Screening and straining devices - system design information
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 | 95% recycled plastic lumber | Residential bioretention (rain gardens) | ||
| Rain Guardian - Turret | Up to 3.45 cfs | 46 in by 50 in base, 19.5 in total height, designed for garden standard ponding depth of 12 in | Reinforced concrete base, fiberglass grate | Parking lot rain gardens and high traffic areas | ||
| Rain Guardian - Foxhole | 2 ft 11 in W x 1 ft 7 in H x As Long as Needed in 3 ft increments | Reinforced concrete base, fiberglass grate | Under walkways, paths and roads into a rain garden | |||
| Riprap check dams | <10 acres | 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 | Riprap, coarse aggregate facing uphill side, mixture of rock sizes, nonwoven geotextile below | Small open channels (not streams or rivers) with channel slopes >10% | Areas conducive to erosion (sandy/silty) | |
| 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 | Straw, tubular UV-stabilized black synthetic netting, 18-24 in wooden stakes | Newly constructed or disturbed slopes | ||
| Hydro Screen | Depends on model/application | Outfall screen can handle up to 1,000 cfs | Depends on model/application | Stainless steel | Downspouts, detention ponds, private property/roofs, curbs, parking lots, farms |