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  • TMDL Program Management Support Services – MS4 Stormwater Management BMP Retrofits
  • TMDL Program Management Support Services – MS4 Stormwater Management BMP Retrofits
  • TMDL Program Management Support Services – MS4 Stormwater Management BMP Retrofits

TMDL Program Management Support Services – MS4 Stormwater Management BMP Retrofits

Straughan Environmental is providing project management services and TMDL program management support to the SHA Office of Environmental Design of the Maryland State Highway Administration (SHA). SHA is required to bring Maryland highways into compliance with Maryland’s Watershed Implementation Plan for Chesapeake Bay TMDL, NPDES Phase I and II MS4 permits, and local TMDLs by implementing stormwater and environmental best management practices. As an accepted TMDL implementation strategy, SHA is addressing opportunities to retrofit existing structural Stormwater Management facilities to provide water quality management for untreated impervious areas and enhance the pollutant removal efficiencies to the maximum extent possible.

Straughan is the overall implementation manager for the TMDL/MS4 Retrofits strategy which coordinates the selection, design, and construction of projects (including design-build) related to retrofitting hundreds of existing SHA SWM facilities within the Phase 1 and 2 NPDES jurisdictions. Retrofit projects involve numerous design constraints (right-of-way, utilities, soils, environmental resources, etc.) and permitting requirements (sediment and SWM plan review, MD Dam Safety, wetlands and waterways, trees, etc.) that require expert management capabilities. Our water resources engineering team responsibilities include close coordination with other TMDL implementation strategies such as: stream restoration, outfall stabilizations, tree plantings, impervious removal, and new SWM locations. Our technical expertise in stormwater management ensures meaningful and timely reviews of complex design submissions. Our engineers utilize the powerful capabilities of GIS to select, manage, and track the progress of the retrofit strategy so the aggressive TMDL implementation milestone goals can be achieved for SHA.