Topic: Canyon Creek and South Yuba Opportunistic Study Flows
|Posted: May 3, 2010Post Subject: Canyon Creek and South Yuba Opportunistic Study Flows
On Saturday, May 8 through Friday, May 14 NID will release 200 CFS through the power house below Bowman Dam, resulting in 200 cfs plus accretion on lower Canyon Creek.
Provisionally, on Saturday May 15 and Sunday, May 16 the release below Bowman into Canyon Creek will be increased to 250 cfs.
The May 15 and May 16 250 cfs release from Bowman into Canyon Creek is contingent on water being on the gates at Spaulding, enabling a release of 250 cfs out of Spaulding into the South Yuba on May 15 and 16.
The combined releases from Bowman and Spaulding will provide for study flows in all of the South Yuba reaches below the Canyon Creek confluence.
Flow Study Surveys
If you paddle any reach of Canyon Creek or the South Yuba in the next several weeks, please go to http://www.zoomerang.com/survey/web2297AJ8Q9ZL and fill out a boater survey. Survey information will be important in determining future flows in these reaches.
The contingency is the weather, particularly temperature above Spaulding, which will drive how fast the snow comes off and fills Spaulding. We will provide an update next Monday, May 10.
Opportunistic Nature of Study Flows
NIDís most recent snow survey indicates 118% of normal snow pack. The next PG&E survey will likely show a similar snow pack. Both Bowman and Spaulding will spill, and the above releases are primarily driven by operational management of spill. For example, the 200 cfs and 250 cfs releases out of Bowman Lake will generate power with water that would otherwise spill.
|Posted: May 4, 2010Post Subject: Awesome Work Bob!
Fantastic News! Many thanks to you and AW for your countless hours of effort on this. Opportunistic flow study or negotiated release, it is great to have the visibility to know when water will be in the river and having you help shape the right amount is tremendous. Another great example of AW's value in CA. Thanks Again, Bob.