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I I I I I I I I I I I I I I I I I I I (jONTRO< OQ 0" O~~ "'" , ':II ~ lID (; ~ ; ~ ~ ,,~ <o~ l\r/V~a 1'1'<1 Board of Direclors Executive Commi1tee: N Cathy Reynolds 0 ~ Chairman 0 City of Denver 0 < W. G. Duncan It 0 Chairman Pro.Tem ~ Douglas: County 0 0 Ruth A. Correll ri Secretary w > City 01 Boulder z w 0 Steven E. Cramer Adams County Arlen E. Patton w ::l Engineer z w > Members: < I ~ Fred Allen w N City 01 Westminster ~ Bonnie Allison 0 ~ City of Edgewaler . N Marjorie E. Clement Jefferson County David A. Day .. w Engineer ~ T. J. Hackworth w ~ City of Denver :; Josie Heath ., Boulder County William H. McNichols ~ ~ City 01 Denver N ~ Eugene l. O1is .;, City of Englewood '" . Charles Pitts w z Arapahoe County 0 M. L "Sam" Sandos I .. City 01 Denver w ~ w ~ Major Drainageway Planning for Upper Slaughterhouse Gulch L. Scott Tucker. Executive Director SELECTED PHASE B PLAN (October 1982) Treasurer Octoher 18, 1982 GENERAL \0;~1.. :\ \~ ~~ The Phase B report and preliminary design shall be based on the selected plan that includes the following: 1. Recommendation in the plan to enforce the 100-year floodplain regulation. 2. A discussion that clearly points out the need for regulating a residual 100-year floodplain that may remain after the plan is implemented. Also point out that the existing 100-year floodplain has to be regulated until it is modified by physical changes to the existing Slaughterhouse Gulch William P. Ruzzo Water Resources Consultants, Inc. 2765 South Colorado Blvd., Suite 218 Denver, Colorado 80222 Subject: Upper Slaughterhouse Gulch Dear Bi 11: This letter will serve as a notice to proceed with Phase B of the "Major Drainageway Planning for Upper Slaughterhouse Gulc~", In accordance with the terms of Agreeme~t No. ~1-8:2, your f1~ has 90 calendar days from this date to subm1t to D1str1ct for reV1ew and comment a draft Phase B report. This places the submittal of the draft in the vicinity of January 14, 1983. drainageway facilities. Planning for, or anticipating such changes does not justify regulating anything other than the floodplain defined using Accompanying this letter is a "Sele~ted Phase B ~lan" ,dated, October, 1982. It will serve as the baS1S for your d1rect1on dur1ng the Phase B portion of this project. 1 am scheduling a progress meeting for October 26, 1982 at 9:00 a.m. at your offices. I trust the time and, date are acceptable and by a copy of this letter I am asking all proJect sponsors to have a representative at ~his,me:ting. Although the selected alternate is clear, the meet1ng 1S 1ntended to make sure we are all thinking along the same lines. If the time or date are , unacceptable, please advise me and I will reschedule the meet1ng. Congratulations on a job well done during Phase A. We are all pleased with the Phase A report and look forward to the completion of the final Phase B, Master Plan, report, existing channel conditions. 3. Encouragement to purchase flood insurance. 4. A provision for an adequate maintenance access to all drainageway reaches. Any separate maintenance trail should have a minimum flat surface width of 10 feet. 5. A provision for adequate erosion control for all channel improvements and structures. Sincerely, 6. Recommend that new development in the watershed provide on-site erosion ~~.~. -J control during construction to limit the amount of silt and earth washed Ben Urbonas Chief, Master Planning into the drainageway during frequently occurring runoff events. BRU/clg Enclosures ccl Charles Blosten/Bob Deeds Wi 11 i am McCa 11 7. Caution that improvements to Upper Slaughterhouse be prioritized to complete the downstream facilities first and then proceed upstream to each successive reach.