1,400

1,420

1,460

1,380

1,540

1,440

1,400

1,500

1,280

1,440

1,400

1,320

1,500

1,280

1,500

1,420

1,440

1,380

1,440

1,360

1,400

1,500

1,460

1,400

1,420

1,340

1,300

1,500

1,340

1,320

1,400

1,380

1,440

1,500

1,460

1,480

1,400

1,380

1,440

1,300

1,360

1,300

1,480

1,360

1,460

1,380

1,380

1,440

1,400

UV58

UV49

2:36

2:21

Medicine Park

07309500

State Hwy 58

State Hwy 49

State Hwy 49 Scn

Forest Ave

Big Rock Rd

NW Meers Porter Hill

1st

Vista Ln

Miller Rd

NW Chibitty Rd

Tackle Box Rd State Hwy 157

W Lake Dr

NW Wolf Rd

E Lake Dr

NW Hillary Rd

NW McIntosh Rd

Deer Creek

Reed Rd

Park Rd

Robinson Rd

NW Burr Oak Dr

Cox Rd

Lake Rd

NW Miller Rd

McClung Rd

Lakeview Pl

Rhoades Rd

Sharon Rd

Eagle Mountain Rd

Lawtonka Rd

N Lake Dr

Lost Bridge Rd

Deer Creek Canyon Rd

Juniper Ln

Mae Ave

Lakeview Dr

NW Eagle Mountain Rd

Vine St

Meers Porter Hill Rd

Ranch Dr

Gray Hawk Dr

Brian Pl

Elake Dr

NW Tackle Box Rd

Ironpin Cr

Pvo Rd

Wahnetah Ln

E Lake Dr

1st

1st

W Lake Dr

1st

E Lake Dr

Miller Rd

E Lake Dr

Lake Lawtonka

Elmer Thomas Lake

348,959.2

2:25

98°31'30"W 98°30'45"W 98°30'0"W 98°29'15"W 98°28'30"W 98°27'45"W

34°46'30"N

34°47'0"N

34°47'30"N

34°48'0"N

98°32'15"W

98°33'45"W

34°47'30"N 34°47'0"N 34°46'30"N 34°46'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-1. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 5–1. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
46 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

#0

!

!

!

!

!

!

!

