ACD has been busy stabilizing severely eroded riverbanks along the Rum River to reduce the load of sediment and nutrients entering the river and to enhance the habitat of the Rum. A large initiative utilizing phases of grant funding from the Clean Water Land and Legacy amendment kicked off after a 2017 erosion inventory highlighted just how much need there was along the Rum River. To date, this initiative has garnered significant local investment beyond the competitive state grant dollars from Anoka County, the Upper and Lower Rum River WMOs, the Cities of Anoka and St. Francis, ACD, and numerous property owners. In 2024, we substantially completed construction for Phase 1 of funding from two competitive state grant sources; the Clean Water Fund (CWF), and the Outdoor Heritage Fund (OHF). 

With these funds, along with local match dollars from the all the sources mentioned, we successfully installed the following in 2024:

• 405-feet of articulated concrete toe to normal water levels, with low rock riprap armoring to the two-year flood elevation along some of the highest, steepest, and deepest erosion on the river in Oak Grove (CWF grant funds).
• 115-feet of supplemental rock toe around 40-foot tall bank with toe erosion, susceptible to critical failure in the near future in Oak Grove (OHF grant funds).
• 415-feet of rock toe armoring to a two-year flood elevation with upper banks graded and seeded with native vegetation in Oak Grove, (OHF grant funds). Bank heights ranged from 12-feet to 20-feet with a shear vertical eroded face.
• 400-feet of rock toe armoring to a two-year flood elevation with 225-feet of vegetated reinforced soil slope, and 175-feet of graded upper bank, all of which was seeded to native vegetation in Anoka (OHF grant funds). This bank was approximately 10-feet in height with a paved walking trail actively falling into the river.
• 200-feet of cedar revetment along moderate toe erosion at the Anoka Nature Preserve in Anoka (OHF grant funds). A 550-foot stretch immediately upstream of this segment is planned for a bioengineering project in 2025.

Construction was completed in early November to stabilize one of the highest priority riverbanks in Anoka County. Two separate projects, spanning multiple properties, stabilized 935-feet of some of the tallest and most eroding riverbank on the Rum River. Portions of this stretch ranked at the top of the list of 80+ identified eroding banks during a 2017 erosion inventory of the Rum River through Anoka County. Altogether, these projects are estimated to reduce annual pollutant loading to the Rum River by 753-tons of sediment, and 640-lbs of total phosphorus.  

Construction is complete for a Rum Riverbank stabilization at Dellwood River Park in St. Francis. Erosion of the riverbank was resulting in the loss of numerous trees into the river and was threatening a popular local walking trail. The project design features three primary protection measures.

1. Two severely eroding zones of riverbank were armored with rock riprap, and 14 large tree rootwads were added as in-stream habitat.
2. Three rock bendway weirs were installed, protruding at 45° into the river. These low-lying features, will push flow and erosive scour back toward the middle of the channel, rather than along the outer bank.
3. And finally, the less severely eroding areas of riverbank were armored with cedar trees in a bio-engineering technique called "cedar tree revetments".

In total, this project stabilizes 630 feet of riverbank, enhances 0.75 acres of in-stream and riparian habitat, and reduces annual loading into the river by 60 tons of sediment and 51lbs of phosphorus. The project also incorporates multiple features to enhance fishing opportunities and provide additional in-stream habitat. 

For more information contact Jared Wagner, Water Resource Specialist, This email address is being protected from spambots. You need JavaScript enabled to view it. 

The Anoka Conservation District (ACD) currently has a number of grant opportunities available for addressing shoreline erosion along streams and lakes in Anoka County. If you have noticed your lakeshore migrating backwards over time, or perhaps you once had a low walkable area along your river frontage that is now gone, ACD may be able to help design and even fund a project to protect your property.

The first step is a site visit to your property by ACD staff. Now is a great time to reach out to the district and plan a site visit for the spring. ACD staff will assess erosion problems, provide professional advice, and determine if your shoreline might qualify for financial assistance through one of our various grant programs. Shoreline restorations don't just benefit your property but also help improve water quality in your lake or river and enhances habitat for wildlife. 

For more information contact Jared Wagner,  763.434.2030 x200, This email address is being protected from spambots. You need JavaScript enabled to view it.

In May of 2022, the Rum River reached its highest peak flow since 2001 following torrential rain events in Isanti and Mille Lacs Counties. The roadway to the boat ramp in Rum River Central Regional Park in Anoka County was inundated under feet of water. When the floodwaters receded, 90 linear feet of bank had completely washed out, threatening the roadway and boat ramp, and leaving and exposed eroding bank dumping sediment into the river. This section of washed out riverbank was stabilized using a Flexamat PLUS articulated concrete mat at the toe, and a regraded and native-seeded slope above. A rock barb installed at the downstream end will provide in-channel habitat for fish and invertebrates while also kicking flow out away from the boat ramp.

The Flexamat articulated concrete was chosen for this project because an immediately adjacent project installed in 2015 is still holding very successfully, even after the flooding. An advantage of Flexamat vs. rock is that the Flexamat has void spaces that allow vegetation to grow between the blocks, masking the concrete during low water conditions, and providing additional habitat benefit. Traditional riprap does not allow this vegetation growth, and can look like a rock wall during low water.

