Table 2. Differences in water-level elevations and hydraulic potential for vertical ground-water flow in monitoring-well clusters
[--, water level not recovered from well installation; NC, not calculated; NA, not applicable because difference was not calculated because one well is discharging a mixture of gas and water]
|
Site number (fig. 8) |
Geologic unit |
Hydrogeologic unit |
Water-level elevation |
Difference in water-level elevations |
Hydraulic potential for vertical ground-water flow |
|---|---|---|---|---|---|
| W1 | Wasatch Formation | Wasatch aquifer | 4,484.1 | 45 | Downward |
| C7 | Wyodak-Anderson coal bed of the Fort Union Formation | Coalbed aquifer | 4,439.1 | ||
| W2 | Wasatch Formation | Wasatch aquifer | 4,479.8 | 47.4 | Downward |
| C9 | Wyodak-Anderson coal bed of the Fort Union Formation | Coalbed aquifer | 4,432.4 | ||
| W6 | Wasatch Formation | Wasatch aquifer | -- | NC | Cannot evaluate because water level not recovered from installation of well W6 prior to measurement |
| C14 | Wyodak-Anderson coal bed of the Fort Union Formation | Coalbed aquifer | 4,433.6 | ||
| W7 | Wasatch Formation | Wasatch aquifer | 4,483.7 | 37.6 | Downward |
| C16 | Wyodak-Anderson coal bed of the Fort Union Formation | Coalbed aquifer | 4,446.1 | ||
| W8 | Tongue River Member of the Fort Union Formation | Wasatch aquifer | 4,024.0 | NA | Upward |
| C17 | Wyodak-Anderson coal bed of the Fort Union Formation | Coalbed aquifer | Flowing | ||
| W5 | Wasatch Formation | Wasatch aquifer | 4,552.5 | 18.5 | Downward |
| W4 | Wasatch Formation | Wasatch aquifer | 4,534.0 | ||
| W3 | Wasatch Formation | Wasatch aquifer | 4,479.4 | 54.6 | |
