Hydrohistorian
NHP-EC-019 GERWECK, GEORGE
Monitored well · 990 · 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
55 measurements from 1968-03-20 to 2026-01-18. Most recent water-level elevation 4173.4 ft, 210.7 ft below ground.
Over the record the level is decreasing at -4.8 ft per decade (p = 0.0, n = 55). 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, 1968-03-20 to 2026-01-18, 55 measurements. The record is decreasing at -4.8 feet per decade (p equals 0.0), 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 | 230.0 ft |
| Perforated interval | 170.0–230.0 ft |
| Ground elevation | 4384.1 ft |
| Reported yield | 1000.0 gpm |
| Permit | 12352 |
| Location | 38.94000, -102.41000 |
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.