LAWTON WTP

LAWTON WTP

MEDICINE PARK WWT

Jack Laughter Park

FT SILL LETRA BEACH WWT

Medicine Park City Hall

James Arthur Manning State Fish Hatchery

1,320

1,280

1,340

1,240

1,260

1,300

1,220

1,360

1,380

1,400

1,420

1,440

1,200

1,460

1,500

1,480

1,520

1,540

1,560

1,580

1,600

1,620

1,640

1,300

1,400

1,480

1,400

1,360

1,340

1,380

1,360

1,480

1,240

1,380

1,500

1,380

1,400

1,240

1,440

1,440

1,280

1,560

1,360

1,500

1,460

1,480

1,280

1,240

1,480

1,460

1,360

1,360

1,560

1,480

1,360

1,440

1,300

1,460

1,380

1,240

1,440

1,460

1,320

1,340

1,560

1,480

1,320

1,360

1,420

1,460

1,400

1,440

1,440

1,400

1,480

1,580

1,320

1,520

1,560

1,400

1,380

1,520

1,300

1,460

1,260

1,460

1,420

1,540

1,520

1,280

1,540

1,460

1,300

1,560

1,300

1,480

1,340

1,300

1,240

1,600

1,380

1,400

1,240

1,400

1,500

1,320

1,320

1,360

1,400

1,380

1,320

1,340

1,420

1,380

1,280

1,440

1,260

1,300

1,420

1,380

1,520

1,380

1,400

1,380

1,400

1,540

1,420

1,260

1,520

1,520

1,440

1,360

1,320

1,240

1,520

1,500

1,400

1,200

1,440

1,380

1,520

1,500

1,500

1,320

1,260

1,600

1,420

1,220

1,400

1,400

1,360

1,320

1,300

1,400

1,440

1,520

1,440

1,360

1,420

1,380

1,560

1,240

1,420

1,540

1,540

1,480

1,220

1,420

1,500

1,460

1,260

1,320

1,440

1,260

1,380

1,380

1,400

1,220

1,280

1,360

1,340

1,300

1,260

1,400

1,280

1,420

1,320

1,260

1,580

1,400

1,280

1,440

1,340

1,240

1,540

1,520

1,300

1,240

1,280

1,340

1,340

1,260

1,420

1,360

1,380

1,420

1,240

UV49

UV58

2:36

2:21

2:25

Medicine Park

07309500 State Hwy 49

N Boundary Rd

State Hwy 49 Scn

Forest Ave

1st

Big Rock Rd

4 Mile Rd

Rocky Twins Rd

Brush Canyon Rd

State Hwy 58

Deer Creek Canyon Rd

W Lake Dr

E Lake Dr

Mount Hinds 1280 Rd

Deer Creek

E Elm St

Punch Bowl Rd

N Lake Dr

Vine St

Brian Pl

Rex Heath Dr

Elake Dr

NW Tackle Box Rd

Tjmber Creek Dr

E Lake Rd

1st

W Lake Dr

1st

E Lake Dr

E Lake Dr

Punch Bowl Rd

E Lake Dr

1st

E Lake Dr

Lake Lawtonka

Elmer Thomas Lake

316,964.8

327,741.9

306,752

98°30'0"W 98°29'15"W 98°28'30"W 98°27'45"W 98°27'0"W 98°26'15"W

34°43'30"N

34°44'0"N

34°44'30"N

34°45'0"N

98°30'45"W

98°31'30"W

34°45'0"N 34°44'30"N 34°44'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-2. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–2. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 5 47

!

!

Heyls Hole

Rumbough Pond

1,220

1,200

1,240

1,180 1,260

1,160

1,280

1,300

1,340

1,360

1,320

1,380

1,400

1,420

1,440

1,460

1,480

1,500

1,520

1,540

1,560

1,300

1,480

1,280

1,340

1,460

1,280

1,380

1,160

1,240

1,200

1,420

1,280

1,340

1,260

1,320

1,280

1,240

1,180

1,400

1,240

1,220

1,220

1,200

1,220

1,320

1,320

1,160

1,540

1,260

1,280

1,240

1,240

1,260

1,200

1,500

1,300

1,160

1,260

1,200

1,180

1,200

1,340

1,200

1,240

1,260

1,240

1,260

1,180

1,260

1,520

1,260

1,240

1,200

1,220

1,220

1,320

1,220

1,440

1,300

1,220

1,280

1,280

1,200

1,180

1,200

1,240

1,360

1,220

1,220

1,240

1,280

1,240

1,280

1,440

1,260

1,360

1,420

1,480

1,260

1,540

1,260

1,200

1,320

1,380

1,260

1,200

1,220

1,260

1,200

1,240

1,220

1,260

1,260

1,180

UV49

Medicine Park

State Hwy 49

N Boundary Rd

State Hwy 49 Scn

Tower Two Rd

Punch Bowl Rd

Signal Mountain Rd

Rocky Twins Rd

4 Mile Rd

Artillery Ridge Rd

Hand Rd

Mount Hinds 1280 Rd

Quanahs Rd

Mount Hinds Rd

Ketch Creek Dr

Wildwood Rd

Autumn Dr

Cara Rd

Landmark Rd

Mt Scott Rd

S Autumn Ln

Tower Two Rd

State Hwy 49

Cara Rd

State Hwy 49 Scn

306,752

316,964.8

98°24'45"W 98°25'30"W 98°26'15"W

34°43'30"N

34°44'0"N

98°26'15"W

98°25'30"W

98°24'45"W

98°27'0"W

34°43'0"N 34°42'30"N 34°42'0"N 34°41'0"N 34°40'30"N 34°40'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-3. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 5–3. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
48 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

!

!

!

!

!

!

!

!

!

