2020.05.04 CC Packet - Laserfiche WebLink

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Ms. Rachel Juba April 28, 2020 Page 2 The site grading has been completed in 2019 for the remainder of the Oneka Place development. Minor grading modifications will be required based on slight lot line adjustments made as part of the 41" Addition. The western limits of Empress Avenue North will be required to be pulled back approximately 35-ft to the east to be consistent with the previously approved grading plan. Additional detailed review of potential impacts to Lot 1 Block 1 B and Lot 1 Block 213 will take place prior to approval of construction plans to ensure driveway access is fully understood/acceptable and to plan for how Empress Avenue North will be extended in the future. Stormwater Management 8. The applicant has submitted their Storm Water Management Plan for the site, meeting the appropriate storage, rate control, treatment, and volume reduction. The applicant is utilizing water reuse as a means to irrigate the development and meet a portion of the stormwater management requirements. It is anticipated 4-5 million gallons of groundwater will be conserved annually throughout the entire Oneka Place Development by use of stormwater reuse. The trunk water fee has been reduced by 35% due to the use of water reuse which is consistent with the initial phase of this development. 9. The stormwater reuse system will be located with lot -line drainage and utility easements, road right of way, and outlots. The system will be owned and operated by the Homeowners Association, and the City will have access to the system as needed for monitoring and operation. The applicant is meeting approximately 50% of the volume reduction requirement by utilizing water reuse. The remaining volume control requirement is met through the dead pool storage provided in the NURP ponds. 10. A water balance analysis has been submitted as part of the stormwater submittal identifying adequate water supply with the stormwater basins to sustain water reuse. 11. A detailed groundwater analysis has been submitted to identify the elevation of groundwater. The findings have been used to identify minimum floor elevations that provide required separation from groundwater. Development Agreement 12. There are a number of development fees outlined within the City's Fee Schedule that will become due as part of the final plat. The Development Fees are included within Exhibit C of the Development Agreement. 13. A credit to the trunk area charge based on the anticipated reduction in water demand by using stormwater reuse has been included as part of the Development Agreement. Thank you for the opportunity to provide comments on this project. Additional comments may be necessary following the review of the responses to these. If you have any questions, please do not hesitate to contact me at 651-286-8463. Sincerely, WSB Mark Erichson, PE City Engineer cc: Len Pratt, Pratt Homes (email only) John Bender, Westwood Professional Services (email only)