My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP03497
CWCB
>
Water Supply Protection
>
Backfile
>
3001-4000
>
WSP03497
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/29/2009 10:39:15 PM
Creation date
10/11/2006 11:46:37 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.140.20.A
Description
Colorado River - Colo River Basin - Orgs/Entities - CRBSF - California - Colo River Board of Calif
State
CA
Date
8/19/2003
Author
Gerald Zimmerman
Title
Executive Directors Monthly Report to the Colorado River Board of California
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
12
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />'. <br /> <br />Olpr....) <br />"Ju-::. <br /> <br />. <br /> <br />. <br /> <br />plants. Additionally, the Department of the Interior is to identify not less than three demonstration <br />projects which test the efficacy of controlling salt cedar and Russian olive with aerial herbicide <br />application, mechanical removal, and biocontrol (e.g., goats, insects, etc.). The proposed cost of each <br />project is not to exceed $7,000,000, with the federal cost-share for the projeet not to exceed 65% of <br />the total cost. The legislation would authorize the appropriation of $25,000,000 per year from 2004 <br />through 2007. <br /> <br />As we have discussed at previous meetings, much of the riparian habitat along the Lower <br />Colorado River is made up of monotypie stands of salt eedar, or saIt cedar mixed with lesser amounts <br />of native cottonwood-willow or mesquite habitat. Collectively, the riparian habitat found within the <br />riverine corridor consumes approximately 600,000 acre-feet of mainstream water arumally. Currently, <br />the LCR MSCP Conservation Strategy proposes to replace approximately 8,000 acres of existing salt <br />cedar habitat with native riparian habitat types, including cottonwood-willow, mesquite, arrowweed <br />and saltbush. Along the Lower Colorado River wholesale eradication of salt cedar is not <br />recommended at this juncture, as salt cedar is currently providing the only breeding and nesting <br />habitats for the federally-listed Southwestern willow flycatcher. The LCR MSCP participants are <br />reviewing the proposed legislation to see if the LCR MSCP could qualify for funding related to the <br />development and implementation of a demonstration project. <br /> <br />Glen Canyon Dam Adaptive Management Program <br /> <br />The Glen Canyon Dam Adaptive Management Work Group (AMWG) recently met in Phoenix, <br />Arizona on August 13-14, 2003. At the meeting, the AMWG heard reports from staff regarding the <br />following: (1) proposed experimental flow releases from Glen Canyon Dam; (2) expansion of the <br />meehanical removal of non-native fish from selected reaches of the mainstream; (3) feasibility of <br />humpback ehub population augmentation efforts; (4) science review of potential risks associated with <br />construction and operation of the proposed temperature control device on Glen Canyon Dam; (5) <br />proposed FY-2004 Budget and Work Plan; and (6) Basin hydrologie conditions. <br /> <br />The ongoing program of mechanical removal of non-native fishes from selected reaches of the <br />mainstream has been deemed a tentative success by ageney staff and fisheries biologists. As you will <br />recall, the intent of this effort was to attempt to rcduce the number of non-native rainbow and brown <br />trout near the confluence of the Little Colorado River and the mainstream in an effort to conserve the <br />dwindling population of federally-endangered humpback chub. Biologist have conducted several trips <br />with electro fishing and hoop-net equipment and have removed nearly 8,000 non-native fish, with <br />approximately 90% of the fish caught being rainbow trout. All of the euthanized non-native fish were <br />turned over to the Hualapai Indian Tribe for use as fertilizer in agriculture ventures. The Grand <br />Canyon Monitoring and Research Center has proposed to extend the program downstream several <br />more miles in an effort to further reduce populations of rainbow and brown trout thtough 2006. The <br />expanded prograin would continue the removal of non-native fish, monitoring of remaining <br />populations of native fish, including humpback ehub, and monitoring the overall abundances of all fish <br />populations in the removal reaches below the Little Colorado River confluence. <br /> <br />9 <br />
The URL can be used to link to this page
Your browser does not support the video tag.