Indian Valley Reservoir a Clearlake Oaks water level — California
Indian Valley Reservoir a Clearlake Oaks in California was last measured at 1,459.25 ft (datum NGVD29), as of Aug 31, 2026, 1:00 AM (UTC-07:00) (USGS Water Services). Over its recent trend window the level has been falling (−4.5 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- 205,900 acre-ft
- Recent trend
- ↓Falling
−4.5 ft over the trend window
Recent trend
Readings this station published between Jun 2, 2026 and Aug 31, 2026 — a 89-day window — downsampled for display.
Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-08-31. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).
Source: USGS site 11451290 · USACE SPK/Indian Valley, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for this lake →
About this gauge's record
This site's drainage basin covers approximately 120 sq mi of contributing watershed.
The dam behind Indian Valley Reservoir a Clearlake Oaks
Indian Valley Reservoir a Clearlake Oaks is held back by Indian Valley , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 225 ft high and running 965 ft along its crest , built across North Fork Cache Creek in Lake County , near Spring Valley . It was completed in 1975 , and is owned by Yolo County Flood Control and Water Conservation District (a local government owner) , to a design credited to CH2M Hill.
Its recorded primary purpose is irrigation — the pool is drawn down across the growing season to serve water rights downstream, then refilled over winter . It also serves irrigation;fish and wildlife pond;recreation;hydroelectric;water supply;flood risk reduction.
It is founded on rock. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. The spillway opening is 59 ft wide. Its outlet works use tainter (radial)2.
NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. Its most recent condition assessment was fair: sound under normal loading, though a rare or extreme event could expose a deficiency. That assessment is dated 09/29/2023.
At its normal pool the reservoir covers about 3,750 acres. NID records a maximum storage of 359,000 acre-ft against a normal storage of 261,000 acre-ft. Its maximum discharge capacity is 35,000 cubic feet per second. It is regulated by DWR, Safety of Dams.
Dam facts: National Inventory of Dams record CA01107 , filed by Federal Energy Regulatory Commission — U.S. Army Corps of Engineers, public domain. Water levels above come from USGS Water Services and are a separate source. (How this dam was matched to this gauge →)
How Indian Valley Reservoir a Clearlake Oaks compares nearby
All 5 nearby lakes with a current trend are also falling, suggesting a regional pattern rather than an operation specific to this dam.
Nearby lakes
The six nearest published lakes by centroid distance (great-circle) — cross-state neighbors included.
| Lake | State | Level | Distance |
|---|---|---|---|
| Clear Lake a Lakeport | CA | 1,324.02 ft | 33 km |
| Lake Mendocino-Pool | CA | 735.78 ft | 57 km |
| Lake Sonoma-Pool | CA | 449.04 ft | 57 km |
| Black Butte Lake | CA | — | 82 km |
| Black Butte Lake-Pool | CA | 446.33 ft | 83 km |
| Lake Oroville & Dam | CA | 789.74 ft | 104 km |
Frequently asked questions
- What is the current water level of Indian Valley Reservoir a Clearlake Oaks?
- As of Aug 31, 2026, 1:00 AM (UTC-07:00), the pool elevation was 1,459.25 ft (datum NGVD29), provisional and subject to revision. See the trend chart above for the recent direction.
- Is Indian Valley Reservoir a Clearlake Oaks full right now?
- Its managing agency does not publish a %-of-conservation-pool-full figure for this lake, so we show the bare level rather than estimate one.
- Where does this data come from?
- From USGS site 11451290 · USACE SPK/Indian Valley, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
More in California
See every lake tracked in California, or read the methodology behind these figures.