NOAA weather forecasts go hyper-local with new weather model

Water Values Podcast: Hear what’s accelerating water innovation

On this day in 1935, President Roosevelt dedicated what is now Hoover Dam #ColoradoRiver

Colorado Flood Updates offline until spring

Ever wondered where greenhouse gas emissions in the US come from?

Transmountain Diversions connect us all — Water Quality and Quantity Blog

Colorado transmountain diversions via the State Engineer's office
Colorado transmountain diversions via the State Engineer’s office

Here’s a report about last week’s Colorado Foundation for Water Education transbasin diversion tour from the Water Quality and Quantity Blog. Here’s an excerpt:

Because QQ works to address environmental (and resulting economic) impacts from transmountain diversions, the best part of the tour for me was gaining a better appreciation for how interconnected the State is through transmountain diversions.

The Arkansas Valley is the recipient of water that is diverted through complex tunnel systems, or simple diversion ditches, from the western side of the Continental Divide to water population centers on the Front Range. The tour focused primarily on the benefits that historic transmountain diversions (TMDs) have provided to the Eastern Slope. Chaffee County Commissioner Dennis Giese even thanked the West Slope for the water that makes their recreation and ranching economies thrive (a touching gesture that does not happen enough in dialogue across the divide).

We saw the first-ever TMD, the Ewing Ditch, and walked along the ¾ mile ditch from the diversion point to the point it crosses the Continental Divide. We saw TMDs of a much larger scale too, watching water blast from the side of a mountain, bringing water from Homestake Reservoir in the Eagle River basin through a 5-mile tunnel to Turquoise Reservoir and the Arkansas River basin.

More Colorado Foundation for Water Education coverage here.

Aspinall Unit operations update: 450 cfs in Black Canyon

Aspinall Unit
Aspinall Unit

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be reduced from 1450 cfs to 1350 cfs on Tuesday, September 30th at 9:00 AM. The Uncompahgre Valley Water Users Association will be reducing diversions into the Gunnison Tunnel by 100 cfs on Tuesday morning. Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows have remained relatively high due to the September rains and flows are expected to stay above the September baseflow target at the new rate of release.

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the base-flow target in the lower Gunnison River, as measured at the Whitewater gage, is 1050 cfs for September through December.

Currently, diversions into the Gunnison Tunnel are around 1050 cfs and flows in the Gunnison River through the Black Canyon are around 450 cfs. After this release change Gunnison Tunnel diversions will be around 950 cfs and flows in the Gunnison River through the Black Canyon should still be around 450 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

More Aspinall Unit coverage here.