Hydrologic and Water-Quality Data for 

Surface Water, Ground Water, and 

Springs in North-Central Park County, 

Colorado, April 1997- November 1998

By Breton W. Bruce and Robert A. Kimbrough

U.S. GEOLOGICAL SURVEY 

Open-File Report 99-183

Prepared in cooperation with the

CITY OF AURORA, COLORADO, the

UPPER SOUTH PLATTE WATER CONSERVANCY DISTRICT, and the

PARK COUNTY GOVERNMENT

Denver, Colorado 

1999
U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Charles G. Groat, Director

The use of firm, trade, and brand names in this report is for identification purposes only and does 

not constitute endorsement by the U.S. Geological Survey.

For additional information write to:

District Chief 

U.S. Geological Survey 

Box 25046, Mail Stop 415 

Denver Federal Center 

Denver, CO 80225-0046

Copies of this report can be purchased 

from:

U.S. Geological Survey 

Information Services 

Box 25286 

Federal Center 

Denver, CO 80225
CONTENTS

Abstract..............................................................................................................^ 1

Introduction..................................................................................................................................................^ 1

Purpose and Scope....................................................................................................................................................... 2

Sampling Locations..................................................................................................................................................... 5

Methods of Data Collection................................................................................................................................................... 5

Surface-Water Discharge............................................................................................................................................. 5

Ground-Water Levels................................................................................................................................................... 8

Water-Quality-Sample Collection................................................................................................................................ 8

Quatity Ctontrol................................_^ 9

References................................................................^ 9

Hydrologic and Water-Quality Data...................................................................................................................................... 11

FIGURES

1-3. Maps showing:

1. Location of the study area in Park County, Colorado ............................................................................................. 2

2. Location of streamflow-gaging station and collection sites of surface-water-quality samples............................... 6

3. Location of wells in ground-water-level monitoring network and wells and springs sampled for 

ground-water quality................................................................................................................................................ 7

TABLES

1. Description of surface-water-quality sampling sites in north-central Park County, April 1997-September 1998 ........... 3

2. Description of wells and springs in north-central Park County, Colorado, with monthly water-level measurements

or water-quality samples, or both, 1997-98...................................................................................................................... 3

3. Daily mean discharge, site SW1, Tarry all Creek below Park Gulch near Como, Colorado, May 1997-

Septemberl998..............................................................................................._ 13

4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 1998................. 14

5. Water-quality data for site SW1, Tarryall Creek below Park Gulch near Como, Colorado, April 1997-

Septemberl998.......................................................» 19

6. Water-quality data for sites on Park Gulch (SW2-SW5), north-central Park County, Colorado, September 1997.......... 22

7. Water-quality data for sites on selected tributaries (SW6-SW8) in north-central Park County, Colorado, May 1998..... 24

8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998.............. 26

9. Water-quality-control data for sites in north-central Park County, Colorado, July 1997-June 1998................................ 34

CONTENTS III
CONVERSION FACTORS, VERTICAL DATUM, AND ABBREVIATIONS

Multiply

foot (ft)

inch (in)

acre-foot (acre-ft)

acre-foot (acre-ft)

cubic foot per second (ft3/s)

By

Length

0.3048

2.54

Volume

1,233

0.001233

Flow

0.02832

To obtain

meter (m)

centimeter (cm)

cubic meter (m3)

cubic hectometer (hm3)

cubic meter per second (m3/s)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F=1.8°C + 32

Sea level: In this report "sea level" refers to the National Geodetic Vertical Datum of 1929 a geodetic datum 

derived from a general adjustment of the first-order level nets of the United States and Canada, formerly called 

Sea Level Datum of 1929.

Elevation, as used in this report, refers to distance, in feet, above sea level.

Water levels, as used in this report, refers to distance, in feet, below or above (negative value) land surface.

Isotopic Ratios reported as "per mil" are calculated using the formula:

per mil (%c) = (Rsampie - Rreference/Rreference) X 1,000

where: R's are the ratios of 18O/16O or 2H/1H; sample, environmental water sample; reference, reference water 

sample is the Vienna Standard Mean Ocean Water (VSMOW).

ADDITIONAL ABBREVIATIONS

ft.bls feet below land surface 

|im micrometer

IV CONTENTS
Hydrologic and Water-Quality Data for Surface 

Water, Ground Water, and Springs in North-Central 

Park County, Colorado, April 1997-November 1998

By Breton W. Bruce and Robert A. Kimbrough

Abstract

This report summarizes baseline hydrologic 

data collected by the U.S. Geological Survey in 

north-central Park County, Colorado, during 

1997-98. Specifically, daily mean discharge for a 

location on Tarryall Creek is presented for May 

1997 to September 1998. Monthly ground-waterlevel measurements, from July 1997 to November 

1998, are given for a network of wells. The report 

also provides results of water-quality analyses 

for several surface- and ground-water sites and a 

few springs in north-central Park County. The 

methods used to obtain the hydrologic and waterquality data are presented.

INTRODUCTION

The City of Aurora, Colorado, has proposed a 

water-development project in north-central Park 

County, Colorado, called the South Park Conjunctive 

Use Project (SPCUP). The South Park Basin is an area 

in north-central Park County consisting of a highelevation (more than 9,200 ft above sea level) sedimentary basin (fig. 1). South Park Basin is surrounded 

by granitic and metamorphic terrain that reaches 

elevations higher than 13,000 ft along the Continental 

Divide. The phrase "conjunctive use," as used in the 

title of the SPCUP, has been defined as the combined 

development of surface- and ground-water resources 

to provide a sustainable water supply.

The proposed SPCUP would make use of available surface water during wet periods of the year by 

diverting water from local streams (the headwater

tributaries of Tarryall Creek) and using it to artificially 

recharge the sedimentary aquifers of the South Park 

Basin. The recharged water would be stored in these 

bedrock aquifers and used during future dry periods 

when it would be recovered through a network of 

pumping wells. Ground water would be pumped into 

Park Gulch where it would flow into Tarryall Creek 

and ultimately be delivered to Colorado's Front Range 

as streamflow in the South Platte River.

In 1997, the U.S. Geological Survey (USGS), in 

cooperation with the City of Aurora, Colorado, and the 

Upper South Platte Water Conservancy District, 

implemented an ongoing project to monitor surfaceand ground-water resources in north-central Park 

County. Park County government joined this group of 

cooperators in 1998. As part of this project, the USGS 

is monitoring surface-water discharge at a location on 

Tarryall Creek, which is the major surface-water 

drainage in north-central Park County. The USGS also 

is monitoring water quality at the Tarryall Creek site 

with monthly collection of surface-water samples. 

Additional surface-water-quality samples were 

collected from several locations on Park Gulch and 

from the headwater tributaries of Tarryall Creek that 

are proposed to supply recharge water to the SPCUP. 

Ground-water investigations begun in 1997 in northcentral Park County include monthly water-level 

measurements in a widely distributed network of 

wells. This network is composed of wells constructed 

in aquifers that could have hydrologic connection with 

the area of the proposed SPCUP ground-water development. In 1998, ground-water reconnaissance 

sampling was done to assess the ground-water-quality 

conditions in these aquifers.

Abstract
108'

South Park Basin 

study area (shown 

in figures 2 and 3)

10 20 MILES

10 20 KILOMETERS

Figure 1 . Location of the study area in Park County, Colorado.

Purpose and Scope

This report presents hydrologic data collected 

by the USGS during 1997-98 in north-central Park 

County. Surface-water data include daily mean 

discharge for Tarryall Creek below Park Gulch (May 

1997-September 1998) and results of water-quality 

analyses for Tarryall Creek below Park Gulch 

(monthly, April 1997-September 1998), four sites on 

Park Gulch (September 1997), and three headwater 

tributaries proposed to supply recharge water for the 

SPCUP (May 1998). Surface-water sites are listed in 

table 1. Ground-water data include water levels for 

35 wells at 29 locations completed in some of the 

primary aquifers in north-central Park County 

(monthly, July 1997-November 1998), results of 

water-quality analyses for ground-water samples 

collected from these same aquifers (17 wells sampled

once between May and August 1998), and waterquality data from 4 springs (sampled once in May 

1998). Wells and springs are listed in table 2.

Temperature, pH, specific conductance, and 

dissolved oxygen were measured onsite at each location where water samples were collected. Water 

samples were analyzed for alkalinity, major dissolved 

ions, trace elements, and nutrients (compounds of 

nitrogen and phosphorus). Additionally, selected 

samples were analyzed for suspended sediment, 

organic carbon, radon, and isotopes of oxygen and 

hydrogen. Isotopic data are reported as the ratio of the 

concentration of one isotope to the other, compared to 

a standard (see conversion table at the front of this 

report). The reporting units for isotopic ratios are in 

per mil (per thousand). Isotopic ratios can be used to 

distinguish one water from another or to help to determine the source of a water sample. Selected wells also

Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 1. Description of surface-water-quality sampling sites in north-central Park County, 

April 1997-September 1998

Site 

number 

(fig- 2)

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

U.S. Geological 

Survey site 

identification 

number

06697100

391922105535400

391847105530400

391755105515600

391628105502100

391958105520200 

06697450

392453105501100

Site name

Tarry all Creek below Park Gulch near Como1

Park Gulch above Como

Park Gulch below Como

Park Gulch above King Mine near Como

Park Gulch above Slater Ditch near Como

Tarryall Creek at U.S. Highway 285 near Como2 

Michigan Creek above Jefferson2

Jefferson Creek below Jefferson Lake near Jefferson

iThis site also is a continuous-recording streamflow-gaging station operated by the U.S. Geological 

Survey.

2This site also is a continuousWater Resources.

s-recording streamflow-gaging station operated by the Colorado Division of

Table 2. Description of wells and springs in north-central Park County, Colorado, with monthly water-level measurements 

or water-quality samples, or both, 1997-98

[n/a, not applicable; SPF, sedimentary South Park aquifer of Tertiary age; GRNT, granite aquifer of Precambrian age; e, estimated from U.S. Geological Survey 

geophysical logs; , no data; X, data were collected]

Site 

identifier 

(fig. 3)

GW1

GW2

GW3

GW4

GW5

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13

GW14a

Station number

392313105471901

392238105480301

392239105480501

391337105484301

392037105505101

392232105515001

392414105512601

392235105504301

392202105493501

392308105492001

392148105490801

391645105472301

391511105500301

391631105480404

Well depth 

(feet)

57

100

9

75

35

50

55

120

150

57

200

98

90

2,000

Well casing (C) 

or open hole (O)

C

C

O

C

C

C

O

C

C (0-124 feet)

O (124-150 feet)

C

C

C

C

C

Perforated 

interval 

(feet below land 

surface)

25-57

60-80

n/a

35-75

unknown

30-50

n/a

80-120

80-124

unknown

120-140

160-200

38^8

68-98

35-79

920-960

1,000-1,080

1,160-1,180

1,280-1,300

1,390-1,430

1,450-1,500

1,570-1,590

1,650-1,690

1,770-1,790

1,810-1,850

1,950-1,970

Apparent 

aquifer near 

well screen

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

Monthly 

water 

levels 

(1997-98)

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Waterquality 

samples 

(1998)

-

-

-

X

-

-

-

-

X

-

X

X

INTRODUCTION
Table 2. Description of wells and springs in north-central Park County, Colorado, with monthly water-level measurements 

or water-quality samples, or both, 1997-98 Continued

[n/a, not applicable; SPF, sedimentary South Park aquifer of Tertiary age; GRNT, granite aquifer of Precambrian age; e, estimated from U.S. Geological Survey 

geophysical logs; , no data; X, data were collected]

Site 

identifier 

(fig. 3)

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GW17a

GW17b

GW17c

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

GW30

GW31

GW32a

GW32b

GW32c

GW32d

SPG1

SPG2

SPG3

SPG4

Station number

391631105480401

391631105480402

391631105480403

391605105484508

391605105484507

391625105501001

391629105501017

391629105501018

391629105501001

391432105485501

392058105481101

392241105495601

391 158105490601

391259105494901

391956105475101

391150105473701

391314105465501

391845105452301

391830105500801

391631105461301

391441105474501

391716105494401

391602105473801

391452105483501

391452105483502

391452105483503

391452105483504

391449105482801

391216105484801

391320105464000

391438105483600

Well depth 

(feet)

300

500

100

98

28

98

43.5

15

400

100

50

477

88

82

90

350

425

302

500

140

620

300

280

166.5

77

68

450

Spring

Spring

Spring

Spring

Well casing (C) 

or open hole (O)

C

C

C

C

C

C

C

C

C

C

C

C

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

n/a

n/a

n/a

n/a

Perforated 

interval 

(feet below land 

surface)

e!97-202

207-222

232-242

252-262

272-282

385-395

405^15

425^35

445^55

465^75

unknown

20-98

23-28

20-98

33.5^3.5

5-15

60-100

160-180

200-240

280-340

380-390

50-95

17-39

197-217

237-357

437^57

n/a

34-69

50-72

290-350

320-425

240-302

40-500

100-140

484-604

140-160

260-280

250-280

126.5-166.5

57-77

38-68

380-450

n/a

n/a

n/a

n/a

Apparent 

aquifer near 

well screen

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

SPF

GRNT

GRNT

GRNT

SPF

GRNT

GRNT

SPF

GRNT

GRNT

SPF

GRNT

SPF

GRNT

SPF

GRNT

SPF

Monthly 

water 

levels 

(1997-98)

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

-

-

-

-

-

--

--

-

-

Waterquality 

samples 

(1998)

X

X

--

-

-

X

-

-

-

-

--

-

--

-

X

-

X

X

X

X

X

X

X

X

X

X

X

X

X

Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
were sampled for tritium, which can indicate the 

approximate age of the water by indicating when the 

water entered the saturated part of the aquifer and 

became isolated from the atmospheric source of 

tritium. For a detailed description of the primary 

analytical procedures used in these water analyses, the 

reader is referred to Faires (1993) and Fishman (1993).

