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Recent content by sewerratt

  1. sewerratt

    Flow Estimating

    My maintenance people are asking for a way to estimate the amount of water they are using while slow flushing hydrants to clear up red water complaints. The hydrant will run at a half-barrel for several hours until the water clears. This isnt hard flushing where we'd use a pitot to estimate...
  2. sewerratt

    Exsiting water main needs a casing pipe

    We've done this before when we've had to extend existing casings when roadways are widened. We split the encasement. Weld alignment 'ears' on the new edges. Dont use spiral weld casing, it will warp and make it difficult to get it back in shape. Uncover only 8-10' of pipe at a time. Install...
  3. sewerratt

    Dynamic Mixer

    I'm looking for a mixer that can be inserted into an existing raw water line thru a tap. I dont necessarily need to do it live, as I can power down the wells and bleed pressure, but I dont want to cut out a section of the 30" iron main. I've looked at Hayward-gordon and napier-reid, but they...
  4. sewerratt

    Demolition of Below Grade Water Clearwells

    Does anyone have experience with demolition of below grade concrete water storage tanks? We are abandoning a plant with old clearwells and we want to make some greenspace. There are two lines of thought: #1. Remove the roof piece by piece, haul off, cut the walls down to 3ft below grade, haul...
  5. sewerratt

    Nelson Studs, Antenna Mounts and Interior Coatings

    I have an elevated storage tank that will have an antenna mast installed on it. The engineer has designed nelson studs, 3/8"dia, for the attachment. the roof is 1/4" plate. How much heat rise locally is expected and does anyone know or have experience on how that can affect an interior...
  6. sewerratt

    Nelson Stud Welding and Interior Coating

    I have an elevated storage tank that will have an antenna mast installed on it. The engineer has designed nelson studs, 3/8"dia, for the attachment. the roof is 1/4" plate. Does anyone know or have experience on how that can affect an interior paint/coating? thanks
  7. sewerratt

    Antennas, Elevated Water Tanks, and Stud Welding

    Anyone have any experience with the use of nelson stud welding to attach antenna mounts to elevated water storage tanks? The structural part is OK, but I'm trying to determine the extent of damage, if any, to expect on the interior coating of the tank. The proposed studs are 3/8" dia and the...
  8. sewerratt

    Water Well Impeller Damage

    Anyone out there hear of damage to bronze impellers in water wells due to chlorinated pre-lube water? Or leaking check valves allowing chlorinated distribution water to enter the well and corrode the impeller?
  9. sewerratt

    Pressure release for sediment jetting system

    IS this a homemade system or something available on the market? I've been looking for a system for a similar sediment problem. SOunds like what I was looking for. Any company info available on the jetting system would be appreciated. thanks
  10. sewerratt

    Odd Water Color

    Any tips on what can cause water in an internal distribution system to color a yellow green? The fixtures have been stained the color of mountaindew/mello-yello and when the pool was filled it also had the tint. These pictures are not after sitting inthe sun, it has just been filled. Water...
  11. sewerratt

    Containment for blasting and painting water tower

    2MG hydropillar style water tank will be blasted and recoated inside and out. Two containment systems have been proposed: the totally enclosed painting environment (TEPE) system with outriggers, rings and curtain, limited to deployment in winds 20mph or lower, and a scaffolding/shrink wrap...
  12. sewerratt

    Off Stream Reservoir Design & Cost

    Sorry, I jumped the gun on estimate amounts. I appreciate the dam safety direction. I'm pursuing that now. But I'm surprised at the lack of a published 'authoritative' resource for considerations on design. I want to find an authority, be it AWWA or the like (which I've checked...
  13. sewerratt

    Off Stream Reservoir Design & Cost

    We will employ a consultant for this if we proceed, but before we spend the money on that, we need to know if it is even worth that effort. My gut is no, but I need to quantify that for management. thanks for the pointers. Any old timers with a rule of thumb of $X/ac-ft for flat terrain, sandy...
  14. sewerratt

    Off Stream Reservoir Design & Cost

    I am looking for resources on estimating costs of off-stream reservoir construction. I have been tasked with doing an order-of-magnitude estimate to construct a 10000 ac-ft reservoir. Having never done anything with reservoirs (we're primarily groundwater), I need to educate myself on the issues...
  15. sewerratt

    Duckbill Check Valves -tideflex

    anyone know how much backpressure is required to invert one of the redvalve/tideflex valves? Couldnt find anything on their website.
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