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Rebuttal Statements of Upper Yamps Conservancy District (no exhibits), Morrison Creek Metropolitan District
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Rebuttal Statements of Upper Yamps Conservancy District (no exhibits), Morrison Creek Metropolitan District
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Last modified
1/26/2010 4:42:06 PM
Creation date
8/11/2009 10:41:56 AM
Metadata
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Template:
Water Supply Protection
File Number
8230.21A2
Description
CWCB Hearing: Objectors' Prehearing Statements
State
CO
Basin
Yampa/White
Water Division
6
Author
Margaret O'Donnell, Robert G. Weiss, John Redmond, Mike Newmann, Jason Yanowitz, Chester Thorton
Title
Rebuttal Statements of Upper Yamps Conservancy District (no exhibits), Morrison Creek Metropolitan District
Water Supply Pro - Doc Type
Court Documents
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MAY-19-04 14:24 FROM-WEISS AND VAN SCOYK 970 879 6058 T-286 P.027/033 F-562 <br />7. a 12eport for City vf Siearrcboar Spri,zgs 13oacing Pczrk preparcd Uy Gary Lacy, <br />P.E. for porzak Browning & Bushong '[.,LP dated January 2004; <br />8. a letter datcd 20 January 2004 from Gary B. Tllompson, P.E. to Glenn E. <br />Porcalc, Esq., Porzalc Browning & Buslion? LLP; and <br />9. an application for surface water rights, Case Number: 03CW86. <br />10. MemorandtLm from Tom Browning, CWC'B Flood protzction Program dated <br />Apri126, 2004 submitted to Susan Schneider, Colorado Attomey General's <br />Office. <br />11. A letter rc:part from McLaushlin ?.2incon dated Apri127, 2004 submitted to Tzd <br />Kowalski, Colorado Water Conservation Board. <br />Review Comments <br />As requested Uy lV7'r. McLaubhlin, tlie focus a£ this review centered on the <br />hydraulic analysis conducted to date for the referenced project. While mtlclz of the <br />documentation provided presented insight and background of the issue of in stream water <br />rights and appropriate recreatioils use, the expertise ancl field of practice of the reviewers <br />is in che field of hydraulics, river meclianics ancl geomorphology. <br />The first area of eoncern centers on Mr. Lacy's January 2004 repon entitled <br />"Repore for City of Steamboat Springs Boating Parlc". While the rcview reveled no <br />empirical data to quantify tlie llydraulic effects of the constructed boat chutes, Enuation <br />1, located on page 11, was presented as a means to quantif.y the water deptli upstream of <br />each structure. While geizeralized forms of weir equations, for both sharp crested and <br />braad crested weirs, can be used with relativEly high confidence, application of these <br />types of equations must be made within the bounds of the goveming assumptions used to <br />simplify them. <br />Typical idealized assumptions include absence of centripetal forces on sections <br />bounding the approacli zones of acceleration, absence of increased turbulence and non- <br />uniform flow conditions, aeratian of the nappe under the impinging jet and a uniform <br />velocity distribution across the sill of the weir, Sased on observations made during tlie <br />field visit, each of these assLLrnplions appears to Ue violated in the current design. It is <br />therefore reeommended that a mueh more thorough examination of the hydra«lic contr.ol <br />provided by the boat chules Ue conducted, <br />Page 12 of Mr. Lacy's repon states: <br />"At exzreme floods Chls srrucEure will itoi significcintly affect the <br />100 year floodplain_ It is my opinion that the Park is capabde of dlverting, <br />capturing, and controlling water witltin clze river charinel at maximaim jlow <br />rcttes up to 1900 cfs. 'lhese scnictzires divert, capraire and control these <br />flows eff ciently and wllhout waste. 1'1 is aLso my opinton that these <br />straectzeres do nor ajfect the 100 year flooclplcciri. These streeCtur-es were <br />designed at grnde ro rriimic the natural shape oJthe streambed und they do <br />1)
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