Agenda - Council - 05/25/1993 - Laserfiche WebLink

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Street Improvements Because of its need to handle commercial traffic it is proposed that 143rd Avenue N.W. east of Xkimo Street N.W. be constructed as a standard seven ton design for a residential street with a 30 foot width having surmountable concrete curb and gutter and bituminous pavement. The bituminous pavement shall be a minimum of two inches thick with four inches of Class V base. X~mo Street N.W. between 142nd and 143rd Avenues N.W. shall consist of a 42 foot wide street with surmountable concrete curb and gutter on the eastern residential side and a B-6/12 curb along the west side. The pavement shall be constructed with four inches of bituminous and four inches of Class V base sufficient to maintain a nine-ton road design standard. Also because of the potential for commercial development on the west side of Ykimo Street N.W., it is proposed that a five foot wide concrete sidewalk be placed along the west side of Xkimo Street N.W. from 142nd Avenue N.W. to 143rd Avenue N.W. Xkimo Street N.W. will be improved for a distance of approximately 60 feet beyond the intersection wil.h 143rd Avenue N.W. A total of five street lights will be placed along 143rd Avenue N.W. and Xkimo Street N.W. Following completion of the aforementioned street improvements, the terrace area behind the curb will be spread with a minimum of four inches of black dirt, seeded, fertilized and mulched to establish turf. PROJECT COST A detailed estimate of construction costs are presented in Appendix A. In addition to the construction costs, overhead costs include engineering, construction staking and inspection, legal, administration, interest during construction and contingencies. The overhead costs for the project are estimated based upon percentages of construction cost. Those percentages are estimated to be as follows: Engineering Staking and Inspection Bonding and Legal City Staft Administration Contingencies Interest during construction 5% 7% 3% 5% 8% 2% Table 1 contains a summary of total project costs which have been divided between construction and overhead costs and also categorized between direct costs attributable to project ~)3-10 and those costs which have been attributable to oversizing. An eight inch sanitary sewer and an eight inch watermain are considered lateral size mains. Improvements oversized beyond these lateral sizes are eligible for funding from a sewer and water trunk fund. TABLE I RIVER'S BEND 3RD ADDITION ESTIMATED PROJECT COST Improvemenl; ~ Trunk/MSA Cost Total Project Cost Sanitary Sewer Watermain Storm Sewer Street Improvement Construction Cost Total Overhead @ 30% Total Project Cost I7 390 26 295 31.525 36 063 t 11 273 33.382 144 655 2 390 17,780 4,755 31,050 -0- 31,525 13,116 49,179 18,261 129,534 5,478 38,860 23,739 168,394