Saefern II

Saefern II

Annapolis, Maryland

This design/build project, completed in 2013,  is a continuation of Saefern I and was requested by the Chesapeake Rivers Association, Inc. (The Severn Riverkeeper Program).  Pre-project monitoring efforts within this watershed have been conducted by the Severn Riverkeeper Program and have found seasonal anoxic conditions which result  from low dissolved oxygen levels caused by nutrient and sediment runoff. A stormwater outfall from a nearby cul-de-sac  previously contributed uncontrolled surface runoff  to an unstable hill slope and through the community parking lot, before reaching the RSC installation at Saefern I.  A Regenerative Stream Channel (RSC) system was built starting at the stormwater outlet down to the community parking lot. This system will minimize erosive forces and nutrient discharge by controlling and filtering stormwater runoff through a series of cobble weirs and sand berms. Nearly 287 linear feet of stream channel was restored, resulting in 625 cubic feet of water storage and 922 square feet of wetlands. This project and the monitoring data behind it has prompted the University of Maryland Center for Environmental Science (UMCES) Chesapeake Biological Laboratory to choose this watershed and the adjacent watershed of Saltworks Creek to study the effects of stream restoration on stream hydrology, biogeochemistry and aquatic ecology as part of a three-year project funded by NOAA.