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  1. NinetyWt

    bust in my scour analysis using HEC-RAS

    Could you explain a little bit about what you mean "makes no sense whatsoever"? :-) If by "two bridges" you mean a main bridge and a relief bridge, that's similar to what I do - I cut off the section and run each bridge with its respective flow. RAS is kind of funny about the parameters you...
  2. NinetyWt

    how long do you hang on

    I hear ya. I've been in business for 9 years now as a sole proprietor. I can't see going back to work for someone else, either - I think I'd go back to waiting tables first. We've also got a pond full of fish here and plenty of room for a garden. ;-) RacingAZ, I also think that is excellent...
  3. NinetyWt

    HEC-RAS Floodway Encroachment

    Are you doing a brand new study from scratch? What I mean is, often the floodway must stay the same as the previous study. If this is a FEMA mapped stream, then you probably can't increase the floodway elevations without submitting a request for Letter of Map Revision. In that case use Method 1...
  4. NinetyWt

    Modeling 2 bridges in HEC-RAS at stream confluence

    How about posting a plot of the cross-sections?
  5. NinetyWt

    FEMA issue, basement below BFE situation

    Did your friend have flood insurance before the new FIRM became effective? Read this carefully (from the document cvg linked to): If a policy is obtained before a new map becomes effective, policyholders can retain the rate associated with the previous map’s flood zone and BFE, as long as...
  6. NinetyWt

    Sump Pump Problem

    I forgot to mention the capacity issue, which is what semo noted above. The wastewater system's capacity is based on the predicted amount of graywater produced by the development. In other words, there is a certain amount of graywater which your home is expected to produce. If you add extra...
  7. NinetyWt

    Sump Pump Problem

    To expound on this, the municipality typically charges you for sanitary service. A simple way for them to do this is to charge you for the same amount of drinking water you used. You may notice this charge on your water bill. If you are adding stormwater or groundwater to their system, they...
  8. NinetyWt

    Sump Pump Problem

    Quite so, either of my suggestion could get pricey. I like Ron's suggestion of a deeper wet well with a higher 'trip' elevation. I hope you mean storm sewer as opposed to sanitary. :p
  9. NinetyWt

    Sump Pump Problem

    Two options I can think of are 1) a deep french train or 2) a deep cutoff wall. Either way, you'd need to dig a trench on the upstream side of the house. I'd dig it at least two feet below the grade beam. Offset it outside of the zone of influence from the house foundation (ten to 20 feet...
  10. NinetyWt

    NRCS TR-60 Rainfall Curve

    The reason for my many questions is that I like to look "behind" the regulations as well as at them. That is an excellent philosopy, and I imagine that it has served you well. I haven't ever worked at WES in Vicksburg, but I know a lot of folks there. I'm working over in Jackson. The only...
  11. NinetyWt

    NRCS TR-60 Rainfall Curve

    '1. Where is that, please ?' We are in Central Mississippi. '2. Do you ever investigate storms of other durations ?' Not usually - if you mean, to set the E/S or top-of-dam crest for a high hazard dam. Some smaller dams can be designed to some percentage of the PMP. '3. Are you using the...
  12. NinetyWt

    how long do you hang on

    I'm a sole proprietor and I've decided that, as long as I can pay my bills I'm going to hang in there. My backlog has shrunk to almost nothing but the work is trickling in. I have one more expense I could cut, which is my office rent in town. However, that's just me - my spouse is a City...
  13. NinetyWt

    Sewer Force Mains On Top of One Another

    Is there not any way to combine the two lines so that there is only one force main needed?
  14. NinetyWt

    NRCS TR-60 Rainfall Curve

    I'm a little late to the party RWF, but where I am, the PMP is a 24-hour storm. We are using a different distribution than the 'standard' SCS 24-hour storms. What we generally do is set the E/S and top of dam using criteria found in the TR-60 documentation. For a high hazard dam here, that...

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