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<br />Reference to these documents is suggested for design guidelines on these counter- <br />measures. The HEC-18 procedures for sizing rock riprap at bridge piers and abutments are <br />presented in this document as Design Guideline 8. For guidelines on the use of geotextiles <br />for filters for countermeasures see supplemental reference NO.2 Section 6.2 (References.) <br /> <br />A humber of highway agencies provided specifications, procedures, or design guidelines for <br />bridge scour and stream instability countermeasures that have been used successfully <br />locally, but for which only limited design guidance is available outside the agency. Several of <br />these are presented following the matrix for the consideration of and possible adaptation to <br />the needs of other highway agencies. These specifications, procedures, or guidelines have <br />not been evaluated, tested, or endorsed by the authors of this document or by the Federal <br />Highway Administration. They are presented here in the interests of information transfer on <br />countermeasures that may have application in another state or region. <br /> <br />5.2 Countermeasure Design Guidelines <br /> <br />The following specifications, procedures, or design guidelines are included following the <br />countermeasures matrix. The application of the countermeasure and the contributing <br />source(s) of information are also indicated below. <br /> <br />Design Guideline 1 <br />· Bendway Weirs I Stream Barbs <br />o Source(s): Colorado Department of Transportation <br />Washington State Department of Transportation <br />SCS <br />U.S. Army Corps of Engineers <br />- Application: Bankline protection and flow alignment in <br />meandering channel bends <br /> <br />Design Guideline 2 <br />. Soil Cement <br />- Source(s): Portland Cement Association <br />Pima County Arizona <br />Maricopa County Arizona <br />- Application: Revetment for banklines and sloping abutments <br /> <br />Design Guideline 3 <br />· Wire Enclosed Riprap Mattress (Railbank or Rock Sausage) <br />o Source(s): New Mexico State Highway and Transportation Department <br />- Application: Revetment for banklines, guide banks, and sloping abutments <br /> <br />Design Guideline 4 <br />· Articulated Concrete Block System <br />o Source(s): Hydro Review <br />ASCE Hydraulic Engineering <br />Federal Highway Administration <br />Maine Department of Transportation <br />Minnesota Department of Transportation <br />o Application 1: Bankline and abutment revetment and bed armor <br />. Application 2: Pier scour protection <br /> <br />12 <br />