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I I I I I I I I I I I: I I I I I I I I considered more than adequate for flood plain zoning purposes. One of the primary uses of the preliminary plan will be in the property acquisition process outlined in the drawings. The approximate location of the areas suggested for acquisition are delineated on the drawings but exact title and legal infor- mation is, by intent, not portrayed on the maps. The accuracy of available information on utilities cannot be relied upon for final design. We have strived to locate all major facilities which would affect improvements along the gulch. Prior to implementation of final design and construc- tion, it is imperative that the exact locations of the criti- cal facilities be defined very accurately by field measures, including the Denver Water Board conduits. Complete final construction plans and specifications must be prepared on any portion of the gulch prior to construction Of the proposed facilities. Construction plans should deal with structural design of all facilities, detailed grading plans, treatment of individual utilities and a myriad of other points which are handled in a cursory manner in this report. Although the master plan as prepared will be of great benefit to the designer of final channel improvements and the manager of all flood plain improvements, it by no means solves all the prob- lems of construction and total flood control. B. DRAWINGS The following general description of improvements proposed is organized to coincide with individual design sheets included in Appendix B. Information contained herein is intended to be descriptive and generally supplemental to that information portrayed on the master planning sheets. Drawing No. SG-l The existing 48" reinforced concrete pipe which presently drains Slaughterhouse Gulch to the South Platte River should be supplemented with a new reinforced concrete box following the alignment shown on the drawing. The existing conduit, which drains to a 66" reinforced con- crete pipe and eventually a 10' x 10' concrete box under Santa Fe Drive has been severely cut in capacity due to many bends, constrictions and utilities which pass through the conduit. The existing pipe should be left in pla.ce and used for local drainage along its alignment. The proposed box culvert would vary in size from 6' x 12' at the entrance to 3' x 24' at the outlet at the South Platte River. The change in size is a result of various utility conflicts along the proposed alignment. The design capacity of the concrete box structure should be VI II - 2