Agenda - Council - 03/09/2021 - Laserfiche WebLink

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Mr. Bruce Westby March 2, 2021 Page 2 EXHIBIT A On the west end of the project, we propose to extend a 16" water main to the west side of Armstrong Boulevard (CSAH 83). This raw water main extension will put in place infrastructure to allow for easy connections of future City wells to serve the new water treatment plant. The available right-of-way outside of the roadway is limited in this area and may require easement acquisition or impacts to the roadway. Existing water main, storm sewer and other utilities located in the north and south boulevards along Bunker Lake Boulevard NW will need to be designed around or relocated for the water main construction. It is crucial to have accurate locations and mapping of the existing water main and utility locations. At the intersection of Ramsey Boulevard (CSAH 56) and Bunker Lake Boulevard NW (CSAH 116) existing electric transformer boxes, traffic signal control cabinets, hydrants and other utilities will need to be designed around or relocated for the water main construction. In addition, the existing right-of-way narrows east of the intersection narrowing the boulevard area from the existing back of curb to the right-of-way. On the east end of the project near Cottonwood park, preliminary investigation of the National Wetland Index (NWI) revealed the presence of wetlands in close proximity to the proposed water main alignment. It is anticipated the impacts will be minor but due diligence is required through wetland delineation to establish boundaries in the field. This full design must incorporate AWWA standards, CEAM design standards and City of Ramsey standards. PROJECT APPROACH Task 1: Data Collection & Preliminary Design Topographic Survey & Soil Borings A survey will be performed in the project area to establish a base map file for understanding the existing conditions in the field. This work will be performed following an approved alignment for the proposed water main to gather topographic data along the proposed route. The schedule is dependent upon accurate surveys as soon as reduced snow cover permits. A good foundation is key to every successful project. Ron Farmer will lead the team in obtaining the needed geotechnical information for the project. He will develop site stratigraphy and soil parameters, evaluate fill areas and soil corrections, evaluate utility bedding, and prepare the geotechnical report. Ron and his team will also assist in plan and specification creation and cost estimation. SEH will contract directly with a geotechnical testing firm for obtaining soil borings on the project. We have included an allowance of $28,500 for hiring a subcontractor to perform the soil borings. Given the many unknown variables involved with the presence of existing utilities in the boulevard area along the anticipated water main alignment, the drilling may need to occur in the roadway during off-peak traffic hours. Sufficient geotechnical investigation is crucial to the design elements of trenchless installation and the structural support of the proposed infrastructure. Utility Coordination A design can only be as good as the information that you have to work off. With that in mind, Justin Bergerson and his team will coordinate with Gopher State One Call for locating of existing utilities and coordinate with the surveyors to locate all marked locations with a topographic survey of the proposed project area. The team will also use their expertise to lay out the right-of-way boundary and adjacent properties for the project area. This information will be essential for creating an accurate base map file and Digital Terrain Model. Early identification of potential conflicts or utility improvement needs and ongoing coordination with the public and private utility companies are key components for a smooth -running project. The SEH team proposes to meet with the utility companies at the start of the project (after the topographic survey and existing water main locating performed by the City of Ramsey but prior to preliminary design). This is proposed for two purposes: to inform the utilities of the proposed project and to gather the most accurate information from them about the existing utilities, and to verify all utilities captured by our topographic survey. We also propose to hold a second meeting once the final layout has been chosen to discuss any conflicts and coordinate potential