Loading...
5.i) Staff Report-Stormwater Maintenance Plan Staff Report To: City Council From: Tim Kieffer, Director of Public Works � , J Date: September l7,2013 � Re: Stormwater Maintenance Plan S�j��D� , Agenda Item#: S.i) ', Background; The City Council requested a Stormwater Maintenance Plan be created in ', order to monitor and maintain the City's stormwater infrastructure. Staff ; created a maintenance plan to address these issues and coincide with other � maintenance operations within the City. Staff has begun to perform small ditching project but some jobs are still contracted out because of stafftime ' and equipment restrictions. If Council wants to bring this type of ' maintenance in-house,three people will be required with additional ' equipment. Reshaping ditches will require a minimum of four people to increase maintenance. At a minimum,one person would be in the grader, , one in the skid steer loading trucks, and two people driving truck. Staffis i continuing to locate structures and add them to the City's base map.This plan will also be helpful in creating the City's MS4 Program in the future. At the Council work session on Sept. 10`h,staff was directed to place the , adoption of the plan on the consent agenda � � � Issue: Should the City adapt a Stormwater Maintenance Plan? ; Proposal: The Stormwater Maintenance Plan will include the following: � • Street maintenance including ditch cleaning and street sweeping. • Cleaning of catch basins. • Repair of catch basins and manholes. • Assessing pipe condition(typically by lamping and visual ; inspection). Inspection of storm sewer inlet and outlet structures. 1 . � • Excavation of accumulated sediments from ponds. ; • If/when applicable,inspection and maintenance of structural ' treatment devices,including sump manholes and git chambers. � i i Fiscal Impact: The City budgets around $5,000 for sweeping and $5,0(?0 for culvert and I, ditch work. This plan would require more staff to monitor existing ! infrastructure and more equipment if Council wants staff to perform all I the work. As more culverts and ditches are evaluated,more money will ! be needed for ditching and culvert repairs in order to sustain proper i maintenance. , 1) Approve the Stormwater Management Plan ', Options: 2) Amend and then Approve the Stormwater Management Plan 3) Do not approve the Stormwater Management Plan Recommendation: Option 1 f i i City of Scandia � � � - Stormwater Maintenance Plan C� � �� �• Adopted by the City Council SC��►ND� September 17, 2013 PURPOSE AND INTRODUCTION The City of Scandia approved a Local Water Management Plan (LWMP) in 2012. The LWMP serves as a comprehensive planning document to guide the City in conserving, protecting, and managing its surface water resources. This Maintenance Plan has been created to address ongoing stormwater facility inventory and maintenance issues and is intended to compliment the LWMP. This plan is also intended to be consistent with the goals and policies of the Metropolitan Council's Water Resources Management Policy Plan, and the watershed management organizations having jurisdiction within the City: Carnelian-Marine St. Croix Watershed District (CMSCWD), Comfort-Lake Forest Lake Watershed District(CLFLWD), and Rice Creek Watershed District (RCWD). This plan may be periodically amended by the Public Works Department to remain current with local practices and policies. OFFICIAL CONTROLS Codes and ordinances (official controls) are necessary tools supporting implementation of any successful stormwater management plan. As part of the Local Water Management Plan, the appropriate city codes were reviewed for consistency with local watershed plans. Over time, the codes may need to be updated to remain consistent with goals, policies, and practices of the City. The City's development regulations may also need to be revised from time to time to meet the City's objectives. STORMWATER SYSTEM OPERATION AND MAINTENANCE Scandia's stormwater system represents a major investment for the City. The City Public Works Department has initiated a system inventory process using GPS technology. It is expected that the City will continue to pursue the system inventory over time. The City will work cooperatively with the watershed districts to share system inventory information. The ongoing inspection and maintenance of this existing stormwater management system is critical to protecting the City's stormwater system investment. Table 1 provides the City's stormwater system inspection and maintenance schedule. The City's stormwater system maintenance responsibilities include the following: • Street maintenance including ditch cleaning and street sweeping. • Cleaning of catch basins. • Repair of catch basins and manholes. • Assessing pipe condition (typically by lamping and visual inspection). • Inspection of storm sewer inlet and outlet structures. • Excavation of accumulated sediments from ponds. • If/when applicable, inspection and maintenance of structural treatment devices, including sump manholes and grit chambers. Table 1 —Stormwater System Inspection and Maintenance Schedule - � Catch basins Inspected every 6 years, cleaned as needed. Trunk storm sewer Inspected on a scheduled rotation, cleaned as needed. Stormwater ponds Inspected every 6 years, cleaned as needed. Stormwater pond inlets/outlets Inspected every 6 years, cleaned as needed. Structural treatment devices, including sump City presently has none of these devices. If any manholes and grit chambers are ever installed,they will be inspected annually and cleaned as needed. Street sweeping Sweep streets with curb and catch basins twice a year. SYSTEM IMPROVEMENT PROJECTS AND ACTIVITIES Based on the assessment of the City's current stormwater management practices, the LWMP, and priorities set by the watershed districts, a priority list of system improvement projects and activities could be identified. The system improvements identified could range from those being driven by regulatory requirements, to others driven more by the functionality of the City's stormwater management system goals. � POTENTIAL FUNDING Implementation of the proposed programs and improvements identified as part of the LWMP and the Stormwater Maintenance Plan will affect city finances. Currently, stormwater system maintenance is funded by the City's general fund. However, with the rising cost of system maintenance and new regulatory responsibilities, the City may want to evaluate other options to provide a consistent, dedicated funding source to specifically address the cost of surFace stormwater management. To quantify this effect, a review of the ability of the City to fund these activities should be completed. Below is a listing of various sources of revenue that the City could consider other than the general fund. • Stormwater utility or Franchise Fees. • Grant and partnership monies possibly secured from various agencies for projects. • Project funds could be obtained from watershed district levies as provided for in Minnesota Statutes Chapter 103D.905 for those projects being completed by or in cooperation with districts. • Special assessments for local improvements performed under authority of Minnesota Statutes Chapter 429. • Revenue generated by Watershed Management Special Tax Districts provided for under Minnesota Statutes Chapter 473.882. REVIEW AND ADOPTION PROCESS Review and adoption of this Stormwater Maintenance Plan should be completed by the Scandia City Council. Periodic updates should be completed by the City staff.