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  1. Twinkie

    Controlling a really muddy construction site

    Have a CPESC design an E&S Plan for you :)
  2. Twinkie

    10' C.C. Sewer

    I saw "cylindrical concrete" on an old sewer crawler website, so that makes some sense I guess, but no access pr maintenance structures that I can find anywhere.
  3. Twinkie

    Water level rise from pre to post

    Can you pop a raingarden in the front or backyard and call it a day, or use some amended soils and take credit for the higher void ratio thereby meeting the pre to post rate requirements.
  4. Twinkie

    10' C.C. Sewer

    I am looking at a utility plan from the early 1900s, and there is what is called out as "10' CC Sewer" shown on the plans. This "pipe" has an invert depth of greater than 50-feet. There are no structures visible anywhere on the plan sheets that I have. Does anyone know what this could be? This...
  5. Twinkie

    Project sewer

    This post makes my head hurt.
  6. Twinkie

    Limit of Shallow concentrated flow

    To me this appears to be an unsubstantiated attempt to make engineers over design for SWM, nothing else. Sheet flow becomes shallow concentrated, but you can't have channelized without a channel.
  7. Twinkie

    Steep stormline terminating in manhole. Energy dissipation nozzle?

    Can we look at this another way? How about putting a deep manhole or structure at the upstream end and flattening the pipe? With your concept you are trying to essentially design a level spreader, which would need to be massive for that velocity.
  8. Twinkie

    Appearing Before Board Members

    Just curious...if you're not a PE, why isnt the person signing and sealing your drawings appearing before these boards?
  9. Twinkie

    Overland Flow Requirement for subdivisions

    This will vary by municipality, but you have the gist of it. It's typically going to say for XX 24 hour storm event that overland flow must be contained within the cartway, or a minimum 1' below the first floor elevation, or something else similar.
  10. Twinkie

    Water Quality Pretreatment - Hydrodynamic Separator vs. Isolator Row (Chamber Infiltration System)

    Every propriety product is going to have it's own unique treatment efficiencies. Be sure to use a product that is certified in CA (if required). As for maintenance, all options are easy to maintain, if they are actually maintained at recommended intervals. I'd guess the isolator rows become...
  11. Twinkie

    Sewer Flow Rates

    "The rate provided likely assumes that every faucet, toilet, shower and anything else that can contribute is running. A senior engineer once told me for septic design called this the "party" factor. The plumbing engineer wants to ensure that if the building is having a party the sewer will work...
  12. Twinkie

    Most Efficient CAD Method For Grading A Site

    Call me old fashioned, but there is just no substitute to putting a scale on your plans and grading that out by hand with your calculator and pencil.
  13. Twinkie

    Expanding our firm....

    We have been trying to hire an experienced drafter for quite some time now, they just don’t exist anymore. Currently, our engineers do all of their own drafting. I’m not a fan of this, as they have no formal CAD training, and they really aren’t all that good or efficient at it. I’d rather be...
  14. Twinkie

    Constant Inflow to Pond Node

    We got into the weeds, turned on all the spot grades in the survey, and contoured this with 0.10-foot contours. There are depressions on the site, which was exactly what I needed to complete the model. The WSE generated by the model falls almost directly where we visually observed the spill.
  15. Twinkie

    Constant Inflow to Pond Node

    Do you think there is a way to route this to an area node? I just received topographic survey, and while the overall land area that receives the overflow is super flat (.002-1) on average, there is no real area that I can call defined storage as I had originally assumed.
  16. Twinkie

    Constant Inflow to Pond Node

    Thank you both. I knew this would be fairly simple, I couldn’t figure it out for some reason.
  17. Twinkie

    Constant Inflow to Pond Node

    I am trying to model the spread of water overflow from a tank that occurs over a period of time. The scenario I have is this....this tank overflowed for approximately 16 hours, at an estimated rate of 1.65 cfs. I'm trying to estimate the probable extents of this overflow on the surrounding...
  18. Twinkie

    Best Stormwater Modeling Software

    UnnamedStateDEP made us redo our SWMM model in HydroCAD because they couldn't understand SWMM.
  19. Twinkie

    Graffitti/ Murals on floodwalls

    Of all the things that keep me awake at night...this certainly isn't one of them.
  20. Twinkie

    Best Stormwater Modeling Software

    If it ain't broke....

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