Category Archives: Folsom Dam Operations Changes

American River Group Handouts

Posted on Monday, April 24th, 2017

Reclamation released flow projections for April through September for the lower American River at the monthly ARG meeting 4/20/17.  Peggy noted that the lower two shutters are in place for the two working penstocks. The third penstock is out for maintenance and is expected to be back online soon with the lower two shutters. They are having difficulties with the upper shutter because of debris.

Five water monitoring stations were damaged during the high water.  They are expected to be repaired/relocated by the end of April.

Click here for full ARG handouts.

Change Order

Posted on Tuesday, April 18th, 2017

Date: Tue, Apr 18, 2017 at 10:41 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

04/19/2017       0800           10,000           12,500

04/19/2017       1000           12,500           15,000

Comment:  Storage management

Issued by:  P. Manza

Change Order

Posted on Monday, April 10th, 2017

Date: Mon, Apr 10, 2017 at 12:30 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

04/11/2017       0800            8,500             9,000

04/11/2017       0900            9,000            10,000

Comment:  Storage management

Issued by:  P. Manza

Folsom Shutter Change

Posted on Monday, April 10th, 2017

Project: Folsom Dam Temperature Shutters

On Thursday, 04/13/2017, lower the bottom and middle shutters on units 1 and 2.

Folsom shutter status after changes:

Top Shutters: Units 1, 2, & 3 – raised
Middle Shutters: Units 1, 2 lowered unit 3 – raised
Bottom Shutters: Units 1, 2 lowered unit 3 – raised

Comment: Temperature shutter elevation requirement

Issued by: Peggy Manza

Change Order- Cancellation

Posted on Wednesday, April 5th, 2017

Date: Wed, Apr 5, 2017 at 11:36 AM
Subject: Nimbus Dam – Change Order

Please CANCEL the following release changes:

Date               Time         From (cfs)      To (cfs)

04/05/2017      2000            8,500             8,300

04/06/2017      2000            8,300             8,000

04/06/2017      2100            8,000             7,650

04/06/2017      2200            7,650             7,300

04/07/2017       2000            7,300             7,000

04/07/2017       2100            7,000             6,700

04/07/2017       2200            6,700             6,500

Releases will remain at 8500 cfs until further notice.

Comment:  Upcoming rain event

Issued by:  P. Manza

Change Order

Posted on Wednesday, March 29th, 2017

Date: Wed, Mar 29, 2017 at 10:12 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

03/29/2017      2000            15,000             14,000

03/29/2017      2100            14,000             13,000

 

03/30/2017       2000            13,000             12,300

03/30/2017       2100            12,300             11,600

03/30/2017       2200            11,600             11,000

 

03/31/2017      2000            11,000             10,500

03/31/2017      2100            10,500             10,000

03/31/2017      2200            10,000               9,500

 

04/01/2017      2000              9,500               9,100

04/01/2017      2100              9,100               8,700

04/01/2017      2200              8,700               8,500

Comment:  Storage management

Issued by:  P. Manza

Change Order

Posted on Friday, March 24th, 2017

Date: Fri, Mar 24, 2017 at 10:26 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

03/27/2017      0800             5,000             7,500

03/27/2017      1000             7,500           10,000

 

03/28/2017      0800            10,000           12,500

03/28/2017      1000            12,500           15,000

Comment:  Inflow management

Issued by:  P. Manza

Change Order — Correction

Posted on Monday, March 6th, 2017

Date: Mon, Mar 6, 2017 at 10:58 AM
Subject: Nimbus Dam – Change Order – CORRECTION

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

03/09/2017      0100             6,400             6,150

03/09/2017      0300             6,150             5,900

03/09/2017      0500             5,900             5,650

 

03/10/2017      0100              5,650             5,400

03/10/2017      0300              5,400             5,150

03/10/2017      0500              5,150             5,000

Comment:  Inflow management, CHANGED RELEASE TIMES TO NIGHTTIME TO REDUCE STRANDING OPPORTUNITIES

Issued by:  P. Manza

Change Order

Posted on Wednesday, March 1st, 2017

Date: Tue, Feb 28, 2017 at 4:53 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

03/01/2017      0800            20,000             18,650

03/01/2017      1000            18,650             17,300

03/01/2017      1200            17,300             16,000

 

03/02/2017      0800            16,000             15,000

03/02/2017      1000            15,000             14,000

03/02/2017      1200            14,000             13,000

 

03/03/2017       0800            13,000             12,300

03/03/2017       1000            12,300             11,600

03/03/2017       1200            11,600             11,000

 

03/04/2017      0800            11,000             10,500

03/04/2017      1000            10,500             10,000

03/04/2017      1200            10,000               9,500

 

03/05/2017      0800              9,500               9,100

03/05/2017      1000              9,100               8,700

03/05/2017      1200              8,700               8,300

 

03/06/2017       0800             8,300               8,000

Comment:  Storage management

Issued by:  P. Manza

Change Order

Posted on Tuesday, February 28th, 2017

Date: Mon, Feb 27, 2017 at 4:36 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

02/28/2017       0800        30,000             28,000

02/28/2017       1000        28,000             26,000

02/28/2017       1200        26,000             24,000

02/28/2017       1400        24,000             22,000

02/28/2017       1600        22,000             20,000

Comment:  Inflow management

Issued by:  P. Manza