Heyls Hole

Nye Library

Rucker Park

Butner Field

Rumbough Pond

Medicine Bluff

Pritchard Field

M. Songbird Mangement Area

1,180

1,160

1,140

1,220

1,200

1,120

1,240

1,100

1,260

1,280

1,300

1,320 1,340

1,360

1,380

1,400

1,420

1,480

1,180

1,120

1,200

1,100

1,200

1,180

1,180

1,120

1,340

1,200

1,320

1,220

1,140

1,240

1,240

1,280

1,120

1,260

1,120

1,220

1,200

1,200

1,220

1,240

1,280

1,120

1,160

1,220

1,320

1,280

1,240

1,240

1,220

1,120

1,180

1,240

1,160

1,320

1,180

1,120

1,280

1,300

1,260

1,140

1,200

1,160

1,160

1,160

1,160

1,140

1,280

1,120

1,280

1,260

1,300

1,160

1,240

1,280

1,260

1,120

1,160

1,320

1,240

1,220

1,240

1,160

1,220

1,260

1,220

1,140

1,200

1,220

1,120

1,120

1,140

1,200

1,260

1,280

1,160

1,220

1,260

1,260

1,120

1,160

1,240

1,200

1,120

1,260

1,300

1,220

1,180

1,120

1,280

1,180

1,260

1,180

1,180

1,180

1,120

1,120

1,240

1,120

1,180

1,120

1,340

1,160

1,200

1,300

1,180

1,260

1,300

1,320

1,140

1,200

1,240

1,140

1,200

1,120

1,200

1,240

1,220

1,160

1,140

1,120

1,260

1,240

1,120

1,160

1,180

1,140

1,140

1,120

1,140

7:25

§ ̈¦44

6:47

8:09

8:16

Medicine Park

I- 44

Randolph Rd

Chatto Rd

Punch Bowl Rd

N Boundary Rd

Upton Rd

US Hwy 62

Fort Sill Blvd

Sheridan Rd

US Hwy 277 US Hwy 281

Currie Rd

Craig Rd

Knob Hill Rd

Apache Gate Rd

King Rd

Rocky Twins Rd

Artillery Ridge Rd

Condon Rd

Quinette Rd

Bateman Rd

Hoskins Rd

Macomb Rd

Hand Rd

Austin Rd

Howitzer Trl

Lawson Rd

Elgin Rd

Lee Rd

Jones Rd

Lester Rd

Bob Pennell Rd

Adams Rd

Back Access Rd

McNair Rd

Lauman Ave

Burrill Rd

Barbour Rd

Batson Ave

Hunt Rd

Leever Ave

Myers Rd

Terry Loop

Tyner Rd

Manley Rd

Evans Rd

Hamilton Rd

Davidson Rd

Magruder Rd

Rucker Rd

Maury Rd

Marcy Rd

Stout Ave

Isbell Rd

Mount Hinds Rd

Turner Rd

Hethering Loop

McBride Ave

Daly Rd

Bonner Rd

Montague

Conner Rd

Harvey Rd

Shanklin Cir

Myers Pl

Harper

Cruikshank Circulo

Hunt Rd

Rucker Rd

Apache Gate Rd

Macomb Rd

I- 44

Craig Rd

Back Access Rd

Currie Rd

Apache Gate Rd

Back Access Rd

Macomb Rd

Barbour Rd

Back Access Rd

306,752

285,317.4

295,868.4

98°25'30"W 98°24'45"W 98°24'0"W 98°23'15"W

34°42'0"N

34°42'30"N

34°43'0"N

34°43'30"N

98°26'15"W

98°27'0"W

98°27'45"W

34°43'30"N 34°41'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-4. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a)

Figure 5–4. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 5 49

!

!

!

!

!

!

!

!

!

!

!

