Category Archives: Folsom Dam Operations Changes

Change Order

Posted on Wednesday, February 8th, 2017

Date: Wed, Feb 8, 2017 at 2:23 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

02/08/2017       1600        30,000             35,000

02/08/2017       1700        35,000             40,000

Comment:  Flood control

Issued by:  P. Manza

Change Order

Posted on Monday, February 6th, 2017

Date: Mon, Feb 6, 2017 at 9:40 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

02/06/2017       1200        15,000             17,500

02/06/2017       1300        17,500             20,000

02/06/2017       1400        20,000            23,500

02/06/2017       1500        23,500            27,000

02/06/2017       1600        27,000            30,000

Comment:  Flood control

Issued by:  P. Manza

Change Order

Posted on Friday, February 3rd, 2017

Date: Fri, Feb 3, 2017 at 3:27 PM
Subject: Nimbus Dam – Change Order – CORRECTION

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

02/04/2017       0800        7,250             10,000

02/04/2017       0900        10,000            12,500

02/04/2017       1000        12,500            15,000

Please prioritize releases above power plant capacity thru the upper outlets as much as possible.

Comment:  Flood control/Storage management

Issued by:  P. Manza

Change Order- Revised

Posted on Monday, January 30th, 2017

Date: Mon, Jan 30, 2017 at 9:53 AM
Subject: Nimbus Dam – Change Order REVISED

Please make the following release changes to the American River.  This change order supersedes the previous order and cancels the previous remaining release changes.  Releases will remain at the specified release detailed below:

Date               Time         From (cfs)           To (cfs)

01/31/2017       0100            7,300               7,000

01/31/2017       0300            7,000               6,700

01/31/2017       0500            6,700               6,400

Comment:  Storage management

Issued by: R. Field

Change Order

Posted on Monday, January 23rd, 2017

Date: Mon, Jan 23, 2017 at 2:37 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)           To (cfs)

01/30/2017       0800           8,000                7,650

01/30/2017       1000           7,650                7,300

01/31/2017       0800            7,300               7,000

01/31/2017       1000            7,000               6,700

01/31/2017       1200            6,700               6,400

02/01/2017       0800            6,400               6,150

02/01/2017       1000            6,150               5,900

02/01/2017       1200            5,900               5,650

02/02/2017       0800            5,650               5,400

02/02/2017       1000            5,400               5,150

02/02/2017       1200            5,150               5,000

Comment:  Storage management

Issued by:  P. Manza

Change Order

Posted on Saturday, January 14th, 2017

Date: Fri, Jan 13, 2017 at 3:14 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

01/14/2017       0800        40,000             35,000

01/14/2017       0900        35,000             30,000

Comment:  Flood control/Storage management

Issued by:  P. Manza

Change Order

Posted on Friday, January 13th, 2017

Date: Fri, Jan 13, 2017 at 10:46 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

01/13/2017       1500        50,000             45,000

01/13/2017       1600        45,000             40,000

Comment:  Flood control/Storage management

Issued by:  P. Manza

Change Order

Posted on Thursday, January 12th, 2017

Date: Thu, Jan 12, 2017 at 11:40 AM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

01/12/2017       1500        60,000             55,000

01/12/2017       1600        55,000             50,000

Comment:  Flood control/Storage management

Issued by:  P. Manza


Here is USACE’s current storage graph.

Change Order

Posted on Tuesday, January 10th, 2017

Date: Tue, Jan 10, 2017 at 3:19 PM
Subject: Nimbus Dam – Change Order

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

01/10/2017       1600        50,000             55,000

01/10/2017       1700        55,000             60,000

Comment:  Flood control/Storage management

Issued by:  P. Manza

Change Order

Posted on Sunday, January 8th, 2017

After some back and forth about how high the flows should go, Reclamation has settled on 60,000 cfs by 5pm today. The change order is below. Here is a nifty link from the CA NV River Forcast Center about projected inflow.


Date: Sun, Jan 8, 2017 at 5:33 PM
Subject: Nimbus Dam – Change Order – CLARIFICATION

Please make the following release changes to the American River

Date               Time         From (cfs)      To (cfs)

1/09/2017       1200        30,000             35,000

1/09/2017       1300        35,000             40,000

1/09/2017       1400        40,000             45,000

1/09/2017       1500        45,000             50,000

1/09/2017       1600        50,000             55,000

1/09/2017       1700        55,000             60,000

Comment:  Changed timing of increased releases due to changes in projected inflows to Folsom.

Issued by:  P. Manza