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Recent content by PBW2

  1. PBW2

    Civil Engineering Software Advice/Recommendations

    We are still running AutoCad 2007 and Land Desktop 2007 and both are working great. We still have Windows XP on our machines. It's the old "if it ain't broke then don't fix it" adage. We are getting ready to purchase new computers and printers and are thinking about going with newer versions...
  2. PBW2

    Installing a Force Main inside a larger pipe/sleeve

    Is this for a grinder pump? Our regulations require 4" min diameter FM from a pump station. If for a grinder pump station, check with your regulatory agency and see if a continuous HDPE line would be acceptable; basically construct the FM to watermain standards. Definitely check with the...
  3. PBW2

    Pump Station Sizing

    This is a continuation of an earlier thread but with a little more information. Basically, we've got a situation with the design of a new pump station that will serve a new development with gravity sewer and that will also be handling discharge from other pump stations. These other existing...
  4. PBW2

    Saltwater Impoundment Design

    Rudimentary calculations: I’ve calculated the total volume to be exchanged through the tide 242,000 cfs, which basically accounts for 4’ of tide. I’ve determined the stage/storage data for the pond and the stage/discharge data for the culvert. For the culvert stage/discharge data, I assumed a...
  5. PBW2

    Saltwater Impoundment Design

    cvg, Thanks. As I've gotten deeper I don't believe that (1) 36" pipe will work. I don't think the the pond level and creek level will ever equalize. The tides vary from 0' to 7' over 6 hours and it is a pretty good size pond; 1.7 acres. The volume of water that we'd like to exchange is...
  6. PBW2

    Saltwater Impoundment Design

    Thank you all for your responses. psmart - The elevation difference between the WSE creek and WSE pond is what I am trying to calculate. This should be a function of the resistance in the pipe. I also need to make sure that the pond will drain down to the invert of the 36" pipe. We are...
  7. PBW2

    Saltwater Impoundment Design

    It will be mature crabs and there will be a screen in front of the inlet/oulet that will keep the crabs in. The inlet/outlet will consist of 36" pipe open to the tidal creek and with a concrete inlet structure in the pond. The invert of the pipe will be 4' below Mean High Water and 2' above...
  8. PBW2

    Saltwater Impoundment Design

    Our firm has been asked to design a saltwater impoundment (pond) along an existing saltwater creek that will be used to hold crabs/shrimp. The pond will be approximatley 1.7 acres and 11 ft. deep. The pond will fill and drain through a single culvert connected to the creek. We'd like to...
  9. PBW2

    Design of a sewer sump station w/ additional flows from upstream pump stations

    bimr/77JQX - thanks for your replies. A little more info and a sketch...the pump station (PS1) is an existing pump station that we are looking at replacing/upgrading the pumps within the wetwell. The existing ADF into the wetwell for PS1 from the gravity sewer has been determined to be 24...
  10. PBW2

    Design of a sewer sump station w/ additional flows from upstream pump stations

    Wouldn't the max flow from the gravity pipe flowing full will attenuate the flow? With a 100 gpm pump discharging into a manhole with an 8" gravity sewer pipe @ 0.33% slope, max flow out would be approximately 40 gpm. There would be some surcharging at the first manhole.
  11. PBW2

    Design of a sewer sump station w/ additional flows from upstream pump stations

    No the 3000 lf of gravity sewer is a sewer system within a neighborhood. There are manholes every 300 to 400 ft.
  12. PBW2

    Design of a sewer sump station w/ additional flows from upstream pump stations

    How do you handle design of a pump station that has gravity flow plus pumped discharge from upstream pump stations? We have (2) pump stations that pump into the gravity sewer system (an 8" pvc sewer @ 0.33% slope). The (2) existing upstream pump stations are 100 gpm each. A conservative...
  13. PBW2

    AutoCad trouble...hungapp question?

    Didn't see that forum....posted there also. Thanks
  14. PBW2

    AutoCad trouble...hungapp question?

    We are having issues with CAD when trying to open drawings from the open icon or trying to "saveas". If we set filedia to 0 we can open from explorer. The error we are getting is: szAppName : acad.exe szAppVer : 23.0.116.0 szModName : hungapp szModVer : 0.0.0.0 offset : 00000000 This is...
  15. PBW2

    AutoCad trouble...hungapp question?

    We are having issues with CAD when trying to open drawings from the open icon or trying to "saveas". If we set filedia to 0 we can open from explorer. The error we are getting is: szAppName : acad.exe szAppVer : 23.0.116.0 szModName : hungapp szModVer : 0.0.0.0 offset ...
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