Hydrohistorian
NHP-WY-075 ZWIRN, DONALD
Monitored well · 414 · Division 1 · Water District 65
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
47 measurements from 1970-04-29 to 2026-03-06. Most recent water-level elevation 4318.92 ft, 24.5 ft below ground.
Over the record the level is no trend at 0.25 ft per decade (p = 0.539, n = 46). 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, 1970-04-29 to 2026-03-06, 47 measurements. The record is no trend at 0.25 feet per decade (p equals 0.539), 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 | 65.0 ft |
| Ground elevation | 4343.42 ft |
| Permit | 14727 |
| Location | 40.39000, -102.97000 |
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.