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  1. pigdog

    Ground (not surface) water drainage into house

    akay, If you get a posthole digger and go up-slope of the house a little ways, you could sink some "wells" down to the basement floor elevation. Get some plastic electrical conduit, or PVC and cut some slots with a hacksaw, every few inches. Cap the bottom of the pipes and stick them...
  2. pigdog

    Topo Maps

    Drewtheengineer, Natural Graphics has nation-wide digital elevation model coverage at a reasonable price. If you want DRGs, look at the state depts of nat resources or Geo dept. For instance, South Carolina has a great site. North Carolina has Nothing. Try these guys...
  3. pigdog

    Using Fly Ash to Decrease Seepage Rate In Pond

    MEM 1 I suppose this is an established use for fly ash, but you might consider running a chemical analysis of it. Somewhere I read that mercury can wind up in fly ash, though I don't know how it would survive the heat. Anyway there are other heavy metals that could also be concentrated into the...
  4. pigdog

    SPT N correlatuion to phi in rock

    longisland Here in NC, our definition of weathered rock is N=100+. Rock is 1 inch penetration for 50 blows. Either one is much more resistance than N=50. At N=50 though, you are probably going to have residual or primary rock texture that is going to control or influence the failure. (Two...
  5. pigdog

    properties of schists

    39dd, With slower feed, less water, slower rotation and pay on basis of recovery, we used to get 100% recovery in red clay saprolite using standard equip and longyear drillers. Micaceous schist core will probably yield very low unconfined compressive strength. In the ground though...
  6. pigdog

    Groundwater recharge - Open pit

    Karstad, If you have any well data from the surrounding area, you can plot water level elevations and get an idea if the water level in the pit is stable or not. If there is a dent in the water table centered around the pit, it is possibly filling up, (or draining a higher aquifer into a lower...
  7. pigdog

    Mining settlement ponds

    Hendrie, I would think that you could determine the suspended solids using a hydrometer to read the density. Before you can discharge the water, you will have to address turbidity, ph, and suspended solids. pigdog
  8. pigdog

    Mckintosh vs SPT vs CPT tests

    MRM There is a chart from a book Basic Soils Engineering, I think, that plots Presumptive Bearing Capacity against N on fields based on the GW SW SM ML SC CH-CL-Ol OH classification system. I have seen it discussed somewhere in these pages. In a past employment where I was "The...
  9. pigdog

    Mckintosh vs SPT vs CPT tests

    MRM I suppose the danger lies in reading bearing capacity off a chart from SPT without taking into account that those clays may be giving high N numbers because they are dry as a bone. We also run into problems on the other end: Just what is "rock"? Some optimist may use our...
  10. pigdog

    Mckintosh vs SPT vs CPT tests

    jdmm, Thanks, I will check it out. roger
  11. pigdog

    UC testing on Split Spoon Samples

    Hello Scotto et al If I understand, one condition that would justify the use of SPT samples is the firmness of ground. Has anyone used a Pitcher sampler? It is a sort of soil coring sampler. I found a picture and explanation here: http://www.stearnsdrilling.com/Pitcher%20Sampler.htm I have not...
  12. pigdog

    JOBSEEKING

    redevil24 First don't worry about other peoples wages. There are any number of CEOs that would be living under a bridge and picking of cans along side the road except for accidents of birth or fortune. If life was fair, I would have dollars like hairs on a dogs back, rather than hairs like...
  13. pigdog

    Mckintosh vs SPT vs CPT tests

    Hello, I have acquired doubt regarding the trustworthiness of the N from SPT, though you do get a soil sample for testing and classification. Could someone please give me a brief description and comparison of Mckintosh, SPT, and CPT probes? What is a Mackintosh probe? What would be the upper...
  14. pigdog

    Road construction on old landfill

    Hey dellbs, We found a similar site at a road-widening project for I-85. The engineers decided on "dynamic compaction". A crane comes and drops a big weight and stomps the ground down. On your site, the easiest alternative is to treat it as a maintenance issue and repair the road as...
  15. pigdog

    stormwater vault maintenance ideas???

    jebbo2, You know sometimes the result of the analysis is that because of time, money, space or other annoying elements of reality, the project won't work. Maybe in this case, the problem is keeping the mud out of the tank, rather than creating access to remove it once it is in there. How about...
  16. pigdog

    Pond excavating

    ohnesorge, What you need to do is determine where the "water table" is. The water table is a theoretical elevation, below which all of the available pore space is occupied by water. If this condition is at or near the surface, all you will have to do to make a pond is dig a hole and it...
  17. pigdog

    Seismic coefficients for slope stability analysis of dam/embankment

    Georam, I think the "seismic coefficient" method has been modified. I found a reference here in the forums by searching on "seismic" as a key word. "IBC 2000 Seismic Force Locating", in may of 2002 pointed towards the USGS and other sources for this information...
  18. pigdog

    Correlation between modulus of subgrade reaction and DCP or CBR

    DOD If you need books, try www.abebooks.com, or www.powellsbooks.com. Both of these are great sites for used books. roger
  19. pigdog

    Electric Logs

    Hey Geom I got a rental and a purchase price quote back from Layne Christensen, (Mike Culig 303-279-0171) for rental, and a rental or purchase quote from Robertson Geologging, (John Mims,281-807-6165. Websites @ www.laynechristensen.com and www.geologging.com roger
  20. pigdog

    Earthquake design

    RevanK, Check out this site for earthquake design. http://www.bssconline.org/ What you may be remembering is that the USGS has published maps of probabilities of lateral accelerations. FEMA has incorporated this information into their design reccommendations, and it also shows up in the Army...

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