Reservoir · California · United States · CDEC
HIDDEN DAM (HENSLEY)
10.3% full
Capacity
79.31 hm³
Volume stored
8 hm³
Vs month average
60% of normal
Coordinates
37.110°N, 119.885°W
Last updated
2026-10-14
Current fill
10.3%vs 7 days ago
0.0%stable
vs 1 year ago
-1.1%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
60%of normal
10.3% full on 2026-10-14, against an average of 17.3% for October across 6 years of readings (-7.0 points).
Data source: CDEC — California Dept of Water Resources — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.110, -119.885 · Open in Google Maps
About HIDDEN DAM (HENSLEY)
As of October 14, 2026, HIDDEN DAM (HENSLEY) is filled to 10.3% of its total capacity, holding roughly 8 hm³ of water out of a maximum 79 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 1.1 points below its level on the same date a year earlier.
Across the readings we hold for HIDDEN DAM (HENSLEY) — 1821 data points between October 16, 2021 and October 14, 2026 — the level has ranged from a low of 7.5% (October 22, 2022) to a high of 102.0% (May 14, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 37.110°N, 119.885°W.
Key facts
- Current fill level
- 10.3%
- Water stored
- 8 hm³
- Total capacity
- 79 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 1.1 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 37.110°N, 119.885°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 10.3% | 8 |
| 12 Oct 2026 | 10.3% | 8 |
| 11 Oct 2026 | 10.3% | 8 |
| 10 Oct 2026 | 10.6% | 8 |
| 9 Oct 2026 | 10.3% | 8 |
| 6 Oct 2026 | 10.3% | 8 |
| 5 Oct 2026 | 10.3% | 8 |
| 4 Oct 2026 | 10.3% | 8 |
| 3 Oct 2026 | 10.3% | 8 |
| 2 Oct 2026 | 10.3% | 8 |
| 1 Oct 2026 | 10.3% | 8 |
| 30 Sep 2026 | 10.3% | 8 |