Sampling Locations

As part of this study, a streamflow-gaging 

station was installed on Tarryall Creek just downstream from the confluence with Park Gulch (SW1) 

(fig. 2). Under the proposed SPCUP, discharge in Park 

Gulch and Tarryall Creek would be augmented with 

ground water pumped into Park Gulch. The gage 

provides a record of baseline surface-water discharge 

in Tarryall Creek prior to the possible implementation 

of any future water-development projects.

Ground-water levels were monitored monthly in 

a network of wells distributed over north-central Park 

County (fig. 3). This water-level network was not 

designed to generate a potentiometric map, and the 

measured wells some with multiple perforated 

casing intervals are completed in several different 

aquifers. Consequently, the elevation of the measuring 

point for the reported water levels was never determined. Generally, wells were chosen for this network 

only if a record of well construction was available and 

the wells had minimal or no regular use. Wells of this 

type provide a more accurate static water level. Certain 

domestic wells in the granitic aquifer on the east side 

of the study area had sporadic use during the measurement period; however, this use could not be documented. Substantial differences in water levels in these 

wells, from one month to the next, might be related to 

recent pumping. Additionally, some wells had such 

shallow water levels that ice developed near the land 

surface, and water levels could not be measured at 

those times. A few wells eventually had to be dropped 

from the network due to plumbing modifications at the 

surface or a change in frequency of use.

Water samples collected during this study were 

from locations chosen to provide an areally distributed 

assessment of water-quality conditions for resources in 

north-central Park County. Surface-water samples 

were collected from locations on the headwater tributaries of Tarryall Creek (fig. 2) near the proposed 

diversion points of artificial-recharge water (SW6,

SW7, SW8) and from the streams that would be 

receiving ground water pumped from the production 

wells under the proposed SPCUP (SW1 through 

SW5). Well and spring samples were collected from 

sedimentary aquifers in the South Park Basin and from 

the nearby granitic aquifer east of the basin (table 2, 

fig. 3). With the exception of SPG2, springs indicated 

as discharging from the sedimentary aquifers of the 

South Park Basin (SPG1, SPG4) were immediately 

adjacent to the outcrop of the granitic aquifer to the 

east, and the subsurface source of the water from these 

springs has not been determined. Table 2 lists the 

apparent aquifers sampled by each well and spring 

and, in the case of sampled wells, the completion 

depth and perforated intervals of the well below land 

surface.

METHODS OF DATA COLLECTION

Several collection techniques were used to 

acquire hydrologic and water-quality data in northcentral Park County. Methods used to obtain a continuous record of surface-water discharge and samples of 

surface water and ground water for chemical analysis 

are described in this section.

Surface-Water Discharge

The data obtained at the Tarryall Creek 

streamflow-gaging station (SW1) consist of a continuous record of stream stage, individual measurements 

of stream discharge throughout a range of stages, and 

notations regarding factors that may affect the relation 

of stage to discharge. Using standard USGS methods 

(Rantz and others, 1982), these data, together with 

supplemental information such as weather records, are 

used to compute records of daily mean discharge.

Stream stage at the gaging station is recorded by 

an electronic data logger every 15 minutes. Additionally, the record of stream stage is transmitted every 

4 hours by satellite to the USGS office in Denver, 

Colorado. The satellite transmissions enable a preliminary record of real-time streamflow to be computed. 

Stream stage is correlated with monthly measurements 

of stream discharge to provide a continuous record of 

the amount of water passing the gage.

The formation of ice in the stream channel 

prohibits the collection of accurate stage data during

METHODS OF DATA COLLECTION
39°15'

105°45'

I

0 1 2 MILES

0 1 2 KILOMETERS 

EXPLANATION

SWl Surface-water-quality sampling site at a continuous-recording 

^^ streamflow-gaging station and site number (table 1)

,SW2 

/\ Surface-water-quality sampling site and site number (table 1)

Figure 2. Location of streamflow-gaging station and collection sites of surfacewater-quality samples.

6 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
39°15'

105-45'

T

2 MILES

1 2 KILOMETERS

EXPLANATION

GW20

I Well with only water-level data 

' (number refers to table 2)

GW30

O Well with only water-quality data

(number refers to table 2) 

GW17

-<j)- Well with both water-level and

water-quality data (number refers 

to table 2)

SPG2

 Spring with water-quality data

(number refers to table 2)

Figure 3. Location of wells in ground-water-level monitoring network and wells and springs sampled for groundwater quality.

METHODS OF DATA COLLECTION
winter months at the Tarry all Creek gage (SW1). 

During periods of ice cover, daily mean discharge was 

estimated using monthly manual discharge measurements and weather records for sites in Park County. 

Estimated daily discharges for periods of ice effect or 

instrument malfunctions are indicated with an "e" in 

table 3 in the "Hydrologic and Water-Quality Data" 

section at the back of this report

Ground-Water Levels

Ground-water levels were measured on a 

monthly basis in 35 wells at 29 different locations in 

the study area. The locations where water levels were 

measured monthly are indicated by a plus-sign or a 

plus-sign/circle in figure 3. Multiple wells measured at 

a given location each have perforated casing at 

different depths providing information about vertical 

hydraulic gradients. Some wells (for example, 

GW14a) have multiple perforated intervals in the same 

casing string, and water levels should be interpreted 

with this consideration. Water levels were measured 

with either a steel tape or vinyl-coated electric tape. 

Depth to water at each well was measured from the 

same point on the well casing every month, and the 

difference in elevation between the measuring point 

and the land surface was subtracted, to obtain depth in 

feet below land surface (ft.bls). Water levels are 

reported to the nearest 0.01 ft. Monthly depth-to-water 

values for each measured well are listed in table 4 in 

the the "Hydrologic and Water-Quality Data" section 

at the back of this report.

Water-Quality-Sample Collection

Water-quality samples were collected in a 

manner to minimize the potential for sample contamination. Most surface-water samples were collected and 

processed using equipment made from Teflon or highdensity polyethylene. Prior to use, all sampling equipment was cleaned with a nonphosphate laboratory 

detergent and rinsed first with tap water followed by a 

5-percent solution of hydrochloric acid and then by 

deionized water. The equipment was rinsed with 

copious amounts of native water at the sampling sites 

before sample collection.

Under ice-free conditions, depth- and widthintegrated surface-water samples were collected from 

streams in the study area using the equal-width-increment method (Edwards and Glysson, 1988). During 

periods of ice cover, stream water was accessed by 

chopping a hole in the ice, and samples were collected 

by either dipping a bottle into the flow or pumping 

water directly into a compositing container. Concurrent with sample collection, onsite measurements were 

obtained for water temperature, pH, specific conductance, dissolved oxygen, alkalinity, and discharge.

Ground-water samples collected from existing 

wells were acquired using either a portable submersible pump or an existing permanent pump according 

to methods described by Koterba and others (1995). 

The portable pump was cleaned before each use by 

circulating a nonphosphate detergent/water solution 

through the pump and discharge lines for at least 

5 minutes followed by a tap-water rinse and deionizedwater rinse. Wells were initially purged at the highest 

flow rate possible until a minimum of three casing 

volumes was removed. The exceptions were domestic 

wells that had existing permanent pumps and that were 

completed in the granitic aquifer. These domestic 

wells were in daily use by homeowners at the site and 

had already been pumped on the day of sampling. 

However, a substantial amount of water was pumped 

for purging purposes from these domestic wells before 

sampling commenced. After this initial purging of the 

wells, flow rates were reduced, and dissolved oxygen, 

pH, specific conductance, and temperature were monitored inside a sealed flowthrough chamber (Koterba 

and others, 1995). These field parameters were 

recorded every 5 minutes until stable readings were 

achieved. Water then was diverted to a sampling 

chamber where filtered and unfiltered samples were 

collected in precleaned bottles.

Samples collected from springs during this 

study were acquired by installing a temporary well 

point into the source of the spring water. The well 

point was manufactured from either a 0.5-in. 

aluminum electrical conduit with a crimped tip and 

drilled perforations or a 1.5-in. steel pipe with a 

stainless-steel wire-wrapped screen attached to the 

end. The perforated end of each of these well points 

was about 4 in. in length. The well point was installed 

either directly into the area where spring water 

discharged to the land surface or into the ground just 

above the point of discharge. At two springs, a handheld posthole auger was used to bore through unsaturated soil layers. Water was pumped from these 

temporary well points by using clean polyethylene 

tubing and a peristaltic pump.

Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Water-quality samples were prepared for analysis onsite using methods described by Horowitz and 

others (1994), Shelton (1994), and Koterba and others 

(1995). Aliquots of unfiltered water were collected for 

analysis of the total recoverable concentrations of the 

constituents listed in tables 5-9 in the "Hydrologic and 

Water-Quality Data" section at the back of the report. 

With the exception of dissolved organic carbon, 

sample water used to determine the dissolved fraction 

of constituents was filtered through a 0.45-jLim cellulose nitrate filter. Water used for dissolved organic 

carbon analyses was filtered through a 0.45-jum silver 

filter. Samples for nutrient and organic carbon analyses were immediately chilled to 4°C, and samples 

for major-cation and trace-element analyses were 

acidified to a pH of less than 2.0 by use of ultrapure 

nitric acid. Samples susceptible to degassing or 

contamination with atmospheric gases (radon, isotopes 

of oxygen and hydrogen) were sampled in a closed 

system to avoid contact with ambient air (Koterba and 

others, 1995). Samples were submitted for analysis to 

USGS laboratories in Denver, Colorado; Reston, 

Virginia; Menlo Park, California; and Iowa City, Iowa. 

The results of the water-quality analyses for all environmental samples are listed in tables 5-8 at the back 

of this report.

Quality Control

About 20 percent of the total number of samples 

analyzed was for quality control. These samples 

included field equipment blanks and replicate environmental samples. Blank samples are designed to 

evaluate contamination potential from sampling equipment and sample processing; sequential replicate 

samples evaluate potential data variability relating to 

sampling and analytical techniques. The qualitycontrol samples were analyzed for major ions, nutrients, trace elements, and dissolved organic carbon. 

The results of analyses for the equipment-blank 

samples are provided in table 9 at the back of this 

report. Small concentrations of major ions (calcium, 

magnesium, chloride, and carbonate alkalinity), nutrients (ammonia and orthophosphate), and trace 

elements (manganese, zinc, and aluminum) were 

detected in one or more blank samples. Major-ion 

concentrations detected in blank samples were very

small compared to concentrations measured in environmental samples. Concentrations of nutrents and 

trace elements in environmental samples need to be 

evaluated compared to constituents and concentrations 

detected in the blank samples. Replicate qualitycontrol samples and the analyses of the paired environmental samples also are listed in table 9. Good agreement between constituent concentrations in replicate 

pairs indicate that these data are of high quality.

REFERENCES

Edwards, T.K., and Glysson, G.D., 1988, Field methods for 

measurement of fluvial sediment: U.S. Geological 

Survey Open-File Report 86-531, 118 p.

Faires, L.M., 1993, Methods of analysis by the U.S. 

Geological Survey National Water Quality Laboratory Determination of metals in water by inductively 

coupled plasma-mass spectrometry: U.S. Geological 

Survey Open-File Report 92-634, 28 p.

Fishman, M.J., 1993, Methods of analysis by the U.S. 

Geological Survey National Water Quality Laboratory Determination of inorganic and organic constituents in water and fluvial sediments: U.S. Geological 

Survey Open-File Report 93-125, 217 p.

Horowitz, A.J., Demas, C.R., Fitzgerald, K.K., Miller, T.L., 

and Rickert, D.A., 1994, U.S. Geological Survey 

protocol for the collection and processing of surfacewater samples for the subsequent determination of 

inorganic constituents in filtered water: U.S. Geological Survey Open-File Report 94-539, 57 p.

Koterba, M.T., Wilde, F.D., and Lapham, W.W., 1995,

Ground-water data-collection protocols and procedures 

for the National Water-Quality Assessment 

Program Collection and documentation of waterquality samples and related data: U.S. Gec^ogical 

Survey Open-File Report 95-399, 113 p.

Rantz, S.E., and others, 1982, Measurement and computation of streamflow v. 1, Measurement of stage and 

discharge; v. 2, Computation of discharge: U.S. 

Geological Survey Water-Supply Paper 2175, v. 1, 

p. 1-284; v. 2, p. 285-631.

Shelton, L.R., 1994, Field guide for collecting and 

processing stream-water samples for the National 

Water-Quality Assessment Program: U.S. Geological 

Survey Open-File Report 94-455, 42 p.

