Drainage problem

In those with structural or drainage problems the risk exists of ascending infection... 

It has been suggested that it might be possible to retain the weep hole while venting the upper blocks above grade to allow soil gas to escape. This idea would need to be combined with an interior barrier such as paint. In general, weep holes should be avoided and if drainage problems are expected, an exterior drainage should be installed. 

Lind, C. J. and J. D. Hem, 1993, Manganese minerals and associated fine particulates in the streambed of Pinal Creek, Arizona, U.S.A., a mining-related acid drainage problem. Applied Geochemistry 8, 67-80. 

Caruccio, F. T. Ferm, J. C. 1974. Paleoenviron-ment - predictor of acid mine drainage problems. Proceedings of the 5th Coal Mine Drainage Research Symposium, National Coal Association (USA), Kentucky, 5-9. 

Hemingway, B. S., Seal, R. R. Ming Chou, I. 2002. Thermodynamic Data for Modeling Acid Mine Drainage Problems Compilation and Estimation of data for Selected Soluble Iron-Sulfate Minerals. United States Geological Survey Open File Report 02-161. 

The application of hydrodynamics to irrigation and drainage problems Hilgardia, 2 479-528. 

In those with structural or drainage problems the risk exists of ascending infection to involve the kidney and occasionally the bloodstream. Although structural abnormalities may be absent in women of childbearing years, infection can become... 

Caruocio, F. T., and J. C. Perm. 1974. Paleoenvironment-predictor of acid mine drainage problems. Proc. 5th symp. on coal mine drainage, pp. 5-10. Washington, DC Natl. Coal Assoc. 

According to Davis and Ashenberg (1989), the results of the simulations provide some useful information for the evaluation of the feasibility of using alkaline tailings fluid to neutralize Berkeley Pit water as a remedial action. The authors calculated that it needs three volumes of alkaline fluids to neutralize the pit lake water to pH of 5.0 with the Case 3 scenario. That would result in a water level 20 m above the contact between the alluvial aquifer and the subjacent bedrock, assuming all inflows into the pit except alluvial and bedrock groundwater contributions can be controlled. The authors concluded that this remedial alternative is a tractable solution to the acid mine drainage problems at the Berkeley Pit. 

Moulton, E.Q. (Ed.). 1957. The acid mine-drainage problem in Ohio. Ohio State University Studies. Eng. Expt. Sta. Bull. No. 166. 

A drainage problem involving Zdtsdi s analysis is presented below. 

Suppose that the problem involves a length of 2-in.-diameter. Schedule 80 rigid PVC pipe holding water under a pressure of 50 psi at room temperature. The maximum allowable sag or deflection between supports is 0.25 in., which is a realistic value actually used to avoid drainage problems. It is also required that the pipe sag by not more than this amount after 10,000 hours of service. There are no wind loads and the material has an initial elastic modulus of 450,000 psi. It can now be shown that the 2-in.-diameter PVC pipe filled with water has a weight of 0.194 Ib./ft. 

Finished grade within a struaure should be 12 in (300 mm) higher than grade outside to avoid drainage problems. 

If the dock-well surface area is covered with snow or ice, the wheel chocks may not be effective in providing security from trailer movement. If a sloped dock well has a drainage problem, the dock well could easily have 4 to 6 inches of water in it. This condition makes it less likely that anyone would venture out to install or remove wheel chocks. 

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