2020-04-13-minutes-public-works-study-session

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PROJECT NARRATIVE 1. Project Description: Describe the scope of work. Indicate the major work involved, including a brief comoarison of existina and or000sed conditions. This project will construct an 8 -inch gravity sewer main, grinder pump station, 1,5 -inch sewer force main and a fl- inch force main to provide sanitary service to businesses south of Railroad Avenue and to support future develop- ment. The lift station will be constructed at the south end of the project and pump wastewater north in the 1.5 -inch force main to Railroad Avenue, into the City's existing sewer system. The 4 -inch force main will not be active at the conclusion of construction; it would be installed to encourage future commercial / industrial development on unde- veloped lands south of the project area. The City applied for and received a COG grant in 2016 to support design and construction of sewer improvements in the project area. Through completing designs, it was learned that addi- tional funds are needed for construction. Construction dewatering will be more extensive than what was originally budgeted for due to the high groundwater table in the area. Native soils will be saturated and not suitable for backfill so greater quantities of bank run gravel for trench backfill will be needed than was originally planned for. It was also learned that a cultural resources survey will be needed, adding additional costs to the project. 2. Explain the specific infrastructure Issues the project addresses and how they are linked to economic development improvements. Some existing businesses in the project area must store their waste in holding tanks and then have it pumped into trucks for transport to the City wastewater treatment plant. This process is costly and inconvenient. Some businesses have expressed concerns to the City regarding the costs and hassle of having to deal with sewage storage and disposal, and this project will help ensure these businesses remain committed to staying in the community. Existing business provide approximately 40 jobs in the area. Establishing a sanitary sewer system in the area will also promote the development of other businesses along Main Street south of Railroad Avenue, Including the planned industrial area. This area is regionally important due to the lack of industrial zoned land available in the County. 3. Preliminary Engineering Phase: Estimated Start Date: Jan. 2020 Estimated End Date: Apr. 2020 Please explain phase status (work already completed, in progress, awaiting funding, etc., and factors that may slow phase progress). Preliminary construction plans, specifications and a cost estimate have been prepared for the project, using 2016 COG funds and City funds. The improvements shown along Main Street on the current plans extend to approxi- mately 850 feet south of the intersection of Railroad Avenue.The City recently completed a Wastewater Collection System Planning report. The report determined that long term development of the industrial area will require sub- stantial infrastructure improvement to adequately build out the entire area, which would otherwise delay the com- pletion of this project to serve existing businesses. The intent of the project is to provide immediate sanitary sewer services to existing users, and to encourage future development in the immediate vicinity and in areas to the south towards the interstate. 4. Right of Way Phase: Estimated Start Date: Jan. 2020 Is It Required? Yes X No Estimated End Date: Apr. 2020 Please explain phase status (work already completed, in progress, awaiting funding, etc., and factors that may slow phase progress). This phase will be completed in tandem with the engineering phase so that construction will not be delayed due to right-of-way project requirements. Based on design work that has already been com- pleted, it`s anticipated that temporary construction easements will be needed to construct sewer services and pump station improvements.