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Home My WebLink About2025-08-25 Handouts RCWD August 27, 2025 Centerville Project Updates Nick Tomczik, Administrator Matt Kocian, Lake and Stream Manager Tom Schmidt, Drainage and Facilities Manager David Petry,Project Manager Chris Otterness, PE, Houston Engineering, Inc. Overview ¤What is a ǞğƷĻƩƭŷĻķ? ¤Peltier and Centerville Lake Water Quality ¤Public Drainage Systems ¤Clearwater Creek Stabilization Project Watershed Districts \[ƚĭğƌͲ ƭƦĻĭźğƌΏƦǒƩƦƚƭĻ ǒƓźƷƭ ƚŅ ŭƚǝĻƩƓƒĻƓƷ ƷŷğƷ ǞƚƩƉ Ʒƚ ƭƚƌǝĻ ğƓķ ƦƩĻǝĻƓƷ ǞğƷĻƩΏƩĻƌğƷĻķ ƦƩƚĬƌĻƒƭ͵ ŷĻ ĬƚǒƓķğƩźĻƭ ƚŅ ǞğƷĻƩƭŷĻķ ķźƭƷƩźĭƷƭ ŅƚƌƌƚǞ ƷŷƚƭĻ ƚŅ ğ ƓğƷǒƩğƌ ǞğƷĻƩƭŷĻķ ğƓķ źƓĭƌǒķĻƭ ƷŷĻ ƌğƓķ ǞŷĻƩĻ ğƌƌ ǞğƷĻƩ ŅƌƚǞƭ Ʒƚ ƚƓĻ ĭƚƒƒƚƓ ǞğƷĻƩ ĬƚķǤ͵ Water knows no political boundaries. Coordination across multiple jurisdictions is critical to manage water resources such as Rice Creek. 185 square miles of urban, suburban, and rural lands Anoka, Hennepin, Ramsey, and Washington Counties 28 communities w/5͸ƭ aźƭƭźƚƓ ƚ ƒğƓğŭĻͲ ƦƩƚƷĻĭƷͲ ε źƒƦƩƚǝĻ ƷŷĻ ǞğƷĻƩ ƩĻƭƚǒƩĭĻƭ ƚŅ ƷŷĻ 5źƭƷƩźĭƷ ƷŷƩƚǒŭŷ Ņƌƚƚķ ĭƚƓƷƩƚƌ ε ǞğƷĻƩ ƨǒğƌźƷǤ ƦƩƚƆĻĭƷƭ ε ƦƩƚŭƩğƒƭ͵ RCWD was established in 1972 when county boards petitioned the MN Board of Water and Soil Resources. Political boundaries and funding issues limited city and county efforts to manage drainage issues, flood control activities, and water quality concerns. Peltier and Centerville Lake Water Quality and Centerville Lake Alum Project Matt Kocian Rice Creek Watershed District Peltier and Centerville Lake Water Quality Meet the lakes: Peltier and Centerville Lake Water Quality The Problem: Too much algae! Driven by too much phosphorus. Peltier and Centerville Lake Water Quality CentervilleWater Quality Update Where does phosphorus come from?: Internal recycling External (watershed) sources Centerville Water Quality Update Past watershed projects have helped to control external phosphorus e.g. shoreline restoration and LaMotte pond / ballfield water reuse Centerville Lake Internal Load Study (2019) Internal phosphorus recycling is a problem in Centerville Centerville Lake Alum Project Centerville Lake Alum Project, 1998 ¤How do we mitigate internal phosphorus loading? ¤Most common tool: Aluminum Sulfate (ÐAlumÑ) ¤Recently used (successfully) in Bald Eagle Lake Bald Eagle Lake Alum Project, 2016 What is Alum? ¤Used to control sediment phosphorus release (internal phosphorus loading) ¤Aluminum Sulfate (liquid) ¤Permanently binds phosphorus in the sediments ¤Aluminum phosphate complexation (Al(OH)PO) 34 ¤!ƌǒƒ ͻƌƚĭƉƭΏǒƦͼ ƦŷƚƭƦŷƚƩǒƭͲ ƉĻĻƦźƓŭ źƷ ŅƩƚƒ ğƌŭğĻ The Centerville Lake Alum Project: Photos from May 2024 Centerville Lake Alum Project Key Project Details: ¤Alum carries VERY low environmental risk ¤No swimming or fishing restrictions ¤No permit needed from DNR/MPCA ¤Estimated longevity: 15 years ¤Water will be noticeably clearer soon after application ¤Clear water means more plants ÎthatÓs good! Centerville Lake Alum Project Clear water = more aquatic plants Native aquatic plants are necessary for a healthy lake! Centerville Lake Alum Project Alum financial summary: ¤Clean Water Fund grant$954,500 (86%) ¤Project Partners: ¤Rice Creek Watershed District $50,000 (5%) ¤Anoka County$35,000 (3%) ¤City of Centerville $35,000 (3%) ¤City of Lino Lakes$35,000 (3%) Total$1,109,500 Public Drainage Systems Tom Schmidt dt ΑΑΑDrainage & Facilities Manager ACD #55 tile outlet in Centerville Public Drainage Basics ¤What is Public Drainage? Drainage systems established by petition to a Drainage authority (historically a county Board) (CD), or District court (JD), multiple counties. The drainage system was paid for and is owned by the property owners it serves. ¤RCWD, in its capacity as Drainage Authority, is the custodian and administrator of the drainage system. It does not own the ditch or the associated right-of-way, but does