Case Study: UMD Library Parking Lot G

University of Minnesota-Duluth
Duluth, MN


Protecting Tischer Creek from parking lot runoff


The University of Minnesota-Duluth Storm Water Pollution Prevention Program has developed a number of Alternative Runoff Management Strategies for reducing the amount, peak flows, temperature, and pollutant road of runoff from campus.

Lot G, behind the UMD Library, produces stormwater that flows to the west branch of Tischer Creek – a designated trout stream.

The lot was refurbished in 2004 to include an underground “vault” consisting of large diameter pipes to temporarily store storm parking lot runoff. This technology should reduce peak flows, reduce the temperature of runoff heated by the asphalt in summer, settle sediments that can be collected and disposed of properly, and skim oils and grease for proper disposal.

underground storage tanks
flow restrictor oil/grit separator

Source: Erik Larson, Facilities Management, UMD