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HomeMy WebLinkAboutSW PROSPECT AND I 25 ROADWAY PROJECT - RP180001 - SUBMITTAL DOCUMENTS - ROUND 2 - PROJECT NARRATIVESW Prospect / I-25 Road Project Project Narrative Project Location: The project is located within the East Half of Section 21, Township 7 North, Range 68 West of the 6th P.M. More specifically the project is located on the southwest corner of the intersection of Interstate 25 and E. Prospect Road. The project is located within a 142-acre property currently owned by Colorado State University Research Foundation (CSURF). The project will consist of relocating a portion of the Southwest Frontage Road currently owned and maintained by the Colorado Department of Transportation (CDOT). Project Process: The relocation of the frontage road is proposed as a Road Project (RP) and is accompanied with a Right- of-Way Dedication Application for the Right-of-Way required to encompass the new roadway alignment. While the Right-of-Way dedication will include the width of a proposed ultimate section, the fees have been calculated to include the Right-of-Way required for the interim section plus 4’ shoulders on both sides for a total width of 36 feet with the understanding that additional fees would be assessed at the time the ultimate roadway section is designed. Project Description: The project is proposing an interim roadway section with an asphalt width of 28 feet, which allows for two 12’ travel lanes with a 2’ asphalt shoulder on either side. This interim cross-section is proposed to match the cross-section of the existing frontage road. A drainage swale is designed on the high gradient side that will travel along the roadway and collects at two natural low points on the property, where it is diverted under the roadway to the low gradient side using culverts. The low gradient side will tie into existing grade at a 4:1 slope. The project will also include public infrastructure require for future development within the relocation of the SW Frontage Road, which include public water and wastewater. This Road Project (RP) is proposed to be followed by a Planned Unit Development (PUD) process and a Project Development Plan (PDP) for a portion of the overall PUD area, referred to Phase I hereon. The reason for processing the Road Project prior to the PUD and PDP is to have the realignment of the frontage road constructed prior to the improvements proposed by CDOT to the intersection of E. Prospect Road and Interstate 25. The proposed improvements by CDOT would require a portion of the SW Frontage Road to be relocated to allow for additional width within the CDOT Interstate 25 Corridor and is anticipated to start in early June 2018. The alignment that CDOT is currently proposing does not meet Larimer County Urban Area Street Standards (LCUASS) minimum radii for any street classification. This would require the realigned frontage road to be removed and replaced per LCUASS minimum standards at the time of the PDP for Phase I. To minimize material and efforts, this project is required to be completely constructed and operational in advance of any planning, mobilization, or construction of the proposed CDOT realignment. It is envisioned that initial grubbing and street preparation would occur in late February and extend into March. Due to the amount of fill material, this stage of the project is projected to take the most amount of time. Paving of the bottom lift would quickly follow, with the expectation of completion in April and acceptance in early May. Through the duration of construction, it is proposed that an interim connection will remain at all times to allow emergency access to the weight station. At the locations of each connection, the existing roadway base material will be used as a temporary all-weather surface for access. After final connections are established, the interim access will be blocked by Type III Barricades. The existing frontage road will remain for until approval of Phase I to allow for the recycling of material to be used for the roadway section proposed within Phase I of the overall project. It is proposed that the interim section would remain until Phase I is approved and constructed, at which point, the approved ultimate section would be constructed. Without knowing the exact ultimate section that would be designed and approved, the proposed interim section results in the least amount of reconstruction and redesign. Along with the interim cross- section, an interim pavement section is proposed and would exclude the top lift of asphalt. This would allow for wearing to occur prior to the construction of the ultimate section, at which point, the entire street section would be constructed with the top lift allowing for the entire roadway to look and feel like a new street. Submittal Documents: The documents that will be submitted with the Road Project include the following items • Project Narrative • Roadway Plans • Transportation Development Review Fee Form • Deed of Dedication • Drainage Narrative • Erosion Control Report The project is located within the Boxelder Sanitation District and the ELCO Water District. Plans required for water and sewer improvements will be sent directly to Boxelder and ELCO for their review and approval. We would look to the City to route and coordinate with CDOT for review of this project. With the project only including the relocation of the frontage road, many items required for a Project Development Plan (PDP) are not included for reasons described hereon. A Geotechnical Report has not been provided with Road Project, but a complete pavement design will be required at the time of construction. A Traffic Impact Study has not been provided with the understanding that traffic counts would stay consistent with existing conditions after the completion of the project. The functionality of the roadway would also be improved by the new alignment and larger sweeping curves. With the project being followed closely by a PUD and PDP application, we have not provided and Ecological Study. Through previous meetings with City Staff, it was discussed that there is currently a high-quality wetland located in the middle of the overall site. It is the overall project’s objective for the entire property to make all enhancements and wetland mitigations in that location to enhance the existing wetland and make it a feature for the entire project to enjoy and use. Drainage Narrative: With the close proximity to the Boxelder Drainageway, the additional imperviousness will not adversely affect the existing site, the existing drainageway or any downstream facilities. It is the understanding that the free release of stormwater this close to an established drainageway and this far down the receiving basin will beat the peak of all storm events, and only improve the structural integrity of the drainageway by not contributing to the flows during high flows and damaging velocities. All pollutants generated from the proposed frontage road will be treated through the use of vegetated swales (drainage from the northern portion of the frontage road) or through vegetated buffers (drainage from the southern portion of the frontage road). Please see the drainage report prepared by Northern Engineering for further detail. Maintenance & Repairs: The standard Maintenance and Repair Agreements are proposed to start at the time the interim roadway section is completed. These agreements would restart at the time the final lift of the ultimate section is constructed for Phase 1 of the PDP to follow the project. It is proposed that after the two year Maintenance Agreement period of the interim frontage road section has expired, the City of Fort Collins would take the maintenance of the proposed frontage road, which would include snow clearing at the priority level of a local roadway and repairs required for normal wear and tear, but any structural failure above that will be the responsibility of the property owner.