FT SILL WWT

Nye Library

Rucker Park

Butner Field

Panther Park

Ambrosia Park

GERONIMO ROAD ES

M. Songbird Mangement Area

1,100

1,140

1,120

1,160

1,080

1,180

1,200

1,120

1,160

1,120

1,120

1,100

1,120

1,180

1,120

1,120

1,160

1,100

1,120

1,100

1,180

1,180

1,120

1,120

1,100

1,120

1,120

1,120

1,120

1,120

1,140

1,120

1,120

1,120

1,120

1,140

1,140

1,120

1,160

1,120

1,140

1,120

1,120

1,100

1,100

1,100

1,120

1,120

1,100

1,080

1,120

1,120

1,140

1,120

1,120

1,160

1,120

1,100

1,140

1,120

1,120

1,140

1,100

1,120

1,120

1,180

1,140

1,160

1,120

1,120

1,120

1,120

1,140

1,100

1,120

1,160

1,160

1,120

1,100

1,100

1,120

1,120

1,080

1,120

1,120

1,140

1,180

1,120

1,120

1,100

1,120

1,120

1,120

1,120

1,120

1,120

1,120

1,180

1,120

1,140

1,120

1,160

1,100

§ ̈¦44

£¤62

8:09

8:16

7:25

8:44

9:46

Lawton

I- 44

US Hwy 62

Fort Sill Blvd

US Hwy 281US Hwy 277

Elgin Rd

H E Bailey Tpke

Beef Creek Rd

Post Rd

Randolph Rd

Bald Ridge Rd

Geronimo Rd

Sheridan Rd

Condon Rd

Stallings Rd

Dodge Hill Rd

Bragg Rd

Corral Rd

Chatto Rd

Boundary Rd

S Boundary

Rothwell St

Quinette Rd

Upton Rd

Gruber Rd

Howitzer Trl

Knob Hill Rd

Hoskins Rd

Ott Rd

E Cache Creek Rd

King Rd

Macomb Rd

Mow-Way Rd

Honeycutt Rd

Blair Rd

Thomas St

NW Rogers Ln

Ringold Rd

Navea Rd

Grebel Rd

Greber Rd

Knox Rd

Perez Rd

Conklin Rd

Hamilton Rd

Philippe Rd

Rossbach Rd

Francis St

NE Cimarron Trl

NE Angus St

McNair Rd

Cache Creek Rd

NE Pioneer Blvd

Lauman Ave

Burrill Rd

Peden Rd

Fergusson Rd

Harry Rd

Batson Ave

Edwards St

Leever Ave

Suell Rd

Treat

Back Access Rd

Ganahl Rd

Manley Rd

Havron Rd

Rutledge Rd

Hammel Rd

NE Babbit St

Wolfe Rd

Berry St

Lee Rd

Austin Rd

Greble Rd

Bob Pennell Rd

Rucker Rd

Tucker Rd

Kinzel Rd

Follett Rd

NE 9th St

Gordan St

Darby St

Kaiser Rd

Nottingham St

NE Fullerton St

Bessinger St

Stout Ave

Fowler Rd

Magruder Rd

NE English St

Dirt Rd Around Park & Field

Chickasha Rd

Hethering Loop

Wilson St

McBride Ave

Rumple Rd

Daly Rd

NE Dove Ln

Lester Rd

Robbins Rd

Angus Cir

Hatch Rd

Shelly Rd

Kilbreth Pl

Silcott Pl

Rucker Rd

Howitzer Trl

Howitzer Trl

Boundary Rd

US Hwy 277

Rothwell St

Back Access Rd

Corral Rd

Quinette Rd

US Hwy 62

Tucker Rd

Berry St

Macomb Rd

Rothwell St

273,471.3

264,016.5

98°21'0"W 98°21'45"W 98°22'30"W

34°42'0"N

98°22'30"W

98°21'45"W

98°21'0"W

98°23'15"W

34°41'30"N 34°41'0"N 34°40'30"N 34°40'0"N 34°39'30"N 34°39'0"N 34°38'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-5. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–5. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
50 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

! !

!

!

!

!

!

!

!

!

!

