Colorado River below Imperial Dam, Az-Ca

Gauge details

State

California

Drainage area

188,500 sq mi

Gauge elevation

133 ft

Subbasin (HUC-8)

15030107

Coordinates

32.86758, -114.47211

USGS site number

09429500

Records begin

1960-12-07 (66 years)

Rivermatics forecast

14-day flow outlook

14-day flow forecast

Based on observations through September 15 for Colorado River below Imperial Dam, Az-Ca. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 8 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

All values in cubic feet per second (cfs).

Common questions

When does Colorado River below Imperial Dam, Az-Ca normally run highest?

April, on the long-term record. The median daily flow that month is about 502.2 cfs, against 272.4 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.

How long has Colorado River below Imperial Dam, Az-Ca been measured?

Discharge records at USGS site 09429500 begin in 1960, about 66 years, covering roughly 2,807 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.

Is there a flow forecast for Colorado River below Imperial Dam, Az-Ca?

Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.

Where is Colorado River below Imperial Dam, Az-Ca?

The gauge sits at 32.86758, -114.47211, in California, in hydrologic subbasin 15030107, at an elevation of about 133 feet, draining roughly 188,500 square miles.

Can I use Colorado River below Imperial Dam, Az-Ca data for flood or safety decisions?

No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Colorado River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Colorado River in full.

• Colorado River below Baker Gulch near Grand Lake, CO 64 sq mi
• Colorado River below Shadow Mountain Reservoir, CO 190 sq mi
• Colorado River below Lake Granby, CO 312 sq mi
• Colorado River near Granby, CO 323 sq mi
• Colorado River at Windy Gap, near Granby, CO 788 sq mi
• Colorado River near Kremmling, CO 2,379 sq mi
• Colorado River at Catamount Bridge, CO 2,930 sq mi
• Colorado River near Dotsero, CO 4,390 sq mi
• Colorado River above Glenwood Springs, CO 4,556 sq mi
• Colorado River above Roaring Fork River at Glenwood Springs, CO 4,560 sq mi
• Colorado River below Glenwood Springs, CO 6,014 sq mi
• Colorado River below South Canyon Creek near Glenwood Springs, CO 6,050 sq mi
• Colorado River near Cameo, CO 7,986 sq mi
• Colorado River near Colorado-Utah State Line 17,849 sq mi
• Colorado River near Cisco, UT 24,100 sq mi
• Colorado River at Potash, UT 25,406 sq mi
• Colorado River at Gypsum Canyon near Hite, UT 71,200 sq mi
• Colorado River Ab Dirty Devil River near Hite, UT 75,530 sq mi
• Colorado River at Lees Ferry, AZ 111,800 sq mi
• Colorado River above Little Colorado River near Desert View 114,272 sq mi
• Colorado River near Grand Canyon, AZ 141,600 sq mi
• Colorado River above National Canyon near Supai 147,931 sq mi
• Colorado River below Hoover Dam, Az-Nv 171,700 sq mi
• Colorado River below Palo Verde Dam, Az-Ca 182,200 sq mi
• Colorado River above Imperial Dam, Az-Ca 188,500 sq mi
• Colorado River below Imperial Dam, Az-Ca this page
• Colorado River below Laguna Dam, Az-Ca 188,600 sq mi
• Colorado River below Yuma Main Canal Ww at Yuma, AZ 246,500 sq mi
• Colorado River at Nib, above Morelos Dam, AZ 246,700 sq mi
• Colorado River below Cooper Wasteway near Yuma, AZ
• Colorado River. above Gunnison River. at Grand Junction, CO

Other gauges in this subbasin

• Colorado River below Laguna Dam, Az-Ca
• Colorado Rvr above Ocean to Ocean Bridge near Yuma, AZ
• Colorado River below Yuma Main Canal Ww at Yuma, AZ
• Gila Gravity Main Canal at Imperial Dam, Az-Ca
• North Gila Main Canal near Yuma, AZ
• North Gila Main Canal No. 2 near Yuma, AZ
• All-American Canal near Imperial Dam, Ca-Az
• Reservation Main Canal near Yuma, AZ