Aspinall Unit update: 350 cfs in Black Canyon

October 22, 2014
Blue Mesa Reservoir

Blue Mesa Reservoir

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be decreased from 1150 cfs to 1050 cfs on Wednesday, October 22nd at 10:00 AM. The Uncompahgre Valley Water Users Association will be decreasing diversions to the Gunnison Tunnel Wednesday morning. Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows are expected to stay above the October baseflow target for the foreseeable future.

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow 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 800 cfs and flows in the Gunnison River through the Black Canyon are around 350 cfs. After this release change Gunnison Tunnel diversions will be around 700 cfs and flows in the Gunnison River through the Black Canyon will still be around 350 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

More Aspinall Unit coverage here.


Aspinall Unit update: 350 cfs in Black Canyon

October 14, 2014
Aspinall Unit

Aspinall Unit

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be decreased from 1250 cfs to 1150 cfs on Wednesday, October 15th at 8:00 AM. Releases are being decreased to time with the brown trout spawn. 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 October baseflow target for the foreseeable future.

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow 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 800 cfs and flows in the Gunnison River through the Black Canyon are around 450 cfs. After this release change Gunnison Tunnel diversions will still be around 800 cfs and flows in the Gunnison River through the Black Canyon will be around 350 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.


Aspinall Unit operations update: 450 cfs in Black Canyon

September 30, 2014
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.


Aspinall Unit operations update: Summer rains bolstering flows in Black Canyon

September 4, 2014

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be reduced from 1600 cfs to 1450 cfs on Wednesday, September 3rd at 1:00 PM. Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows have remained relatively high due to the August 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 baseflow target in the lower Gunnison River, as measured at the Whitewater gage, is 1050 cfs for September.

Currently, diversions into the Gunnison Tunnel are around 1050 cfs and flows in the Gunnison River through the Black Canyon are around 600 cfs. After this release change Gunnison Tunnel diversions will still be around 1050 cfs and flows in the Gunnison River through the Black Canyon should be around 450 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.


Aspinall Unit operations meeting Thursday, Septmember 4

September 2, 2014

From email from Reclamation (Erik Knight):

The next Aspinall Unit Operations Meeting will be held at the Elk Creek Visitor Center at Blue Mesa Reservoir this Thursday, September 4th at 1 PM. Handouts will be available on the website prior to the meeting.


Aspinall unit operations update: 1100 cfs through the Gunnison Tunnel diversion

August 27, 2014

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be reduced from 1800 cfs to 1600 cfs on Tuesday, August 26th at 4:00 PM. Flows in the lower Gunnison River are currently above the baseflow target of 1500 cfs. Significant rainfall has been occurring in the basin this week and the river forecast shows flows continuing to remain above the target for the 10 day forecast period.

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow target in the lower Gunnison River, as measured at the Whitewater gage, is 1500 cfs for August. For September, the baseflow target will be 1050 cfs.

Currently, diversions into the Gunnison Tunnel are 1100 cfs and flows in the Gunnison River through the Black Canyon are around 750 cfs. After this release change Gunnison Tunnel diversions will still be 1100 cfs and flows in the Gunnison River through the Black Canyon should be around 550 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.


No more fluoride dosing for Uncompahgre Water

August 9, 2014

Uncompahgre River Valley looking south

Uncompahgre River Valley looking south


From The Watch (William Woody):

Last week, the Project 7 Water Authority, which provides drinking water to the Montrose, Olathe and Delta communities (and the Menoken, Chipeta and Tri-State water districts, as well) stopped using sodium silicofluoride in its water treatment to boost fluoride levels.

At Monday’s work session of the Montrose City Council, Public Works Director John Harris explained he has already received some positive comments about the change. Harris, who also sits on the Project 7 board, said the supply of sodium silicofluoride, produced by a manufacture in Louisiana, was interrupted due to hurricane Katrina in 2005. He said that supply never recovered, leaving municipalities in the United States looking elsewhere, including China.

In July — just as supplies were running out — Harris said the Project 7 board voted in favor to end the practice.

“I’m not willing to take a risk on a Chinese-based project,” Harris told The Watch Monday. “Something would have to change to make us rethink that.”

Harris said residents can use supplemental fluoride found in toothpastes and mouthwashes, but because of the shortage, fluoride “just wouldn’t be added to the drinking water.”

Although fluoride can occur naturally, sodium silicofluoride has been used in America’s public drinking water for more than half a century, for prevention of tooth decay.Studies published by the Centers for Disease Control and Prevention suggest there has been an 18-to-40 percent reduction in cavities, in children and adults, as a direct result of water fluoridation.

In a press release, Project 7 said “sodium silicofluoride will no longer be added to boost the naturally occurring fluoride in the water to the “optimum level” as defined by the EPA…

“We can no longer obtain sodium silicoflouride that is manufactured in the USA, with the only supplier being China,” ” said Adam Turner, manager of Project 7. “We are not comfortable with the long-term quality control of the product we would be adding.”

According to the Project 7 website, water supplied to Project 7 from the Blue Mesa Reservoir contains a concentration range of naturally occurring fluoride (from 0.15 to 0.25 mg/l); the EPA limit of fluoride in water is 4 mg/l. Consuming levels higher than 4 mg/l, the EPA states, can cause bone disease and, for children, pits in their teeth…

For more information visit: http://www.project7water.org. or call 970/249-5935.

More water treatment coverage here.


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