Cooperator: Wisconsin
Department of Transportation, MG&E and WDNR
Project Chief: Judy Horwatich
Location: City of Madison
Project Number: BQY27
Period of Project: April 2005–December 2007
updated 2/20/07
Problem
The Wisconsin Department of Transportation (WisDOT) is mandated by the National
Pollutant Discharge Elimination System permits and through Federal and State
laws to improve water quality from our systems draining into the waters of the
State. Per the Cooperative Agreement between the Wisconsin Department of Natural
Resources (WDNR) and WisDOT (November 2002), Trans401 (December 2002), and NR
216 (September 2002), the Department is required to provide a stormwater management
program that reduces total auspended solid (TSS) loading. The statutes dictate
that the Department evaluate and assess best-management practices (BMPs) on
an annual basis.
Objectives
The objectives of this project are to (1) determine the effectiveness of a stormwater
filter management from a parking lot; (2) compare the measured removal efficiencies
with manufacturers’ estimates; (3) characterize the variability in freeway
runoff quality; (4) characterize pollutant loading in parking-lot runoff; and
(5) determine the practical application of the treatment devices (for example,
installation, operation and maintenance costs).
Progress (January 2006 to June 2006)
Samples were collected during 15 of the 30 storms planned to be sampled. Replicate
samples were collected. Automated dye dilution was done to calibrate flow meters.
Cameras were installed at the site to verify bypass occurrences.
Plans (July 2006 to December 2006)
Complete sampling of the 30 storms. Begin
analysis of data.
Reports
An investigative report will be prepared in FY07.
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