Lake Helen

FT SILL WWT

Panther Park

O H Arnold Park

Veterans Center

GERONIMO ROAD ES

Charlie Ray Park

ElmerThomas Park

Lawton Indian Hospital

Comanche Nation Gaming Comm

1,080

1,100

1,120

1,060

1,140

1,160

1,180

1,100

1,080

1,100

1,140

1,120

1,120

1,140

1,100

1,080

1,100

1,120

1,080

1,160

1,140

1,080

1,140

1,060

1,140

1,080

1,080

1,140

1,080

1,120

1,080

1,100

1,100

1,140

1,080

1,080

1,080

1,080

1,140

1,080

1,080

1,120

1,100

1,180

1,080

1,100

1,100

1,100

1,080

1,120

1,100

1,100

1,060

1,120

1,120

1,140

1,080

1,120

1,140

1,120

1,120

1,120

1,080

1,140

1,120

1,080

1,100

1,120

1,160

1,100

1,080

1,080

1,100

1,140

1,120

1,140

1,120

1,100

1,080

1,080

1,100

1,100

1,140

1,080

1,100

1,120

1,140

1,080

1,100

1,120

1,140

1,120

1,140

1,080

1,120

1,120

1,080

1,120

1,120

1,100

1,100

1,100

1,140

1,080

1,060

1,120

1,100

1,120

1,120

1,080

1,120

1,100

1,100

1,080

1,100

1,140

1,080

1,100

1,140

1,080

1,120

1,120

1,100

1,080

1,080

1,120

1,080

1,140

1,080

1,140

1,120

1,080

1,080

1,080

1,080

1,120

1,080

1,100 1,080

1,080

1,080

1,080

1,120

1,100

1,120

§ ̈¦44

£¤281B

£¤62

10:31

9:46

8:09

8:16

8:44

Lawton

I- 44

US Hwy 277

US Hwy 281

H E Bailey Tpke

US Hwy 62 NE Rogers Ln

Stallings Rd

E Gore Blvd

Pioneer Expy

NE Lawrie Tatum Rd

NE 15th St

NE Flower Mound Rd

E Cache Creek Rd

NW 2nd St US Hwy 281 Bus

Post Rd

NE Cache Rd

S Boundary Rd

Geronimo Rd

Indian Trail Rd

Boundary Rd

S Boundary

Rothwell St

Gruber Rd

Sheridan Rd

Howitzer Trl

NW 1st St

Corral Rd

NW 4th St

Ott Rd

NW 3rd St

SW 2nd St

NE 20th St

SE 8th St

SW D Ave

NE 25th St

Honeycutt Rd

N Railroad St S Railroad St

Navea Rd

SE F Ave

NW Rogers Ln

SW A Ave

Grebel Rd

SW E Ave

W Gore Blvd

Greber Rd

NE Village Dr

SW C Ave

Perez Rd

Conklin Rd

SE Larrance St

NW Cache Rd

Philippe Rd

SW Gore Blvd

NW Ferris Ave

SW 4th St

Francis St

NE Cimarron Trl

NE Angus St

NE Pioneer Blvd

Randolph Rd

SW B Ave SE B Ave

SE D Ave

SW F Ave

NE Dunlop St

Harry Rd

SE Interstate Dr

Edwards St

NE 26th St

Suell Rd

NW Columbia Ave

SE 6th St

SE 7th St

NW Mission Blvd

SW 3rd St

Russbach Rd

SE Flower Mound Rd

NE 9th St

Rossbach Rd

NE Lake Ave

4th St

NE Babbit St

Berry St

NE Euclid Ave

NE 27th St

Greble Rd

NW Woodridge Dr

Tucker Rd

NE Carver St

NE Garden Ln

NE Bell Ave

NW Mimosa Ln

Gordan St

Darby St

NW Glendale Dr

Nottingham St

NE Fullerton St

SE 4th St

Bessinger St

NE Heritage Dr

NE English St

NE Heritage Ln

NE Larrance St

NE Heritage Creek Dr

Rumple Rd

NW 6th St

NE Dove Ln

NE 29th St

Mockingbird Rd

NE Skyline Cir

NE Euclid Dr

Angus Cir

SE Surrey Pl

NE Bob White Rd

Silcott Pl

Silcott Cir

SW F Ave

W Gore Blvd

Corral Rd

NW Rogers Ln

Rothwell St

Rossbach Rd

Tucker Rd

Rothwell St

Boundary Rd

Berry St

SE D Ave

Pioneer Expy

NE Carver St

232,747.5

264,016.5

242,954.9

251,795.2

273,471.3

98°21'45"W

98°22'30"W

98°23'15"W

34°40'0"N 34°39'30"N 34°39'0"N 34°38'30"N 34°38'0"N 34°37'30"N 34°37'0"N 34°36'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-6. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–6. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 5 51

!

!

!

!

!

