Storm Water Detention

Underground Water Storage Tanks


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Storm Water Detention Plan

Storm Water Detention Plan
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Storm Water Detention - Enlargement of Selection in Drawing Above

Storm Water Detention - Enlargement of Selection in Drawing Above
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STORM WATER DETENTION and management is becoming a routine component in land development projects, particularly along riparian corridors where rain run off surge and silt are degrading water quality and disturbing the natural ecology.

Grading and paving disrupts the historical stormwater flow path and the natural soil absorption process. The resulting soil erosion and transportation of oils and trash into the surface drainage patterns must be remediated. The surface water speed and volume is reduced by temporarily "detaining" the rain surge water in ponds or tank systems and then releasing it more slowly over a period of hours or days to meet acceptable natural or historic run off rates.

Run off ponds detain the water but do little to remove floating trash and oil. In addition to being high maintenance, ponds are often an attractive nuisance as well as a breeding area for mosquitoes, if not properly managed.

Shallow ponds generally take up more space or real estate than an underground storage tank system. Darco manufactures underground fiberglass cisterns that can be used for storm water detention and management. Underground tank systems can be designed to intercept sand, floating trash, and oils as well as store and release the clarified water at acceptable historic rates.

Periodic maintenance is required on such systems. Sand, oil, and floating trash accumulation must be monitored and removed as necessary by a vacuum truck. Fine suspended solids may pass through an upstream baffled interceptor but generally drop out while water is held in the large quiescent storage tank system. Silt accumulating in the bottom of the tank must be occasionally removed as well.


Project Showcase

Storm Water Detention picture

Hong Cong Buffet (Kansas): Storm water detention in large parking area / 70,000 gallons

Kiowa County Court House (Kansas): Storm Surge Holding Tank / 15,000 gallons

Upland Square Shopping Center (Pennsylvania): Surge control and clarifier chamber before discharge to wetland / 6,000 gallons

UL Gordy Elementary School (Pennsylvania): Underground fiberglass tanks used for storm water management / 111,000 gallons


Darco Incorporated || 980 Darco Drive || P.O. Box 779
Bennett, CO 80102 || (800) 232-8660
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