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QBOLTON & MENK Real People. Real Solutions. August 14, 2023 David Swearingen, PE Public Works Director/City Engineer City of Arden Hills 1245 W Highway 96 Arden Hills, MN 55112 Attachment AAvenue llet 7-1649 5533-16�4 Ph: (9521890-0509 Fax: (952) 890-8065 Bolton-Menk.com RE: Engineering for 2024 PMP Street & Utility Improvements Project Amendment 1 - Additional Project Scope Dear David: Through the public outreach process and subsequent development of the feasibility study for the City of Arden Hills' 2024 PMP Street & Utility Improvements Project, potential additions to the scope of the project were identified for City Council consideration. If this additional scope is directed by Council to move forward, additional design and plan production efforts will be necessary. Below is a list of the proposed changes to the project scope since the original contract was approved: Additional trail and retaining wall needs were identified in areas adjacent to the intended project area during the feasibility study process. These needs should be considered for addition to the delivery of this project. The proposed trail improvements would include removal of the existing bituminous pavement and repaving the trails with new bituminous on the existing aggregate base materials. Additionally, the trails would have new concrete pedestrian ramps installed where the trails proposed for rehabilitation intersect roadways in the project area. Beyond the pedestrian ramps, the trails would be replaced, in kind, matching the existing trail alignments, widths, and elevations. Due to the existing site topography, some segments of these existing trails appear to be quite steep and may not be feasible to improve to strict compliance with Americans with Disabilities Act (ADA) requirements beyond the new concrete pedestrian ramps, consistent with the existing trail system along these recreational trails. The modular block retaining wall along the south side of the trail, approximately behind 1479 Colleen Avenue, would also be replaced and improved as part of the potential trail improvements. Existing, adjacent wetlands and potential associated additional permitting needs were identified during the feasibility study associated with the storm sewer outfall improvements. After meeting with the Rice Creek Watershed District (RCWD) and identifying the proposed scope of work at the storm sewer outfalls as it relates to RCWD's rules and regulations, it was determined that Level 2 wetland delineations and associated impacts permitting will be required to construct these improvements. Modifications to the project's final design scope should be considered for addition to the delivery of this project in order to complete the necessary delineations and move forward with the proposed backyard storm sewer improvement work, as proposed in the feasibility report. During the feasibility study process, the RCWD reached out to city staff to inform them that some of the proposed project stormwater quality improvements may be eligible for upcoming grant funding. The grant funding is an annual program put on by the RCWD to help with H:\ARDH\0T1130168\0_2024 PMP Street & Utility Improvements\&_Project Management\2_Contracts\Amendments\Amendment 1\130168_2024 PMP Street & Utility Improvements Amendment 1_20230814.docx Bolton & Menk is an equal opportunity employer.