R2020-136 Resolution Authorizing Amendment No. 1 to the Professional Engineering Services Agreement with Northwater Consulting Inc. for the Decatur Watershed Management Plan City Project 2019-38

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10/5/2020 Item Coversheet 3. USDA Regional Conservation Partnership Program(RCPP)Planning and Negotiations—Provide partnership coordination and grant award negotiation consultation. 4. Advancement of Special Projects and Initiatives—Services for water quality improvement items that may or may not qualify for grant leveraging/funding opportunities. 5. Monitoring Program—Begin water quality and sediment monitoring in the Lake Decatur watershed and the lake itself. The agreement with the Illinois State Water Survey is part of this monitoring effort. 6. General Consulting—As needed during the next 12 months. The planning and implementation of a comprehensive plan for a large watershed the size of Lake Decatur's takes a significant amount of time and resources. There are numerous steps that must be completed in order to determine future actions,especially being awarded,or not being awarded,multiple watershed conservation funding grants,and when each grant's funding actually become available. This unpredictability makes it advisable to continue this project in phases with flexible tasks. As Phase 2 is being completed,a detailed Phase 3 scope of services and costs will be established for City Council consideration. The same is planned for Phase 4. It is anticipated that Council will act on Phase 3 around September 2021,and Phase 4 around September 2022. It may be that some phases can be combined as information is gathered and conclusions are drawn. Updated budgets and schedules for all five Phases are on page 8 of the attached Phase 2 Scope of Services. Sediment and Nutrient Monitoring A major component of the Plan,as noted in#5 above,is to monitor and analyze the watershed's water quality to determine if the Plan's activities effectively reduce the amount of sediment and nitrate nitrogen entering Lake Decatur. This will be an ongoing gauge on the effectiveness of the City's watershed efforts. The Illinois State Water Survey(Survey)is one of the State's premier water research institutions. Since at least 1993,the City has had numerous successful Lake Decatur watershed water quality monitoring and analysis projects performed by the Survey. The attached proposal will provide monitoring and analysis at three Lake Decatur watershed locations for one year as part of the Watershed Management Plan. A watershed map and the monitoring locations are on page 3 of the proposal. The Survey will conduct these major tasks: Collect hydrologic and stage/discharge data at the monitoring stations. Collect suspended sediment and nutrient samples at the monitoring stations. Collect turbidity,pH,and temperature at the monitoring stations. Hydrologic,suspended sediment,and nutrient data collected at the monitoring stations will be processed,computed, and compiled. Data will be maintained in a database at the Survey and provided quarterly to the City and Northwater Consulting. Typically the cost of these services would be approximately twice as much as the quoted$30,905. Fortunately,the Survey is already conducting some Lake Decatur watershed water quality work through a grant from the National Science Foundation which allows the Survey to offer their services to the City for this proposal at such a low cost. Since the Survey is a part of the University of Illinois,attached is a copy of the University's Letter of Intent to Establish a Subagreement for the Survey's work. It is anticipated that this will be the beginning of a long term watershed monitoring and analysis program with the Survey. It is also anticipated that the cost of this project will qualify as local cost share match for the soon to be submitted USDA Regional Conservation Partnership Program grant application so that the City's expenditures can be matched dollar for dollar for watershed improvement funds that the grant can provide. Comprehensive Council Review To enable the City Council to examine and evaluate all of the City's water system needs in a more comprehensive manner,early in 2021,City staff and our consulting ferns(Intera,CDM Smith,Northwater)plan to present the findings of the Lake Decatur Watershed Management Plan,the Additional Water Supplies Plan and the Water Utility Long Term Sustainability Plan. This approach will enable the City Council to comprehensively plan for the short,medium and long term needs of our entire water system,beginning in the early months of 2021. PRIOR COUNCIL ACTION: On February 24,2020,the City Council authorized a Professional Engineering Services Agreement with Northwater Consulting Inc.(Northwater)for Lake Decatur Watershed Management Plan,Phase 1. https://decatur.novusagenda.com/AgendaWeb/CoverSheet.aspx?ltemlD=3009 2/3