05-04-2020 Council Work Session Packet

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Ms. Katie Larsen 4/13/2020 Page 7 Nadeau Acres Engineering Review 1. Boulevard trees should be shown within the city right-of-way. Updated 2. Move plantings off of proposed storm sewer and riprap areas. Noted. 3. Coniferous trees shall be 10-ft from trail edges. Deciduous trees shall be 15-ft from trail edges. Noted. Trees near trail extension to Birch Street do not meet the requirements listed above. • Floodplain There are no existing floodplains on Nadeau Acres. • Drainage and Utility Easements Drainage and utility easements are proposed within the site where there is proposed storm sewer, backyard swales, and stormwater management facilities. There is an existing 66-ft wide powerline easement that runs from northeast to southwest through the middle of the site, and an existing 85-ft wide powerline easement that runs along the western edge of the site. The applicant is dedicating a 60-ft right-of-way along 20th Avenue (CSAH 54) and an 80-ft right-of-way along Birch Street (CSAH 34). Comments: 1. Storm sewer between lots 108 and 109 is greater than 10-ft deep, therefore, the easement shall be twice as wide as the depth. Easement revised to 30-feet. Storm sewer is approximately 14.5 feet deep. 2. 10’ Turf Maintenance Access to be installed over all storm sewer utility proposed between lots. Include between lots 155 and 154, 150 and 149, 121 and 122, and 109 and 108, Added. Lot numbers changed, Turf Maintenance Access added. 3. Drainage and Utility Easements shall not be within powerline easements unless there is documentation from the powerline company to use this space as an easement. Easements revised. Prior to final plat approval, the applicant needs to submit documentation that the power company will grant drainage and utility easements. 4. Temporary grading easements on adjacent properties may be required (see Grading section for more details). Retaining walls removed from right-of -way and stub streets/temporary dead-ends pulled back to allow for grading on-site. 5. Provide documentation of grading and utility agreement within the NSP powerline easements (85-ft wide easement and 66-ft wide easement). In Process. – Permit Application submitted 02-24-2020 6. Grading for the outlet for Pond 100 is on adjacent private property (26-31-22-12-0006) and will require a drainage and utility easement approval from the property owner and NSP. Noted. will be coordinated with property owner. Plans will be adjusted accordingly if easement cannot be obtained. Plans have been adjusted. 7. Sheet 6 showing the ghost plat is missing from the plan set dated 3/20/2020. • Development Agreement A Development Agreement will be required with the final plat. Noted. • Grading Agreement A Grading Agreement is not applicable at this time. • Stormwater Maintenance Agreement The stormwater maintenance for public facilities will be covered under the City’s Programmatic Stormwater Management Agreement.