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Prepared by: Bolton & Menk, Inc. ESTIMATED COSTS 2024 PMP Street & Utility Improvements ǀ 0T1.130168 Page 9 A Level 1 wetland delineation was conducted during the summer of 2023 to identify the wetlands surrounding the proposed pond dredging operations. Permitting associated with the wetland impacts will be submitted to the appropriate agencies for approval at the conclusion of final design and is expected to meet the conditions for a no low permit associated with the Wetland Conservation Act (WCA) requirements. No additional permitting is required for the dewatering of the ponds associated with the pond dredging work. Existing, adjacent wetlands and potential associated permitting needs were identified through the feasibility study. After meeting with the 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 complete the work. It is recommended the project’s final design scope be modified to complete the necessary delineations to move forward with the proposed backyard storm sewer improvement work, as proposed in this report. Delineations and necessary permits will be secured during final design. A preliminary list of anticipated permits for construction of the improvements beyond those identified above include the Minnesota Pollution Control Agency (NPDES Construction Stormwater Permit) and the Minnesota Department of Health (Public Watermain Plan Review). The RCWD reached out after our meeting to inform project staff that the proposed project improvements may be eligible for upcoming grant funding. The grant funding is an annual program put on by the RCWD to help with implementation of stormwater management projects in the RCWD. The funding is intended for projects that provide stormwater quality treatment, runoff volume reductions, peak runoff rate control and/or reductions in groundwater usage. Projects proposed in conjunction with municipal street projects, such as this one, are encouraged. Applications for the 2024 Stormwater Management Grant are expected to open around the end of September and be due around mid-December. The application to the RCWD and grant administration should be considered for addition to delivery of this project. VII. ESTIMATED COSTS Detailed estimates of probable construction costs have been prepared for the improvements described in this Report and are included in Appendix B. All costs are based on anticipated unit prices for the 2024 construction season based on actual bid prices for similar projects. Actual costs will be determined through competitive bids following the final design for the project. All estimated costs also include a 10% contingency and 27% overhead allowance for legal, engineering, administrative, and finance costs. Table 2 contains a summary of the estimated total project costs. for all recommended improvements, inclusive of construction costs, contingency, and overhead allowance. Table 2 – Estimated Total Project Costs Proposed Improvements Reclamation Areas Mill & Overlay Areas Trails & Ponds Total Project Costs Streets $973,600 $497,500 - $1,471,100 Storm Sewer $358,100 $477,200 - $835,300 Sanitary Sewer $120,200 $47,100 - $167,300 Watermain $202,500 $17,100 - $219,600 Trails & Ponds - - $307,800 $307,800 Total Project Costs $1,654,400 $1,038,900 $307,800 $3,001,100