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  • Users: drhenne
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  1. drhenne

    Simple (?) Sanitary Sewer design problem

    We want to create 3 lots for the construction of single family residences. A town sewer and manhole is adjacent to the one of the lots. The other two lots will require a sewer extension about 400 feet long. Local and State ordinances require 2 fps velocity for an 8 inch pvc pipe flowing full...
  2. drhenne

    Formula for anti-seep collar

    Does anyone know the formula (or table) for calculating the size and number of anti-seep collars required to increase seepage length by 15% or better in a detention pond ? Also, are there anti-seep collars available for 8"ADS12 pipe ?
  3. drhenne

    Design questions for sump-pump discharge

    I am working on a design for a sump pump discharge for the basement of a church located in southeast Pennsylvania. The pump discharge is 1 1/2" PVC. I need run the pipe a total of 175 feet to a curb side gutter. The existing grade is approximately 2% . The pipe will cross under a public...
  4. drhenne

    Piping for sump pump discharge

    I am working on a design for a sump pump discharge for the basement of a church located in southeast Pennsylvania. The pump discharge is 1 1/2" PVC. I need run the pipe a total of 175 feet to a curb side gutter. The existing grade is approximately 2% . The pipe will cross under a public...
  5. drhenne

    Flow rate needed for AquaNot Sump Pump

    Can anyone provide me with flow specifications or rating table for an AquaNot Safeguard Pump System Model SP4000 ? The company is now out of business and its successor has not been able to provide any information. I need these specs for sizing an infiltration basin to accomodate the outflow.
  6. drhenne

    "n" and "k" values for 6" PVC

    I am using a horizontally run section of 6" PVC culvert as the principle outlet for a retention pond. Can anyone provide me with mannings "n" and a "k" value (entrance head loss coefficient - pipe end mitered to match a 3-1 side slope; no headwall protection)? I would...
  7. drhenne

    Outlet protection for 6" pipe

    I am designing a storm water detention system which utilizes a horizontally run 6" PVC pipe as the primary outfall structure. Since the discharge is onto lawn, I need some type of difuser or splash guard at the outlet. Stone riprap is not desireable in this residential application. Can...
  8. drhenne

    Culvert Design - Computer Program

    Does anyone know of a computer program for designing culverts and printing out report with assumptions ?
  9. drhenne

    Hydrocad

    I am presently shopping for storm water management software to use on small (less than 200 acres) watersheds in Pennsylvania. Would anyone care to share any experience with

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