Hydrohistorian
NHP-FR-079 MATTSON, A.
Monitored well · 494 · Division 1 · Water District 65
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
63 measurements from 1951-10-15 to 2026-01-13. Most recent water-level elevation 3643.86 ft, 201.7 ft below ground.
Over the record the level is decreasing at -1.22 ft per decade (p = 0.0, n = 61). 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, 1951-10-15 to 2026-01-13, 63 measurements. The record is decreasing at -1.22 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 | 210.0 ft |
| Ground elevation | 3845.56 ft |
| Location | 40.72000, -102.36000 |
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.