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Line 79:
Line 79: − (i) Catch basins or other inlet structures should be located at all sag points in the gutter grade and immediately upgrade of median breaks, crosswalks and street intersections, + − (ii) inlet types include curb openings, side inlet catch basins, trench drains, and other pre-fabricated inlet structures, + − (iii) spillways aid in turning flow 30, 45 or 90 degrees into the practice, + − (iv) if the inlet structure itself does not provide sedimentation or filtration pre-treatment, incorporate a geotextile and stone filter inlet at curb opening or spillway locations to isolate sediment, trash and debris for ease of removal, and + − (v) provide a 50 to 100 mm drop in elevation between inlet invert and top elevation of the stone cover. + − +
→Inlets
For concentrated overland flow:
For concentrated overland flow:
* Catch basins or other inlet structures should be located at all sag points in the gutter grade and immediately upgrade of median breaks, crosswalks and street intersections,
* inlet types include curb openings, side inlet catch basins, trench drains, and other pre-fabricated inlet structures,
* spillways aid in turning flow 30, 45 or 90 degrees into the practice,
* if the inlet structure itself does not provide sedimentation or filtration pre-treatment, incorporate a geotextile and stone filter inlet at curb opening or spillway locations to isolate sediment, trash and debris for ease of removal, and
* provide a 50 to 100 mm drop in elevation between inlet invert and top elevation of the stone cover.
For concentrated underground flow, inlets may include plastic or concrete pipes from roof drains or catch basins, storm sewers, OGSs or outlet leader from an upstream BMP. Solid pipe transitions to perforated pipe within the storage reservoir 0.3 m from the sides. Trench plugs should be installed around solid pipes where they enter and exit the storage reservoir.
For concentrated underground flow, inlets may include plastic or concrete pipes from roof drains or catch basins, storm sewers, OGSs or outlet leader from an upstream BMP. Solid pipe transitions to perforated pipe within the storage reservoir 0.3 m from the sides. Trench plugs should be installed around solid pipes where they enter and exit the storage reservoir.
===Sizing===
===Sizing===