Stormwater BMP Demonstration Site: Catch-Basin Inserts

The Juneau Watershed Partnership, with assistance from the Alaska Clean Water Actions program, installed additional stormwater treatment BMPs at the U.S. Forest Service Glacier Visitor Center secondary parking area. These additional BMPs are employed to treat runoff from seasonally high traffic areas. Stormwater effluent, or treated runoff, is discharged into riparian areas adjacent to Steep Creek, an anadromous stream supporting populations of red (sockeye) and silver (coho) salmon and resident Dolly Varden and cutthroat trout.

Jessi Carrier, JWP staff, shows off recently installed catch basin inserts

We installed Catch Basin Inserts and Absorbent Pipe Socks at this study site to ascertain the benefit, if any, to effluent water quality during times of peak tourism and visitor traffic.

UltraTech, Inc. UltraDrain Guard Oil & Sediment Plus model catch basin inserts were supplied by the U.S. Forest Service Juneau Ranger District for this Demonstration BMP study. These inserts fit a wide variety of basins and are relatively inexpensive (about $80-$125 per unit). Stormwater influent (runoff flowing into basins) and effluent (treated runoff leaving outfalls) samples were collected during five rainfall events (May - June 2010) and analyzed of suspended sediment, turbidity, and total dissolved solids parameters to determine water quality improvement, if any, by the catch basin inserts and storm water treatment train.


Download the CBJ Stormwater BMP Manual (adobe .pdf) for more informaiton on Catch Basin Inserts.