07-06-2021 WS - Laserfiche WebLink

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Due to the nature of stormwater management, the assessment may transpire over a 12 month period to allow various testing in all seasons. There are no critical failures at this time, thus minimal risk in taking the time. Funding for Storm Water Management: The existing storm water managing fee/assessment has resulted in a fund balance of just over $2 million and is adding just over $220,000 per year. Absent a large dredging bill, there would be adequate existing funds and ongoing revenue to rehabilitate and improve our system. Conversely, if sediment has to be removed and disposed of, an increase in the levy may be warranted. We know of several infrastructure needs; skimmer, Culvert from open ditch to the pre -sediment pond, at Silver View and several small flow control devices that need rehabilitation or replacement. Timing/Strategic Plan: With the final phase of the Municipal Water upgrade in process, near completion of our street reconstruction, and ongoing systematic rehabilitation of the sanitary sewer system, it is now prudent to lay the ground work for a storm water rehabilitation plan. The timing is also consistent with the HOPP program which defines stormwater as one of the three focal points. Finally, as a Green Step city which has demonstrated environmental concern and commitment, storm water management is the foundation of preservation of our precious and highly valuable resource — water. Future Needs: This process has made it apparent that more resources are needed to ensure our system remains functional and ideally, at an optimum level. To accommodate that it has become clear that a second Public Works employee is needed in the Storm Water Division, who would be wholly dedicated to maintenance and Inspections of the entire Storm Water System. Currently, there is a single individual assigned to storm water maintenance. The assessment may reveal an ability to re -direct existing levy from accumulating fiscal assets to maintenance with a goal of reducing or eliminating costly repairs and sediment dredging. It is possible to construct a system using various features and infrastructure that catches sediment that can be removed prior to its introduction into our ponds. Current equipment such as the back hoe and Vactor are sufficient to remove nearly 100% from pre -sediment ponds, a-r4 sumps and grit chambers. Additionally, by becoming the Local Governing Unit (LGU) controlling permitting and inspection we can strictly enforce sediment control on all construction projects which is/can be a potential major contributor to sediment in the storm water system. Current Maintenance: 4 to 6 city wide street sweepings. Vacuum/cleaning of 18 to 24 infiltration basis with sumps Repair of catch basins Cleaning/clearing of intake/infiltration basins Cleaning/clearing of 2 storm scepters (discharging into Spring Lake)