Hydrohistorian
NHP-PL-197 VASSIOS, G & V
Monitored well · 954 · Division 1 · Water District 49
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
3350 measurements from 1977-08-18 to 2026-06-18. Most recent water-level elevation 5038.64 ft, 48.65 ft below ground.
Over the record the level is increasing at 1.39 ft per decade (p = 0.0014, n = 3350). 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, 1977-08-18 to 2026-06-18, 3350 measurements. The record is increasing at 1.39 feet per decade (p equals 0.0014), 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 | 63.0 ft |
| Ground elevation | 5087.29 ft |
| Location | 39.13000, -103.10000 |
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.