# Presentation: 890006

## WORKSHOP ON PLAN OF ACTION FOR SCOUR CRITICAL BRIDGES

**Transportation Research Board**
**2002 Annual Meeting**
**Sponsored By**
**A2A03 Committee on Hydrology,**
**Hydraulics and Water Quality**

## HEC-23 MATRIX FOR SELECTING COUNTERMEASURES

**P.F. Lagasse, Ph.D., P.E.**
**Transportation Research Board**
**2002 Annual Meeting**
**Sponsored By**
**A2A03 Committee on Hydrology,**
**Hydraulics and Water Quality**

## Identify stream instability and scour countermeasures implemented by various SHA’s

Develop a matrix which summarizes countermeasure application throughout the US.

Provide design guidelines for selected countermeasures

**Develop a **matrix** which summarizes countermeasure application throughout the US.**
**Provide **design guidelines **for selected countermeasures**

**PURPOSE**

## THE COUNTERMEASURES MATRIX

**FUNCTIONAL APPLICATIONS**
**SUITABLE RIVER ENVIRONMENT**
**MAINTENANCE**
**INSTALLATION EXPERIENCE BY STATE**
**DESIGN GUIDELINE REFERENCES**

**THE COUNTERMEASURES MATRIX**

## THE COUNTERMEASURES MATRIX

**THE COUNTERMEASURES MATRIX**
**COUNTERMEASURE GROUPS**

** ****Group 1.A.  River Training Structures**
** ****Group 1.B.  Armoring Countermeasures**

_**GROUP 1**_**    Hydraulic Countermeasures**

## THE COUNTERMEASURES MATRIX

**COUNTERMEASURE GROUPS**

** ****Foundation Strengthening**
** ****Pier Geometry Modification**

_**GROUP 2**_**    Structural Countermeasures**

## THE COUNTERMEASURES MATRIX

**COUNTERMEASURE GROUPS**

** ****Fixed Instrumentation**
** ****Portable Instrumentation**
** ****Visual Monitoring**

_**GROUP 3**_**    Monitoring**

## THE COUNTERMEASURES MATRIX

**FUNCTIONAL APPLICATIONS**

******    ****Well Suited / Primary Use**
******     ****Possible Application / Secondary Use**
******    ****Unsuitable / Rarely Used**
**N/A  Not Applicable**

## THE COUNTERMEASURES MATRIX

**Suitable River Environment**

** ****River Type**
** ****Stream Size (Width)**
** ****Bend Radius**
** ****Flow Velocity**

** ****Bed Material**
** ****Ice / Debris Load**
** ****Bank Condition**
** ****Floodplain (Width)**

## Slide 10

## Slide 11

## HEC-23 DESIGN GUIDELINES

** ****Design Guideline 1 - Bendway Weirs/ Stream Barbs**
** ****Design Guideline 2 - Soil Cement **
** ****Design Guideline 3 - Wire Enclosed Riprap Mattress**
** ****Design Guideline 4 - Articulated Concrete Blocks**
** ****Design Guideline 5 - Grout Filled Mattresses **
** ****Design Guideline 6 - Concrete Armor Units **

## HEC-23 DESIGN GUIDELINES

** ****Design Guideline 7 - Grout/Cement Filled Bags**
** ****Design Guideline 8 - Rock Riprap at Abutments & Piers**
** ****Design Guideline 9 - Spurs **
** ****Design Guideline 10 - Guide Banks **
** ****Design Guideline 11 - Check Dams/ Drop Structures**
** ****Design Guideline 12 - Revetments **

## Sources
Colorado Department of Transportation
Washington State Department of Transportation
NRCS
U.S. Army Corps of Engineers

Application
Bankline protection and flow alignment in meandering channel bends

**Colorado Department of Transportation**
**Washington State Department of Transportation**
**NRCS**
**U.S. Army Corps of Engineers**
**Application**
**Bankline protection and flow alignment in meandering channel bends**

**DESIGN GUIDELINE 1**
**Bendway weirs / Stream barbs**

## Slide 15

## Slide 16

## Sources
Portland Cement Association
Pima County Department of Transportation
Maricopa County, Arizona

Application
Revetment for banklines and sloping abutments, drop structures and bed armor

**Portland Cement Association**
**Pima County Department of Transportation**
**Maricopa County, Arizona**
**Application**
**Revetment for banklines and sloping abutments, drop structures and bed armor**

**DESIGN GUIDELINE 2**
**Soil Cement**

## Slide 18

## Sources
New Mexico State Highway and Transportation Department

Application
Revetment for banklines, guidebanks, and sloping abutments

**Wire Enclosed Riprap Mattress**

**Sources**
**New Mexico State Highway and Transportation Department**
**Application**
**Revetment for banklines, guidebanks, and sloping abutments**

## Slide 20

## Sources
Hydro Review and Hydraulic Engineering ‘93
Maine Department of Transportation
Minnesota Department of Transportation
Application 1
Bankline and abutment revetment and bed armor
Application 2
Pier scour protection

**Articulated Concrete Block System**

**Sources**
**Hydro Review and Hydraulic Engineering ‘93**
**Maine Department of Transportation**
**Minnesota Department of Transportation**
**Application 1**
**Bankline and abutment revetment and bed armor**
**Application 2**
**Pier scour protection**

## Slide 22

## Sources
Oregon Department of Transportation
Arizona Department of Transportation

Application
Bankline and abutment revetment and bed armor

**Oregon Department of Transportation**
**Arizona Department of Transportation**
**Application**
**Bankline and abutment revetment and bed armor**

**DESIGN GUIDELINE 5**
**Articulating Grout Filled Mattress**

## Slide 24

## Sources
Pennsylvania Department of Transportation and Tested at Colorado State University
A-Jacks Testing Manual (CSU)
   and Design Manual (Ayres Associates)

Application
Pier scour and abutment scour protection

**Concrete Armor Units**

**Sources**
**Pennsylvania Department of Transportation and Tested at Colorado State University**
**A-Jacks Testing Manual (CSU)**
**   ****and Design Manual (Ayres Associates)**
**Application**
**Pier scour and abutment scour protection**

## Slide 26

## Slide 27

## Slide 28

## Slide 29

## Sources
Maryland State Highway Administration
Maine Department of Transportation

Application
Protection of undermined areas at piers and abutments and bed armor

**Grout / Cement Filled Bags**

**Sources**
**Maryland State Highway Administration**
**Maine Department of Transportation**
**Application**
**Protection of undermined areas at piers and abutments and bed armor**

## Slide 31