Best BMP Retrofit in the Bay

This category recognizes the best stormwater projects constructed in the last five years to improve runoff quality from areas that were developed in the past without effective stormwater treatment. The retrofit can involve either modifications to an existing stormwater BMP or construction of new BMP.

Best projects in the category:

  1. Sharply reduce pollutants and flooding from the existing developed area (pollutant reduction estimates using the retrofit curves are suggested)
  2. Incorporate new or innovative engineering approaches to maximize pollutant removal (e.g., floating wetlands, smart BMPs, media enhancements, etc.)
  3. Solve difficult design challenges or site constraints that might be transferable to retrofit projects in other communities
  4. Be reasonably cost-effective in treating runoff generated from its impervious acreage (some general cost documentation is requested)
  5. Enhance local habitat, create attractive green space or serve as a neighborhood or community amenity.

First Place

Carter Barron Stormwater Retrofit

Carter Barron Bioretention during a rain event.

Project Team:

District Department of Energy and Environment

National Park Service – Rock Creek Park


Triangle Construction


The Carter Barron project fully retrofitted an 11‐acre impervious area with green infrastructure to restore natural hydrology, prevent erosion, reduce stormwater pollution, and protect and restore existing natural habitat. Throughout the design process, several new and innovative techniques were used, including: turf shelves, subsoiling, turret pre-treatment chambers, sand seepage berms, log jams, and brush mattress weirs. These techniques put habitat at the forefront of the design, while providing excellent treatment, helping this project stand out to the jurors.

To read the full project narrative and see more photos, visit the project folder on our Google Drive.

Second Place

St. Luke’s Church Restoration of Nature

Tidal marsh habitat and dynamic living shoreline.

Project Team:

The St. Luke’s Church Eastport
Betsy Love – Anne Arundel County Watershed Steward
Underwood and Associates Inc.
The Alliance for the Chesapeake Bay
The Chesapeake and Atlantic Coastal Bays Trust Fund

The St. Luke’s Restoration of Nature Project began with a new church member who spotted a degraded stormwater outfall and is now a comprehensive stormwater retrofit. The treatment train approach includes a daylighted stream system, regenerative stormwater conveyance, non-tidal wetland restoration and enhancement,  bioswales, living shoreline, tidal marsh habitat, and riparian forest enhancement. The project also includes an educational trail system that makes the site easy to access.

To read the full project narrative and see more photos, visit the project folder in our Google Drive!

Third Place

MedStar Harbor Hospital Clean Water Community Healing Project

Parking Lot Microbioretention

Project Team:

CityScape Engineering

Rain Underground

Stormwater Maintenance and Consulting

SBC Landscaping

Blue Water Baltimore

Plisko Sustainable Solutions, LLC,

Neighborhood Design Center

MedStar Harbor Hospital

Maryland Department of Natural Resources

Chesapeake Bay Trust

The Clean Water Community Healing Project retrofitted the hospital’s four major parking lots with two raingardens, nine micro-bioretention areas, three bioretention areas, 16,724 sf of conservation landscaping (a healing garden), and 81 new trees. The project maximizes impervious cover treatment and increases the knowledge, attitudes, and behaviors of the MHH community as it connects stormwater management to patient, staff, and community health.

To read the full project narrative and view more photos, visit the project folder on our Google Drive.