Hydrohistorian
High Plains / Ogallala
Effectively non-recharging in eastern Colorado; declines are storage depletion, a separate ledger line.
Because this aquifer does not recharge on a human timescale, a decline here is storage being removed, not a stream being short. It is kept out of the stream-depletion math for that reason.
Water-level record
30 measurements from 1966-03-01 to 2025-08-19. Most recent water-level elevation 6336.9 ft, 16.54 ft below ground.
Over the record the level is no trend at 2.3 ft per decade (p = 0.1886, n = 30). Mann–Kendall with the Hamed–Rao autocorrelation correction, on water-level elevation; rising elevation means more water.
Chart: water level at this well over time, 1966-03-01 to 2025-08-19, 30 measurements. The record is no trend at 2.3 feet per decade (p equals 0.1886), measured on water-level elevation. Rising elevation means more water. The values are downloadable as CSV from the link above.
The well itself
| Designated basin | UPPER BLACK SQUIRREL |
|---|---|
| Total depth | 57.0 ft |
| Ground elevation | 6353.44 ft |
| Location | 38.96000, -104.38000 |
What this page is not
Monitoring records are irregular: measurements cluster where somebody chose to look, so a trend describes this well's record, not the aquifer as a whole. Levels are DWR's published measurements, unedited. A trend here is not a prediction, and it is not a determination about anyone's water right.