Code of Colorado Regulations
400 - Department of Natural Resources
402 - Division of Water Resources
2 CCR 402-6 - RULES AND REGULATIONS APPLYING EXCLUSIVELY TO THE WITHDRAWAL OF GROUND WATER FROM THE DAWSON, DENVER, ARAPAHOE AND LARAMIE-FOX HILLS AQUIFERS IN THE DENVER BASIN
7 - Determination of Number of Feet of Saturated Aquifer Materials in the Denver Basin Aquifers
The thicknesses of sandstones and siltstones in the Denver Basin Aquifers are shown on the following figures:
* (Thickness from Plate 4, Figure 3E)- (Thickness from Plate 5 Figure 3F) = Thickness of Upper Arapahoe Aquifer
|
A. Upper Dawson |
Denver Basin Atlas No. 1, Plate 3, Figure 1E |
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B. Lower Dawson |
Denver Basin Atlas No. 1, Plate 2, Figure 1C |
|
C. Denver |
Denver Basin Atlas No. 2, Plate 2, Figure 2C |
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D. Upper Arapahoe |
* Denver Basin Atlas No. 3, Plate 4, Figure 3E minus Plate 5, Figure 3F |
|
E. Lower Arapahoe |
Denver Basin Atlas No. 3, Plate 5, Figure 3F |
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F. Laramie-Fox Hills |
Denver Basin Atlas No. 4, Plate 3, Figure 4C |
I.E., to find the thickness of the Upper Arapahoe Aquifer subtract the thickness value shown in Plate 5, Figure 3F from the thickness value in Plate 4, Figure 3E. Where there is no overlap between figures, Figure 3F is "O".
The thicknesses on the figures shall be considered to be the presumptive thickness of saturated aquifer material as long as the aquifer is confined, under artesian pressure. The applicant may be required by the State Engineer to demonstrate that the aquifer is still confined or, if the aquifer is unconfined, to provide data on the exact location of the water table. Upon evaluating the location of the water table, the State Engineer shall determine the thickness of saturated aquifer materials.
