Hydrohistorian
NHP-FR-055 SONNENBERG
Monitored well · 507 · Division 1 · Water District 65
Its well permit here · Well permit at DWR ↗ · 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
59 measurements from 1951-08-09 to 2026-01-13. Most recent water-level elevation 4153.54 ft, 153.7 ft below ground.
Over the record the level is increasing at 4.49 ft per decade (p = 0.0, n = 59). 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, 1951-08-09 to 2026-01-13, 59 measurements. The record is increasing at 4.49 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 | 194.0 ft |
| Ground elevation | 4307.24 ft |
| Permit | 251101 |
| Location | 40.58000, -102.86000 |
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.