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  1. JrEngCa

    SWM an storm sewer design

    cvg, that's a good point also.
  2. JrEngCa

    SWM an storm sewer design

    Francesca, your first point is exactly my point. Large pipes with a flow control device and using pipes to control flow only differ in cost of installation if storage and maintenance are not factors. The same level of service exists if designed properly although costs can be reduced. SWM was...
  3. JrEngCa

    SWM an storm sewer design

    TerryScan, I think I am finally getting somewhere! I'm glad you agree with me, but I am still troubled by this. I have reviewed sewer design calculations from our office and calculations done by others. The sewer pipes are always being sized according to flows generated by the development of...
  4. JrEngCa

    SWM an storm sewer design

    Francesca thanks for helping me further. Will providing more flow capacity in my pipes than my flow control device will allow actually provide any benefits in terms of service level? I may seem crazy but I've been asking ppl this question over and over and I'm not getting an answer. My friend...
  5. JrEngCa

    SWM an storm sewer design

    bltseattle, thanks, but I was refering to the on-site sewers upstream of my flow control device. If you respond again that would be great!
  6. JrEngCa

    SWM an storm sewer design

    Sorry for making an assumption. Francesca is my sisters name :) I am concerned with sizing pipes upstream of my flow control device. Should they be sized according to release rate of the minor system?
  7. JrEngCa

    SWM an storm sewer design

    francesca thank-you for your reply. I'm italian too :) I sometimes provide on-site storage for the 1:100 year storm based on a 1:2 year release rate. The flooding and escape route is controlled so I know where the water would go if leaves the site overland. When possible, I restrict the...
  8. JrEngCa

    SWM an storm sewer design

    cvg, thank-you for your reply. If I can only release storm water from the site at a certain rate why would it be beneficial to to provide more flow capacity in the sewers than the flow control will allow at the outlet of the site? I forgot to mention that I'm dealing with site servicing on...
  9. JrEngCa

    SWM an storm sewer design

    Thank-you for your reply. My question is really about sizing storm sewers when SWM is in place. If I am releasing at a rate of a 1:2 year pre-developed flow, would it be wrong to size storm pipes based on 1:2 year pre-development flows?
  10. JrEngCa

    SWM an storm sewer design

    Hi everyone this is my first tread. This is a really cool forum! Here is my question: In my city we restrict the flow from a site to pre-developed conditions for a 1:2 year storm based on SWM requirements. Since the system is designed to surcharge, what kind of capacity should the storm...

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