Veterans Center

George M Lee Park

Comanche Nation Gaming Comm

1,060

1,040

1,080

1,100

1,120

1,140

1,100

1,080

1,080

1,060

1,060

1,060

1,060

1,080

1,060

1,060

1,060

1,060

1,080

1,100

1,120

1,120

1,100

1,080

1,120

1,100

1,040

1,060

1,080

1,080

1,100

1,060

1,080

1,100

1,080

1,060

1,100

1,080

1,060

1,080

1,060

1,120

1,120

1,100

1,080

1,100

1,060

1,080

1,120

1,120

1,120

1,080

1,120

1,060

1,080

1,120

1,060

1,040

1,100

1,100

1,040

1,120

1,060

1,060

1,120

1,060

1,060

1,120

1,080

1,100

1,080

1,080

1,080

1,060

1,120

1,100

1,080

1,060

1,100

1,060

1,060

1,060

1,060

1,080

1,060

1,080

1,080

1,100

1,100

1,100

1,060

1,100

§ ̈¦44

UV7

£¤281B

11:57

10:49

11:22

10:31

Lawton

I- 44 US Hwy 277 US Hwy 281

Pioneer Expy

H E Bailey Tpke

S Railroad St

State Hwy 7

SE 15th St

SE Lee Blvd

SW 6th St

SE Bishop Rd

US Hwy 281 Bus SW 2nd St

SW 4th St

SW 11th St

SW 5th St

SE Coombs Rd

SE 1st St

SE Tower Rd

SE 8th St

SW Bishop Rd

SW I Ave

SW Coombs Rd

E Gore Blvd

SW 3rd St

SW 7th St

SW H Ave

SW Lee Blvd

SE 2nd St

SW D Ave

SE Interstate Dr

SE H Ave

SW E Ave

SE Skyline Dr

SW Belmont Ave

SE F Ave

SW A Ave

SW C Ave

SW F Ave

SW Grand Ave

SW G Ave

SW Park Ave

SE Larrance St

NW 3rd St

SE J Ave

W Gore Blvd

SW Highland Ave

NW 2nd St

SW Summit Ave

NW 1st St

SW Magnolia Ave

SW B Ave

SW Gore Blvd

SW Douglas Ave

SE B Ave

SE D Ave

SW Monroe Ave

SE Flower Mound Rd

SE 6th St

SE 7th St

SW 1st St

SW Jefferson Ave

SE Wallock St

SE Park Ave

SW Garfield Ave

SW 8th St

SW Texas Ave

SE I Ave

SE Simpson St

N Railroad St

Sharps Ln

NE Bell Ave

SW Sedalia Ave

SW McKinley Ave

SE 4th St

SW Arbuckle Ave

4th St E

King

SW Roosevelt Ave

SE 135th St

SE Stafford St

SW 10th St

SW Abilene Dr

Main St

SW J Ave

SW Overland Dr

NE Arlington Dr

SE Monroe Ave

SW Butterfield Dr

SW Sedalia Pl

Pioneer Expy

SW E Ave

US Hwy 281 Bus

US Hwy 277

SE I Ave

SW 3rd St

H E Bailey Tpke

SW 3rd St

SW F Ave

W Gore Blvd

SW 4th St

US Hwy 277

SW 6th St

SW C Ave

SW 5th St

US Hwy 281

SW G Ave

SE D Ave

I- 44

S Railroad St

221,849.7

200,771.3

211,410.2

98°21'0"W 98°21'45"W

34°36'30"N

98°21'45"W

98°21'0"W

98°22'30"W

98°23'15"W

34°36'0"N 34°35'30"N 34°35'0"N 34°34'30"N 34°33'30"N 34°33'0"N 34°32'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-7. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–7. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
52 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

!

!

!

