deaddrift.com reports

MEMORANDUM 

TO:                  Dennis Heitmann 

From:              Marty Link 

Date:               January 21, 2000

RE:                  TeVelde Dairy

I agree with Dick's memo (January 19) that without site specific information, the local ground water flow direction and velocity will be unknown. Ground water eventually does flow toward this creek, it is not clear where it will intercept it and how quickly. 

From the regional map, you can interpret ground water flow to be toward the northwest, but not directly toward the creek in the vicinity of the dairy. Site specific information is needed to make the exact determination. 

From the regional map you can also estimate ground water velocity. I estimate between 0.5 ft/d to 0.1 ft/d. Better ground water gradient (from depth to water measurements in wells) and hydraulic conductivity estimates (from either good geologic logs or pump tests) would aid in this calculation. 

Using these values, if the ground water did flow directly to the creek, which it might not, it would have to go about 2000 - 2500 feet. At 1/2 ft/d, over 2000 feet, that is about 11 years. At 0.1 ft/d, over 2000 feet, its about 54 years. (This is ignoring the vertical distance the seepage from the lagoon to the water table.) 

There are three ground water quality monitoring wells in the vicinity. 

 Dave Jensen retrieved a summary of Storet data for surface water quality for the East Verdigre Creek, dated 1973 - 1977. This doesn't tell much, but I do have the summary.

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