REFERENCES
HYDROLOGIC AND WATER-QUALITY DATA
Table 3. Daily mean discharge, site SW1, Tarryall Creek below Park Gulch near Como, Colorado, May 1997-September 1998

[Discharge, in cubic feet per second; e, estimated; --, no data; Max, maximum; Min, minimum; Acre-ft, acre-feet]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Total

Mean

Max

Min

Acre-ft

Water year 1997

May

-

-

-

-

-

-

-

-

23

24

26

30

30

34

37

42

44

46

51

51

52

62

55

45

42

40

35

33

33

40

43

-

-

-

~

-

June

50

70

83

90

104

122

147

138

163

143

125

109

115

118

103

99

99

97

98

102

102

130

108

100

92

86

81

67

65

61

-

3,067

102

163

50

6,080

July

56

50

46

40

36

33

32

32

32

31

29

30

27

25

23

e23

e22

e23

e25

e31

e27

e26

e26

e26

e26

26

29

40

41

47

41

1,001

32

56

22

1,990

Aug

47

50

37

39

38

43

51

40

33

35

33

30

e29

e28

e26

e25

e24

e30

e28

e25

e23

e21

e!9

e!8

e!7

e24

e35

e34

e26

e24

e25

957

31

51

17

1,900

Sept

e25

e30

e50

e33

e27

e25

e23

e22

e21

e20

e24

e21

e!9

e!9

e!7

e!6

e!5

e!6

e!5

e!7

e23

e21

e!9

e!6

13

13

12

11

11

11

-

605

20

50

11

1,200

Oct

11

11

11

10

9.9

9.8

9.6

10

9.6

9.4

9.9

10

9.7

11

11

9.8

9.4

8.8

8.4

8.9

11

10

9.5

e9.5

e9.5

e9.5

e9.5

e9.5

e9.5

e9.5

e9.5

305

9.8

11

8.4

604

Nov

e9.2

e9.2

e9.2

e9.0

e8.8

e8.8

e8.6

e8.6

e8.6

e8.6

e8.4

e8.3

e8.2

e8.2

e8.2

e8.0

e8.0

e8.0

e8.0

e7.7

e7.5

e7.3

e7.3

e7.3

e7.3

e7.2

e7.0

e7.0

e7.0

e6.8

-

241

8.0

9.2

6.8

479

Dec

e6.6

e6.4

e6.2

e6.2

e6.0

e5.8

e5.8

e5.8

e5.6

e5.6

e5.4

e5.4

e5.2

e5.2

e5.0

e5.0

e5.0

e5.0

e4.8

e4.6

e4.5

e4.3

e4.2

e4.2

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

156

5.0

6.6

4.0

309

Jan

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e4.0

e3.9

e3.8

e3.7

e3.6

e3.5

e3.4

e3.3

e3.3

e3.3

e3.3

e3.3

e3.1

e3.1

e3.1

e3.1

e3.0

e3.0

e3.1

e3.3

e3.3

e3.4

110

3.6

4.0

3.0

218

Feb

e3.5

e3.5

e3.5

e3.5

e3.5

e3.5

e3.5

e3.5

e3.5

e3.5

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.3

e3.5

e3.7

e3.7

e3.5

e3.1

e3.3

-

-

-

95.4

3.4

3.7

3.1

189

Water year 1998

Mar

e3.2

e3.0

e3.2

e3.0

e2.9

e2.8

e2.8

e2.7

e2.5

e2.7

e2.7

e2.7

e2.7

e2.7

e2.8

e3.0

e3.2

e3.5

e3.9

e4.5

e6.2

e8.0

elO

e!3

e!6

e!8

16

14

11

10

12

195

6.3

18

2.5

386

Apr

13

8.9

14

9.7

9.3

7.7

9.5

7.6

6.7

7.3

8.8

10

8.7

8.7

6.5

7.3

8.0

7.6

6.6

6.8

6.7

7.4

10

13

14

14

12

12

11

12

-

285

9.5

14

6.5

565

May

13

14

15

17

19

19

19

19

22

23

23

23

22

24

23

22

19

19

21

24

29

27

24

22

23

21

14

11

20

23

23

637

20

29

11

1,260

June

24

26

27

29

26

20

18

18

18

18

20

19

16

15

19

26

24

22

22

22

23

27

24

19

21

21

20

20

20

20

-

644

22

29

15

1,280

July

24

24

24

27

26

24

27

28

29

58

46

23

17

13

9.1

6.9

6.1

8.8

10

11

12

28

43

45

41

42

34

34

47

34

35

837

27

58

6.1

1,660

Aug

40

40

32

31

33

28

22

20

21

29

26

23

23

28

25

23

26

21

20

23

21

18

16

15

19

19

16

15

14

13

13

713

23

40

13

1,410

Sept

30

23

18

16

15

14

13

13

12

12

12

12

14

13

12

22

17

13

12

11

11

10

10

10

9.0

8.7

8.9

9.0

9.3

11

-

401

13

30

8.7

795

HYDROLOGIC AND WATER-QUALITV DATA 13
Table 4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 1998

[WL, water level in feet below or above (-) land surface; T., township; R., range; MP stickup, height of measuring point above (-) or below land surface; 

 , no data]

Site 

identifier

GW1

GW2

GW3

GW4

GW5 

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13

GW14a

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GW17a

GW17b

GW17c 

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

Township/range

T. 8 S., R. 75 W., sec. 4, southwest quarter of the northwest quarter

T. 8 S., R. 75 W., sec. 5, southeast quarter of the southwest quarter

T. 8 S., R. 75 W., sec. 5, southeast quarter of the southwest quarter

T. 9 S., R. 75 W., sec. 31, southeast quarter of the northeast quarter

T. 8 S., R. 76 W., sec. 23, southeast quarter of the northeast quarter 

T. 8 S., R. 76 W., sec. 1 1, northwest quarter of the northwest quarter

T. 7 S., R 76 W., sec. 35, northeast quarter of the northwest quarter

T. 8 S., R 76 W., sec. 11, northeast quarter of the northeast quarter

T. 8 S., R 75 W., sec. 7, northwest quarter of the southwest quarter

T. 8 S., R.75 W., sec. 6, southeast quarter of the northwest quarter

T. 8 S., R. 75 W., sec. 7, southeast quarter of the southwest quarter

T. 8 S., R. 75 W., sec. 33, southwest quarter of the northwest quarter

T. 9 S., R. 76 W., sec. 24, northwest quarter of the southeast quarter

T. 9 S., R. 75 W., sec. 8, southeast quarter of the southwest quarter

T. 9 S., R. 75 W., sec. 8, southeast quarter of the southwest quarter

T. 9 S., R. 75 W., sec. 8, southeast quarter of the southwest quarter

T. 9 S., R. 75 W., sec. 8, southeast quarter of the southwest quarter

T. 9 S., R. 75 W., sec. 18, southwest quarter of the northeast quarter

T. 9 S., R. 75 W., sec. 18, southwest quarter of the northeast quarter

T. 9 S., R. 76 W., sec. 13, northeast quarter of the northwest quarter

T. 9 S., R. 75 W., sec. 18, northeast quarter of the northeast quarter

T. 9 S., R. 75 W., sec. 18, northeast quarter of the northeast quarter

T. 9 S., R. 75 W., sec. 18, northeast quarter of the northeast quarter 

T. 9 S., R. 75 W., sec. 30, northwest quarter of the northeast quarter

T. 8 S., R. 75 W., sec. 17, southeast quarter of the southwest quarter

T. 8 S., R. 76 W., sec. 1, southeast quarter of the southeast quarter

T. 10 S., R. 75 W., sec. 7, northeast quarter of the northwest quarter

T. 10 S., R. 76 W., sec. 1 , northeast quarter of the northeast quarter

T. 8 S., R. 75 W., sec. 29, northwest quarter of the northeast quarter

T. 10 S., R. 75 W., sec. 8, northeast quarter of the northeast quarter

T. 9 S., R. 75 W., sec. 33, southwest quarter of the northeast quarter

T. 8 S., R. 75 W., sec. 34, northeast quarter of the southeast quarter

T. 8 S., R. 76 W., sec. 36, northwest quarter of the southeast quarter

T. 9 S., R. 75 W., sec. 15, southwest quarter of the northwest quarter

T. 9 S., R. 75 W., sec. 29, northeast quarter of the northwest quarter

Latitude

39°23'13"

39°22'38"

39°22'39"

39°13'37"

39°20'37"

39°22'32"

39°24'14"

39°22'35"

39°22'02"

39°23'08"

39°21'48"

39°16'45"

39°15'11"

39°16'31"

39°16'31"

39°16'31"

39°16'31"

39°16'05"

39°16'05"

39°16'25"

39°16'29"

39°16'29"

39°16'29" 

39°14'32"

39°20'58"

39°22'41"

39°11'58"

39°12'59"

39°19'56"

39°11'50"

39°13'14"

39°18'45"

39°18'30"

39°16'31"

39°14'41"

Longitude

105°47'19"

105°48'03"

105°48'05"

105°48'43"

105°50'51" 

105°51'50"

105°51'26"

105°50'43"

105°49'35"

105°49'20"

105°49'08"

105°47'23"

105°50'03"

105°48'04"

105°48'04"

105°48'04"

105°48'04"

105°48'45"

105°48'45"

105°50'10"

105°50'10"

105°50'10"

105°50'10" 

105°48'55"

105°48'11"

105°49'56"

105°49'06"

105°49'49"

105°47'51"

105°47'37"

105°46'55"

105°45'23"

105°50'08"

105°46'13"

105°47'45"

Depth 

(feet)

57

100

9

75

35 

50

55

120

150

57

200

98

90

1,950

300

500

100

98

28

98

43.5

15

400 

100

50

477

88

82

90

350

425

302

500

140

620

MP 

Stictrjp

(fee*)

-1.4

-0.4

0

-0.85

1

-1.65

0

-06

-07

-0.9

-08

-03

-1.1

-1.0

-09

-1.5

-2.3

-1.5

-1.5

-1.8

-1.4

-1.5

-1.2 

-1.8

-1.2

-0.9

-1.3

-C.7

-C.7

-C.4

-C.6

-C.9

-C.7

-C.3

-1.7

14 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 

1998 Continued

[WL, water level in feet below or above (-) land surface; MP stickup, height of measuring point above (-) or below land surface; , no data]

Site 

identifier

GW1

GW2

GW3

GW4

GW5

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13

GW14a

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GW17a

GW17b

GW17c

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

Measurement 1

Date

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

07/31/97

08/01/97

07/31/97

07/31/97

07/31/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

08/01/97

--

--

--

--

--

_.

WL 

(feet)

8.49

4.38

3.55

15.74

6.55

6.35

32.69

10.83

40.56

10.13

41.72

3.03

35.17

!-14.87

14.16

8.01

8

22.71

22.96

7.95

1.05

2.18

2.58

13.06

3.31

102.44

35.7

30.69

--

--

--

..

--

--

__

Measurement 2

Date

08/28/97

08/28/97

08/28/97

08/26/97

08/28/97

08/28/97

08/28/97

08/28/97

08/28/97

08/28/97

08/28/97

08/26/97

08/26/97

08/26/97

08/26/97

08/26/97

08/26/97

08/26/97

08/26/97

08/28/97

08/28/97

08/28/97

08/28/97

08/26/97

08/26/97

08/28/97

08/26/97

08/26/97

08/26/97

08/25/97

08/25/97

08/26/97

--

--

__

WL 

(feet)

8.54

4.42

3.66

15.82

8.83

10.19

33.03

11.01

40.07

11.73

41.68

3.29

34.83

'-14.87

14.45

7.79

9.78

22.58

22.87

7.29

0.49

1.77

1.78

13.11

4.53

102.85

35.68

30.69

16.9

272.65

148.09

100.65

--

--

__

Measurement 3

Date

10/08/97

10/08/97

10/08/97

10/07/97

10/09/97

10/08/97

10/08/97

10/08/97

10/08/97

10/08/97

10/08/97

10/08/97

10/07/97

10/07/97

10/07/97

10/07/97

10/07/97

10/07/97

10/07/97

10/06/97

10/06/97

10/06/97

10/06/97

10/07/97

10/08/97

10/08/97

10/07/97

10/07/97

10/09/97

10/10/97

10/10/97

10/09/97

10/08/97

10/10/97

__

WL 

(feet)

8.68

5.13

4.03

15.76

10.78

14.06

32.28

11.29

40.89

12.77

41.34

3.63

34.18

2-10.94

14.08

7.02

9.64

22.08

22.51

7.4

1.53

2.47

2.51

13.1

4.98

101.84

35.69

30.61

17.38

277.92

139.44

100.22

71.95

28.58

..

Measurement 4

Date

11/07/97

11/07/97

11/07/97

1 1/06/97

11/07/97

11/07/97

11/07/97

11/07/97

11/07/97

11/07/97

11/07/97

11/06/97

11/06/97

11/07/97

11/06/97

1 1/06/97

11/06/97

11/06/97

1 1/06/97

11/06/97

11/06/97

11/06/97

11/06/97

11/06/97

11/07/97

11/07/97

11/06/97

11/06/97

11/06/97

1 1/6/97

11/06/97

1 1/06/97

11/06/97

11/06/97

__

WL 

(feet)

8.35

4.74

3.8

15.95

11.62

16.01

33.33

11.03

40.77

13.07

41.2

3.21

33.7

2-11.46

14.16

6.85

9.79

21.81

22.55

4.28

1.17

2.22

2.14

13.29

5.27

101.29

35.73

30.7

18.57

276.78

137.11

100.26

71.96

29.27

..

