Programs & Projects

197th Street Ravine—Stopping Erosion

When water washes through an eroding ravine, it sends sediment and pollutants into our lakes, rivers and wetlands. A particularly problematic eroding ravine at 197th Street in Scandia has been a key priority for Watershed District.

The ravine, which abuts 13 properties including land owned by the City of Scandia and the National Park Service, has been eroding for nearly a decade. The District hired Wenck Engineering to conduct a feasibility study for stabilizing and reconstructing it.

Two options were identified by the engineers: The first removes some of the overhead tree canopy on the south side of the ravine, installs a manhole at the end of the current culvert and directs flows into an additional 12-inch culvert down the reshaped ravine to a stilling pond. The second alternative would de-activate the existing culvert leading from the catch basin and redirect flows with a new culvert to the southeast to intersect a city platted street. Both options include a raingarden to capture and infiltrate the polluted runoff. At an estimated $37,000, option one is approximately $5,000 less expensive than option two.

The engineers presented the options (see attachment below) to the Watershed District managers in June, with a presentation for property owners in October.  While residents were supportive they expressed concern about tree loss and land disturbance and wanted to better understand the  solutions. “Fixing the ravine is a complicated task and the District is committed to doing it right,” said Watershed District Administrator Jim Shaver. Stay tuned for updates as the project moves forward.

197th St Ravine Study.ppt5.59 MB