The plan notes that Wilkins Run, a tributary (sic) that drains directly into Lake Erie, is situated 1,000 feet (300 m) west of the airport.
Construction and deicing operations require federal permits and extensive measures are taken to contain and process the runoff properly.
The creek's mouth opens to Lake Erie about one-half mile north of Pennsylvania Route 5 at Water Street.
The Environmental Protection Agency (EPA) has designated this watershed a Great Lakes Areas of Concern (AoC).
Significant developments in this sub-watershed include Asbury Woods Community Park and Nature Center, Baldwin Business Park, Bush Industries, Erie Golf Club, Erie Memorial Gardens, Family First Sports Park, Kahkwa Club, Lakeview Landfill, Laurel Hill Cemetery, Millcreek Mall, Orchard Ponds Golf Course, Presque Isle Downs, and Upper Peach Street.
A detailed online report[10] on the Walnut Creek watershed is available from the Pennsylvania Department of Environmental Protection (PA DEP).
[11] The inclusion of a race track at Presque Isle Downs and Casino will bring up to one thousand horses to fill ten barns on the grounds by summer 2008.
The horses are expected to produce up to ten tons of manure and hay waste per day, which will be transported and sold.
Fifteen acres of man-made wetlands have been situated in the center of the racetrack to deal with runoff issues that could impact the watershed.