HYDROLOGiC AND WATER-QUALIT' DATA 15
Table 4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 

1998 Continued

[WL, water level in feet below or above (-) land surface; MP stickup, height of measuring point above (-) or below land surface; , no data]

Site 

identifier

GW1

GW2

GW3

GW4

GW5

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13

GW14a

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GW17a

GWlTb

GW17c

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

Measurement 5

Date

12/11/97

12/11/97

12/11/97

12/09/97

12/10/97

12/11/97

12/10/97

12/11/97

12/11/97

12/10/97

12/11/97

12/09/97

12/10/97

too cold to shut in

12/10/97

12/10/97

12/10/97

12/10/97

12/10/97

12/10/97

12/10/97

12/10/97

12/10/97

12/9/97

12/11/97

12/11/97

12/09/97

12/09/97

12/09/97

12/09/97

12/09/97

12/09/97

12/10/97

12/09/97

WL 

(feet)

8.26

5.27

4.53

15.89

12.07

17.64

33.59

11.39

40.62

13.17

41.22

3.78

33.53

14.29

7.04

9.78

21.92

22.68

7.33

1.59

2.73

2.5

13.21

5.53

101.39

35.7

30.73

20.49

278.34

137.06

100.37

71.99

29.24

Measurement 6

Date

01/08/98

01/08/98

01/08/98

01/07/98

01/07/98

01/08/98

01/08/98

01/08/98

01/08/98

010/8/98

01/07/98

frozen ice bridge

01/07/98

too cold to shut in

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/07/98

01/08/98

01/07/98

01/07/98

01/08/98

01/07/98

01/07/98

01/07/98

01/07/98

010/7/98

WL 

(feet)

8.52

6.08

5.21

16.06

13.14

18.6

34.09

11.55

40.48

13.17

40.9

33.34

14.63

7.65

10.04

22.51

23.23

7.84

2.09

3.15

3.05

13.4

6.12

102.14

35.77

30.88

22.28

279.36

138.24

100.47

72.02

30.09

Measurement 7

Date

02/12/98

02/12/98

02/12/98

02/11/98

02/12/98

02/12/98

02/12/98

02/12/98

02/12/98

02/12/98

02/12/98

frozen ice bridge

02/1 1/98

too cold to shut in

02/1 1/98

02/1 1/98

02/11/98

02/11/98

02/11/98

02/11/98

02/11/98

02/11/98

02/1 1/98

02/1 1/98

02/12/98

02/12/98

02/11/98

02/11/98

02/12/98

02/1 1/98

02/11/98

02/11/98

02/11/98

02/11/98

02/11/98

WL 

(feet)

9.13

6.58

6.03

16.18

14.94

19.79

34.85

11.96

40.4

13.23

40.91

32.96

15.22

8.24

10.75

23.11

23.75

8.1

2.33

3.28

3.32

13.68

6.68

102.39

35.81

30.96

23.37

266.29

136.19

100.69

72.07

30.85

310.5

Measurement 8

Date

03/12/98

03/12/98

03/12/98

03/1 1/98

03/12/98

03/12/98

03/12/98

03/12/98

03/12/98

03/12/98

03/12/98

frozen ice bridge

03/11/98

too cold to shut in

03/1 1/98

03/11/98

03/11/98

03/11/98

03/11/98

03/11/98

03/1 1/98

03/1 1/98

03/11/98

03/1 1/98

03/12/98

03/12/98

03/1 1/98

03/11/98

03/12/98

03/11/98

03/11/98

03/12/98

03/12/98

03/12/98

03/11/98

WL 

(feet)

9.3:

6.82

6.51

16.33

16.26

19.9*

35.4P

12.2^

40.32

13.2<*

40.92

33.4°

15.1

8.53

10.29

23.08

23.96

7.91

2.08

2.98

3.06

13.65

7.21

102.9

35.85

31. OP

33.48

265.48

160.18

100.9.M

72.12

32.01

310.74

16 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 

1998 Continued

[WL, water level in feet below or above (-) land surface; MP stickup, height of measuring point above (-) or below land surface; --, no data]

Site 

identifier

GW1

GW2

GW3

GW4

GW5

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13

GW14a

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GW17a

GW17b

GW17c

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

Measurement 9

Date

04/07/98

04/07/98

04/07/98

04/07/98

04/08/98

04/07/98

04/07/98

04/07/98

04/07/98

04/07/98

04/07/98

frozen ice bridge

04/07/98

04/08/98

04/07/98

04/07/98

04/07/98

04/08/98

04/08/98

04/08/98

040/8/98

04/08/98

04/08/98

04/07/98

04/08/98

04/07/98

04/08/98

040/8/98

04/07/98

040/8/98

04/08/98

04/07/98

04/08/98

04/08/98

04/08/98

WL 

(feet)

8.36

6.1

5.48

15.81

16.99

18.97

35.42

11.61

40.22

13.02

40.74

33.34

2-10.94

14.5

7.25

9.26

21.42

22.06

7.38

frozen

2.85

2.57

13.66

5.75

102.81

35.86

30.99

25.75

267.02

136.73

99.66

72.17

27.57

310.73

Measurement 10

Date

05/05/98

05/05/98

05/05/98

05/04/98

05/05/98

05/05/98

05/05/98

05/05/98

05/05/98

05/05/98

05/05/98

frozen ice bridge

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/04/98

05/05/98

050/5/98

050/4/98

05/04/98

05/05/98

05/04/98

05/04/98

05/05/98

05/04/98

05/04/98

05/04/98

WL 

(feet)

7.42

6.48

4.44

15.37

17.22

18.24

35.4

11.03

40.11

12.22

40.75

33.29

2-11.4

13.56

6.15

7.86

21.01

21.85

6.89

frozen

2.61

2.7

13.37

5.58

103.3

35.75

30.89

25.75

266.86

136.75

98.76

72.14

24.42

310.7

Measurement 1 1

Date

06/12/98

06/11/98

06/11/98

06/11/98

06/11/98

06/11/98

06/11/98

06/1 1/98

06/11/98

06/1 1/98

06/1 1/98

06/12/98

06/11/98

06/12/98

06/1 1/98

06/1 1/98

06/1 1/98

06/11/98

06/1 1/98

06/11/98

06/1 1/98

06/11/98

06/1 1/98

06/1 1/98

06/11/98

06/11/98

06/11/98

06/1 1/98

06/12/98

06/1 1/98

06/1 1/98

06/12/98

06/12/98

06/1 1/98

06/1 1/98

WL 

(feet)

7.95

5.32

4.62

15.21

9.49

18.62

35.26

10.96

39.95

7.19

44.4

1

33.68

2-11.4

13.08

6.75

6.99

21.67

22.49

7.31

1.72

2.98

2.6

13.15

5.62

103.18

35.69

33.21

18.59

267.34

139.10

99

72.19

25.08

310.83

Measurement 12

Date

07/17/98

07/17/98

07/17/98

07/16/98

07/17/98

07/17/98

07/17/98

07/17/98

07/17/98

07/17/98

07/17/98

07/17/98

WL 

(feet)

8.71

5.54

4.87

15.47

6.96

19.47

32.82

11.13

40.04

9.49

42.38

1.53

can no longer b? measured 

due to plumbng changes

07/17/98

07/17/98

07/17/98

07/17/98

07/16/98

07/16/98

07/16/98

07/16/98

07/16/98

07/16/98

07/16/98

07/17/98

07/17/98

07/16/98

07/16/98

07/17/98

07/16/98

07/16/98

07/17/98

07/16/98

07/17/98

07/16/98

2-11.4

13.55

7.14

7.79

22.03

22.88

7.93

2.21

3.11

3.14

13.14

6.15

103.43

35.73

30.8

15.73

268.85

141.49

99.84

72.18

27.67

311.04

HYDROLOGIC AND WATER-QUALITY DATA 17
Table 4. Ground-water levels for selected wells in north-central Park County, Colorado, July 1997-November 

1998 Continued

[WL, water level in feet below or above (-) land surface; MP stickup, height of measuring point above (-) or below land surface; --, no data]

Site 

identifier

GW1

GW2

GW3

GW4

GW5

GW6

GW7

GW8

GW9

GW10

GW11

GW12

GW13 

GW14a

GW14b

GW14c

GW14d

GW15a

GW15b

GW16

GWlVa

GWlVb

GWlVc

GW18

GW19

GW20

GW21

GW22

GW23

GW24

GW25

GW26

GW27

GW28

GW29

Measurement 13

Date

being pumped

--

08/07/98

08/06/98

08/07/98

08/07/98

08/07/98

WL 

(feet)

--

3.75

15.14

6.33

19.26

30.48

Measurement 14

Date

being pumped

09/10/98

09/10/98

09/10/09

09/10/98

09/09/98

09/09/98

WL 

(feet)

4.98

4.41

15.2

9.38

19.84

33.05

Measurement 15

Date

10/19/98

10/19/98

10/19/98

10/20/98

10/19/98

10/19/98

10/19/98

WL 

(feet)

9.47

5.46

4.70

15.48

11.51

20.51

30.99

Measurement 16

Date

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

WL 

(feet)

8.41

5.09

4.32

15.43

11.85

21.13

30.18

refused access home now occupied

08/7/98

08/7/98

08/07/98

08/07/98

40.28

7.25

42.04

0.58

09/09/98

09/09/98

09/09/98

09/09/98

can no longer be measured due to plumbing changes 

08/07/98 2-10.71 09/10/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/06/98

08/07/98

080/7/98

080/6/98

08/06/98

being pumped

--

08/07/98

08/06/98

08/07/98

08/07/98

080/7/98

13.12

6.3

7.68

21.61

22.53

7.48

1.78

2.85

2.66

13.03

5.78

103.57

35.71

30.7

--

3.75

15.14

6.33

19.26

30.48

09/09/98

09/09/98

09/09/98

09/09/98

09/09/98

09/09/98

09/09/98

09/09/98

09/09/98

09/10/98

09/09/98

09/09/98

09/10/98

09/10/98

09/09/98

09/10/98

09/10/98

09/09/98

09/09/98

09/09/98

09/10/98

40.64

10.49

52.57

2.56

2-10.71

13.35

6.9

7.85

22.04

22.89

8.07

2.51

3.22

3.39

12.05

6.3

107.55

35.86

30.49

14.26

268.38

147.65

96.91

72.21

24.07

312.68

10/19/98

10/19/98

10/19/98

10/20/98

too cold to shut in

10/19/98

10/19/98

10/19/98

10/20/98

10/20/98

10/20/98

10/20/98

10/20/98

10/20/98

10/20/98

10/19/98

10/19/98

10/20/98

10/20/98

10/20/98

10/20/98

10/20/09

10/20/98

10/20/98

10/19/98

10/20/98

41.21

12.85

46.90

3.68

--

13.81

7.48

8.69

22.01

22.84

7.92

2.10

2.93

3.04

12.50

6.88

104.32

35.67

30.46

16.49

268.13

142.45

96.24

72.71

25.54

314.83

11/18/98

11/18/98

11/18/98

11/23/98

too cold to shut in

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

11/18/98

1 1/23/98

1 1/23/98

11/23/98

1 1/23/98

11/23/98

1 1/23/98

11/18/98

11/18/98

--

41.18

13.03

44.15

2.56

13.77

7.18

8.92

21.61

22.4?

6.67

1.81

2.5:

2.71

12 AC

6.5?

102.71

35.66

30.5*

21.2?

268.42

144.2°

96.17

72.28

25.99

-

'Measured with 100-pound-per-square-inch gage. 

2Measured with 15 pound-per-square-inch gage.

18 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 5. Water-quality data for site SW1, Tarryall Creek below Park Gulch near Como, Colorado, April 1997-September 1998

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; H, hydrogen; 

O, oxygen; PER MIL, per thousand; , no data; <, less than]

DATE

APR

17

MAY

21

JUN

10

JUL

25

AUG

13

SEP

18

OCT

30

NOV

26

DEC

18

JAN

22

FEE

10

MAR

16

APR

10

MAY

13

JUN

10

JUL

20

AUG

06

SEP

08

1997

1998

TIME

1130

0910

0920

0850

1120

0750

1300

0910

0840

1000

1130

0920

1210

1000

1045

1320

1030

1410

DIS- PH 

CHARGE, SPE- WATER HARD- MAGNE- POTASINST. CIFIC WHOLE NESS CALCIUM SIUM, SODIUM, SIUM, 

CUBIC CON- FIELD TEMPER- OXYGEN, TOTAL DIS- DIS- DIf- DISFEET DUCT- (STAND- ATURE DIS- (MG/L SOLVED SOLVED SOLVED SOLVED 

PER ANCE ARD WATER SOLVED AS (MG/L (MG/L (MG/L (MG/L 

SECOND (US/CM) UNITS) (DEG C) (MG/L) CAC03 ) AS CA) AS MG) AS NA) AS K)

7.

53

144

29

32

16

16

7.

5.

3.

3.

3.

6.

22

19

12

28

12

BICARBONATE

WATER

DIS IT

DATE

APR 1997

17. ..

MAY

21. ..

JUN

10. ..

JUL

25. . .

AUG

13. ..

SEP

18. ..

OCT

30. ..

NOV

26. . .

DEC

18. ..

JAN 1998

22. ..

FEE

10. . .

MAR

16. ..

APR

10. . .

MAY

13. ..

JUN

10. ..

JUL

20. ..

AUG

06. . .

SEP

08. ..

