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BO Assumptions and Disputed Issues
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BO Assumptions and Disputed Issues
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Last modified
1/26/2010 4:36:27 PM
Creation date
5/28/2009 11:27:00 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8461.100
Description
Adaptive Management Workgroup (PRRIP)
State
CO
Basin
South Platte
Water Division
1
Date
1/1/3000
Author
Unknown
Title
BO Assumptions and Disputed Issues
Water Supply Pro - Doc Type
Biological Opinion
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<br />The BO assumes the Program includes "substantial clearing and leveling of river islands." <br />[BO p. 317]. Specifically, the GC-2 Alternative assumes the conversion of wooded <br />islands to wetted channel through leveling of islands and moving sand back into the river <br />channel at a rate of 50 acres per year throughout the term of the ls` Increment. This <br />aggressive island leveling plan is the scenario portrayed in the DEIS that is considered to <br />control channel degradation, increase open view widths, and build sandbars. [DEIS pp. 5- <br />52 to 5-53; 5-156, etc.] In fact, the sediment component of the Proposed Program <br />recognizes that much uncertainty exists about potential outcomes with these sorts of <br />management activities and responds to concerns regarding potential undesired impacts on <br />adjoining lands. The Program's IlVIRP thus embraces phased stair-stepped adaptive <br />management approach beginning with data gathering, further investigations of potential <br />management methods, development of testing approaches, and implementation of small- <br />scale testing of management methods that, if successful in outcome, would be tested at a <br />progressively larger scale before adopted as a routine management activity for Program <br />lands. [IMRP, Att. 3, III.C., p. 141. The Proposed Program does not commit to implement <br />the large-scale in-channel sediment management prescriptions in advance of them <br />"proving up." If they do not prove successful or have unacceptable negative effects, <br />alternative management activities and methods will be explored. <br />Restoration of natural riverine functions as a Program Objective. <br />The BO assumes development of a"scientific adaptive management framework" that <br />includes restoration of a semblance of natural riverine functions and processes (i.e., <br />sediment supply and transport, a more normalized flow regime, and floodplain <br />connectivity) as a specific Program objective. [BO p. 3171 <br />The June 14-15 Agreement specifically retained language that the creation, protection and <br />improvement of peak, pulse and other flows (aside from annual pulse flows) are not part <br />of the 1S` Increment water objective. It recognized that the Program would integrate its <br />land and water management activities with the IMRP, Program Adaptive Manangement, <br />and system constraints to enable evaluation of these issues, and that FWS could use <br />Program water subject to its discretion to attempt to achieve a more normalized flow <br />regime given system constraints. <br />6. No consideration of hydrocycling. [BO p. 193] <br />7. No consideration of impacts to peaks under Future Depletions Plans. [BO p. 193] <br />8. Habitat "surrogates" for incidental take (discussed at the meeting between Colo/FWS on <br />August 26). <br />BO contains unacceptable findings of take exceedance coupled with reinitiation criteria <br />for increased frequency of inundating flows, reduced frequency of 3-day high flows, net <br />-2-
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