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  1. civilman72

    Sewer Main Vacuum Testing

    HTURKAK, Thank you! That has the vacuum testing spec for SS mains I was looking for. As I said, many of the local Districts here allow this type of testing, but no one has updated their Technical Specs in >10yrs. The spec you sent is from 2021, which is likely why it's included.
  2. civilman72

    Sewer Main Vacuum Testing

    Thanks bimr, That spec shows air-pressure test specs for ss mains, not vacuum tests for ss mains, which is what I'm looking for.
  3. civilman72

    Sewer Main Vacuum Testing

    Anyone have any insight or experience with vacuum testing for sanitary sewer mains, and/or any relevant testing specifications from a pipe manufacturer or water/sewer district? Quick background: It’s standard practice for many local water/sewer districts to perform vacuum testing on sanitary...
  4. civilman72

    How can you tell when a grading model is done well in Civil 3D?

    Review surface in 3D view, and/or review the surface with 0.1'/0.5' minor/major contours.
  5. civilman72

    Manholes with vertical PVC pipe inside. Can anyone identify what these are?

    Possibly cleanouts for a storm sewer pipe?
  6. civilman72

    Minimum Foundation Wall Height above Grade Code confusion

    Finished grade from a design standpoint is what you step on. But finished grade for this code is dirt, or final backfill material that's placed against the concrete foundation wall. As others stated, it's not concrete, asphalt, or other hard surface materials.
  7. civilman72

    civil engineering in 1 min that will be useful for the entire career

    During the first week of my first engineering job my boss, who had been an engineer for >30 years, asked me to name the three most important things to consider in civil engineering. After staring at the blank look on my face for 10 seconds, he answered his own question: 1. Water 2. Water, and...
  8. civilman72

    Finished Floor Elevation Recomendation

    Too many factors to consider to give you good direction. Earthwork should be a consideration, and will likely mean you want to keep the home as low as possible, but that could also be a detriment to view corridors (if they exist). You could lower the garage and use a trench grate to keep water...
  9. civilman72

    Landscaping Plans

    Make sure they don't put trees on top of utility lines. Keep trees out of the road clear zone.
  10. civilman72

    Cross slope of driveway

    I can't tell in your sketch where the garage is located, but regardless, it looks like you are sloping the driveway towards the building. You need a low point away from the building which means your driveway will likely get steeper.
  11. civilman72

    High Ground Water vs. Laying Sanitary Pipe

    After reading your post, what caught my attention was the "truckloads of boulders" used as backfill, likely to try to stabilize the saturated soil. If the voids in the placed large boulders were not properly filled and compacted, this is likely the reason you are seeing the settling in the...
  12. civilman72

    Roadway Design Controls and Design Criteria

    Example: Speed Limit: 35 MPH (Local) 45 MPH (Collector) 55 MPH (Arterial) Your design criteria is the Speed Limit, your design control is your road classification. The recommended values for the criteria are determined by the design control information.
  13. civilman72

    Gravel Parking Lot Slopes

    We usually shoot for 3% min. grades on gravel surfaces, so I agree with your concerns. I would think if you express your concerns to your client in writing, and he/she responds and acknowledges your concerns in writing, you should be exonerated from future liability.
  14. civilman72

    Safety effects of speed limits relative to the 85% speed

    BigInch - While poor design plays a bigger part in accidents than speed limits do, speed limits do have an impact on safety. Particularly when unrealistic speed limits are set, which often creates large discrepancies in vehicular speeds, which leads to more accidents.
  15. civilman72

    Would you consider 8" CABC with 3" of topsoil to be pervious for storm drainage purposes?

    In general, almost all construction materials have some value of imperviousness, even concrete. But for the purposes of infiltration and water quality attributes, compacted roadbase/gravel is generally not considered "impervious." The addition of topsoil may help improve the situation, but 3"...
  16. civilman72

    FLOODED Crawlspace

    This is generally not a one-size-fits-all solution. Depends on a lot of factors, that have been discussed in numerous previous threads. Did you try doing a search? The idea that a sump pump will encourage more water is generally not true. If anything it will lower the hydrostatic pressure...
  17. civilman72

    Failing Septic System

    We dug a hole next to the leach field and did not find any water, so we're fairly certain the culprit is not groundwater. I've discussed our issues with a lot of other experts in the field and everyone is perplexed. Best assumption is that the leech field is plugged from accelerated biomat...
  18. civilman72

    Failing Septic System

    We are in the process of selling our house and the inspector brought up concerns with our septic system. Turns out there's about 8"-12" of standing water in the leech field inspection port. The tank is 3-chambers, 1,500 gallons with a siphon in the last chamber. It appears that the siphon is...
  19. civilman72

    Concrete Pan Reinforcement

    Thanks guys. I just spoke with the geotech and they stated they actually avoid recommending reinforcement, even in thicker concrete sections, unless it's on a major highway. They said they've seen too many issues with rebar here in the harsher environments of Colorado. I'll try to do some...
  20. civilman72

    Concrete Pan Reinforcement

    We are designing a large truck delivery parking lot re-paving project and are adding a 12' wide concrete pan to replace a small portion of the existing asphalt. The geotech pavement resurfacing options are: (1) 11" of asphalt on 12" stabilized subgrade or (2) an 11" concrete section with 12"...

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