FIELD

MG/L AS

HC03

138

106

121

117

--

113

109

126

107

109

122

106

144

85

122

98

122

101

.8 270 8.0

193 8.2

234 8.5

199 8.3

196 8.4

213 8.2

208 8.2

.2 224 8.1

.2 230 7.7

.1 221 7.8

,5 227 7.8

,0 232 8.0

.4 336 8.3

206 8.2

231 8.2

201 8.5

222 8.2

205 8.5

ALKALINITY

WAT DIS SULFATE

TOT IT DISFIELD SOLVED

MG/L AS (MG/L

CAC03 AS S04)

113 35

87 13

99 19

96 9.5

81 11

95 13

89 16

103 18

88 17

89 16

100 16

87 21

118 45

70 18

100 15

84 11

100 13

89 12

9.3

5.6

7.5

12.7

10.5

8.8

0.5

0.0

0.0

0.0

0.0

0.0

3.6

7.5

7.4

18.0

15.5

17.4

CHLORIDE,

DISSOLVED

(MG/L

AS CL)

.9

.4

.5

.2

.2

.4

.6

.5

.6

.5

.3

2.0

1.7

.5

.3

.2

.2

.3

9.0 120

9.1 88

8.1 110

7.4 95

8.4 93

8.5 100

9.6 94

9.2 110

9.0 110

9.0 110

8.5 99

8.4 100

9.8 140

94

8.4 110

7.5 95

7.9 100

7.4 96

FLUO- SILICA,

RIDE, DISDIS- SOLVED

SOLVED (MG/L

(MG/L AS

AS F) SI02)

.1 6.7

<.l 9.1

.1 11

<.l 8.5

<.l 8.0

<.l 8.0

<.l 8.1

<.l 8.6

<.l 8.2

<.l 8.3

<.l 8.2

<.l 7.7

.2 8.1

<.l 7.5

.1 10

<.l 8.5

.1 8.7

<.l 7.8

34

27

32

30

30

32

29

33

32

33

31

30

39

28

35

30

32

30

SOLIDS,

RESIDUE

AT 180

DEG. C

DISSOLVED

(MG/L)

161

112

148

120

120

126

126

129

132

126

123

153

202

123

148

129

132

131

7.3

5.2

6.8

4.8

4.6

5.5

5.4

6.3

5.9

5.9

5.4

6.6

10

5.5

5.8

5.1

5.6

5.1

NITROGEN,

NITRITE

DISSOLVED

(MG/L

AS N)

< . 01

< . 01

< . 01

< . 01

< . 01

< . 01

< . 01

< . 01

< . 01

.01

< . 01

< . 01

< . 01

< . 01

.01

< . 01

< . 01

< . 01

7.1

2.8

4.7

2.5

2.6

3.0

3.5

4.4

3.6

3.4

3.3

3.9

12

4.1

3.5

3.0

3.7

3.0

NITFOGEN,

N02+NC3

DISSOLVED

(MG/L

AS N)

.06

<-05

<.05

<.05

<.05

<-05

.12

<.05

<.05

.05

<.05

.25

<.05

<.05

<.05

<.05

<-05

<.05

1.1

1.0

1.1

.7

.6

.8

.8

.9

.8

.8

.8

3.9

1.2

.8

1.0

.8

.4

.8

NITROGEN,

AMMONIA

DISSOLVED

(MG/L

AS N)

< . 01

< . 01

< . 01

< . 01

< . 01

< . 01

<.02

<.02

<.02

<.02

<.02

.13

.03

.03

.06

.03

.04

<.02

HYDROLOGIC AND WATER-QUALITY DATA 19
Table 5. Water-quality data for site SW1, Tarryall Creek below Park Gulch near Como, Colorado, April 1997-September 1998- 

Continued

US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; H, hydrogen; 

O, oxygen; PER MIL, per thousand; , no data; <, less than]

DATE

APR 1997

17. ..

MAY

21. . .

JUN

10. ..

JUL

25. . .

AUG

13. ..

SEP

18. ..

OCT

30. . .

NOV

26. . .

DEC

18. ..

JAN 1998

22. ..

FEE

10. . .

MAR

16. . .

APR

10. . .

MAY

13. ..

JUN

10. ..

JUL

20. . .

AUG

06. . .

SEP

08. ..

DATE

APR 1997

17. ..

MAY

21. . .

JUN

10. . .

JUL

25. . .

AUG

13. ..

SEP

18. . .

OCT

30. . .

NOV

26. . .

DEC

18. . .

JAN 1998

22. ..

FEE

10. . .

MAR

16. . .

APR

10. . .

MAY

13. ..

JUN

10. . .

JUL

20. . .

AUG

06. . .

SEP

08. . .

NITRO- NITROGEN, AM- GEN, AMMONIA + MONIA + PHOSORGANIC ORGANIC PHORUS

TOTAL DIS. TOTAL

(MG/L (MG/L (MG/L

AS N) AS N) AS P)

<.2 <.2 .02

.5 <.2 .09

.4 .3 <.01

< .2 < . 2 < . 01

.2 <.2 .02

< .2 < . 2 < . 01

.2 <.l .04

<.l <. 1 .01

.2 <.l .03

< . 1 < . 1 < . 01

< . 1 < . 1 < . 01

.5 .5 .02

.2 .1 .03

.2 < . 1 < . 01

.3 .3 .02

.2 .1 <.01

.2 .2 < . 01

.1 <.l <.01

CHROCADMIUM MIUM, COBALT,

DIS- DIS- DISSOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L

AS CD) AS CR) AS CO)

<1 1 <1

<1 2 <1

<1 2 <1

<1 2 <1

<1 <1 <1

<1 <1 <1

<1 2 <1

<1 1 <1

<1 <1 <1

<1 2 <1

<1 1 <1

<1 1 <1

<1 2 <1

<1 <1 <1

<1 1 <1

<1 1 <1

<1 <1 <1

<1 3 <1

PHOSPHOS- PHORUS

PHORUS ORTHO,

DIS- DISSOLVED SOLVED

(MG/L (MG/L

AS P) AS P)

< . 01 < . 01

< . 01 < . 01

< . 01 < . 01

< . 01 < . 01

< . 01 < . 01

< . 01 < . 01

.02 <.01

<.01 .01

<.01 .01

.01 <.01

<.01 .02

.01 .01

<.01 .02

< . 01 < . 01

< . 01 < . 01

<.01 .01

<.01 .01

.02 <.01

COPPER, IRON,

DIS- DISSOLVED SOLVED

(UG/L (UG/L

AS CU) AS FE)

1 72

2 68

1 42

1 110

1 110

<1 58

<1 170

<1 130

<1 17

<1 73

<1 69

1 69

<1 65

<1 97

1 82

<1 110

<1 95

<1 96

ALUM- ANTIINUM, MONY,

DIS- DISSOLVED SOLVED

(UG/L (UG/L

AS AL) AS SB)

1 <1

3 <1

3 <1

3 <1

2 <1

2 <1

7 <1

4 <1

<1 <1

3 <1

3 <1

2 <1

4 <1

2 <1

4 <1

5 <1

5 <1

4 <1

MANGALEAD, NESE,

DIS- DISSOLVED SOLVED

(UG/L (UG/L

AS PB) AS MN)

<1 16

<1 10

<1 6

<1 9

<1 9

<1 9

<1 14

<1 12

<1 14

<1 9

<1 10

<1 58

<1 24

<1 10

<1 9

<1 9

<1 9

<1 7

ARSENIC

DISSOLVED

(UG/L

AS AS)

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<X

MOLYBDENUM,

DISSOLVED

(UG/L

AS MO)

<1

1

1

1

1

<1

<1

<1

1

<1

<1

1

1

1

1

1

<1

1

BARIUM,

DISSOLVED

(UG/L

AS BA)

70

60

57

75

69

78

71

78

80

84

81

77

68

68

63

71

73

78

NICKEL,

DISSOLVED

(UG/L

AS NI)

<1

1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

BERYLLILT',

DISSOLVED

(UG/L

AS BE)

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<X

SELENIUM,

DISSOLVED

(UG/L

AS SE)

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

<1

20 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado 

April 1997-November 1998
Table 5. Water-quality data for site SW1, Tarryall Creek below Park Gulch near Como, Colorado, April 1997-September 1998- 

Continued

US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; H, hydrogen; 

O, oxygen; PER MIL, per thousand; --, no data; <, less than]

DATE

APR 1997

17 ...

MAY

21. . .

JUN

10. ..

JUL

25. ..

AUG

13. ..

SEP

18. . .

OCT

30. ..

NOV

26. ..

DEC

18. . .

JAN 1998

22. ..

FEE

10. ..

MAR

16. ..

APR

10. ..

MAY

13. ..

JUN

10. . .

JUL

20. ..

AUG

06. ..

SEP

08. ..

URANIUM

SILVER, NATURAL ZINC, CARBON,

DIS- DIS- DIS- ORGANIC

SOLVED SOLVED SOLVED TOTAL

(UG/L (UG/L (UG/L (MG/L

AS AG) AS U) AS ZN) AS C)

<1 <1 <1

<1 1 1

<1 1 <1

<1 <1 1

<1 <1 1

<1 <1 2 1.7

<1 <1 <1

<1 <1 <1 2.0

<1 <1 <1 1.4

<1 <1 <1 1.4

<1 <1 <1 1.4

<1 <1 1 9.2

<1 2 <1 3.4

<1 <1 <1 5.2

<1 3 <1 5.6

<1 <1 <1 3.3

<1 <1 <1 3.6

<1 <1 <1 2.1

CARBON,

ORGANIC

DISSOLVED

(MG/L

AS C)

--

--

--

--

--

1.8

--

1.3

1.1

.8

1.1

8.0

2.7

2.3

4.6

2.2

2.7

1.8

SEDIMENT,

SUSPENDED

(MG/L)

--

91

15

17

15

8

36

7

3

--

4

5

6

34

16

9

14

4

SEDIMENT,

DISCHARGE,

SUSPENDED

(T/DAY)

--

13

5.8

1.3

1.2

.32

1.6

.14

.04

--

.04

.04

.10

2.0

.82

.28

1.1

.13

SED.

SUSP.

SIEVE

DIAM.

% FINER

THAN

.062 MM

--

69

50

89

87

85

86

82

83

--

86

91

84

89

89

84

85

79

H-2 / 0-18 /

H-l 0-16

STABLE STABLE

DIAM. ISOTOPE ISOTOPE

RATIC RATIO

PER PER

MIL MIL

-125 -16.75

HYDROLOGIC AND WATER-QUALIT' DATA 21
Table 6. Water-quality data for sites on Park Gulch (SW2-SW5), north-central Park County, Colorado, September 1997

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; 

<, less than; , no data]

DIS- PH

CHARGE, SPE- WATER MAGNE- POTAS- ALKAINST. CIFIC WHOLE CALCIUM SIUM, SODIUM, SIUM, LINITY

CUBIC CON- FIELD TEMPER- OXYGEN, DIS- DIS- DIS- DIS- LAB

FEET DUCT- (STAND- ATURE DIS- SOLVED SOLVED SOLVED SOLVED (MG/L

PER ANCE ARD WATER SOLVED (MG/L (MG/L (MG/L (MG/L AS

SECOND (US/CM) UNITS) (DEG C) (MG/L) AS CA) AS MG) AS NA) AS K) CAC03)

SW2 - PARK GULCH ABOVE COMO, CO (LAT 39 19 22N LONG 105 53 54W)

SEP 1997

17... 0840 .03 346 8.0 5.2 7.8 51 8.4 10 .6 158

SW3 - PARK GULCH BELOW COMO, CO (LAT 39 18 47N LONG 105 53 04W)

SEP 1997

17... 1010 .01 3220 7.3 7.6 4.9 380 240 120 2.0 326

SW4 - PARK GULCH ABOVE KING MINE NEAR COMO, CO (LAT 39 17 55N LONG 105 51 56W)

SEP 1997

17... 1150 .01 2880 8.2 13.0 8.4 270 230 170 2.3 418

SW5 - PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

SEP 1997

17... 1420 .03 788 8.0 20.3 6.5 75 29 52 1.8 296

	SOLIDS, NITRO- NITRO- NITRO- NITRO- NITROCHLO- FLUO- SILICA, RESIDUE GEN, GEN, GEN, GEN,AM- GEN,AMSULFATE RIDE, RIDE, DIS- AT 180 NITRITE N02+N03 AMMONIA MONIA + MONIA + P'fOSDIS- DIS- DIS- SOLVED DEG. C DIS- DIS- DIS- ORGANIC ORGANIC PHORUS

SOLVED SOLVED SOLVED (MG/L DIS- SOLVED SOLVED SOLVED TOTAL DIS. TOTAL

(MG/L (MG/L (MG/L AS SOLVED (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L

AS S04) AS CL) AS F) SI02) (MG/L) AS N) AS N) AS N) AS N) AS N) AS P)

SW2 - PARK GULCH ABOVE COMO, CO (LAT 39 19 22N LONG 105 53 54W)

SEP 1997

17... 20 2.6 .2 18 218 <.01 <.05 <.01 <.2 <.2 <.01

SW3 - PARK GULCH BELOW COMO, CO (LAT 39 18 47N LONG 105 53 04W)

SEP 1997

17... 2000 .6 .3 17 3090 <.01 <.05 .08 .4 .3 .04

SW4 - PARK GULCH ABOVE KING MINE NEAR COMO, CO (LAT 39 17 55N LONG 105 51 56W)

SEP 1997

17... 1600 24 .3 9.0 2700 <.01 <.05 .06 .6 .6 .01

SW5 - PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

SEP 1997

17... 140 3.5 .6 15 503 <.01 <.05 .04 .5 .3 .06

22 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado 

April 1997-November 1998
Table 6. Water-quality data for sites on Park Gulch (SW2-SW5), north-central Park County, Colorado, September 1997- 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per Tier; 

<, less than; --, no data]

PHOSPHOS- PHORUS ALUM- ANT I- BERYL- CHROPHORUS ORTHO, INUM, MONY, ARSENIC BARIUM, LIUM, CADMIUM MIUM, COBALT,

DIS- DISSOLVED SOLVED

(MG/L (MG/L

AS P) AS P)

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L

AS AL) AS SB) AS AS) AS BA) AS BE) AS CD) AS CR) AS CO)

SW2 - PARK GULCH ABOVE COMO, CO (LAT 39 19 22N LONG 105 53 54W)

SW3 - PARK GULCH BELOW COMO, CO (LAT 39 18 47N LONG 105 53 04W) 

<.01 <.01 3 <2 <1 58 <2 <2 

SW4 - PARK GULCH ABOVE KING MINE NEAR COMO, CO (LAT 39 17 55N LONG 105 51 56W)

.01 .01 2 <2 <1 33 <2 <2 <2

SEP 1997 

17...

SEP 1997 

17. ..

SEP 1997 

17 ...

