Reservoir · California · United States · CDEC
LITTLE GRASS VALLEY
56.3% full
Capacity
114.73 hm³
Volume stored
65 hm³
Vs month average
97% of normal
Coordinates
39.724°N, 121.019°W
Last updated
2026-10-13
Current fill
56.3%vs 7 days ago
-5.8%losing
vs 1 year ago
+3.3%year-over-year
7-day trend
↓falling
Drought context
Storage vs October average
97%of normal
56.3% full on 2026-10-13, against an average of 57.8% for October across 6 years of readings (-1.5 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: 2026-10-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.724, -121.019 · Open in Google Maps
About LITTLE GRASS VALLEY
As of October 13, 2026, LITTLE GRASS VALLEY is filled to 56.3% of its total capacity, holding roughly 65 hm³ of water out of a maximum 115 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 5.8 percentage points, and it is 3.3 points above its level on the same date a year earlier.
Across the readings we hold for LITTLE GRASS VALLEY — 1823 data points between October 16, 2021 and October 13, 2026 — the level has ranged from a low of 49.5% (December 6, 2021) to a high of 93.5% (May 28, 2024). On average the reservoir is fullest around June and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 39.724°N, 121.019°W.
Key facts
- Current fill level
- 56.3%
- Water stored
- 65 hm³
- Total capacity
- 115 hm³
- 7-day change
- ▼ 5.8 pts
- Year-on-year
- ▲ 3.3 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 39.724°N, 121.019°W
- Last updated
- October 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Oct 2026 | 56.3% | 65 |
| 12 Oct 2026 | 57.1% | 66 |
| 11 Oct 2026 | 58.0% | 66 |
| 10 Oct 2026 | 58.8% | 67 |
| 9 Oct 2026 | 59.6% | 68 |
| 8 Oct 2026 | 60.4% | 69 |
| 7 Oct 2026 | 61.2% | 70 |
| 6 Oct 2026 | 62.1% | 71 |
| 5 Oct 2026 | 62.9% | 72 |
| 4 Oct 2026 | 63.7% | 73 |
| 3 Oct 2026 | 64.5% | 74 |
| 2 Oct 2026 | 65.4% | 75 |