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Q/{{{/U{COtiOI1 for the Colorado Water Conservation Board review committee, Following the presentation. meeting, and preparation of final revisions, the draft report, checklist and meeting notes will be reviewed by the project manager for final editing and delivery to the CWCB, Technical Reviews The CWCB standard written notification that a review of each floodplain study has been initi- ated will be sent to the affected community 45 days prior to a board meeting, The format for this will be the same as previous CWCB notifi- cations, These notifications should not be con- sidered retractable. Thus, either the review needs to be completed before the notification, or sufficient review needs to be conducted. prior to sending the notifications. to assure that the re- view will be finalized before the board meeting. The history of floodplain information will be acquired through contacting any of several ap- propriate sources; including CWCB staff: Mi- chael Baker Corporation; the FEMA Flood Map Distribution Center; the community floodplain administrator; CDOT; National Oceanic and Atmospheric Administration (NOAA); USGS; USACE; consulting engineering firms; and local or regional government maintenance, planning, and/or engineering departments, The type of information gathered could include; adjacent basin floodplain studies. historical flood infor- mation. changes in land use, recent hydraulic designs, upcoming construction or development in the area, and copies of relevant studies or re- ports, The technical review portion will include using the comprehensive "Rules and Regulations for the Designation and Approval of Floodplains and of Storm or Floodwater Runoff Channels in Colorado" as a checklist. Other tools for vali- dating the studies, as needed by the complexity of the floodplain study, can include FEMA's checklists, County or Regional (Urban Drainage Flood Control District) criteria manuals, FEMA's CHECK2 program, and Parsons ES's In-] 7R9.doc _i___ ~---- own checklist for its hydrologic and hydraulic studies. If not already computed from CWeB's Rc- gional Regre"sion Equations, the 100'year peak discharge will be computed and used as a com- parison to the discharge in the floodplain study, Other methocs such as Techniques for Estimat- ing Regional Flood Characteristics of Small Ru' ral Watersheds in the Plains Region of Eastern Colorado (WRIR 87-4094), Estimation of Natu- ral Stream!low Characteristics in Western Colo- rado (WRIR 85-4086), or Streamt!ow Charac- teristics Rel.lted to Channel Geometry of Streams in Western United States (WSP 2193) may also be 1I sed for comparison as appropriate, Comparison rf 110w rates from similar adjoining watersheds al:;o can bc reviewed. Any technical questions identified by the primary reviewer will be noted on original cop- ies of the inbrmatlOn received, and then sum- marized in our report. Technical questions will be noted, eSf'ecially when problems appear to exist that wOlld cause a finding of significant discrepancy, Parsons 10.'; will prepare a floodplain infor- mation report and a memo to CWCB staff sum- marizing the pertinent information about the re- VIew. AVt\lLABIL.lTY OF FIRM AND PROJECT TEAM Parsons FS hydraulic engineers currently have nine projects that are varying in percent complete from 20 to 85 percent. One additional project is about to start, Because no single engI- neer can work full time 011 the CWCB project. we have formulated a strategy to use a team of engineers to assure availabIlity of hydraulic en- gineers to conduct tile CWeR reviews and meet the desired time sch",dule. At least t1rce experienced hydrologic and hydraulic engineers will be available part-time to pelform the expected four to six floodplain ---..-...-- -- -1 2-5 ~PARSONS