This page was last updated July 9, 2020 - 9:00 a.m.

General information about Alamo Dam and the Bill Williams River is available on the US Army Corps of Engineers Alamo Dam webpage .

Alamo Dam Water Control Plan Update

The Corps is commencing a process to update the Alamo Dam Water Control Plan. Additional information about the update is available at http://www.spl.usace.army.mil/Media/Fact-Sheets/Article/1511614/alamo-dam-water-control-plan/

Alamo Dam Releases 2020

June/July

The US Army Corps of Engineers continues to release water from Alamo Lake to allow for maintenance activities at the dam. These releases will occur through July 17. See the latest tentative schedules and updates:


Given the travel time from flows entering Lake Havasu to the CAP intake, and then to the Waddell Canal, Phoenix area customers could see turbidity and TOC impacts as early as 10-14 days after releases. However, CAP is currently blending Lake Pleasant water at greater than 50%, which should help to minimize impacts.

CAP will be sampling turbidity and TOC at our Lake Havasu intakes as conditions dictate (Alamo flows reach Lake Havasu), and may add more sites if necessary. Results of the sampling efforts, as well as data shared by our stakeholders will be posted to this webpage as soon as they become available.

Turbidity
Date Lake Havasu (MWP) Phoenix (Union Hills) Phoenix (Lake Pleasant)
6/15/2020      
6/16/2020      
6/17/2020 1.28 0.30 6.11
6/18/2020 1.08 0.25 5.70
6/19/2020   0.26 6.25
6/20/2020   0.25  
6/21/2020   0.21  
6/22/2020 0.95 0.34 6.60
6/23/2020 0.73 0.36 4.87
6/24/2020 0.68 0.32 5.71
6/25/2020 0.71 0.21 5.98
6/26/2020   0.16 5.56
6/27/2020   0.16  
6/28/2020   0.16  
6/29/2020   0.16 5.14
6/30/2020   0.32 6.30
7/1/2020   0.21 5.96
7/2/2020   0.21  
7/3/2020   0.26  
7/4/2020   0.17  
7/5/2020   0.17  
7/6/2020   0.22 3.87
7/7/2020   0.16 5.85
7/8/2020   0.23 8.08
7/9/2020      

TOC
Date Bill Williams (95 Bridge) Lake Havasu (MWP) Glendale (Pyramid) Phoenix (Union Hills) Phoenix (Lake Pleasant)
6/15/2020     2.96    
6/16/2020     2.99    
6/17/2020     3.04 3.26 3.22
6/18/2020     3.01 3.22 3.24
6/19/2020     3.06 3.23 3.22
6/20/2020     3.06 3.22  
6/21/2020     3.01 3.23  
6/22/2020     3.01 3.20 3.21
6/23/2020 3.54 2.90 3.00 3.26 3.21
6/24/2020     3.10 3.31 3.18
6/25/2020     3.07 3.22 3.20
6/26/2020     3.13 3.23 3.21
6/27/2020       3.24  
6/28/2020     3.09 3.25  
6/29/2020     3.14 3.32 3.22
6/30/2020   3.24 3.17 3.26 3.10
7/1/2020     3.06 3.22 3.20
7/2/2020     3.14  3.25  
7/3/2020     3.10 3.23  
7/4/2020     3.04 3.26  
7/5/2020     3.14  3.29  
7/6/2020    3.59 3.13 3.23 3.18
7/7/2020       3.29 3.19
7/8/2020       3.27 3.19
7/9/2020          
March/May

Spring rains in central Arizona have filled our reservoirs, and in some cases, have required “flood” releases to restore to normal operating capacity. Alamo Lake is one of these reservoirs and the US Army Corps of Engineers began to release water in mid-March. Click on the link below to read about the releases and impacts to the CAP System.

CAP Briefing Document

As the US Army Corps of Engineers releases water from Alamo Dam, CAP monitored Total Organic Carbon (TOC) in the Bill Williams River as it enters Lake Havasu, at the CAP intakes, and at Salome Rd (approximately 70 miles west of the City of Glendale). These measurements helped to provide our municipal customers with advance notification of increased organic loads as a result of the Alamo releases. CAP is working with Eurofins and the City of Glendale to analyze these samples and data is posted as soon as it becomes available.

See the TOC data