LAWTON WWT

Lawton Correction Facility

1,040

1,060

1,020

1,080

1,100

1,120

1,140

1,160

1,180

1,060

1,040

1,040

1,060

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,060

1,080

1,040

1,080

1,040

1,040

1,040

1,040

1,080

1,040

1,060

1,060

1,040

1,080

1,040

1,040

1,020

1,040

1,040

1,020

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,040

1,020

1,060

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,080

1,020

1,100

1,080

1,040

1,020

1,080

1,040

1,040

1,040

1,040

1,040

1,080

1,040

1,040

1,040

1,040

1,040

1,040

1,040

1,020

1,040

1,060

1,060

1,060

1,060

1,040

1,020

1,080

1,040

1,020

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

1,060

1,040

1,040

1,040

§ ̈¦44

£¤281B

13:56

Lawton

Lawton

S Railroad St

SE 15th St

I- 44

SE Tinney Rd

SW 11th St

US Hwy 277

SE Pecan Dr

US Hwy 281

Srailroad St

Pioneer Expy

H E Bailey Tpke

SW Tinney Rd

SE Base Line Rd

SE Flower Mound Rd

SE Goodin Rd

SE 135th St

S 11th St

US Hwy 281A Baseline

N2580 Rd

E1740 Rd

SE Baseline Rd

Goodin Rd

SE Goodin RdSE Pecan Dr

I- 44

179,479.6

190,088.3

200,771.3

168,654.6

158,391.3

11:57

98°21'45"W 98°21'0"W

34°33'30"N

98°22'30"W

98°23'15"W

98°24'0"W

98°24'45"W

34°33'30"N 34°33'0"N 34°32'30"N 34°32'0"N 34°31'30"N 34°30'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-8. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–8. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 5 53

!

GERONIMO NORTH WWT

1,000

1,020

1,040

1,060

1,080

1,020

1,020

1,020 1,020

1,020

1,060

1,020

1,000

1,020

1,020

1,040

1,020

1,000

1,080

1,000

1,000

1,000

1,020

1,040

1,020

1,040

1,040

1,000

1,020

1,020

1,060

1,000

1,020

1,000

1,020

1,020

1,000

1,020

1,020

1,020

1,040

1,040

1,020

1,040

1,020

1,060

1,000

1,000

1,040

1,020

1,020

1,000

1,000

1,060

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,020

1,080

1,020

1,080

1,020

1,020

1,040

1,060

1,000

1,020

1,040

1,020

1,040

1,020

1,040

1,040

1,060

1,060

1,000

1,000

1,000

1,060

1,020

1,020

1,000

1,000

1,060

1,040

1,000

1,000

1,060

1,040

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,000

1,040

1,020

1,040

1,080

1,020

1,000

1,060

1,020

1,000

1,020

1,020

1,000

1,020

1,040

1,020

1,040

1,020

1,060

1,020

1,020

16:13

17:41

Geronimo

E1770 Rd

Co Rd E1770

Co Rd N2600

SE Logue Chapel Rd

Devine Rd

E1750 Rd

E1770 Rd

N2610 Rd

Co Rd E1770

N2600 Rd

SE Devine Rd

SE New Hope Rd

SE Burk Rd

SE Flowermound Rd

SE 45th Rd

Osage St

E1760 Rd

SE Baseline Rd

SE Base Line Rd

E1750 New Hope

E1740 Rd

SE Holiday Rd

SE Devine Rd

SE New Hope Rd

SE Devine Rd

137,438

114,397.3

146,761.8

106,145.6

129,845.5

158,391.3

95,100.6

98°21'0"W

98°21'45"W

98°22'30"W

34°30'30"N 34°30'0"N 34°29'30"N 34°29'0"N 34°28'30"N 34°28'0"N 34°27'30"N 34°27'0"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-9. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 5–9. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
54 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

980

1,000

1,020

960

1,040

1,060

980

1,000

1,060

980

1,000

980

980

1,020

1,040

980

1,000

1,020

980

1,000

980

1,000

1,020

1,000

1,020

1,000

1,000

1,000

1,020

1,000

980

980

1,000

1,000

1,060

980

1,040

980

980

1,000

980

980

980

1,020

980

1,060

1,040

1,020

980

1,020

980

1,000

980

1,000

980

980

980

1,000

980

1,000

1,060

980

980

1,000

980

1,020

980

980

980

1,060

1,020

980

980

1,020

980

1,060

1,060

980

1,000

980

1,020

980 980

980

980

1,040

980

1,000

980

980

1,000

1,000

1,040

980

980

980

1,000

980

980

1,040

980

980

1,000

980 1,000

1,060

1,000

980

1,060

1,060

980

1,000

1,040

1,020

980

1,020

980

1,040

1,000

1,000

980

1,040

980

1,000

980

980

1,020

1,000

980

980

17:41

21:17

Co Rd N2600

E1770 Rd

Co Rd N2620

Co Rd E1770

Co Rd N2610

Co Rd E1810

Co Rd E1790

Co Rd E1780

Co Rd E1800

SE Logue Chapel Rd

Co Rd E1790

Co Rd E1810

SE Logue Chapel Rd

Co Rd E1780

E1770 Rd Co Rd E1770

52,770.5

42,846.7

63,911.6

74,567.5

84,743.6

95,100.6

98°18'45"W

98°19'30"W

98°20'15"W

34°27'0"N 34°26'30"N 34°26'0"N 34°25'30"N 34°25'0"N 34°24'30"N 34°24'0"N 34°23'30"N

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-10. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a). Figure 5–10. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
Appendix 5 55

#

!

