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<br />Chalk Creek - alternative 1 S~,. 014
<br />New QP at sec 32 - 15S - 80W; NF Chalk Creek 100 feet upstream of private inholding
<br />New QP at sec 12 - 51N - 5E; Chalk Creek 100 feet upstream of east section line
<br />New QP at see 30 ~ 15S -79W; Baldwin Creek at County Road 162
<br />
<br />Amount on~ Chalk rrp.p.k' A. new QP was required because original the Chalk Creek
<br />QP was split and moved upstream to help water users, A ~f 1.75 cfs from
<br />October 16 to April 15 and 5,0 cfs from April 16 to October 15 is acceptable and needed
<br />for fish purposes, In addition, the USFS requests a ,Ili.~h flow for 20 days between May I
<br />and July 15 of at least 70% of bankfull and up to 120 % of bankfull (quantified as 57.0
<br />cfs to 97,0 cfs) to transport heavy sediment loads caused by natural erosion, and to
<br />maintain channel capacity, geometry, and aquatic habitat in this alluvial stream, The
<br />Group wanted this definition (limits) of the high flow request and assurance that there
<br />would be some upstream exchange potential particularly during runoff,
<br />
<br />There is n.ll. l!al!:e on the NF Chalk Creek,
<br />
<br />Amount on rh.lk rreek ahovp ~t Flmo' The original QP was split and moved upstream
<br />above St. Elmo to help water users, A q1J.~~J!9VV; of 8,75 cfs from October 16 to April
<br />15, and II. 0 cfs from April 16 to October 15, is recommended for fish purposes, This is
<br />less than the existing CWCB flow of 18 cfs year-round because the QP is far upstream.
<br />In addition, the USFS requests a Ilia" fin", for 20 days between May I and July 15 of at
<br />least 70% of bankfull and up to 120 % of bankfull (quantified as 151.0 cfs to 259,0 cfs)
<br />to transport heavy sediment loads caused by natural erosion, and to maintain channel
<br />capacity, geometry, and aquatic habitat in this alluvial stream, The Group wanted this
<br />definition (limits) of the high flow request and assurance that there would be some
<br />upstream exchange potential particularly during runoff.
<br />
<br />The.llilir on Chalk Creek (period of record 1913 - 1919; drainage area of 48.0 square
<br />miles; elevation at 9,670 feet) indicates that the CWCB flow recommendation of8,75 cfs
<br />from October 16 to April 15 is met 20% of the time in January and February, 90% of the
<br />time in November and April, 100% of the time in October and December and 50% of the
<br />time in March, In addition, the CWCB flow recommendation of 11,0 cfs from April 16
<br />to October 15 is met 80% of the time in April, and 100% ofthe time from May to
<br />October. The low portion of the USFS high flow range (151,0 cfs) is met 20% of the
<br />time in May, 80% of the time in June and 10% of the time in July, The high portion of
<br />the USFS high flow range (259,0 cfs) is met 1% ofthe time in May, 20% of the time in
<br />June and 1% of the time in July,
<br />
<br />Amount on H.lt1",;n rrp.pJf: A new QP is required because the original Chalk Creek QP
<br />was split and moved upstream to help water users, A ___of 2.5 cfs from October
<br />16 to April 15, and 6,5 cfs from April 16 to October 15 is acceptable and needed for fish
<br />purposes,
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<br />There is ~e on Baldwin Creek,
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