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WS – Item #2 WORK SESSION STAFF REPORT Work Session Item No. 2 Date: September 8, 2015 To: City Council From: Michael Grochala Re: NE Lino Drainage Study Background The NE Area Drainage Study models the drainage for 1400 acres of land on the east and west sides of I 35E, and north of Main Street. The study evaluates a new surface water outlet to Peltier Lake. Implementation of the plan will require the approval of the Rice Creek Waterhsed District (RCWD). City staff submitted the draft NE Area Comprehensive Surface Water Management Plan (CSMP) to the RCWD in June of 2015 for review and comment. Since the last City Council update on July 6, staff and WSB representatives met with RCWD staff and engineers to review comments. The primary concern of the district is mitigation of any potential downstream impacts created by the new stormwater pipe outlet. The City’s plan provides options to mitigate the potential for these impacts in the form of temporary upstream storage during a 100 year rainfall event. The RCWD has requested additional information as part of the approval process. These requests have been incorporated into a proposal from WSB & Associates to complete a feasibility study for the project. The purpose of the feasibility study is to: • Confirm modeling results and parameters. • Examine design alternatives and develop a preferred alternative. • Prepare preliminary and cost estimates. • Develop and recommend proposed pipe alignments. • Identify effected property owners and stakeholders. • Identify all necessary permits. • Identify potential funding options. WSB & Associates have proposed to complete the study for a not to exceed amount of $69,076. Funding for the study will be provided by the City’s Surface Water Management Fund. This fund was established in 1992 to pay for stormwater management planning and trunk improvements. Fees are collected from property at the time of development.