Valley Glen New Construction That Leads Runoff Away
New Construction in Valley Glen with driveway water stopped short of the garage, paving pitched off the walls and part of the stormwater kept on the lot.
If the driveway of a new Valley Glen house falls toward the garage, its runoff must be caught short of the door. The garage floor sits a step above the drive, a grated trench drain crosses the opening, and the pipe from it runs to the street or to an infiltration device on the lot. Each entry door gets the same care, with a raised threshold and paving sloped away.
Paving and planting beside the walls
Every hard surface next to the house tilts away from it, and the tilt is set on the grading plan, then checked with a level as forms go in. A planter built against a wall gets a liner and its own drain, so irrigation never soaks the framing or the slab edge. Roof water leaves each downspout through solid pipe to an approved outlet, and no outlet discharges onto paving that runs back toward the house. Small as they are, these falls carry most of the water on a flat lot.
Holding stormwater on the lot
Under the City of Los Angeles low impact development rules, a new house keeps part of its stormwater on the parcel. The answer may be a drywell, an infiltration trench, a rain garden or a planter box, chosen after a percolation test shows how fast the soil drains. Each device keeps a set distance from foundations and lot lines, and the city reviews it along with the drainage plan. Since Valley Glen lies inside the city limits, these rules shape the site plan from the start.
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New Construction in Valley Glen: questions
Run a percolation test along with the borings, since its result sizes any infiltration device. The property survey should carry spot heights at the curb and gutter as well as across the yard, because a drain line leaving the lot must fall toward the street. Test borings and a soils report complete the list.
Each pour ends with trucks rinsing their chutes, and that rinse water cannot reach a storm drain. A lined washout on the lot handles it when there is space where the trucks stand. Without that space, a portable washout bin is rented or the trucks rinse at the plant, and the street inlet stays covered for the whole job. The washout method is chosen at the first site visit.
Yes. The house prices from the architectural and structural sheets, and the paving and drains need one more: a civil or landscape sheet showing slopes, trench drains, area drains and the infiltration device. When that sheet is not drawn yet, we price drainage from the grading plan's spot heights, with pipe sizes and drain counts listed so the civil engineer can match them.
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