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  • Users: washark
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  1. washark

    Parking lot grading and drainage (max slope and inlet spacing)

    Site: 1.8ac Proposed parking lot on hill at about 4%-5% for a run of about 200 feet. Asphalt parking with parking bays running with the slope. I can break the site into two drainage areas (1 ac and 0.5ac or thereabout) and collect at the bottom. Location is GA so rain for 10yr is around...say...
  2. washark

    Ductile Iron Pipe Supports

    What is the minimum required support for a sanitary sewer ditch crossing? We have a 15' (at bottom with sideslopes of 2:1) ditch crossing with a 8" DIP sewer main. What concerns do I need to look check...hydraulics of stream or scour, pipe supports detail, length of pipe exposed prior to...
  3. washark

    Storm pump station design

    About to design a storm-water detention pump station. Any helpful hints or suggestions about how to match pre-existing condition flow, maintenance of pump station, pump type, how to calculate emergency overflow weir, water quality for first flush or TSS traping eff.... We have a copy of the...
  4. washark

    Gravity wastewater flow meter

    I am looking for a gravity line flow meter. The project is a porta-potty company and wants to dump his trucks on-site, but the local municipality has no way of billing him. Does anyone know of a metering device that can be used for billing purposes...remember that it is raw waste with a bunch...
  5. washark

    Residential Street Sign

    My client wants to use "non-standard" regulatory and guide signage in a SFR. I know to follow the MUTCD, but I can't find an answer to...can a street name sign mount on a stop sign, or be placed over the stop sign? Also, has anyone used a "different" sign in a SFR so that...

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