!

WALTERS WWT

Sulton Park

960

980

1,000

940

1,020

940

980

980

940

1,000

960

960

960

960

980

960

980

980

960

980

980

980

960

1,000

980

980

980

960

980

980

940

960

980

980

960

980

980

980

980

1,020

1,020

960

1,000

980

980

980

960

960

960

980

980

960

1,000

960

980

980

980

1,000

980

1,000

960

980

980

960

980

1,000

980

960

960

960

980

980

980

960

940

960

980

960

960

960

980

980

980

980

980

960

980

1,000

1,000

1,020

980

1,000

960

960

980

1,000

980

980

980

980

980

1,000

980

980

980

960

960

980

1,000

960

980

UV53

UV5

21:17

23:21

Walters

07311000

Hwy 53

Co Rd N2620

Co Rd N2610

Co Rd E1820

Co Rd N2640

Indian Hwy

Co Rd N2630

Co Rd N2622

N 1st St

N 3rd St

Co Rd N2650

N 2nd St

Co Rd E1840

N 5th St

E Missouri Ave

E Iowa Ave

S 1st St

Co Rd D1825

N 6th St

E Nevada Ave

E Kansas Ave

S 3rd St

Co Rd E1810

N 7th St

N 9th St

E Oklahoma Ave

N Broadway St

W Missouri Ave

E Boston Ave

S 5th St

W Colorado Ave

S 2nd St

E Washington Ave

E Texas Ave

W Iowa Ave

S Central Ave

S 6th St

E Indiana Ave

S 7th St

W Kansas Ave

S Broadway St

E Arlington Ave

Lauren Ln

W Arlington Ave

E Cleveland Ave

S 8th St

S Ross St

Co Rd E1820

Co Rd N2630

Dave Boyer Lake

32,210.9

11,502.5

42,846.7

20,671.9

98°19'30"W 98°18'45"W 98°18'0"W 98°17'15"W 98°16'30"W 98°15'45"W

34°22'30"N

34°23'0"N

34°23'30"N

34°24'0"N

98°20'15"W

34°23'0"N 34°22'30"N

0 0.2 0.4 0.6 0.8 1.0 MILE

0 0.2 0.4 0.6 0.8 1.0 KILOMETER

¢

Oklahoma State Plane South Projection, North American Datum, 1983

Incorporated areas from U.S. Census Bureau

Lakes from Oklahoma Water Resources Board

Aerial photography from National Agriculture Imagery Program (NAIP), 2010

Highways from University of Oklahoma Center for Spatial Analysis

Railroads from National Transportation Atlas Database, 2003

Topographic contours are shown at 10-foot intervals

Lawtonka model study area

Sunny-day inundation area

Maximum probable inundation area

Incorporated area

County boundary

Interstate highway

State highway

U.S. highway

Elevation contour (10-foot interval)

Primary

Secondary

Stream

Railroad

Bridge

Index cross section ! Point of interest

EXPLANATION

# U.S. Geological Survey

streamflow-gaging station

#0 U.S. Geological Survey 

lake-stage station

Time to maximum stage, 

in hours:minutes

3:54

Lawton

Walters

Lake Lawtonka

¢

Figure 5-11. Inundated areas for Lake Lawtonka dam-breach scenarios by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model (Hydrologic Engineering Center, 2010a).

Figure 5–11. Inundated areas for dam-breach scenarios for Lake Lawtonka, near Lawton, Oklahoma, modeled by using the Hydrologic Engineering Center’s River Analysis System (HEC-RAS) modeling software (Hydrologic Engineering Center, 2010a).
56 Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma

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ISBN 978-1-4113-3418-2

9 7 81411 334182

Rendon and others—Dam-Breach Analysis and Flood-Inundation Mapping for Lakes Ellsworth and Lawtonka near Lawton, Oklahoma—SIR 2012–5026

Printed on recycled paper