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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

    Storm pump station design

    The outfall is 5' from the 8' deep wetwell and the volume in the pond (10yr event) is 73,000 ft^3. The discharge line from the pump to the wetlands is 6". We arrived at this by the inflow hydrograph area above a max pump rate that is below the 10 yr storm. Two 5hp pumps in parrallel at...
  3. washark

    Storm pump station design

    Berko - Do you work for Hidrostal Pump? I noticed that your other posts to this site have all been praising towards Hidrostal. What do you mean by blocking? Why would this happen?
  4. washark

    Ductile Iron Pipe Supports

    Currently we have pipe above bottom of ditch by 1'. It can be raised, but not lowered. It is a 8' deep channel/creek (more appropriate name then ditch). We need to check whether there is any normal base flow in channel, I imagine that has some bearing on this.
  5. 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...
  6. washark

    Civil Engineering Disciplines

    Your BS in Civil should go into the differences. Civil Engineering is made up of several areas that some people specialize in(like traffic, geotechnical, environmental, etc). It is a good place to start your engineering studies and from there you can go business (MBA as mentioned by gtrainor)...
  7. washark

    Software; TR-20/TR-55

    I have used several, Pondpack by Haesteds, SedCAD, ICPR (Interconnected Pond Routing) and would have to say ICPR did the best for me. Their Tech support was more accessible, and cheeper from my memory, than Haseteds. Heasteads is very proud of their softeware and service contract and it is...
  8. washark

    Vertical curves minimum alg. diff.

    Good question. I am in the lowcountry and typically have .5% grades. In ITE's Guidelines for Urban Major Street Design (Chapter 6 Grades, pages 23-26) discusses minimum slope or max K (rate of vertical curvature) for crest is 143 and the same for sag locations. And in all cases the minimum...
  9. 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...
  10. washark

    Cul-de-sac Design

    So you have seen an offset that is not completely tangent to the either the incomming or outgoing side?
  11. 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...
  12. washark

    Cul-de-sac Design

    What about offset cul-de-sac? Is there a minimum/maximum distance of offset? Can it be any anywhere between 0 and whatever half of you road width?
  13. 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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