exercise a property interest in those lands on behalf of the other benefited parties that utilize the ditch. Public Drainage Basics ¤ Originally designed for Agricultural Drainage, to allow the land to be used for Haying and Pasture, not intended to convert a wetland into dry upland. ¤Most drainage systems in the district now serve as regional stormwater conveyance systems (stormwater outlets). Carrying peak flow beyond the original design, leading to more rapid degradation. Types of Public Drainage Systems in RCWD Traditional Systems ¤Open Ditch ¤Agricultural Drain Tile Drainage Characteristics of the RCWD ¤22 Public Drainage Systems ¤Flat topography ¤114 miles of Public ditch ¤High water table ¤Rapidly urbanizing areas ¤Urban and rural components Public Drainage In Centerville Anoka County Ditch #55 (ACD#55) and Anoka Washington Judicial Ditch #3 (AWJD#3). The last major repair of AWJD#3 through Centerville was in 1959. (ACD#55 IN 2015). Anoka County Ditch #47 (ACD #47) has been abandoned and is now under private management. Example of a Repair project Before Ramsey Count Ditch #4 in Roseville. Example of completed Repair project Ramsey Count Ditch #4 in Roseville. Clearwater Creek (AWJD #3) ¤Hugo, Lino Lakes, Centerville ¤Outlets to Peltier Lake o Impaired for excess nutrients ¤Heavily scoured and sloughing banks o Increased sediment and nutrients downstream Between 21st Ave and 20th Ave Clearwater Creek Project Area Straightened Channel near the school Clearwater Creek (AWJD #3) Stabilization Feasibility Study (2023-2024) GOALS Sediment plume into Peltier Lake ¤Stabilize creek banks and reduce the instream erosion ¤Reduce channel velocities, establish deep rooted vegetation ¤Reduce nutrient and sediment delivery to Peltier Lake ¤Assess a variety of potential solutions to achieve these goals Clearwater Creek (AWJD #3) Stabilization Feasibility Study (2023-2024) RESULTS ¤PRELIMINARY Design ¤2-Stage Ditch o I-35E to 20th Ave ¤Ditch Repair o 20th Ave to Main St ¤Re-meander o Main St to natural stream I-35E to 20th Ave Two-Stage Ditch 20th Ave to Main St Ditch Repair Main St to natural stream Re-meander Clearwater Creek (AWJD #3) Stabilization TIMELINE and FUNDING ¤2023-2024 Feasibility o$75,000 ¤2025-2026 Final Design and Permitting o$121,000 ¤?? Construction o$1.1M -$1.9M Clean Water Fund -Watershed Based Implementation Fund Board of Water and Soil Resources Clearwater Creek (AWJD #3) Stabilization NEXT STEPS ¤Collaboration with Centerville and Lino Lakes City staff o Identify specific properties, landowners, and existing easements ¤Landowner engagement though town hall meeting ¤Final design and permitting Thank you! Questions? Nick Tomczik, Administrator Matt Kocian, Lake and Stream Manager Tom Schmidt, Drainage and Facilities Manager David Petry,Project Manager Chris Otterness, PE, Houston Engineering, Inc. ¤Extra slides ¤9Ë?϶¤ŗňđŹ ¤MS 103B ¤Water planning and projects ¤MS 103D ¤Watershed Districts ¤MS 103E ¤Drainage ¤Chapter 8420 ¤Wetland Conservation Act Junction manhole on ACD #55 Near Water Mark Peltier Centerville Backflow Feasibility Study Project Results Summary: On average, backflow phosphorus loading from Peltier to Centerville is very low Common Carp Population Assessment (2022) 54 kg/ha 2022 Estimate Peltier and Centerville Lake Water Quality Shallow Lakes ~16ft deep max. Peltier and Centerville Lake Watershedske Watersheds Watershed : Lake Area RatioWWWWWWW Peltier 140:1 Centerville0.9:1 Average Phosphorus Concentrations Peltier 150-200 ug/L Centerville75 ug/L Centerville Lake Internal Load Study (2019 & 2023) Study Results: Most phosphorus in Centerville Lake comes from lake sediments AKA ÐInternal loadingÑ, or recycling Centerville Lake TMDL (2013) and Backflow Loading Assessment (2022) RCWD is examining cost-effective options for limiting backflow Peltier and Centerville Lake Water Quality