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I I I I I I I I I I I I I I I I I I I Implementation Priorities In implementing the master plan improvements, the following prioritized recommendations are made: 1. 2. 3. openings in existing structures. 1. Acqui re necessary ri ght-of-way and construct the three proposed stormwater detention facilities and associated improvements. Temporary or permanent closures for Raising existing structures. Constructing landscaped levees structures. 4. Relocating or protecting contents of significant value. or sma 11 floodwalls around 2. Install connecting section to Kenneys Run storm sewer downstream of 15th Street. Floodproofing measures need to be planned individually and will vary consider- ably from structure to structure, depending on the special circumstances involved. 3. Construct proposed storm sewer inlets for the West Fork Kenneys Run and the 20th Street tributary. This master plan recommends that the City of Golden continue participating in the National Flood Insurance Program and continue enforcing floodplain regula- tions utilizing the most current floodplain information available. In addi- tion, private property owners within designated flood hazard areas, or in other areas which have experienced past flood-related damage, should be encouraged to purchase flood insurance. 4. Construct new storm sewer for the East Fork Kenneys run beginning at the junction box at 20th Street and progressing upstream. 5. Construct grass-lined channel upstream of the East Fork storm sewer inlet. 6. Construct channel improvements and replace the 23rd and 24th Street crossings of the West Fork Kenneys Run. Channel improvements should progress in an upstream manner. Possibilities exist for the implementation of a basin-wide flood warning system. With the construction of the Welch Ditch Detention Basin and the two detenti on facil it i es on the East Fork Kenneys Run causi ng up to a 30-mi nute delay in the 100-year flood peak, stage measuring equipment could be installed to permit downstream areas to be warned of impending flooding. A well-planned monitoring program, combined with area-wide efforts to warn residents of possible severe thunderstorms and heavy rainfall would be effective and beneficial. Neighborhood evacuation and emergency access plans would also be beneficial for periods during and following major flooding. It should be recognized that Tucker Gulch and Kenneys Run are both classified as flash- flood streams leaving little time for flood warning. An effective flood warni ng system shoul d not be re 1 i ed upon for impl ement i ng fl ood-proofi ng or flood protection measures requiring human intervention. 7. Acquire land and construct stilling area and debris basin at the mouth of Tucker Gulch. 8. Construct major channel improvements to Tucker Gulch beginning at the confluence with Clear Creek and progressing upstream. The above-prioriti zed improvements represent the major capital expenditure portion of this master plan for the City of Golden. Other recommended improvements, such as improved inlets to the existing storm sewer, providing maintenance access to existing improved drainageways, and install ing grade stabilization structures may be included with other capitol improvement programs. For the State Highway #93 crossing of Cressmans Gulch, which is cons i dered a Jefferson County cost, it is recommended that improvements be VI-6