A key component of sustainable stormwater management is ensuring that the practices we are claiming for pollutant reduction credit in the Bay actually exist, are working as intended, and are maintained properly over their design life.

Visual inspections are rapid investigations that use simple indicators to determine whether a practice is still functioning as intended and can be piggy-backed as part of routine stormwater BMP inspections required under local MS4 permits.

For more information on visual indicators and to review other CSN inspection and maintenance resources, see below:

Pond Protocols
Pond Protocols
Bioretention Illustrated
Bioretention Illustrated: A Visual Guide for Constructing, Inspecting, Maintaining and Verifying the Bioretention Practice
Chesapeake Bay BMP Verification Framework
Strengthening Verification of Best Management Practices Implemented in the Chesapeake Bay Watershed: A Basinwide Framework

Listen to our archived webcasts on urban BMP inspection, maintenance and verification here:

[Webcast] TRUST BUT VERIFY: Urban BMP Verification in the Chesapeake Bay

[Webcast] Inspecting, Maintaining and Verifying LID Practices

[Webcast] Bioretention Maintenance: In the Trenches

[Webcast] Visual Indicators for Infiltration, Surface Sand Filters and Permeable Pavement

[Webcast] Visual Indicators Part II: Filter Strips and Grass Channels

[Webcast] The Pond Protocol