Gauge Description:

Min and max flow are just a rough guide. Modern-day flows are limited by maximum output from the river outlet works and power plant which is 48,200 cfs. Historically flows were regularly greater than 100,000 cfs during spring snow melt, but now that can only occur if the reservoir reaches the spillways.

Gage:
Lees Ferry
Historical flow At Lees Ferry

USGS reports flows at several locations along the river.  
Colorado River near Grand Canyon, AZ  
Colorado River above Diamond Creek near Peach Springs, AZ

 

Lake Mead reservoir levels  are reported by the Bureau of Reclamation in feet.   Google maps reports in meters. 

A lake elevation of 1105 feet (sept. 2008) is equivalent to 337 meters. At this elevation the river meets lake near the end of Iceburg Canyon, which is 6 miles from South Cove.

Gauge Information

Name Range Difficulty Updated Level
COLORADO RVR ABV DIAMOND CREEK NR PEACH SPRINGS AZ
usgs-09404200 4000 - 48000 cfs III-IV 08h27m 12000 cfs (running)

gauge graph
RangeWater LevelDifficultyComment
4000 -48000 cfs barely runnable-high runnable III-IV gauge is important or has warning
COLORADO RIVER NEAR GRAND CANYON, AZ
usgs-09402500 4000 - 48000 cfs III-IV 10h42m 12600 cfs (running)

gauge graph
RangeWater LevelDifficultyComment
4000 -48000 cfs barely runnable-high runnable III-IV gauge is important or has warning
COLORADO RIVER AT LEES FERRY, AZ
usgs-09380000 4000 - 48000 cfs III-IV 09h57m 12200 cfs (running)

gauge graph
RangeWater LevelDifficultyComment
4000 -48000 cfs barely runnable-high runnable III-IV gauge is important or has warning

Reports give the public a chance to report on river conditions throughout the country as well as log the history of a river.

When River/Gauge Subject Level Reporter
Colorado [AZ] moenkopi paddle raft in upset 10,000 Brady Black
[ ] elves chasm n/a wreeves
Colorado [AZ] President Harding Rapid n/a Thomas O'Keefe
Colorado [AZ] Grand Canyon n/a Thomas O'Keefe
[AZ] Rafting on the Grand Canyon n/a Jason Robertson
230d17h31m Colorado River [AZ] Grand Canyon happy face a good level Evan Stafford
2y19d02h47m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) roaring 20s 0 cfs christopher pratt
2y19d02h47m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] hermit rapid 0 cfs christopher pratt
2y19d02h47m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] the gems rapids 0 cfs christopher pratt
2y68d13h56m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Hance Rapid a good level christopher pratt
3y233d12h56m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Grand Canyon Trip 10000 cfs Thomas O'Keefe
7y31d16h13m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Griff Gilbert at Havasu 18000 cfs Dennis Huntley
7y38d16h13m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Griff Gilbert at Deer Creek in the Canyon 18000 cfs Dennis Huntley
7y59d16h13m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Nankoweep Graneries 18000 cfs Dennis Huntley
7y220d13h56m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Roman Ryder @ Lava Falls 0 cfs Roman Ryder
7y342d07h11m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] The Big Ditch!! 0 cfs Frank J Perruccio
8y225d07h56m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] The Grand n/a Lee Timmons
8y225d07h57m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Camp Site n/a Lee Timmons
8y225d08h01m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] New Year's Eve n/a Lee Timmons
8y225d08h07m /Colorado-Lees Ferry to Lake Mead (Grand Canyon) [AZ] Float the Flat n/a Lee Timmons