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Analysis of the Quality of Stormwater Runoff Discharged from Representative Connecticut Highways by USGS – Period 1 (07/01/18 – 06/30/19) [Revised Period 1 (07/01/18 – 06/30/20)] - Interim Report
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2021-09-01
[PDF-994.48 KB]
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Edition:Interim Report, July 1, 2018 – June 30, 2020
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Abstract:The overall objective of this project is to document highway runoff and constituent concentrations discharged from common highway-drainage conveyance structures in Connecticut from nine highway sites during two sequential two-year periods in order to fulfill Connecticut Department of Transportation's (CTDOT’s) Municipal Separate Storm Sewer Systems Program (MS4) Stormwater Permit outfall monitoring requirements. The study will also evaluate the potential transferability of these data to other highway sites by relating constituent concentrations to traffic volumes, impervious area, and selected land-cover characteristics. The event mean concentration data from the highway stations collected as part of this study, will be entered into a new version of the Federal Highway Runoff Database. This new data can be used to support model estimates of loads and concentrations for suspended sediment, major ions, total-recoverable metals, total nutrients, and polycyclic aromatic hydrocarbon (PAH) compounds.
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