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HomeMy WebLinkAboutNarrative Response to Comments 06 29 2021 1091 Stoneridge Drive • Bozeman, Montana • Phone (406) 587-1115 • Fax (406) 587-9768 www.chengineers.com • E-Mail: info@chengineers.com Civil/Structural Engineering and Surveying June 29, 2021 City of Bozeman Planning Department Attn: Danielle Garber 20 E. Olive Street Bozeman, MT 59718 RE: Narrative Response to Development Review Committee Comments – Westland Lofts Condominiums Phase 2 (COB # 18557, C&H #171281). Dear Danielle, This letter is to provide a narrative response to the Development Review Committee Comments provided on December 2, 2020. This narrative is intended to accompany the Phase 2 Site Plan submittal. Responses to these items are provided in italics below: Section 2 – Conditions of Approval: 1. The applicant is advised that unmet code provisions, or code provisions that are not specifically listed as conditions of approval, does not, in any way, create a waiver or other relaxation of the lawful requirements of the Bozeman Municipal Code or state law. This item is noted. 2. The applicant is advised that Phase 2 will exceed the allocated capacity for this property within the Baxter Meadows Lift Station as such Phase 2 cannot receive site plan approval until additional capacity is created downstream as determined by the City’s Engineering Division (i.e. the Norton East Wastewater Interceptor is constructed to take demand from Baxter Meadows Lift Station, The Baxter Meadows Lift Station is upgraded, or an alternative.). The above-noted requirement is understood. Based on previous conversation with the City of Bozeman Engineering department, completion of the Norton East Wastewater Interceptor was anticipated for the end of June, 2021. Though this is an approximate end date, the applicant anticipates that the site plan and building permit review processes will be complete in a similar time frame to the interceptor’s completion. It is understood that final building permit approval cannot be issued until completion of the interceptor project. Civil/Structural Engineering and Surveying Section 3 – Required Code Corrections Encroachments & Landscaping 1. Clarify if there are ground level patios on the east side of Building C. Sliding doors and fencing are shown in the architectural plans, but the landscaping plan shows planting beds in those locations. Partially Addressed. Per Section 38.410.060 - If a project proposes an encroachment into a utility easement it must receive written approval from all the impacted utilities, which means those utilities who currently have infrastructure in the easement or who will be placing infrastructure in that easement for the project in order for the City to approve the encroachment. The patios and fencing for building C require this approval for the file. The patios and fencing are proposed with Building C. Northwestern Energy has indicated that they will not need the rear easement. The communications utility providers have indicated that they will either use the proposed NWE easements or that conduit running along the back of the units would provide sufficient access to the units and would not require disturbance of the fence or patio. The applicant has proposed a typical 12” PVC Utility culvert to provide access. Engineering Comments: 1. A utility occupancy permit, found on the engineering department’s webpage, and approval from the City’s Water Superintendent is required for any private utility occupying a public water or sewer easement. The permit and approval is required for the proposed sanitary sewer services prior to site plan approval. This is noted. A draft of the permit is included with the resubmittal. The portion of the sanitary sewer services installed with the public utility easement and adjacent to the water main were approved with the Phase 1 Site Plan Application and have been installed. 2. DSSP Section II - Drainage Policy: The applicant must include a drainage plan with post- construction storm water management controls that are designed to infiltrate, evapotranspire, and/or capture for reuse the post-construction runoff generated from the first 0.5 inches of rainfall from a 24-hour storm preceded by 48 hours of no measurable precipitation. For projects that cannot meet 100% of the runoff reduction requirement, the remainder of the runoff from the first 0.5 inches of rainfall must be either: a. Treated onsite using post-construction storm water management control(s) expected to remove 80 percent total suspended solids (TSS); b. Managed offsite within the same sub-watershed using post-construction storm water management control(s) that are designed to infiltrate, evapotranspire, and/or capture for reuse; or c. Treated offsite within the same subwatershed using post-construction storm water management control(s) expected to remove 80 percent TSS. a. The applicant must provide pre development vs post development runoff for drainage areas 3 and 4. The weighted C value for area 3 is increased from predevelopment conditions, show how the difference in runoff will be managed. Civil/Structural Engineering and Surveying Drainage Areas 3 and 4 are addressed in the approved Master Site Plan Stormwater Management Report. These areas generate very minimal runoff and are not expected to cause problems on the adjoining properties (Public Parks and Open Space). The proposed hardscapes are not parking areas so they are not expected to generate significant oils or sediments that might pollute surrounding properties. 3. BMC 38.270.030 (C)(1) - Completion of Improvements: Concurrent construction is approved contingent upon written approval from the fire department for concurrent construction. Provide correspondence with fire department prior to site plan approval. The water main was installed during the spring of 2021. The City’s acceptance of the infrastructure and the project close-out information will be provided prior to occupancy permit. 4. BMC 38.410.070 – Municipal water, sanitary sewer and storm sewer systems: Per Condition of Approval No. 3 of the Master Site Plan, Application No. 18557 Phase 2 will exceed the allocated capacity for this property within the Baxter Meadows Lift Station as such Phase 2 cannot receive building permit approval until additional capacity is created downstream as determined by the City’s Engineering Department (e.i: the Norton East Wastewater Interceptor is constructed to take demand from Baxter Meadows Lift Station, the Baxter Meadows Lift Station is upgraded, or an alternative.). The above-noted requirement is understood. Based on previous conversation with the City of Bozeman Engineering department, completion of the Norton East Wastewater Interceptor was anticipated for the end of June, 2021. Though this is an approximate end date, the applicant anticipates that the site plan and building permit review processes will be complete in a similar time frame to the interceptor’s completion. It is understood that final building permit approval cannot be issued until completion of the interceptor project. If you have any questions or need any more information, please give me a call at (406) 587- 1115. Thank You, Drew Kirsch, E.I. Project Manager \\MISSOURI\OFFICEDATA\C&H\19\191222\SITE PLAN - FINAL\RESPONSE TO COB COMMENTS (MSP) 2019.05.28.DOCX