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Snelling Avenue North Street and Utility Improvements | City of Arden Hills 9Project Understanding and Approach The field survey will include the following efforts • Research county information (section, maps, plats, etc.) • Research MnDOT information (such as geodetic monuments) • Submit Gopher State One Call tickets for field markings and maps along all streets, except for the reclaim portions • Prepare/calculate for field staff (property corner search points, survey collector job file, etc.) • Establish project control based on Ramsey County coordinate system, NAD 83 (2011 Adj.) with elevations based on NAVD 88 • Find field locations of existing conditions and utilities• Complete storm structure inventories on existing structures, including rim and invert elevations• Use GIS lines to approximate right- of-way lines • Complete a base map of the project area per RFP requirements An electronic base map will be created and submitted to the city for review prior to initiating design work. TASK 4 DESIGN ANALYSIS Bolton & Menk has carefully reviewed the provided project geotechnical and soil contamination related reports. We have also carefully listened to the testimony received at the public improvement hearing and written correspondence received prior to. Bolton & Menk intends to critically consider design alternatives involving replacement with a trail relative to the key, identified design constraints including state aid/ statutory requirements, RCWD rules, and cost implications of underlying contaminated soils. We intend to deliver a project design consistent with the direction interpreted from city council to city staff; to implement a trail along the corridor if feasible and cost effective. As noted previously in this proposal, we will coordinate with the appropriate agencies up front to complete this design analysis, develop a technical memorandum documenting our professional opinion regarding the design and associated estimated cost, discuss and finalize our recommendations with city staff, and present findings to the Arden Hills City Council at a work session for further discussion. Upon receipt of a desirable direction regarding the trail/shoulder design elements, Bolton & Menk will complete the project design, plans, and specifications. TASK 5 PROJECT PLANS Final design and construction plans will be completed in AutoCAD Civil 3D and developed in coordination with city staff. Plan sheets as listed in the RFP will be included. Major design components will include • Roadway alignment and width • Centerline profiles and typical section; intersection details will not be created • Cross sections at 50-foot intervals, driveways, and critical design locations identified by Bolton & Menk• Location of all existing utilities identified in the field survey or as mapped based on subsequent utility coordination• Proposed storm sewer sizing, location, and structure invert and rim elevation; details for wrapping of trenches and/or pipe will be included for consistency with the Response Action Plan (RAP) • Proposed watermain location, including valve locations and connection points, and notation regarding required removal and replacement of suspected contaminated soil per the RAP• Proposed sanitary sewer size, location, and structure invert and rim elevation• Coordination with public works staff on watermain improvements and replacements, including temporary water service considerations for the dead end portion of the water system which will be impacted • Location of proposed striping; signage changes are not proposed and will not be included—where impacted by improvements, notes to salvage/reinstall sign posts along with their associated signage will be included• Preparation of a Stormwater Pollution Prevention Plan (SWPPP)• Preparation of a construction staging plan and temporary traffic control plan, including a proposed detour to utility CR E and TH 51 for county and MnDOT approval • Preparation of statement of estimated quantities, including street, utilities, and miscellaneous construction items, all consistent with the city’s standard specifications and state aid requirements; MnDOT item designation numbers and measurement/payment requirements will be incorporated Stormwater management and erosion control design will meet RCWD permitting requirements. Upon competition of final plans, we will submit all required information to RCWD for approval. Our scope of services assumes the project will be designed such that the RCWD stormwater management trigger (less than 10,000 square feet of new or reconstructed impervious) is a design constraint. As such, we do not anticipate nor does our scope of services include design of volume control, water quality, and rate control practices. Bolton & Menk will provide plan submittals at 60 and 90 percent for city review prior to submitting the final plans for bidding. Using past bid information from the City of Arden Hills and other nearby metro communities—as well as current contractor pricing, overall city knowledge, local contractors, and site conditions—we will prepare an opinion of probable construction cost. Electronic and hard copies of the opinion of probable cost will be