<2

SW5 - PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W) 

SEP 1997

.04 .03 <1 <1 60 <1 <1

<2

<1

MANGA- MOLYB- SELE- URANIUM

COPPER, IRON, LEAD, NESE, DENUM, NICKEL, NIUM, SILVER, NATURAL ZINC, 

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVEE SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L

AS CU) AS FE) AS PB) AS MN) AS MO) AS NI) AS SE) AS AG) AS U) AS ZN)

SW2 - PARK GULCH ABOVE COMO, CO (LAT 39 19 22N LONG 105 53 54W)

SEP 1997 

17... <1 61 <1 165 <1 <1 <1 <1

SW3 - PARK GULCH BELOW COMO, CO (LAT 39 18 47N LONG 105 53 04W)

SEP 1997 

17... 4 4600 <2 1840 <2 6 <1 <2

SEP 1997

17. ..

SEP 1997 

17...

<2

SW4 - PARK GULCH ABOVE KING MINE NEAR COMO, CO (LAT 39 17 55N LONG 105 51 56W)

4 12 <2 2720 <2 5 <1 <2 <2 

SW5 - PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

cl 45 <1 51 <1 <1 <1 <1 <1

<1

HYDROLOGIC AND WATER-QUALITY DATA 23
Table 7. Water-quality data for sites on selected tributaries (SW6-SW8) in north-central Park County, Colorado, May 19?°

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; H, hydrogen; 

O, oxygen; PER MIL, per thousand; --, no data; <, less than]

TIME

DISCHARGE,

INST.

CUBIC

FEET

PER

SPECIFIC

CONDUCTANCE

PH

WATER

WHOLE

FIELD

(STANDARD

CALCIUM 

DISMAGNESIUM, SODIUM, 

DIS- DISATURE DIS- SOLVED SOLVED SOLVED

WATER SOLVED (MG/L (MG/L (MG/L

SECOND (US/CM) UNITS) (DEG C) (MG/L) AS CA) AS MG) AS NA)

POTAS- ALKASIUM, LINITY SU^FATE 

DIS- LAB DISSOLVED (MG/L SOLVED

(MG/L AS (MG/L

AS K) CAC03) AS S04)

SW6 - Tarryall Cr at U.S. 285 nr Como, CO (LAT 39 19 58N LONG 105 52 02W)

MAY 1998 

13... 1210 21 153 8.3 9.9 11.5 22 3.6 1.9 .6 63 12

SW7 - MICHIGAN CREEK ABOVE JEFFERSON, CO. (LAT 39 21 32N LONG 105 50 27W)

MAY 1998 

13... 1445 9.5 92 8.0 13.3 10.5 12 2.0 2.5 .6 38 5.7

SW8 - Jefferson Cr blw Jefferson Lake nr Jefferson, CO (LAT 39 24 53N LONG 105 50 11W)

MAY 1998 

13... 1620 12 59 7.9 12.6 7.0 7.1 1.7 1.3 .8 25 3.3

DATE

	SOLIDS, NITRO- NITRO- NITRO- NITRO- NITROCHLO- FLUO- SILICA, RESIDUE GEN, GEN, GEN, GEN,AM- GEN,AM- PHOSRIDE, RIDE, DIS- AT 180 NITRITE N02+N03 AMMONIA MONIA + MONIA + PHOS- PHORUS 

DIS- DIS- SOLVED DEG. C DIS- DIS- DIS- ORGANIC ORGANIC PHORUS DISSOLVED SOLVED (MG/L DIS- SOLVED SOLVED SOLVED TOTAL DIS. TOTAL SOLVED 

(MG/L (MG/L AS SOLVED (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L 

AS CL) AS F) SI02) (MG/L) AS N) AS N) AS N) AS N) AS N) AS P) AS P)

SW6 - Tarryall Cr at U.S. 285 nr Como, CO (LAT 39 19 58N LONG 105 52 02W)

<.l 6.9 92 <.01 <.05 .03 .2 <.l <.01

SW7 - MICHIGAN CREEK ABOVE JEFFERSON, CO. (LAT 39 21 32N LONG 105 50 27W)

<.l 7.7 59 <.01 <.05 .02 .2 <.l <.01

SW8 - Jefferson Cr blw Jefferson Lake nr Jefferson, CO (LAT 39 24 53N LONG 105 50 11W)

<.l 6.5 38 <.01 .07 .03 .1 <.l <.01

MAY 1998 

13... .3

MAY 1998 

13... .3

MAY 1998 

13... .3

24 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 7. Water-quality data for sites on selected tributaries (SW6-SW8) in north-central Park County, Colorado, May 1998- 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; UG/L, micrograms per liter; H, hydrogen; 

O, oxygen; PER MIL, per thousand; --, no data; <, less than]

PHOSPHORUS ALUM- ANTI- BERYL- CHROORTHO, INUM, MONY, ARSENIC BARIUM, LIUM, CADMIUM MIUM, COBALT, COPPFIR, IRON, 

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED 

DATE (MG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L 

AS P) AS AL) AS SB) AS AS) AS BA) AS BE) AS CD) AS CR) AS CO) AS CU) AS FE)

SW6 - Tarryall Cr at U.S. 285 nr Como, CO (LAT 39 19 58N LONG 105 52 02W)

MAY 1998

13... <.01 2 <1 <1 66 <1 <1 <1 <1 <1 120

SW7 - MICHIGAN CREEK ABOVE JEFFERSON, CO. (LAT 39 21 32N LONG 105 50 27W)

MAY 1998

13... <.01 3 <1 <1 11 <1 <1 <1 <1 <1 440

SW8 - Jefferson Cr blw Jefferson Lake nr Jefferson, CO (LAT 39 24 53N LONG 105 50 11W)

MAY 1998

13... <.01 13 <1 <1 13 <1 <1 <1 <1 <1 100

	H-2 / 0-18 /

MANGA- MOLYB- SELE- URANIUM H-l 0-16

LEAD, NESE, DENUM, NICKEL, NIUM, SILVER, NATURAL ZINC, SEDI- STABLE STABLE

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- MENT, ISOTOPE ISOTOPE

SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SUS- RATIO RATIO

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L FENDED PEP PER

AS PB) AS MN) AS MO) AS NI) AS SE) AS AG) AS U) AS ZN) (MG/L) MIL MIL

SW6 - Tarryall Cr at U.S. 285 nr Como, CO (LAT 39 19 58N LONG 105 52 02W)

MAY 1998

13... <1 20 <1 <1 <1 <1 <1 <1 12 -13C -17.16

SW7 - MICHIGAN CREEK ABOVE JEFFERSON, CO. (LAT 39 21 32N LONG 105 50 27W)

MAY 1998

13... <1 15 <1 <1 <1 <1 <1 <1 6 -12? -16.72

SW8 - Jefferson Cr blw Jefferson Lake nr Jefferson, CO (LAT 39 24 53N LONG 105 50 11W)

MAY 1998

13... <1 5 <1 <1 <1 <1 <1 <1 4 -132 -17.65

HYDROLOGIC AND WATER-QUALITY DATA 25
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; , no data]

MAY 1998 

28. . .

MAY 1998 

07. . .

MAY 1998 

04. . .

MAY 1998 

06. ..

MAY 1998 

06. ..

MAY 1998 

06. ..

MAY 1998 

04. . .

JUN 1998

15. ..

MAY 1998 

05. . .

MAY 1998 

12. ..

MAY 1998 

12. ..

MAY 1998 

05. ..

MAY 1998

14. . .

	PH

SPE- WATER MAGNE- POTAS- ANC

CIFIC WHOLE CALCIUM SIUM, SODIUM, SIUM, UNFLTRD SULFATE

CON- FIELD TEMPER- OXYGEN, DIS- DIS- DIS- DIS- LAB DISDUCT- (STAND- ATURE DIS- SOLVED SOLVED SOLVED SOLVED (MG/L SOLVED

TIME ANCE ARD WATER SOLVED (MG/L (MG/L (MG/L (MG/L AS (MG/L

(US/CM) UNITS) (DEG C) (MG/L) AS CA) AS MG) AS NA) AS K) CAC03) AS S04)

GW4 - 391337105484301 SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W) 

1100 386 7.8 7.8 .5 53 5.2 21 1.1 145 42

GW9 - 392202105493501 SC00807507CBC01 (LAT 39 22 02N LONG 105 49 35W) 

0940 164 7.3 5.8 5.2 20 4.6 7.5 .6 76 7.3

GW13 - 391511105500301 SC00907624CBB01 (LAT 39 15 UN LONG 105 50 03W) 

1100 598 7.8 7.3 .3 93 15 17 1.7 151 130

GW14a - 391631105480404 SC00907508CDA04 (LAT 39 16 31N LONG 105 48 04W) 

1445 278 9.7 9.0 .1 1.0 .005 65 <.l 127 8.3

GWl4b - 391631105480401 SC00907508CDA01 (LAT 39 16 3IN LONG 105 48 04W) 

1200 221 8.3 6.4 .3 22 1.3 23 .4 96 13

GW14c - 391631105480402 SC00907508CDA02 (LAT 39 16 31N LONG 105 48 04W) 

1615 273 8.5 7.6 .2 30 1.4 28 .4 103 29

GW16 - 391625105501001 SC00907613ABB01 (LAT 39 16 25N LONG 105 50 10W) 

1500 1080 7.6 8.8 .9 120 26 98 1.8 293 310

GW25 - 391314105465501 SC00907533CDA01 (LAT 39 13 14N LONG 105 46 55W) 

1030 222 7.7 6.4 2.1 28 6.3 8.2 1.4 108 6.2

GW27 - 391830105500801 SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W) 

1510 344 7.8 7.9 1.1 50 9.6 14 1.1 151 27

GW28 - 391631105461301 SC00907510CCC01 (LAT 39 16 3IN LONG 105 46 13W) 

1350 146 6.6 6.5 6.5 17 3.3 7.0 1.2 48 15

GW29 - 391441105474501 SC00907529ABA01 (LAT 39 14 41N LONG 105 47 45W) 

0945 241 7.6 8.0 .9 32 4.5 8.6 1.0 109 8.0

GW30 - 391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W) 

1200 709 7.1 7.4 .1 180 29 40 2.1 282 350

GW31 - 391602105473801 SC00907517DAB01 (LAT 39 16 02N LONG 105 47 38W) 

1120 156 6.5 6.5 2.5 17 3.5 9.6 .9 71 4.3

CHLORIDE,

nsSOLVED 

(MG/L 

£S CL)

9.2

1.6

21

2.4

3.!

17

2.9

1.6

4.2

17

2.0

26 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; --, no data]

	SOLIDS, NITRO- NITRO- NITRO- NITRO- PHO 0 -

FLUO- SILICA, RESIDUE GEN, GEN, GEN, GEN,AM- PHOS- PHOR'JS ALUMRIDE, BROMIDE DIS- AT 180 NITRITE N02+N03 AMMONIA MONIA + PHORUS ORT*J0, INUM, 

DIS- DIS- SOLVED DEG. C DIS- DIS- DIS- ORGANIC DIS- DIS- DISSOLVED SOLVED (MG/L DIS- SOLVED SOLVED SOLVED DIS. SOLVED SOLVED SOLVED 

DATE (MG/L (MG/L AS SOLVED (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (UG/L 

AS F) AS BR) SI02) (MG/L) AS N) AS N) AS N) AS N) AS P) AS P) AS AL)

MAY 1998 

28. ..

MAY 1998 

07. . .

MAY 1998 

04. . .

MAY 1998 

06. . .

MAY 1998 

06. ..

MAY 1998 

06. ..

MAY 1998 

04. . .

JUN 1998 

15. ..

MAY 1998 

05. ..

MAY 1998 

12. ..

MAY 1998 

12. ..

MAY 1998 

05. . .

MAY 1998 

14. ..

GW4 - 391337105484301 SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W) 

.3 .20 16 243 .01 <.05 <.02 .2 <.01 .02

GW9 - 392202105493501 SC00807507CBC01 (LAT 39 22 02N LONG 105 49 35W) 

.3 .04 24 122 <.01 .36 .04 <.l .10 .08

GW13 - 391511105500301 SC00907624CBB01 (LAT 39 15 UN LONG 105 50 03W) 

.3 .22 9.9 394 <.01 <.05 .05 .2 <.01 <.01

GW14a - 391631105480404 SC00907508CDA04 (LAT 39 16 31N LONG 105 48 04W) 

1.3 .08 13 173 <.01 <.05 .07 <.l .04 .06

GW14b - 391631105480401 SC00907508CDA01 (LAT 39 16 31N LONG 105 48 04W) 

.4 .05 15 144 <.01 <.05 .12 .2 <.01 .02

GW14c - 391631105480402 SC00907508CDA02 (LAT 39 16 31N LONG 105 48 04W) 

.3 .08 13 177 <.01 <.05 .12 .1 <.01 <-01

GW16 - 391625105501001 SC00907613ABB01 (LAT 39 16 25N LONG 105 50 10W) 

.4 .26 13 794 <.01 <.05 .08 .2 <.01 <.01

GW25 - 391314105465501 SC00907533CDA01 (LAT 39 13 14N LONG 105 46 55W) 

.3 -- 12 134 <.01 .19 .04 <.l .02 <.01

GW27 - 391830105500801 SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W) 

.7 .05 13 210 .02 .10 .04 <.l <.01 <.01

GW28 - 391631105461301 SC00907510CCC01 (LAT 39 16 31N LONG 105 46 13W) 

.1 <.01 22 118 <.01 1.0 .08 .4 .15 .14

GW29 - 391441105474501 SC00907529ABA01 (LAT 39 14 41N LONG 105 47 45W) 

.2 .13 21 150 <.01 .63 .07 <.l .04 .03

GW30 - 391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W) 

.3 .16 15 850 .01 <.05 .08 <.l <.01 <.01

GW31 - 3391602105473801 SC00907517DAB01 (LAT 39 16 02N LONG 105 47 38W) 

.2 .05 26 116 <.01 .67 .02 <.l .14 .15

14

10

HYDROLOGIC AND WATER-QUALIT' DATA 27
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; , m data]

ANT I- BERYL- CHRO- MANGAMONY, ARSENIC BARIUM, LIUM, CADMIUM MIUM, COBALT, COPPER, IRON, LEAD, NESE,

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L

AS SB) AS AS) AS BA) AS BE) AS CD) AS CR) AS CO) AS CU) AS FE) AS PB) AS MN)

DATE

MAY 1998 

28...

