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HomeMy WebLinkAboutELEMENTARY SCHOOL 1990 - SPECIAL SITE PLAN REVIEW - 14-88A - CORRESPONDENCE - STREET RELATED DOCUMENTDevelopmV Services -40 Office of the Director Ii NjOW ft�A City of Fort Collins DATE: March 7, 1989 TO: Steve Burkett, City Manager THRU: James K. Davis, Director of Development Services FROM: Mark Sears, Civil Engineer III -Aplalt6j,a� RE: Taft Hill and Horsetooth Intersection - Preliminary Design Report Please review and approve the attached report. The project will construct the Taft Hill Road and Horsetooth Road Intersection to arterial street standards and coordinate with Transportation's traffic signal project for this intersection. Also the half mile section of Taft Hill Road will be built adjacent to the Rossborough Subdivision as a part of this project, and paid for by Tri-Trend Inc. Staff is not certain as to the policy for landscaping medians. We are planning to cover the medians with red exposed aggregate and not landscape them as recommended by the Parks and Recreation maintenance staff. If will cost an additional $15,000 to landscape the three medians which can be landscaped. The project is scheduled to be constructed from late May through August of 1989. However, the traffic signal installation will be delayed until spring 1990. The signal is a part of a large Federal Aid Urban Systems (FAUS) project to construct or upgrade 17 signals. The FADS project will not be approved by the State Division of Highways for construction until later this year. It will then take 4-5 months to order and receive the signal equipment. The preliminary cost estimate indicate that the project can be built within the current budget. Street oversizing Funds will be used to finance the north leg of the intersection. The Oversizing Fund Budget had anticipated reimbursing the Rossbourgh Subdivision developers for the oversized portion of the north leg in 1988. The Oversizing Fund will fund both the oversized portion and the developer's portion for the first 700' of the north leg on the west side. When the adjacent land on the west develops, Street Oversizing will be reimbursed by the developers for their residential share. Tri-Trend Inc. will pay for their portion of Taft Hill along the Rossborough Subdivision. Repay agreements will also be used for future development reimbursements along all four legs of the intersection. Staff recommends that the plans be finalized and the project be bid as presented in this design report. 300 LaPorte Avenue • P.O. Box 580 • Fart Collins, CO 803222-0380 • (303) 221-6601 Developmeniverx,ices • Engineering Department City of Fort Collins TO: James M. Davis, Director of Development Services THRU: Gary Diede, Director of Engineering FROM: Mark E. Sears, Civil Engineer III 6^a-� DATE: March 7, 1989 PtR'ECT TITLE: TAFT HILL RDAD AND HORSEa=-a ROAD INTERSECTION PRWECT NUMBER: 305-2823000 e*• 1B SJ Pll I _4 0 1 L'I To construct the Taft Hill Road and Horsetooth Road Intersection to arterial street standards and coordinate with Transportation's traffic signal project for this intersection. SCOPE OF WOF1K The project includes the construction of all four legs of the intersection to arterial street standards. The arterial street standard is a 70' wide street with curb, gutter and sidewalks, four travel lanes, a left turn lane and bicycle lanes. The pavement for the intersection will be concrete with 300' concrete approaches on the deceleration lanes and 150' concrete pads on the acceleration lanes. Figure 1, shows the extent of construction proposed for the intersection. Tri-Trend Inc. the owners of Rossborough subdivision have agreed that it is appropriate to build the east half of Taft Hill adjacent to their subdivision as a part of this project. They will be responsible for paying the developers share of an arterial street for their half mile section. we tried to work with the School District, so Horsetooth Road west of our project could be built 36' wide to provide access to their proposed new school. But, to date an agreement has not been reached, primarii-v due to the dispute between the City and the School District over the payment of street oversizing fees and reimbursement for street oversizing expenses. 300 LaPorte Avenue • P.O. Box 580 • Fort Collins, CO 80522-0580 • (303) 221-6605 Taft Hill/liorsetooth Inter•tion • Mlrch„7, 1989 Page 2 The intersection design requires that an extensive storm drainage system be constructed. The storm sewer, as shown in Figure 2, was designed to meet urrnediate and future needs. The pipes can be extended with future street improvements. The storm sewer will outfall into the existing Rossbourgh Subdivision drainage channel, which was designed to carry the runoff from this drainage basin. The street right of ways will be seeded with non -irrigated native grasses. Trees will be planted in the landscaped areas as designated in Figure 1, and will be irrigated with a bubbler irrigation system. The medians will be covered with red exposed aggregate concrete and not landscaped as recommended by Parks and Recreation maintenance staff. It would cost an additional $15,000 to landscape the medians. The intersection was designed to meet traffic needs for the next 20 years, as projected by the Horsetooth West Master Plan Site Access Study which was prepared by Matthew Delich for Scavo Realty. The intersection was designed to arterial street standards in accordance with the City of Fort Collins Design Criteria and Standards for Streets, and the Storm Drainage Design Criteria and Construction Standards. The arterial standard provides four travel lanes (two in each direction) , a left turn lane, bicycle lanes, and 7' attached or 5' detached sidewalks. Based upon the traffic study, right turn lanes will not be needed within the 20 year projection. The storm sewer was designed to handle the "2 Year Storm." The streets were designed to handle the run-off and prevent flooding during a "100 Year Storm." The pavement was designed by Aguirre Engineers, Inc., according to the Colorado Division of Highways pavement design method. For specific information refer to the "Pavement Thickness Design Report." Figure 3, shows the additional R.O.W. to be acquired and the R.O.W. already ac uired. The additional R.O.W. to be obtained will be dedicated by the owners of the property on the northwest corner of the intersection. The Master Street Plan requires this intersection to be improved to arterial street standards. By improving the intersection, the traffic carrying capacity of Taft Hill Road and Horsetooth Road will be increased significantly. The present traffic conditions warrant the traffic signal which, along with the intersection improvements, will improve safety and reduce the congestion at the intersection. Engineering is providing the project management, design, drafting, surveying, inspection, and construction management for the project. Aguirre Engineers, Inc. was hired to provide the soils testing, ground water investigation, and pavement design. They will also preform the soils and materials testing during construction. REM Technical Consultants was hired to assist with the storm sewer design. They determined the amount of run-off from each type of storm and helped size the storm sewer system.