CASE STUDY: AIRWAY HEIGHTS, WA
STORMWATER POND LINER & WATER RESERVOIR FLOATING COVER
PROBLEM: The Spokane Airport Authority had a leaking concrete storm water pond. They need a new lining system as well as a cover system over the water that would keep birds and airborne debris out of the basin.
SOLUTION: Install a plastic liner system over the concrete basin surface. HDPE and also install a floating cover system (Reinforced Polypropylene) to keep out the airborne debris and other contaminates from getting into the Pond.
MATERIALS REQUIRED: 12 ounce Non Woven Geotextile Pad. 60 Mil HDPE liner system, and a 45 Mil Reinforced Polypropylene. 4 inch by 12 inch by 9 foot Polyethylene Foam. Two submersible pumps were installed on the cover.
CONSTRUCTION DETAILS: Prepare the concrete basin structurally to accept a liner system. Install a 12 ounce non-woven geotextile pad over the concrete to provide a puncture resistance surface. The next step is to install a 60 Mil HDPE Smooth liner and secure it in place.
Once the liner has been installed, a 45 Mil Reinforced Polypropyl- ene cover with foam floatation and a weighted ballast system was installed. The purpose of the weighted balance sys- tem is to direct the rain water to the two submersible pumps that are on the cover and remove that rain water to the airport storm drain system.
12oz. Non-Woven Geotextile 60mil HDPE
45mil RPP Polyethylene Foam Submersible pumps
AREA: 100,000 SF