Reservoir · California · United States · CDEC
HELL HOLE
45.9% full
Capacity
255.33 hm³
Volume stored
117 hm³
Vs month average
108% of normal
Coordinates
39.058°N, 120.407°W
Last updated
2026-11-01
Current fill
45.9%vs 7 days ago
-0.5 pplosing
vs 1 year ago
-3.1 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs November average
108%of normal
45.9% full on 2026-11-01, against an average of 42.5% for November across 6 years of readings (+3.4 points).
Drought Monitor at this site · 27 October 2026
D0abnormally dry
The ground at HELL HOLE's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. California drought figures →
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: 2026-11-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.058°N, 120.407°W · Open in Google Maps
About HELL HOLE
As of November 1, 2026, HELL HOLE is filled to 45.9% of its total capacity, holding 117.18 hm³ of water out of a maximum 255.33 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.5 pp), and it is 3.1 points below its level on the same date a year earlier.
Across the readings we hold for HELL HOLE — 1823 data points between November 3, 2021 and November 1, 2026 — the level has ranged from a low of 31.1% (January 17, 2024) to a high of 101.3% (May 21, 2023). On average the reservoir is fullest around June and at its lowest around December.
It is operated by CDEC primarily for multiple purposes. It is at 39.058°N, 120.407°W.
Key facts
- Current fill level
- 45.9% of total capacity
- Water stored
- 117.18 hm³
- Total capacity
- 255.33 hm³
- 7-day change
- ▼ 0.5 pp
- Year-on-year
- ▼ 3.1 pp
- Primary use
- Multipurpose
- Operator
- CDEC
- Coordinates
- 39.058°N, 120.407°W
- Last updated
- November 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Nov 2026 | 45.9% | 117.18 |
| 31 Oct 2026 | 46.1% | 117.78 |
| 30 Oct 2026 | 46.3% | 118.34 |
| 29 Oct 2026 | 46.3% | 118.12 |
| 28 Oct 2026 | 46.2% | 118.07 |
| 27 Oct 2026 | 46.3% | 118.18 |
| 26 Oct 2026 | 46.3% | 118.28 |
| 25 Oct 2026 | 46.4% | 118.38 |
| 24 Oct 2026 | 46.4% | 118.47 |
| 23 Oct 2026 | 46.4% | 118.59 |
| 22 Oct 2026 | 46.5% | 118.67 |
| 21 Oct 2026 | 46.5% | 118.76 |