WSPC12472

• File Number: 8230.400.20.B.5
• Description: CO River Litigation - State-Div 4 Water Court - Gunnison RICD - Water Court Filing - Expert Reports
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 5/17/2003
• Author: Gary Lacy - PE
• Title: Report for the Gunnison River Whitewater Park - Gary Lacy-PE - Incomplete Copy - Gunnison RICD File I of III - 05-17-03
• Water Supply Pro - Doc Type: Report/Study

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Another structure featured in the Gunnison Whilewater Park is the Offset Double
Deflector (ODD). The ODD i~ designed to COlUill1CI and direct the flow. Figure S shows a top
\'iew ofa typical ODD:

FigureS. Top .ojm of offset double defleetor

The OffSCI double deflector is made frornmnilarmalerials arni eOlUiln1ction methods as
the V-structure. The structure is conslnil:ted from interlocked rock and is grouted if needed A
tockbase is sunk iIlto the riverbed bclowthe scour level for support and erosion pl"Olection.
The OnD is 1)'Pically temlccd to provide similar flow control properties to the V-structure.
The deflcclon are sel apart suc:hthal the fim levcl oftcrracc bounds the low f1ow-.hanneJ.
Subsequent levels of the ODD bound higher flow channels in a similar manner to the U.
struClUre withoutsiSnificanlly reducing the capacity of the rivcrbcd, An elevated fi'onl view of
the ODD, which iUu.o;trnle$ the design, is shown in Fisure 6:

Il

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