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  1. bpattengale

    Deep Interceptor Sewer Project - Construction, Inspection, etc.

    Make sure the specs include a mandrel or deflection testing for the pipe. The pressure test will tell if there are any leaks but not if the pipe is exceding allowable deflection. If those
  2. bpattengale

    Do you make as much as you deserve?

    filasofee that would be one heck of a payraise for me. Entry level EIT pay is nowhere near that. Even having 4 years experience that pay is significantly above what I make. You might make that out on the costs in a major market, but the cost of living is way higher out there. I'm happy with...
  3. bpattengale

    Recent Engineering Debacles

    Greg, Just a question, but where is the cost savings in throttle by wire? It just seems counter intuitive to me. I'd think some cabling vs a bunch of computers would be cheaper. I'm sure you're right but could you elborate? I'm sure there is something I'm overlooking, but it isn't obvious to me.
  4. bpattengale

    How to Explain Being Fired to Future Employers

    ajack, Most employment in the US is an "at will" state. Meaning the company or I can terminate my employment at any time or for any reason (Yes I am aware that there are antidiscrimination laws). At all of my jobs I've signed documents that say exactly that. Granted with all of the lawyers...
  5. bpattengale

    Eminent domain abuse

    I see your point about the double negative now. I'd agree with you on the adequate definition too, but thats always been a problem with eminate domain. I also noticed that I can be granted eminate domain powers in the state of Texas, maybe I should and try to get that new stadium of theirs just...
  6. bpattengale

    Eminent domain abuse

    IRstuff, The Texas bill states the no property can be taken for "public use" without adequate compensation. It then states that "public use" does not include the transfer of said property to a private entity for the primary purpose of increasing the tax revenue or economic development. I read...
  7. bpattengale

    Integral Valve Vault Lift Station

    No experience with the intergral valve vault but looking at the PDFs on the link you provided I noticed a couple of things. One while the opening in the upper section may be large enough to remove the pumps, most submersible pump installations I've done have the quick disconnect with the rails...
  8. bpattengale

    BUILDING CAVES IN: No one injured in overnight collapse at NDSU excava

    Thats been the topic of discusion around the office yesterday. Its hard to believe that with the excavation as close to the building and open as long as it has been that there wasn't some kind of shoring in place. Not to mention the fact the soils around here are horrible to begin with. I...
  9. bpattengale

    Geotechnical Construction Monitor Ethical Question

    Ron pretty much summed it all up in his post. Don't give in to the contractor. The plans were designed and engineered using certain assumptions and if you weren't involved with that you may not see why things are done a certain way. You do learn a lot in the field, but a lot of it is about...
  10. bpattengale

    Bigger Pipe = Less Freezing?

    The plumber is going by plumbing code with the pipe slope. If I remember correctly a 4" service line should have a minimum 1/2" per foot slope and the 6" service is a minimum slope of 1/4" per foot. Most codes specifically prohibit upsizing the pipe to simply lower the minimum slope because...
  11. bpattengale

    Ephemeral Stream as Stormwater management ?????

    That number makes more sense, that works out to be 1.5 in of rainfall. That is a pretty common treatment amount for volume based design. I'm not familiar with the exact stormwater requirements for Maryland, but some pretty common ones are no increase in the peak runoff rates for the 2, 10, and...
  12. bpattengale

    Ephemeral Stream as Stormwater management ?????

    jgd2, something is wrong with that number. The rational method with a C of 0.9 and an intesity of 7 in/hr produces a peak flow of 10.7 cfs for a 1.7 acre site. 7 in/hr is roughly a 50 yr storm with a 10 min Tc for central MN. Common stormwater regulations require treatment of the peak...
  13. bpattengale

    Interchange Crossroad Signing

    Currently working on an interstate reconstruction project and includes replacement and updating of all crossroad signing at the interchanges. The MUTCD gives the signing layout appropriate for a single travel lane crossroad on an Intermediate Class interchange. So I know what signing needs to...
  14. bpattengale

    Design storm for erosion control

    civilman72, The product I was refering to is actually a North American Green Product. It was the VMAX P550 mat. Have you tried directly calculating the shear stress? Sheer Stress = Unit wight of water x depth x slope. gbam is saying that the FHWA manual is applicable for flows LESS THAN 50...
  15. bpattengale

    Frost Penetration and Movement

    I've always been under the impression that the deeper frost penetration below roads is due to the lack of snow cover. The roads are generally kept free from any insulating snow cover which allows the frost to penetrate deeper then the adjacent ground with the insulating snow cover. In my area...
  16. bpattengale

    Design storm for erosion control

    Grouted rip-rap in a roadside ditch? That seems a little overkill. What kind of TRM are you using and what is the shear stress in your channel? The high end TRM with full vegatative cover have allowable shear stress of 14.0lbs/ft^2. Granted that is the manufacture's test data, but the...
  17. bpattengale

    Engineers and CAD

    As a young engineer (I'm 26, so just a baby by most of the people here), I've seen drafting become more a by-product of the design. At my first job out of college with a small company it was all site design work. I'd do the design and layout in AutoCAD and produce full construction plans...
  18. bpattengale

    18" Watermain dead end

    Are there any branches or services off of the 18" main on the 400'? If not just shut the closest gate valve and drain the line. During phase 2 just redisinfect the line after the line is completed. The 10 States Standards for Waterworks recommends a minimum free chlorine residual of 0.2 mg/L...
  19. bpattengale

    E' for Pipe Bedding

    moe, yes the E' are for the bedding material, but E' for the native soils of the trench are also important. The following in from the PE Pipe Handbook, yes it not steel, but its still flexible pipe. "Soil Support Factor, FS Ring deflection and the accompanying horizontal diameter expansion...
  20. bpattengale

    E' for Pipe Bedding

    fattdad would those tables apply with steel pipe? I'm referencing The Concrete Pipe Design Manual, but the E' values of the bedding don't come into play, just the bedding type. I had to check myself, but steel is designed as a flexible pipe. moe333, just for your reference the civil might...

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