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Recent content by cht13er

  1. cht13er

    Floodline downstream of a bridge

    May have been useful to provide the attachment.http://files.engineering.com/getfile.aspx?folder=4c81a3da-ed17-4369-a88f-4909ba5f4781&file=Floodplain_at_bridge.pdf
  2. cht13er

    Floodline downstream of a bridge

    I have a strange issue. As shown on the attached sketch, a small creek is flooding over a road (approx 2'). Above/upstream of the bridge, the creek's banks completely contain the flow - but when it hits the bridge flows are forced around the concrete walls on either side of the road. Downstream...
  3. cht13er

    HEC-RAS - left/right Stations

    Isn't it strange that there is no impact if left/right stations don't 'line up' from cross-section to cross-section? E.g. Cross section 1 is 50' downstream from Cross section 2. They're both 30' wide, but cross section 1 runs from station 0 to 30' (left/right) and for some reason cross section...
  4. cht13er

    Air release valve inside pumping station manhole?

    Good day! I've got a 50mm (2") sanitary forcemain that will have a high point anywhere between where I'm connecting and the sanitary pumping station (SPS) it's discharging into (approx. 60m or less than 200' between the two). I had a look at this fabulous catalogue that a eng-tips user posted...
  5. cht13er

    Weeping tile design

    Ron, thanks for your comments. The weeper is just to ensure the long-term performance of the foundation - the thought being that if they're sitting in a wet trench something could happen. Roof drains, as you suggest, will be directed to infiltration areas far away from the building. My...
  6. cht13er

    Weeping tile design

    Building is founded on several metres of compacted fill consisting primarily of silty sand. GWT approx 10m below the building.
  7. cht13er

    Weeping tile design

    Been asked to conceptually design a weeping tile around a large (1000x750' or 325x230m) warehouse. Any suggestions as to where I should start? Thanks in advance! Chris
  8. cht13er

    2" yard hydrant?

    Thanks! Google took me to hydrants.com (go figure) - their #77 maingaurd hydrant seems to be what I was looking for!
  9. cht13er

    2" yard hydrant?

    Cost of a yard hydrant is (hopefully) well under $1k; they're padlockable; you can easily connect a hose. Traditional hydrant would be well over $5k...
  10. cht13er

    2" yard hydrant?

    Good day, guys and gals! I've got a 2" water service provided to the site. I'm spec-ing a yard hydrant so that maintenance and/or cleaning of the sanitary pumping station (think: a large diameter, 30' deep manhole) can be pretty straightforward. Since I have the 2" service, I figure why not put...
  11. cht13er

    Cost / Duration of a Flood Study

    Why is the study area so small - are you in a city?
  12. cht13er

    oil water separator

    http://www.stormceptor.com/en/products/stormceptor-classic-systems/submerged-stormceptor.html ?
  13. cht13er

    Convert 1 minute discharge data to 1 hour data

    Clearly adding all the flows (in Litres, say) that occur between 2:00 and 2:59 will give you a flow in L/hour. Not really sure what you're looking for here.
  14. cht13er

    Concrete Pipe Spec for allowable cracking

    Where I work, 100% of storm and sanitary sewers are CCTV inspected after installation...lots of "dirty videos" as the sanitary is often in use already by the time the CCTV is done!
  15. cht13er

    Separation distance between potable water tank and sewage holding tank

    Minimum clearance between a sewage holding tank and a well is 15m according to Ontario Canada's building code (Table 8.2.1.6.C if that helps at all). Different excavations would definitely not be detrimental, as coloeng noted. Do you know depth to (seasonally high) groundwater?

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