Screening and straining devices - system design information
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Device Drainage area Entrance velocity Dimensions Materials Layout Recommendations (physical location, off-line placement) Soils
Rain Guardian - Bunker Up to 6.11 cfs [1] Standard exterior dimensions = 51.25 in L x 20 in W x 15.75 in H, Designed for garden standard ponding depth of 9 in or 12 in [2] 95% recycled plastic lumber [3] Residential bioretention (rain gardens) [4]
Rain Guardian - Turret Up to 3.45 cfs [5] 46 in by 50 in base, 19.5 in total height, designed for garden standard ponding depth of 12 in [6] Reinforced concrete base, fiberglass grate [7] Parking lot rain gardens and high traffic areas [8]
Rain Guardian - Foxhole 2 ft 11 in W x 1 ft 7 in H x As Long as Needed in 3 ft increments [9] Reinforced concrete base, fiberglass grate [10] Under walkways, paths and roads into a rain garden [11]
Riprap check dams <10 acres [12] 4-5 ft wide at the bottom, 1.5 to 2 ft wide at the top, 1.5 to 2 ft high, side slopes no steeper than 2:1 [13] Riprap, coarse aggregate facing uphill side, mixture of rock sizes, nonwoven geotextile below [14] Small open channels (not streams or rivers) with channel slopes >10% [15] Areas conducive to erosion (sandy/silty) [16]
Wattles Not available, although perhaps similar to silt fence <0.25 acre Two sizes: 9 in diameter x 25 ft long and 12 in diameter x 20 ft long, wooden stakes through wattle into soil every 3-4 ft [17] Straw, tubular UV-stabilized black synthetic netting, 18-24 in wooden stakes [18] Newly constructed or disturbed slopes [19]
Hydro Screen Depends on model/application Outfall screen can handle up to 1,000 cfs [20] Depends on model/application Stainless steel Downspouts, detention ponds, private property/roofs, curbs, parking lots, farms [21]

This page was last edited on 13 April 2020, at 17:53.

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