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Suggested Citation:"Appendix A - DOTs Included in TMDLs." National Academies of Sciences, Engineering, and Medicine. 2019. Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff. Washington, DC: The National Academies Press. doi: 10.17226/25473.
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Page 125
Page 126
Suggested Citation:"Appendix A - DOTs Included in TMDLs." National Academies of Sciences, Engineering, and Medicine. 2019. Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff. Washington, DC: The National Academies Press. doi: 10.17226/25473.
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Page 126
Page 127
Suggested Citation:"Appendix A - DOTs Included in TMDLs." National Academies of Sciences, Engineering, and Medicine. 2019. Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff. Washington, DC: The National Academies Press. doi: 10.17226/25473.
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Page 127

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

125 A P P E N D I X A DOTs Included in TMDLs

Table 51. DOTs with WLAs or Included in Urban Stormwater Allocations (from EPA ATTAINS Tool accessed January 19, 2017). Pollutants of Concern State1 Nutrients Toxics/Metals Sediment/ Turbidity Pathogens Organic Enrichment/ Oxygen Depletion Ammonia pH/Alkalinity Temperature Salinity/ Total Dissolved Solids/ Chlorides/ Sulfates Pesticides Algal Growth PCBs Toxic Organics Impaired Biota Trash Uranium Other AK X X X X X AL X AR X X AZ X X X X CA X X X X X X X X X X X X CO X X CT X X DE X X FL X X X X X X X X GA X X HI X X X ID X X X X X X IL X X X X X X X KS X X X KY X LA X X X X X X X MA X X MD X X ME X X X MI X X X X

MN X X X X X X MO X X MS X X X X MT X X X X X X NC X X X X X X NH X X NJ X NM X X X X X X X X X NV X X NY X X OH X X X X X X X X X X OK X X X X OR X X X X X X X X X X X PA X X X X X X X RI X X X SC X X X SD X X X X TN X X X X X X X X X TX X UT X X VA X X X X X X X WA X X X X X X X X X X X X WI X X WV X X X X X X WY X X X X X Count 32 20 29 36 20 10 8 7 9 7 2 7 4 0 1 1 10 Notes: 1The query used for this analysis did not return results for five states (IN, IA, NE, ND, and VE). The Expert Query search term was "Department of Transportation."

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Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff Get This Book
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 Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff
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State DOTs are increasingly subject to Total Maximum Daily Load (TMDL) requirements for water quality improvement that are implemented through National Pollutant Discharge Elimination System (NPDES) permits.

As a result, state DOTs may incur significant costs to construct, operate, maintain, and monitor performance of best management practices and other stormwater treatment facilities that treat stormwater from sources outside the right-of-way, as well as stormwater from roadway sources.

TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 918: Approaches for Determining and Complying with TMDL Requirements Related to Roadway Stormwater Runoff describes how to evaluate TMDLs and develop a plan to comply with the requirements of a TMDL. The methods provide a robust approach to determining the pollutants of concern and how to assess the contribution of the roadway while understanding other important factors that affect overall pollutant loads, including adjacent land uses and watershed conditions and characteristics.

A set of presentation slides summarizing the project that developed the report is available for download.

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