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projects. This is already a requirement on all State Aid projects and will leave more data on the pavement section for future street maintenance projects. 4.2 Stormwater Treatment The extension of Ferret Street from the north termini cul-de-sac to Bunker Lake Boulevard results in an impervious area increase of 0.4 acres. Also, the existing storm sewer on 147th Avenue drains to existing ponds east of Armstrong Boulevard and north of Sunwood Drive. They were not designed to receive any runoff west of Armstrong Boulevard. Consequently, stormwater retention and/or treatment improvements will be required with this project to reduce the rate at which runoff leaves the site or infiltrates. 4.3 Water Main Improvements Watermain is proposed to be extended on Ferret Street from Bunker Lake Boulevard to 146th Street. Watermain is also proposed to be extended from mid -block 147th Avenue to Ferret Street. Adding this segment on 147th Avenue will loop together the watermain in this area and provide service for future development. 4.4 Sanitary Sewer Improvements Sanitary Sewer is proposed to be extended on Ferret Street from Bunker Lake Boulevard to 146th Avenue NW. Adding this segment on Ferret Street will provide service for future development. 4.6 Private Utilities Staff has not yet met with the telephone, gas, power and cable utilities regarding this project. During preparation of plans and specifications, Staff will meet with the private utility companies to discuss the proposed improvements as noted in the project schedule within this report. The alignment and footprint of the streets will be considered to minimize impacts to private utilities. Impacts to private utilities area anticipated with this proj ect. Should any utility company indicate they wish to upgrade, replace and/or otherwise modify their services during this project, any such upgrades, replacements and/or modifications will be at the sole discretion and cost of the utility company. 4.7 Traffic Analysis Based upon the potential traffic changes associated with the redevelopment of the West Armstrong Area, more comprehensive traffic analyses are recommended to be completed at the following locations: • Bunker Lake Boulevard/Armstrong Boulevard, • Bunker Lake Boulevard/Ferret Street, and • Armstrong Boulevard/147th Street. Initially, a Bunker Lake Boulevard westbound left turn lane and Ferret Street northbound designated left turn lane and right turn lanes are all warranted. The current land use zoned "COR" allows for flexibility. If the west Armstrong Area evolves to more commercial orientated uses with the addition of the ARAA facility and others, additional analysis is warranted to better understand the impacts. A detailed traffic analysis memorandum is included in Appendix D. Feasibility Report Update West Armstrong Area Street Reconstruction City of Ramsey Project No. 18-02 Page 8