MAY 1998 

07. ..

MAY 1998 

04. . .

MAY 1998 

06...

MAY 1998 

06...

MAY 1998 

06...

MAY 1998 

04...

JUN 1998 

15...

MAY 1998 

05...

MAY 1998 

12. ..

MAY 1998 

12. ..

MAY 1998 

05...

MAY 1998

GW4 - 391337105484301 SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W)

<1 <1 78 <1 <1 2 <1 <1 200 <1 146

GW9 - 392202105493501 SC00807507CBC01 (LAT 39 22 02N LONG 105 49 35W)

<1 <1 18 <1 <1 1 <1 <1 <10 <1 14

GW13 - 391511105500301 SC00907624CBB01 (LAT 39 15 UN LONG 105 50 03W)

<1 <1 28 <1 <1 3 <1 <1 <10 <1 15 

GW14a - 391631105480404 SC00907508CDA04 (LAT 39 16 31N LONG 105 48 04W)

GW14b - 391631105480401 SC00907508CDA01 (LAT 39 16 31N LONG 105 48 04W)

<1 <1 50 <1 <1 <1 <1 <1 31 <1 8

GW14c - 391631105480402 SC00907508CDA02 (LAT 39 16 31N LONG 105 48 04W)

<1 <1 69 <1 <1 <1 <1 <1 12 <1 12

GW16 - 391625105501001 SC00907613ABB01 (LAT 39 16 25N LONG 105 50 10W)

<1 <1 20 <1 <1 7 <1 <1 160 <1 77

GW25 - 391314105465501 SC00907533CDA01 (LAT 39 13 14N LONG 105 46 55W)

<1 <1 44 <1 <1 1 <1 2 <10 <1 <1

GW27 - 391830105500801 SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W)

<1 <1 4 <1 <1 3 <1 <1 <10 <1 8

GW28 - 391631105461301 SC00907510CCC01 (LAT 39 16 31N LONG 105 46 13W)

<1 <1 8 <1 <1 <1 <1 46 10 1 5

GW29 - 391441105474501 SC00907529ABA01 (LAT 39 14 41N LONG 105 47 45W)

<1 <1 5 <1 <1 2 <1 1 <10 <1 3

GW30 - 391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W)

<1 <1 26 <1 <1 7 <1 <1 850 <1 588

GW31 - 3391602105473801 SC00907517DAB01 (LAT 39 16 02N LONG 105 47 38W)

<1 <1 5 <1 <1 <1 <1 5 <10 <1 <1

28 Hydrologlc and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unflltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less then; , no data]

<1

DATE

MAY 1998 

28. ..

MAY 1998 

07 ...

MAY 1998 

04. ..

MAY 1998

06. . . 11

MAY 1998 

06. . .

MAY 1998 

06. . .

MAY 1998 

04. ..

JUN 1998 

15...

MAY 1998 

05. . .

MAY 1998 

12...

MAY 1998 

12. ..

MAY 1998 

05...

MAY 1998 

14...

MOLYB- SELEDENUM, NICKEL, NIUM, SILVER, ZINC, 

DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED 

(UG/L (UG/L (UG/L (UG/L (UG/L

H-2 / 0-18 /

URANIUM CARBON, H-l 0-16

NATURAL ORGANIC STABLE STABLE

RADON DIS- DIS- ISOTOPE ISOTOPE

222 TRITIUM SOLVED SOLVED RATIO RATIO

TOTAL TOTAL (UG/L (MG/L PE^. PER

AS MO) AS NI) AS SE) AS AG) AS ZN) (PCI/L) (PCI/L) AS U) AS C) MIL MIL

GW4 - 391337105484301 SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W) 

<1 <1 <1 <1 2900 -- <1 3.1 

GW9 - 392202105493501 SC00807507CBC01 (LAT 39 22 02N LONG 105 49 35W) 

1 1 <1 1 6400 -- 2 1.4 

GW13 - 391511105500301 SC00907624CBB01 (LAT 39 15 UN LONG 105 50 03W) 

<1 <1 <1 77 2500 8.6 17 2.1 

GW14a - 391631105480404 SC00907508CDA04 (LAT 39 16 31N LONG 105 48 04W) 

<1 <1 <1 <1 1900 <2.5 <1 .2 -87.4 -11.25 

GW14b - 391631105480401 SC00907508CDA01 (LAT 39 16 31N LONG 105 48 04W) 

<1 <1 <1 <1 3300 <2.5 2 1.2 -95.4 -12.47 

GW14c - 391631105480402 SC00907508CDA02 (LAT 39 16 31N LONG 105 48 04W) 

<1 <1 <1 <1 4200 -- 2 1.0 

GW16 - 391625105501001 SC00907613ABB01 (LAT 39 16 25N LONG 105 50 10W) 

1 <1 <1 <1 6300 8.0 4 2.3 

GW25 - 391314105465501 SC00907533CDA01 (LAT 39 13 14N LONG 105 46 55W) 

<1 <1 <1 2 -- -- 19 .5 

GW27 - 391830105500801 SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W) 

<1 2 <1 <1 4900 -- 17 .7 

GW28 - 391631105461301 SC00907510CCC01 (LAT 39 16 31N LONG 105 46 13W) 

1 <1 <1 10 1900 -- <1 9.2 -109 

GW29 - 391441105474501 SC00907529ABA01 (LAT 39 14 41N LONG 105 47 45W) 

<1 1 <1 7 4200 -- 6 .6 -113 

GW30 - 391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W) 

1 <1 <1 <1 2500 -- 4 1.3 

GW31 - 3391602105473801 SC00907517DAB01 (LAT 39 16 02N LONG 105 47 38W) 

<1 <1 <1 <1 14000 3.5 <1 1.8 -108 -13.95

-14.34

HYDROLOGIC AND WATER-QUALIT' DATA 29
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; , no data]

	PH

SPE- WATER MAGNE- POTAS- ANC CHLOCIFIC WHOLE CALCIUM SIUM, SODIUM, SIUM, UNFLTRD SULFATE RIDE,

CON- FIELD TEMPER- OXYGEN, DIS- DIS- DIS- DIS- LAB DIS- EISDUCT- (STAND- ATURE DIS- SOLVED SOLVED SOLVED SOLVED (MG/L SOLVED SOLVED

DATE TIME ANCE ARD WATER SOLVED (MG/L (MG/L (MG/L (MG/L AS (MG/L (MG/L

(US/CM) UNITS) (DEG C) (MG/L) AS CA) AS MG) AS NA) AS K) CAC03) AS S04) f>S CL)

JUN 1998 

17... 0950

JUN 1998 

17... 1335

JUN 1998 

16... 1130

AUG 1998 

21... 1025

MAY 1998 

28... 1450

MAY 1998 

14... 1515

MAY 1998 

11... 1400

MAY 1998 

11... 1700

GW32a - 391452105483501 SC00907519DDA1 (LAT 39 14 52N LONG 105 48 35W) 

214 8.2 6.5 .3 26 3.0 15 1 95 9.8 3.9

GW32b - 391452105483502 SC00907519DDA2 (LAT 39 14 52N LONG 105 48 35W) 

209 8.0 6.6 .3 26 3.1 13 .9 91 11 3.9

GW32c - 391452105483503 SC00907519DDA3 (LAT 39 14 52N LONG 105 48 35W) 

219 8.1 5.8 1.2 26 3.3 15 1 93 12 4.2

GW32d - 391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W) 

516 7.4 -- .1 6.8 1.5 110 1.9 178 50 2.6

SPG1 - 391449105482801 SC00907520CCC01 (LAT 39 14 49N LONG 105 48 28W) 

203 7.2 7.2 .6 23 3.4 15 1 87 11 4.0

SPG2 - 391216105484801 SC01007506DCA01 (LAT 39 12 16N LONG 105 48 48W) 

619 6.3 3.4 5.1 130 24 54 <.l 108 360 25

SPG3 - 391320105464000 SC01007533DBD01 (LAT 39 13 20N LONG 105 46 40W) 

131 6.6 6.3 6.6 15 2.6 6.3 .6 50 11 1.4

SPG 4 - 391438105483600 SC00907530DDA (LAT 39 14 04N LONG 105 48 30W) 

267 7.4 2.6 1.8 30 3.9 22 1.0 130 7.8 3.9

30 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less thrn; --, no data]

	SOLIDS, NITRO- NITRO- NITRO- NITRO- PH07-

FLUO- SILICA, RESIDUE GEN, GEN, GEN, GEN,AM- PHOS- PHOR'JS ALUMRIDE, BROMIDE DIS- AT 180 NITRITE N02+N03 AMMONIA MONIA + PHORUS ORT'IO, INUM, 

DIS- DIS- SOLVED DEG. C DIS- DIS- DIS- ORGANIC DIS- DIS- DISSOLVED SOLVED (MG/L DIS- SOLVED SOLVED SOLVED DIS. SOLVED SOLVED SOLVED 

(MG/L (MG/L AS SOLVED (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (UG/L 

AS F) AS BR) SI02) (MG/L) AS N) AS N) AS N) AS N) AS P) AS P) AS AL)

DATE

JUN 1998

II. . .

JUN 1998 

17. ..

JUN 1998 

16. . .

AUG 1998 

21. ..

MAY 1998 

28. ..

MAY 1998 

14. . .

MAY 1998 

11. . .

MAY 1998 

11. ..

GW32a - 391452105483501 SC00907519DDA1 (LAT 39 14 52N LONG 105 48 35W) 

.4 .09 13 130 <.01 <.05 .04 <.l <.01 .01

GW32b - 391452105483502 SC00907519DDA2 (LAT 39 14 52N LONG 105 48 35W) 

.4 .09 12 130 <.01 <-05 .03 <.l <.01 .01

GW32c - 391452105483503 SC00907519DDA3 (LAT 39 14 52N LONG 105 48 35W) 

.4 .08 14 137 <.01 .31 .03 <.l <.01 .01

GW32d - 391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W) 

.8 .04 26 442

SPG1 - 391449105482801 SC00907520CCC01 (LAT 39 14 49N LONG 105 48 28W) 

.4 .11 17 130 .01 .07 .02 <.l <.01 <.01

SPG2 - 391216105484801 SC01007506DCA01 (LAT 39 12 16N LONG 105 48 48W) 

.5 .17 34 797 <.01 <.05 1.1 2.2 .12 .14

SPG3 - 391320105464000 SC01007533DBD01 (LAT 39 13 20N LONG 105 46 40W) 

.1 <.01 21 98 <.01 .25 .06 .2 .08 .07

SPG 4 - 391438105483600 SC00907530DDA (LAT 39 14 04N LONG 105 48 30W) 

.3 .09 15 160 <.01 <.05 .08 <.l .01 <.C1

2460

128

HYDROLOGIC AND WATER-QUALITY DATA 31
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unflltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; , no data]

JUN 1998 

17. ..

JUN 1998 

17. ..

JUN 1998 

16. ..

AUG 1998 

21. . .

MAY 1998 

28. . .

MAY 1998 

14. . .

MAY 1998 

11. ..

MAY 1998 

11. ..

ANTIMONY, ARSENIC

DIS- DISSOLVED SOLVED 

(UG/L (UG/L 

AS SB) AS AS)

<1

GW32a -

GW32b -

GW32c -

GW32d - 

<1 4

SPG1 - 

<1 <1

SPG2 - 

<1 2

SPG3 - 

<1 <1

SPG 4 

<1 <1

BERYL- CHROBARIUM, LIUM, CADMIUM MIUM, COBALT, COPPER, IRON, LEAD,

DIS- DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L

AS BA) AS BE) AS CD) AS CR) AS CO) AS CU) AS FE) AS PB)

391452105483501 SC00907519DDA1 (LAT 39 14 52N LONG 105 48 35W) 

17 <1 <1 1 <1 <1 33 <1

391452105483502 SC00907519DDA2 (LAT 39 14 52N LONG 105 48 35W) 

12 <1 <1 <1 <1 <1 17 <1

391452105483503 SC00907519DDA3 (LAT 39 14 52N LONG 105 48 35W) 

10 <1 <1 <1 <1 <1 <10 <1

391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W)

26 4 <1 53 2 1 11000 8 

391449105482801 SC00907520CCC01 (LAT 39 14 49N LONG 105 48 28W)

3 <1 <1 1 <1 <1 33 <1 

391216105484801 SC01007506DCA01 (LAT 39 12 16N LONG 105 48 48W)

32 <1 <1 1 7 1 32000 <1 

391320105464000 SC01007533DBD01 (LAT 39 13 20N LONG 105 46 40W)

4 <1 <1 <1 <1 2 24 <1 

- 391438105483600 SC00907530DDA (LAT 39 14 04N LONG 105 48 30W)

13 <1 <1 1 <1 <1 51 <1

I'ANGA1TESE, 

DISSOLVED 

(UG/L 

AS MN)

155

12

672

71

246

133

32 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 8. Water-quality data for selected wells and springs in north-central Park County, Colorado, May-August 1998 

Continued

[US/CM, microsiemens per centimeter at 25 degrees Celsius; DEG C, degrees Celsius; MG/L, milligrams per liter; ANC, acid neutralizing capacity, 

UNFLTRD, unfiltered; UG/L, micrograms per liter; PCI/L, picocuries per liter; H, hydrogen; O, oxygen; PER MIL, per thousand; <, less than; , no data]

