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SECTION VI SUMMARY OF PHASE A STUDY PRELIMINARY MEETINGS A~D DATA GATHERING Preliminary meetings were held with all groups concerned in the master planning contract for Sanderson and weir Gulches, Th8 meetings provided direction and coordination for the progression of the study. Separate meetings were held with Denver, Lakewood and Jefferson County. In Denver, coordination for the project came through the offices of the Wastewater Control Division. All preliminary meetings, however, provided input from engineering, planning, management, parks and recreation and traffic offices. Meetings held with the City of Lakewood, which were handled through the Department of Community Services, also reflected input from engineering, pl..nning, ?<lrks and recct'ation and leg<l1. Jefferson County administrative offices were also kept updated on the pro- grcssion of the study. 3. Field survey information on the three gulches which included topography and channel cross-sect~on com~leted by the City of Denver for the Corps of EngLneers Ln 1961. 4. Land status along the gulches. 5. Topography and facilities of the Agricultural Ditch and Reservoir Company. 6. State highway plans at gulch crossings. 7. Projected city arterial street plans. 8, City of Denver flood plain maps for Sanderson and Weir Gulches through Denver. 9. Available recorded rainfall and runoff data for the metropolitan area. 10. Subdivision plans Which have or will effect the drainage system operation. The collection of all this information greatly assisted in the progression and completion of the master planning study. Review and progress meetings were held with the District, Denver, Lakewood and Jefferson County. At these meetings, progrcss of the study was reported and contract compliance WaS assured. DEVELOP~1ENT OF ALTERNATIVE PLANS In addition to the conversations and meetings held witi'. the involved entities, many other organizations were contacted. These included: With the preliminary hydrologic inv;sti9ation completed, w~ich . included a determination of the deSLgn pOLnt flows as outlLned Ln 8eotion III and an analysis of existing facility capacities. rcvised flood plains were devised for the SLK storm frequencies under study, Knowlcdge provided by the flood plains incluO~d .., __,~ ~~~ ~n~~h n+ '~"~d~~.n~ fnr each ~tor~ frA~UAn~y. ~..' ...~ ~ ~..'" --.. ~.. ~+ -....... ~~_....'.. ~ -, 1. Corps of Engineers, Omaha District. 2. Denver Reqional Council of Gover~~nts. 3. Foothills Metropolitan Recreation and Parks District. 4. City and County of Denver Assessors Office. 5. Jefferson County Assessors Office. 6. Agricultural Ditch and Reservoir Company. 7. Colorado State Highway Commission. 8. U. S. Gcologicul Survey. 9. Subdivision Engineers and Planners. Following the procedures outlined in Calculation Methods Used . for Damage Potential Anulysis in Section IV, the dam~ge potent La 1 in dollars was determined for each storm occurrence ~nterval. Alternative plans for eliminating or minimizing the damage potential were next evaluated. The alternatives considercd for possible ~pplication included: The information obtained through contacts and meetings with these organizations in every c~~e had som~ ~ffect nn ~hp st~tus of the gulches. Some of the items of data which were collected include the following: 1. Corps of Engineers flood plain studies for portions of Sanderson, No. Sa~derson and Weir Gulches. 2. Corps of r:ngin€ers flood plain studies for the South Plattc River which reflect the inst~llation of the Chatfield ~nd Mr. Carbon Darns. -67- . .. "'."~~l ."pe 0- ~'.'~.'~g "'~~~ ',p"~ "~'"".,, '".)' ~ ..~~..,~~'" .--..... ~"". Lined or unlined low velocity open channels, Major underground conduits. Channel relocation. High velocity channels. rmoroved or additional detention facilities. Combination of any of the above. 2. 3. ,. 5. 6. ,. -68-