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Chapter 7
Construction BMPs
Contents
1.0 Introduction ...................................................................................................................................... 1
2.0 Fundamental Erosion and Sediment Control Principles .............................................................. 2
2.1 Erosion ...................................................................................................................................................... 2
2.2 Sedimentation ............................................................................................................................................ 3
2.3 Effective Erosion and Sediment Control ................................................................................................... 3
3.0 Colorado Construction Stormwater Discharge Permits ............................................................... 4
3.1 Preparing and Implementing a Stormwater Management Plan (SWMP) .................................................. 5
3.1.1 General SWMP Recommendations ............................................................................................... 6
3.1.2 SWMP Elements ........................................................................................................................... 6
3.2 Inspections ................................................................................................................................................ 9
3.2.1 Inspection Frequency .................................................................................................................... 9
3.2.2 Inspection Records ...................................................................................................................... 10
3.3 Maintenance ............................................................................................................................................ 10
3.4 Disposition of Temporary Measures ....................................................................................................... 10
3.5 2009 Federal Effluent Limitation Guidelines .......................................................................................... 11
4.0 Overview of Construction BMPs .................................................................................................. 11
4.1 Erosion Control Measures ....................................................................................................................... 15
4.2 Sediment Control Measures .................................................................................................................... 15
4.3 Site Management ..................................................................................................................................... 16
4.4 Materials Management ............................................................................................................................ 17
4.5 Proprietary BMPs .................................................................................................................................... 17
5.0 BMP Selection and Planning ......................................................................................................... 18
5.1 Site Assessment ....................................................................................................................................... 18
5.2 Slope-Length and Runoff Considerations ............................................................................................... 20
5.3 Using the Revised Universal Soil Loss Equation .................................................................................... 21
5.4 BMP Functions ....................................................................................................................................... 22
5.5 Consistency with Other Plans ................................................................................................................. 22
5.5.1 Drainage Plans ............................................................................................................................ 22
5.5.2 Post Construction Stormwater Management ............................................................................... 22
5.5.3 Air Quality Plans ......................................................................................................................... 23
5.6 Guidelines for Integrating Site Conditions and BMPs into a SWMP...................................................... 23
6.0 Construction Dewatering ............................................................................................................... 24
7.0 Construction in Waterways ........................................................................................................... 24
8.0 Considerations for Linear Construction Projects ....................................................................... 27
8.1 General Considerations ........................................................................................................................... 27
8.2 Underground Utility Trenching Criteria .................................................................................................. 28
9.0 References ....................................................................................................................................... 29
November 2010 Urban Drainage and Flood Control District 7-i
Urban Storm Drainage Criteria Manual Volume 3