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  1. LHA

    AT/FP Trainings for civilians

    I am a civil engineer employed by an A/E company. We regularly do Federal facilities work which requires design to follow UFC 04-010-01 Anti-Terrorism Force Protection standards. Please advise if there are any AT/FP Trainings open to civilians with no security clearance. Please further advise...
  2. LHA

    Spirit or LEED?

    In the past, we have used Spirit for military jobs instead of LEED. On our most recent project, we are using LEED. Two questions: 1) What/who determines Sprit or LEED on Federal work? It seems like it simply comes from the base XO or an agency reviewer. Isn't there a protocol? 2) What is...
  3. LHA

    Another HydroCAD?

    Peter: Just FYI, there is another software called HydroCAD, for fluid mechanics. I just discovered it here: http://www.hydrocad.com/ Engineering is the practice of the art of science - Steve
  4. LHA

    Grating over headwalls and endwalls

    An architect I am working for is insisting we put grating over headwalls and endwalls to keep kids out. I think these are a terrible idea. I've never seen a grated headwall in the field that is not clogged. I've never seen a grated endwall in the field that is not clogged, unless it is...
  5. LHA

    Cost for Removal of Storm Manhole/Inlet

    What would be a good general cost for Removal of Storm Manhole/Inlet? Just ballpark, for estimating. I'd like to price by Each unit, but some are very deep, so maybe I'll need a Verticle Foot unit? A source will help. I'm in PA, USA, but if you tell me where your cost is valid, I can...
  6. LHA

    Layer filter to exclude layer names

    Is there a way to write a Layer filter to exclude layer names? I know *xx* will INCLUDE all with "xx" in the name, but I want to not have to see and scroll through all the xref layers, so I want to EXCLUDE all with "xx" in the name. The only way I can think to trick it is to unlock all, lock...
  7. LHA

    Listing multiple pline area w/out picking each one, just the areas

    How do I list multiple pline areas w/out picking each one, just the areas, not the coordinates. Remember, amateurs built the ark...professionals built the Titanic. -Steve
  8. LHA

    Formula for the Equivalent Diameter of elliptical pipe

    Does anyone know the formula for the Equivalent Diameter of elliptical pipe? Not the hydraulic radius. A source would be appreciated. Thanks. Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.” -Steve
  9. LHA

    Formula for the Equivalent Diameter of elliptical pipe

    A source would be appreciated. Thanks. Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.” -Steve
  10. LHA

    Settling, without compaction

    I want to convert a sediment trap into a rain garden. I need to fill in 0.8 feet; 0.4 with sand, then 0.4' with topsoil. I don't care whether the sand and soil are mixed. It can't be mechanically compacted, but to be landscaped and allowed to settle to a final depth. How deep should each...
  11. LHA

    CADD course for a veteran user, yeah or neah?

    Those of you who have had actual CADD coursework are lucky to have had it. I've been using CADD for 9 years now, and I still debate taking a course, because I know there is so much more CADD can do than I am able to allow it to do. At my first job using CADD in '96, no one (or at least, I) did...
  12. LHA

    USGS 7.5 minute Quad maps' datum

    Are USGS 7.5 minute Quad maps based on NAD27, NAD 83 or GEO84 projection datum? Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.” -Steve
  13. LHA

    USGS 7.5 Quad maps' datum

    Are USGS 7.5 Quad maps based on NAD27, NAD 83 or GEO84 projection datum? Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.” -Steve
  14. LHA

    Infiltration over limestone

    Fellow Geniuses: I am soon going to attend a Regional Stormwater Management Manual Focus Groups in PA, USA. Our purpose is to help fine-tune the state Stormwater Management Manual to ensure that needs unique to each region is addressed. I live in southcentral PA, and limestone and dolomite...
  15. LHA

    SCS 24 hour storm with Rational Method? (tough one!)

    Fellow geniuses: A competitor's software has an option which allows hydrographs to be generated using the Rational Method, but with the intensity from SCS 24 hour storm distribution. The Return Rate, Precipitation (in inches) and SCS Rainfall Type are specified...from there, an IDF curve is...
  16. LHA

    VTPSUHM - SCS 24 hour storm with Rational Method? (tough one!)

    Fellow geniuses: VTPSUHM has an option which allows hydrographs to be generated using the Rational Method, but with the intensity from SCS 24 hour storm distribution. The Return Rate, Precipitation (in inches) and SCS Rainfall Type are specified...from there, an IDF curve is (apparently)...
  17. LHA

    What is the wall thickness of Vitrified Clay Pipe?

    Fellow geniuses: What is the wall thickness of Vitrified Clay Pipe? I specifically need this info for 12". If anyone has a web address where I can get a table of different diameters, I would greatly appreciate it. Hint: The Clay Pipe Institute doesn't have one...
  18. LHA

    Snow melt vs unfrozen precip

    Fellow geniuses: How many inches of rainfall is an inch of snowmelt equivalent to? This has to go in a water budget study, so I need a source. I am in PA, USA (avg annual temp 55F), if that matters. Thank you
  19. LHA

    The real TR-55 please...

    Beware, I downloaded the TR-55 .pdf from http://www.ecn.purdue.edu/runoff/documentation/Tr55.htm this morning. Procede with caution if using it blindly...Just glancing at the HSGs (Appendix A), I found 61 soils listed in my hardcopy that aren't in there (for example, Berks is not in the .pdf)...
  20. LHA

    Maximum allowable velocity in HDPE Pipe (Gravity flow)

    Is there a maximum allowable velocity in HDPE Pipe (Gravity flow)? I have manu. cuts which state they've tested abrasion resistance to 18 fps and beaten other materials. But is there a maximum design velocity? Often steep slope stormwater conveyance leads to high velocities. Any insight is...

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