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HomeMy WebLinkAbout6 19440 NW Crossing MaSP Eng Com 3.0 - 11-13-20 MEMORANDUM ------------------------------------------------------------------------------------------------------------ TO: Danielle Garber, Associate Planner FROM: Griffin Nielsen, Engineer II RE: Northwest Crossing Master Site Plan Review No. 19440 DATE: November 13, 2020 ----------------------------------------------------------------------------------------------------------- Engineering Code Requirements: The following code requirements must be included with a master site plan approval. 1. BMC 38.270.070. and BMC 38.400.010. The development is responsible for the local share of Baxter Lane, Cottonwood Road, Laurel Parkway, and Baxter Lane. The local share must be provided prior to final plat. a. With the proposed first phase Cottonwood Road must be completed where adjacent to the development from the intersection to the phase boundary. The section must be completed and accepted by the City prior to final plat approval. b. With the proposed first phase Oak Street must be completed where adjacent to the development from the intersection to the phase boundary. The section must be completed and accepted by the City and the properties prior to final plat approval. 2. BMC 38.410.070. Municipal Water, Sanitary Sewer and Storm Sewer Systems. - The proposed development falls within the wastewater drainage basin for the Norton East Ranch Outfall and Davis Lane Lift station. The outfall and lift station, listed as Capital Improvement Project (CIP) no. WWIF38 and WWIF31, are currently in progress. The proposed projects must be completed and accepted by the City prior to final plat approval, the City does not guarantee the timing of these projects. 3. BMC 38.410.100. Watercourse Setback – Water course setbacks apply to the Baxter Ditch including the defined bed and back along the Baxter Lane. Any alterations to the watercourse will be reviewed with future subdivision applications. If alterations are proposed with a future subdivision written documentation must be provided from all agencies holding jurisdiction of the water course that changes alterations area acceptable prior to plat adequacy. Reducing the water course setbacks by filling within the 100-year flood hazard area extending beyond the 50 foot setback will be reviewed future subdivision applications. Recommended Conditions of Approval: 1. The traffic impact study does not provide a detailed analysis for phased development as such must be updated with each phase of the development. The updates must include verifying traffic counts and incorporating changes to the surrounding transportation system. The updated study will be required prior to preliminary plat adequacy for each phase. 2. The all streets and transportation pathways must meet the City’s design standards. The street layout provided in this application is considered conceptual and will be reviewed for full compliance with the future subdivision applications. 3. Prior to the development of the intersection of Baxter Lane and Laurel Parkway a detailed analysis must be performed to determine the intersection design. As present the traffic impact study notes the need for either a roundabout or signal. 4. Prior to the development of the intersection of Oak Street and Laurel Parkway a detailed analysis must be performed to determine the intersection design. 5. A "1 foot No Access" strip must be placed along the Cottonwood Road frontage of any lot for which the City’s access separation requirement cannot be fully met. This will be listed as a condition of approval for future subdivision. 6. A "1 foot No Access" strip must be placed along the Oak Street frontage for any lot which the City’s access separation requirement cannot be fully met. This will be listed as a condition of approval for future subdivision. 7. A "1 foot No Access" strip must be placed along the Baxter Lane frontage for any lot which the City’s access separation requirement cannot be fully met. This will be listed as a condition of approval for future subdivision. 8. A "1 foot No Access" strip must be placed along the Laurel Parkway frontage for any lot which the City’s access separation requirement cannot be fully met. This will be listed as a condition of approval for future subdivision. 9. The wastewater report must be updated with each phase of the development. The updated report is required prior to preliminary plat adequacy for each phase. 10. The water design report doesn’t provide a detailed analysis for phased development as such the water report must be updated with each phase of the development. The updated report is required prior to preliminary plat adequacy for each phase. 11. The proposed street cross-sections for the internal streets is conceptual. Lane widths and striping patterns will be shown as “preliminary, not approved by the engineering department” and approved with the future subdivision applications. 12. Due to the high groundwater and increased rate of corrosion with in the clay soils all water mains must have additional cathodic protection. A minimum of V-bio polyrap or approved equal is required by the City. 13. The stormwater plan provided with the application is conceptual. A comprehensive drainage plan is required for all development larger than five acres. "Comprehensive drainage plan" means a stormwater management plan that covers all current and anticipated development on a site greater than five acres and sites planned for phased development, including the impact on existing off-site infrastructure. The comprehensive drainage plan must be provided with the future subdivision. a. Low Impact Design (LID) to mitigate stormwater must be used within the REMU zoning district and is encouraged across the entirety of the development. 14. A pedestrian signal warrant analysis must be provided with the first phase of development in order to determine if additional infrastructure is required to support bike and pedestrian connectivity/crossing. 15. Public transit route options and stop locations must be consider when each phase of development. HRDC or the current transit authorities must be contacted allowed to comment with each phase. If a transit stop is identify with or adjacent to the development must be completed prior to final plat approval or with subsequent site plan approval. 16. The sanitary sewer within Rosa Way must be extended to the south side of the section of Oak Street required to be constructed 17. The sanitary sewer must be designed and extended to accept flow from the Laurel Glen lift station. The sewer must be south side of the section of Oak Street required to be constructed. 18. Access must be provided to all sanitary sewer lines and manholes. For mains not located in a street or alley a 12-foot all-weather surface must be provided and maintained by the property owner's association. In addition, all sewer mains must be located a minimum of ten feet from all structures and major landscaping features including trees. All points where mains are proposed within parks must be approved by both the Public Works and Parks Department. 19. The applicant proposes a transfer to City ownership of existing water rights associated with the subject property. The City hereby elects to accept these existing water rights for transfer to City ownership pursuant to Sec. 38.410.130.A.2 BMC. The transfer of ownership of these existing water rights must be in a form and manner suitable for municipal purposes. The applicant and City shall, prior to final plat approval, enter into an agreement containing mutually acceptable terms and provisions for the water rights ownership transfer. 38.410.130 BMC must be satisfied prior to final plat approval. 20. Easements must be provided for the tile drain system or any alternative dewatering system to ensure long-term access and maintenance. The easements must include language restricting the construction of structures over the tile drain or alternative system. Where the system crosses public right-of-way a utility occupancy permit must be obtained from the City. Advisory Comments: 21. The commercial development partially presenting in the master site plan application has not been reviewed. Due to the significance of the a above comments and the require changes to the master site plan and the subsequence required subdivision and site plan review required for the development the engineering department cannot provide a complete review. 22. The applicant must submit plans and specifications for water and sewer main extensions, streets, and storm water improvements, prepared and signed by a professional engineer (PE) registered in the State of Montana, which must be provided to and approved by the City Engineer. Water and sewer plans must also be approved by the Montana Department of Environmental Quality. The applicant must also provide professional engineering services for construction inspection, post-construction certification, and preparation of mylar record drawings. Construction shall not be initiated on the public infrastructure improvements until the plans and specifications have been approved and a preconstruction conference has been conducted. Building permits will not be issued prior to City acceptance of the site infrastructure improvements unless all provisions set forth in Section 38.270.030.C of the Bozeman Municipal Code are met to allow for concurrent construction. 23. The Montana Department of Fish, Wildlife & Parks, SCS, Montana Department of Environmental Quality and Army Corps of Engineer's shall be contacted regarding the proposed project and any required permits (i.e., 310, 404, Turbidity exemption, etc.) shall be obtained prior to future plat approval.