DATE

MOLYBDENUM, NICKEL, 

DIS- DISSELENIUM,

DISSILVER, 

DISZINC,DISSOLVED SOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L

AS MO) AS NI) AS SE) AS AG) AS ZN) (PCI/L) (PCI/L)

RADON

222 

TOTAL

TRITIUM 

TOTAL

	H-2 / 0-18 /

URANIUM CARBON, H-l 0-16

NATURAL ORGANIC STABLE STABLE

DIS- DIS- ISOTOPE ISOTOPE

SOLVED SOLVED RATIO RATIO

(UG/L (MG/L PER PER

AS U) AS C) MIL MIL

JUN 1998 

17... 28

JUN 1998 

17... 18

JUN 1998

16... 17

AUG 1998

21... 29

MAY 1998 

28... 14

MAY 1998 

14... <1

MAY 1998

11... <1

MAY 1998 

11... 2

GW32a - 391452105483501 SC00907519DDA1 (LAT 39 14 52N LONG 105 48 35W) 

<1 <1 <1 1 5600 <2.5 13 .9 

GW32b - 391452105483502 SC00907519DDA2 (LAT 39 14 52N LONG 105 48 35W) 

<1 <1 <1 <1 -- -- 5 .4 

GW32c - 391452105483503 SC00907519DDA3 (LAT 39 14 52N LONG 105 48 35W) 

<1 <1 <1 <1 -- -- 11 .5 

GW32d - 391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W) 

5 <1 <1 264 -- <2.5 9

SPG1 - 391449105482801 SC00907520CCC01 (LAT 39 14 49N LONG 105 48 28W) 

1 1 <1 3 4900 7.7 7 .7

SPG2 - 391216105484801 SC01007506DCA01 (LAT 39 12 16N LONG 105 48 48W) 

4 <1 <1 2 -- -- 2 15 -103 -13.19

SPG3 - 391320105464000 SC01007533DBD01 (LAT 39 13 20N LONG 105 46 40W) 

<1 <1 <1 <1 -- -- 3 5.5 -113 -14.21

SPG 4 - 391438105483600 SC00907530DDA (LAT 39 14 04N LONG 105 48 30W) 

<1 <1 <1 <1 -- <2.5 <1 1.8 -98.3

HYDROLOGIC AND WATER-QUALITY DATA 33
Table 9. Water-quality-control data for sites in north-central Park County, Colorado, July 1997--June 1998

[MG/L, milligrams per liter; UG/L, micrograms per liter; , no data; <, less than]

DATE

SAMPLE 

TIME TYPE

MAGNECALCIUM SIUM, SODIUM, 

DIS- DIS- DISSOLVED SOLVED SOLVED 

(MG/L (MG/L (MG/L

ANC

POTAS- UNFLTRD CHLO- FLITOSIUM, TIT 4.5 SULFATE RIDE, RIEE, 

DIS- LAB DIS- DIS- DISSOLVED (MG/L 

(MG/L AS

SOLVED SOLVED SOLVED 

(MG/L (MG/L (MG/L

AS CA) AS MG) AS NA) AS K) CACO3) AS SO4) AS CL) AS F)

SW1 - TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

JUL 1997

25... 0800 BLANK 

MAY 1998

13. .. 0930 BLANK

<.02 <.01 

<.02 <.004

1.7 

1.7

SW5 - PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

SEP 1997

MAY 1998 

05... 0845 BLANK

JUN 1998 

16. ..

1400 BLANK <.02 <.01 <.2 <.l 1.9 <.1 <. 

GW30 - 391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W)

<.02 <.004 <.l <.l 2.2 <.l . 

GW32d - 391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W) 

1615 BLANK .03 .004 <.l <.l 1.4 <.l <.

SW1 - TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

JUL 1997

25. ..

25. ..

MAY 1998

13. ..

13. ..

SW5 -

SEP 1997

17. ..

17. ..

0850

0851

1000

1010

REPLICATE

REPLICATE

REPLICATE

REPLICATE

30

30

28

28

PARK GULCH ABOVE SLATER DITCH

1420

1430

REPLICATE

REPLICATE

75

77

4.8

4.8

5.5

5.5

NEAR

29

29

2.5

2.5

4.1

4.1

COMO, CO (LAT 39

52

52

GW27 - 391830105500801 SC00807636CAA01

MAY 1998

05. . .

05. . .

1510

1520

REPLICATE

REPLICATE

50

45

GW4 - 391337105484301

MAY 1998

28. . .

28. . .

1100

1105

REPLICATE

REPLICATE

53

52

9.6

9.1

14

14

SC00907531ADB01

5.2

5.0

21

21

1.

1.

(LAT

1.

1.

(LAT

1.

1.

7

7

8

9

16

8

8

39

1

1

39

1

0

92

92

85

85

9.5

9.6

18

18

.2

.2

.5

.5

< . 1

< . 1

< . 1

<.l

28N LONG 105 50 21W)

296

295

18 30N

151

151

13 37N

145

145

140 3

140 3

LONG 105 50 08W)

27 2

27 3

LONG 105 48 43W)

42 9

41 9

.5

.5

.9

.0

.2

.1

.6

.6

.7

.8

.3

.4

34 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 9. Water-quality-control data for sites in north-central Park County, Colorado, July 1997-June 1998 Continued

[MG/L, milligrams per liter; UG/L, micrograms per liter; --, no data; <, less than]

DATE

SW1 -

JUL 1997 

25. . . 

MAY 1998 

13. ..

SW5 -

SEP 1997 

17. . .

SILICA, 

BROMIDE DISDIS- SOLVED 

SOLVED (MG/L 

(MG/L AS 

AS BR) SI02)

TARRYALL CREEK BLW

.04

SOLIDS, NITRO- NITRORESIDUE GEN, GEN, 

AT 180 NITRITE N02+N03 

DEC. C DIS- DISDIS- SOLVED SOLVED 

SOLVED (MG/L (MG/L 

(MG/L) AS N) AS N)

NITRO- NITRO- NITROGEN, GEN, AM- GEN,AMAMMONIA MONIA + MONIA + PHOSDIS- ORGANIC ORGANIC PHORUS 

SOLVED TOTAL DIS. TOTAL 

(MG/L (MG/L (MG/L (MG/L 

AS N) AS N) AS N) AS P)

PARK GULCH NR COMO, CO (LAT 39 16

6

PARK GULCH ABOVE SLATER DITCH

- «. <i

GW30 - 391716105494401

MAY 1998 

05. .. <.d <. <ao

GW32d - 391452105483504

JUN 1998 

16. . .

SW1 -

JUL 1997 

25. . . 

25. .. 

MAY 1998 

13. .. 

13. ..

SW5 -

SEP 1997 

17. . . 

17. . .

..01 ..10

TARRYALL CREEK BLW

8.5 

8.6

7.5 

7.4

<!.

<.01 <.05 

<.01 <.05

.03 

<.02

NEAR COMO, CO (LAT 39 16

<.01 <.05

SC00907612AAC01

<.01 <.05

SC00907519DDA4

<.01 <.05

.02

(LAT 39

.03

54N LONG 105 47 11W)

<.l <.l <.01

28N LONG 105 50 21W)

<.2 <.2 .01

17 16N LONG 105 49 44W)

- <.,

PHOSPHORUS 

DISSOLVED 

(MG/L 

AS P)

< <" 

<. M

<.o,

(LAT 39 14 52N LONG 105 48 35W)

.04

PARK GULCH NR COMO, CO (LAT 39 16

120 

121

123 

120

PARK GULCH ABOVE SLATER DITCH

15 

15

503 

507

GW27 - 391830105500801

MAY 1998 

05. .. 

05. . .

.05 13 

.05 12

210 

209

GW4 - 391337105484301

MAY 1998 

28. . . 

28. . .

.20 16 

.21 16

243 

246

<.01 <.05 

<.01 <.05

<.01 <.05 

<.01 <.05

.03 

.03

NEAR COMO, CO (LAT 39 16

<.01 <.05 

<.01 <.05

SC00807636CAA01

.02 .10 

.02 .11

SC00907531ADB01

.01 <.05 

.01 <.05

.04 

.03

(LAT 39

.04 

.03

(LAT 39

<.02 

.06

- <a

54N LONG 105 47 11W)

<.2 <.2 .01 

.2 <.l .03

28N LONG 105 50 21W)

.5 .3 .06 

.5 .3 .04

18 30N LONG 105 50 08W)

<.l 

<.l

13 37N LONG 105 48 43W)

.2 

.1

<.«u

::?|

.04 

.01

1:11

'.01

HYDROLOGIC AND WATER-QUALITY DATA 35
Table 9. Water-quality-control data for sites in north-central Park County, Colorado, July 1997-June 1998 Continued

[MG/L, milligrams per liter; UG/L, micrograms per liter; --, no data; <, less than]

DATE

PHOSPHORUS ALUMORTHO, INUM, 

DIS- DISSOLVED 

(MG/L 

AS P)

ANT I- BERYL- CHROMONY, ARSENIC BARIUM, LIUM, CADMIUM MIUM, COBALT, COP7ER,

DIS- DIS- DIS- DIS- DIS- DIS- DISSOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED

(UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L

DISSOLVED 

(UG/L

AS AL) AS SB) AS AS) AS BA) AS BE) AS CD) AS CR) AS CO) AS CU)

SW1 - TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

JUL 1997 

25. . . 

MAY 1998 

13. ..

SW5 -

SEP 1997

17. ..

MAY 1998 

05. . .

JUN 1998 

16. . .

SW1 -

JUL 1997 

25. . . 

25. . . 

MAY 1998 

13. .. 

13. ..

SW5 -

SEP 1997

17. .. 

17. ..

MAY 1998 

05. . . 

05. . .

MAY 1998 

28. . . 

28. . .

<.01 <1 <1

PARK GULCH ABOVE SLATER DITCH

.01 <1 <1

GW30 - 391716105494401

.02 4 <1

GW32d - 91452105483504

.02 7 <1

<1 <1 <1 <1 <1 <1 <1

NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

<i

SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W)

<i

SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W)

<i

TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

< . 01 3 <1 

< . 01 2 <1

< . 01 2 <1 

< . 01 2 <1

PARK GULCH ABOVE SLATER DITCH

.03 1 <1 

.01 <1 <1

GW27 - 391830105500801

.01 5 <1

GW4 - 391337105484301

.02 4 <1 

.02 4 <1

<1 75 <1 <1 2 <1 1 

<1 77 <1 <1 2 <1 1

<1 68 <1 <1 <1 <1 <1 

1 66 <1 <1 1 <1 <1

NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

<1 60 <1 <1 4 <1 <1 

1 60 <1 <1 3 <1 <1

SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W)

<1 4 <1 <1 3 <1 <1 

<1 4 <1 <1 3 <1 <1

SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W)

<1 78 <1 <1 2 <1 <1 

<1 78 <1 <1 2 <1 <1

36 Hydrologic and Water-Quality Data for Surface Water, Ground Water, and Springs in North-Central Park County, Colorado, 

April 1997-November 1998
Table 9. Water-quality-control data for sites in north-central Park County, Colorado, July 1997-June 1998 Continued

[MG/L, milligrams per liter; UG/L, micrograms per liter; --, no data; <, less than]

DATE

IRON,

DISSOLVED

(UG/L

AS FE)

LEAD,

DISSOLVED

(UG/L

AS PB)

MANGANESE,

DISSOLVED

(UG/L

AS MN)

MOLYBDENUM,

DISSOLVED

(UG/L

AS MO)

NICKEL,

DISSOLVED

(UG/L

AS NI)

SELENIUM,

DISSOLVED

(UG/L

AS SE)

SILVER,

DISSOLVED

(UG/L

AS AG)

ZINC,

DISSOLVED

(UG/L

AS ZN)

URANIUM

NATURAL

DISSOLVED

(UG/L

AS U)

SW1 - TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

JUL 

25 

MAY

13

SW5 -

SEP 

17

MAY 

05

JUN 

16

SW1

JUL 

25 

25 

MAY 

13 

13

SW5 -

SEP 

17 

17

MAY 

05 

05

MAY 

28 

28

1997 

<3

1998 <1 <1 <1 <1 <1 <1 <1 <1

PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

1997 

<3

GW30 -

1998

GW32d -

1998

«1 <1

391716105494401 SC00907612AAC01 (LAT 39 17 16N LONG 105 49 44W)

<1 2 <1 <1 <1 <1 1 <1

391452105483504 SC00907519DDA4 (LAT 39 14 52N LONG 105 48 35W)

<1 <1 <1 <1 <1 <1 2 <1

- TARRYALL CREEK BLW PARK GULCH NR COMO, CO (LAT 39 16 54N LONG 105 47 11W)

1997 

110 

95 

1998 

97 

89

<1 9 1 <1 <1 <1 1 <1 

<1 9 1 <1 <1 <1 <1 <1

<1 10 1 <1 <1 <1 <1 <1 

<1 10 1 <1 <1 <1 <1 <1

PARK GULCH ABOVE SLATER DITCH NEAR COMO, CO (LAT 39 16 28N LONG 105 50 21W)

1997 

45 

50

GW27 -

1998

GW4 -

1998 

200 

190

<1 51 <1 <1 <1 <1 1 <1 

<1 56 <1 <1 <1 <1 <1 <1

391830105500801 SC00807636CAA01 (LAT 39 18 30N LONG 105 50 08W)

<1 8 2 <1 2 <1 <1 17 

<1 7 2 <1 2 <1 <1 18

391337105484301 SC00907531ADB01 (LAT 39 13 37N LONG 105 48 43W)

<1 146 <1 <1 <1 <1 <1 <1 

<1 146 <1 <1 <1 <1 <1 <1

HYDROLOGIC AND WATER-QUALITY DATA 37

* U.S. GOVERNMENT PRINTING OFFICE: 1999 773-084 / 20068 Region No. 8