BOARD00120 ‎(2)‎

• Board Meeting Date: 1/24/2007
• Description: ISF Section - 2007 Instream Flow New Appropriation Recommendations in Water Divisions 2,3,4, and 6
• Board Meetings - Doc Type: Memo

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TECHNICAL INVESTIGATIONS

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The executive summary reports of technioal data, contained in the lnstream Flow Recommendation
Notebook, form the basis for the staffs recommendations.

Natural Environment Studies

The Bureau of Land Management (BLM) has conducted field surveys of the natural environment
resources on these streams and have found natural environments that can be preserved. To quantify
the resources and to evaluate instream flow and natural lake level requirements, the CWCB and the
BLM have collected biologic and hydraulic data that were analyzed by the Board staff. Based on the
results of these analyses, the CWCB staff prepared recommendations of the amount of water
necessary to preserve the natural environment to a reasonable degree for each of the streams listed
on the attached Tabulations of lnstream Flow and Natural Lake Level Recommendations.

Water Availability Studies

The CWCB staff has conducted an evaluation of water availability for the streams listed. To
determine the amount of water physically available for the Board's appropriations, the staff analyzed
available USGS gage records, available streamflow models, and/or utilized appropriate standard
methods to develop a hydro graph of mean or median monthly flows for each stream flow
recommendation. Staff also relied upon the flow measurements made as part of the field survey as
an indicator of the amount of water physically available in each stream; analyzed the water rights .
tabulation for each stream; and consulted with the Division Engineer's Office to identify any
potential water availability problems. Based upon its analyses, Staff has determined that water is
available for appropriation on each stream and lake to preserve the natural environment to a
reasonable degree without limiting or foreclosing the exercise of valid water rights.

STAFF RECOMMENDATION

For each stream listed on the attached Tabulations of Instream Flow and Natural Lake Level
Recommendations, the staff recommends that the Board declare its intent to appropriate in
accordance with Instream Flow Rule S.d as follows:

S.d Board's Intent to Appropriate. Notice of the Board's potential action to declare its intent to
appropriate shall be given in the January Board meeting agenda and the Board will take public
comment regarding its intent to appropriate at the January meeting.

(I) After reviewing Staffs ISF recommendations for proposed ISF appropriations, the Board
may declare its intent to appropriate specific ISF water rights. At that time, the Board shall
direct the Staff to publicly notice the Board's declaration of its intent to appropriate.

(2) After the Board declares it's intent to appropriate, notice shall be published in a mailing to
the ISF Subscription Mailing Lists for the relevant water divisions and shall include:

(a)

A Description of the appropriation (e.g. stream reach, lake location, amounts,
etc.);

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Fluud Protection. Water Project Planning and Financing. Stream and Lake Protection
Water Supply Protection. Conservation Planning