Hydrohistorian
NHP-AR-097 CORLISS, MERVIN
Monitored well · 749 · Division 1 · Water District 49
Its well permit here · Well permit at DWR ↗ · DWR structure record ↗ · Its structure dossier here · Download levels (CSV)
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
54 measurements from 1968-09-09 to 2026-01-12. Most recent water-level elevation 3930.74 ft, 21.0 ft below ground.
Over the record the level is decreasing at -1.12 ft per decade (p = 0.0079, n = 54). 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, 1968-09-09 to 2026-01-12, 54 measurements. The record is decreasing at -1.12 feet per decade (p equals 0.0079), measured on water-level elevation. Rising elevation means more water. The values are downloadable as CSV from the link above.
The well itself
| Aquifer | OGALLALA |
|---|---|
| Designated basin | NORTHERN HIGH PLAINS |
| Total depth | 85.0 ft |
| Perforated interval | 25.0–85.0 ft |
| Ground elevation | 3951.74 ft |
| Reported yield | 1800.0 gpm |
| Permit | 6792 |
| Location | 39.53000, -102.47000 |
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.