Hydrohistorian
DB-118 CASTLE ROCK WELL 16
Monitored well · 167 · Division 1 · Water District 8
Its well permit here · Well permit at DWR ↗ · DWR structure record ↗ · Its structure dossier here · Download levels (CSV)
Denver Basin bedrock
Confined sandstone aquifer; negligible human-timescale recharge — pumping is one-way storage mining.
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
24 measurements from 1991-04-17 to 2026-05-09. Most recent water-level elevation 6023.0 ft, 322.0 ft below ground.
Over the record the level is decreasing at -7.19 ft per decade (p = 0.0308, n = 24). 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, 1991-04-17 to 2026-05-09, 24 measurements. The record is decreasing at -7.19 feet per decade (p equals 0.0308), measured on water-level elevation. Rising elevation means more water. The values are downloadable as CSV from the link above.
The well itself
| Aquifer | DAWSON |
|---|---|
| Designated basin | DENVER BASIN |
| Perforated interval | 356.0–652.0 ft |
| Ground elevation | 6345.0 ft |
| Permit | 26505 |
| Location | 39.35000, -104.86000 |
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.