6/12/2003 1

AASHTO

Report from

Task Force onHydrology and Hydraulics

Subcommittee on DesignBoston, Massachusetts

June 12, 2003

2 6/12/2003

Highway Drainage GuidelinesModel Drainage Manual

• 2003 HDG and MDM are forwarded to SOD – HDG new Chapter 15 balloted in 2002.

• Roy Jorgensen Associates, Inc., assisted Task Force.• Technical update by the Task Force members.• Very high quality professional documents.

– HDG: 15 chapters. Dual Units.

– MDM: 21 chapters. SI and US Customary editions.

– H&H Glossary included with both HDG and MDM.

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On-going Research Projects

24-7(2) Countermeasures

24-14 Scour at Contracted Bridge Sites

24-15 Bridge Scour in Cohesive Materials

24-16 Channel Migration

25-12 Wet Detention Pond Research

21-07 Development of Portable Scour Measuring Equipment

24-18 Countermeasures to Protect Bridge Abutments

24-19 Environmentally Sensitive Channel and Bank Protection

24-20 Prediction of Scour at Bridge Abutments

6/12/2003 4

On-going Research Projects Continued

24-07(146) Development of Software Verification Protocol for H&H Models

15-24 Hydraulic Loss Coefficients for Culverts

24-23 Riprap Design Criteria, Specifications, and Quality Control

24-24 Criteria for Selecting Hydraulic Models

24-25 Risk-based Guidelines for Determining the Need for Investigation of Unknown Bridge Foundations

24-26 Effects of Debris on Pier Scour at Bridges

24-8 Scour at Bridge Foundations Research Needs. Projects funded

FY98: 3 projects 24-14, 24-15, 24-16

FY01: 3 projects

6/12/2003 5

2005 Problem Statements to be Submitted by H&H Task Force

• Time Rate of Scour at Wide and Skewed Bridges

• Coordinated Update of Rainfall Maps in United States (NOAA/NWS moving too slowly. Funding as NCHRP project will help)

• Effects of Fractured or Degradable Rock on Pier Scour at Bridges

• Procedure for Determination of Joint Probability of Design Peak Flows at Stream Confluences

• Development of Bench Test Method for Determining Manning’s n-value for Culverts

• Effects of Riprap on Fish Habitat

• Evaluation of Long-Term Performance of Stormwater BMPs.

6/12/2003 6

Problem Statements Drafted

Scour at Bridge Foundations-- Research Needs

Development of a Specification to Mitigate Hydroplaning Effects

Develop Hydraulically Efficient Bridge Rail

Development of a Prediction Model for Ice Jam Formation

In-Situ Scour Measuring Device

Integration of Water Quality and Drainage Structure Design

Coastal and Tidal Waterway Stability and Scour

Turbidity and Wash Load Effect on Scour Depth

6/12/2003 7

2008 HDG and MDM

• Technical updates– Capture changes in HDSs, HECs, and software

– Preliminary list of enhancements is available

– HDG new topics: MS4 guidelines, workflow, groundwater, hydroplaning.

– HDG and MDM: Chairs are working on lists of enhancements.

• Improve usability– Easier to use

– Increase sales

6/12/2003 8

Task Force Membership

Region 1 Region 2 Region 3 Region 4Maryland * Arkansas Illinois AlaskaPennsylvania ** Florida Indiana CaliforniaVacant North Carolina Kansas Hawaii

South Carolina Minnesota IdahoVirginia Oklahoma

South DakotaTexas

* Chair Utah** Vice Chair Wyoming

OtherOntario, QuebecFHWA, AASHTO Liaison

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Task Force Participation

Year Spring Fall | Year Spring Fall1990 17 17 | 1997 20 161991 14 16 | 1998 16 171992 15 16 | 1999 17 171993 16 13 | 2000 18 181994 19 18 | 2001 18 171995 18 18 | 2002 17 191996 17 14 | 2003 17

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Special Recognition

Phil Thompson

FHWA Secretary to Task Force 1989 - 2003

Retiring June 2003

Phil has provided 14 years of dedicated and distinguished service to the Task Force.

The FHWA will appoint a new secretary soon.