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Colorado Water Conservation Board Members
<br />Mr. Thomas Browning, P.E., CWCB
<br />Review of Lacy Report for Chaffee County Whitewater RICD
<br />May 10, 2005
<br />Page 2 of 9
<br />3. Topographic Mapping of the river bed and banks, through the design reach, and for a significant
<br />distance upstream and downstream, to allow comparative hydraulic design and analysis, and
<br />ascertain whitewater characteristics of the reach. This should include recognition of other
<br />hydraulic and whitewater aspects, including structures, boating features and patterns,
<br />obstructions, and access.
<br />4. Geomorphic and Geotechnical information and analysis for the site and adjoining reaches,
<br />including assessment of stability and recommendations for proposed types of construction.
<br />5. Hydrologic data including examples of daily and diurnal flows, from low flows to flood flows, and
<br />appropriate statistical analysis. This analysis should be correlated to river usage by boating and
<br />user types, skill levels, and numbers, and economic benefit.
<br />6. Mapping of property, buildings, utilities, infrastructure, and other water facilities.
<br />7. Community, boating group, agency, and other party input, considerations, and criteria. Specific
<br />data as to numbers of people, usage, and economic input should be prepared, with objective
<br />analysis by appropriate professionals to provide reliable projections and foresight as to prudent
<br />investment.
<br />Specific Base Analysis Omissions include:
<br />1. Analysis of historic river flows during various boating activities and events, and usage by boating
<br />category and numbers, and related specific economic benefits (e.g. revenue of commercial
<br />boating activities, revenue of other commercial business which river visitors might have used, and
<br />comparison of such income when river flows rise or drop, determination of the flows when such
<br />income levels off), and similar economic specifics associated with special events.
<br />2. River hydraulics analysis for pre - project conditions for flows ranging from lowest flows,
<br />representative historic boating flows, flood flows, and various river operation scenarios.
<br />3. Specific establishment of flood profiles, hazards, instabilities, and flow characteristics and
<br />patterns. Flood and high water impacts to adjacent and other potentially affected properties,
<br />diversions, infrastructures, and utilities should be identified, including a location map tied to the
<br />topography and mapping above. The flood plain should be mapped for a variety of flows including
<br />—1.�o
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