HEC-23 Countermeasure Desigggn for Bridge Scour

1 Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. HEC-23 . Countermeasure Design g for Bridge g Scour & Stream Instability Larry A. L Arneson, , Ph D , PE WRE. FHWA Resource Center,, Lakewood,, CO. Seventeenth Statewide Conference on Local Bridges Syracuse , New York October 25 27, 2011. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Why y Are Scour countermeasures Important???? New York State 12005 NBIS Bridges(2010).

2 Number IHS Scour Critical 14. Number NHS Scour Critical 37. Number NNHS Scour Critical 763. Total 814. % Population 7%. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Stream Stability Animation Bridge Scour Animation STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Presentation Outline: HEC-23 . HEC 23 - Introduction I d i and d Overview O i New Design Guidelines for Pier Scour &.

3 Streambank Revetment New Filter Design Necessary, But Often Overlooked STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. HEC-23 , Bridge Scour and Stream Instability countermeasures - Experience, Selection, &. Design Guidance Third Edition (September 2009). Volume 1. Chapters 1-9, 1 9 References, References and Four Appendices Volume 2. Ni t Nineteen D. Design i G Guidelines id li iin Si Six S. Sections ti STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011.

4 Volume 1. Expanded guidance on development of Plans of Action (POA) for Scour critical bridges p Updated Countermeasure selection matrix Updated chapter on riprap design, filters, failure modes,, and alternatives A new chapter on biotechnical engineering p Revised chapter on Scour monitoring g and instrumentation STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Volume 2. countermeasures for Stream Instability countermeasures for Streambank and Roadway Embankment Protection countermeasures for Bridge Pier Protection countermeasures for Abutment Protection Filter Design Special Applications STRUCTURES HYDRAULICS GEOTECHNICAL.

5 Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Section 1 Stream Instability DG 1 Bendway Weirs / Stream Barbs DG 2 Spurs DG 3 Check Dams/Drop Structures *Design Design Workshop Available in NHI Course 135048. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Section 2 Streambank Protection DG 4 Riprap Revetment DG 5 Riprap Design for Embankment Overtopping DG 6 - Wire Enclosed Riprap Mattress DG 7 Soil Cement DG 8 Articulating g Concrete Block Systems y DG 9 Grout-Filled Mattresses DG 10 Gabion Mattresses *Design Workshop Available in NHI Course 135048.

6 STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Section 3 Bridge Pier Protection DG 8 ACB S. Systems at BBridge id Pi Piers DG 9 Grout-Filled Mattresses at Bridge Piers DG 10 Gabion G bi M Mattresses tt att B. Bridge id PiPiers DG 11 Rock Riprap at Bridge Piers DG 12 Partially Grouted Riprap at Bridge Piers *Design Workshop Available in NHI Course 135048. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011.

7 Section 4 Abutment Protection DG 13 Grout/Cement Filled Bags DG 14 Rock Riprap at Bridge Abutments DG 15 Guide Banks Section 5 Filter Design DG 16 Filter Design *Design Workshop Available in NHI Course 135048. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. S ti 6 Special Section S i lAApplications li ti DG 17 Riprap Design for Wave Attack DG 18 Riprap Protection for Bottomless Culverts DG 19 Concrete Armor Units * Design g Workshop p available in NHI course 135048. STRUCTURES HYDRAULICS GEOTECHNICAL.

8 Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Th countermeasures The C t Matrix M t i Group 1 Hydraulic countermeasures Group 2 Structural countermeasures Group 3 Biotechnical countermeasures Group 4 Monitoring * HEC-23 , Volume 1, Chapter 2. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. C. Countermeasure t Ch Characteristics t i ti Functional Applications Suitable River Environment Maintenance Installation/Experience by State Design Guidelines Reference STRUCTURES HYDRAULICS GEOTECHNICAL.

9 Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Q. Questions ti Th The M. Matrix t i Will A. Answer: What type yp of problem p is the Countermeasure for? What type of river environment is the Countermeasure suitable for or where will it not perform well?

10 What level of resources will need to be planned for maintenance? What states or regions of the US have experience with this Countermeasure ? Where do I obtain design guidance? STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. Design D i G Guideline id li 1212: Partially Grouted Riprap STRUCTURES HYDRAULICS GEOTECHNICAL. Hydraulic Engineering Circular No. 23. Seventeenth Statewide Conference on Local Bridge Syracuse , New York October 25 27, 2011. PARTIALLY GROUTED RIPRAP. STRUCTURES HYDRAULICS GEOTECHNICAL.