10-22-2018 Council Meeting Packet

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Mr. Michael Grochala October 9, 2018 Page 2 G:\Group Data\WATER RESOURCES\Proposals\Lino Lakes\NE Drainage - Phase 1&2 Final Design updated 10182019.docx Topographic survey: • Use topography survey data to develop an existing conditions base map that will include the survey points, line work (as survey figures where applicable), and existing ground surface. • Data pertaining to the City’s storm sewer, sanitary sewer, and water main shall be collected in the field. This data includes rim elevations, invert elevations, pipe sizes, and structure sizes. • Private and other utilities (gas, telephone, electric, cable, etc.) data will be collected with design level locates. Private utility plan review and integration: A Gopher State One Call will be initiated to request field markings and mapping of the existing private utilities within the project area. This information will be reviewed with the field survey data. Soil borings & geotechnical evaluation: Complete a total of eight (8) borings within the Peltier Lake Outlet Channel area: seven (7) borings to a depth of 7-10 feet, and one (1) boring up to 14 ½ feet. Additionally, complete two (2) borings on each side of the I-35E Crossing, each to a depth of 14 ½ feet. Soil boring logs will be provided for each location. Task 2 –Plan Design and Permitting ($97,100) Task 2 includes creating a full set of plans of the proposed improvements. WSB will assist the City in obtaining approvals from governmental authorities having jurisdiction over the project if needed including preparing and submitting of permit application(s) and/or approval requests. The following are tasks to be performed: Project management & meetings: WSB will lead the project design process including communication and coordination efforts to facilitate the design and bidding. WSB will hold two project meetings with the City of Lino Lakes staff: one after the completion of 80% plans to review prior to permit submittals, and one after regulatory agencies have reviewed and comments are incorporated. One additional meeting with the Rice Creek Watershed District and stakeholders to review final plans and permit applications is expected. We will provide the necessary graphics, maps, and presentation materials for these meetings. 80% plan preparation: The 80% plans created in AutoCAD will incorporate the existing conditions survey and background information and detail the removals, alignment, and grade of the outlet channel, outlet structures, culverts, restoration, erosion control, traffic control, and SWPPP documentation. The 80% plans will be used for permit submittals, engineer’s estimate, and determining final wetland impacts. The final wetland impacts will determine how on-site wetland mitigation and permitting is prepared. Permit applications: The proposed level of disturbance will require permitting through the Rice Creek Watershed District and MPCA’s NPDES permit application process. This task includes the necessary stormwater management, plan preparation, permit applications, and coordination with the appropriate governing authorities. Stormwater modeling will be completed to show compliance with the Northeast Lino Lakes Drainage Area Comprehensive Stormwater Management Plan. A proposed conditions model will be created to show that all requirements are met, and the model will be submitted with permit applications. Permitting for wetland impacts through the U.S. Army Corps of Engineers and the Department of Natural Resources will also be required. It is anticipated that many wetland impacts will be mitigated via on-site wetland mitigation. Any remaining mitigation will be through the purchase of credits. On-site mitigation of wetland impacts will include development of a mitigation site plan, Wetland Conservation Act replacement plan approval, and two Technical Evaluation Panel meetings. On-site wetland mitigation requires three to five years of monitoring after construction is completed. Monitoring is not included in this scope and can be provided as a separate scope and fee after final design has been completed.