In the spring, we will add bare root seedlings of shoreland tree and shrub species to the project site. The native grasses and sedges seeded into the bank will begin to grow, and the whole bank will establish deep-rooted native vegetation which will keep the soil anchored for years to come. A video short of this project can be found on ACD's YouTube page: https://www.youtube.com/shorts/eUHBV5TSNi8. To see other streambank stabilization projects installed throughout Anoka County, please see the virtual project tour on ACD's website. 

Construction is complete on six streambank toe stabilization projects on the Rum and Mississippi Rivers in Anoka. These sites have had significant and accelerating erosion in recent years due to sustained high water and recreational watercraft. Most of the sites lie between two popular boat launches on the rivers.

Cumulatively, over 720 linear feet of eroding riverbank was stabilized. The primary stabilization technique is rock riprap installed on the lower portion of the slope, with a seeded and blanketed vegetative zone above the rock. The primary immediate goal of these projects was to halt the backwards march of the riverbanks by stabilizing the lower portion (or toe). An additional vegetation component is planned for these sites in the following year(s) to help stabilize the upper slope, which is only subject to wave action during the highest water periods. This vegetative zone will be comprised of native woody species, as well as grasses, sedges, and forbs, to enhance the habitat and aesthetic value of the shorelines, while also providing deep root structure to anchor the soil in place above the rock. 

The projects were done via barge from the water, a first for ACD-managed projects. Many of these sites had been on our inventories, but were not cost-effectively constructible from land. With a contractor that can install projects from the water, concerns about equipment access between buildings and site restoration on individual properties are non-factors. Beyond stabilizing these six eroding shorelines, we are hopeful that this new construction technique opens up more potential streambank stabilization projects that would have otherwise not been possible or cost-effective from land. To see these and other streambank stabilization projects installed throughout Anoka County, please see the virtual project tour on ACD's website. 

Construction is beginning on six streambank stabilization projects on the Rum and Mississippi Rivers in Anoka. These sites have had significant and accelerating erosion in recent years due to sustained high water and recreational watercraft. Most of the sites lie between two popular boat launches on the rivers.

Cumulatively, over 720 linear feet of eroding riverbank will be stabilized. The primary stabilization technique will be rock riprap on the lower portion of the slope, with a seeded and blanketed vegetative zone above the rock. This vegetative zone will be comprised of native species of grasses, sedges, and forbs to enhance the habitat and aesthetic value of the shorelines, while also providing deep root structure to anchor the soil in place above the rock. 

The projects will be done via barge from the water, a first for ACD-managed projects. Many of these sites had been on our inventories, but were not cost-effectively constructible in a typical fashion from land. With a contractor that can install the project from the water, concerns about equipment access between buildings and site restoration on individual properties are non-factors. Beyond stabilizing these six eroding shorelines, we are hopeful that this new construction technique opens up more potential streambank stabilization projects that would have otherwise not been possible from land.

Project updates will be provided as construction progresses. To see these and other streambank stabilizations projects already installed throughout Anoka County, please see the virtual project tour on ACD's website. 

A project stabilizing 400 linear feet of severely eroding Rum Riverbank is complete in Oak Grove! Construction was completed in November which included;

• Installation of 850 tons of rock riprap
• Grading the bank to a more stable slope
• Blanketing and seeding with a native seed mix
• Planting native willows and dogwood trees
• Blanketing the soil with straw to protect it until the vegetation grows

The project was funded by an Outdoor Heritage Fund grant through the Lessard Sams Outdoor Heritage Council, as well as match dollars from the landowner and Anoka County. The Outdoor Heritage Fund is one of 4 funds created by the Clean Water, Land and Legacy Amendment. This project will prevent approximately 140 tons of sediment per year from washing into the river, and will enhance wildlife habitat along 400 feet of riverbank that had been a non-traversable eroding face prior.

Stay tuned for more photo updates as the project greens up this coming spring! 

The Brua property located on Rice Creek in Fridley had approximately 85 linear feet of streambank with active erosion. Sediment and nutrients from the eroding bank directly entered Rice Creek. While the erosion severity was classified as moderate, the landowners observed the bank receding over the last several years, particularly during periods of extended high water. By being proactive and addressing the erosion at an early stage, they can minimize the overall cost of the project as well as the sediment and nutrient loading to Rice Creek.

The stabilization solution used a minimal amount of riprap and native plantings to stabilize the eroding face. The shady conditions of the site, frequent water level fluctuation, and flowing water required a hard armoring solution along the bottom portions of the slope. Native species well adapted to frequent water level fluctuations and shady conditions were planted above the riprap to soften its appearance and provide a vegetated buffer with habitat value (see picture to right).

Stabilization of the shoreline will provide reductions in the total suspended solids (2,838 pounds per year reduction) and total phosphorus (1.21 pounds per year reduction) reaching Rice Creek. In addition to the water quality benefits to Rice Creek, downstream waterbodies (Locke Lake and the Mississippi River) will also benefit.

The project was funded through a combination of the Rice Creek Watershed District's Water Quality Grant Program and the landowner. For more information please contact Mitch Haustein, This email address is being protected from spambots. You need JavaScript enabled to view it., 763-434-2030 x150

The riverbank stabilization project in Mississippi River Community Park is underway. Tree clearing, bank reshaping, and riprap installation have been the primary focus at this stage in the construction process.

Future work will include native seeding, erosion control blanket installation, and planting of native shrubs and trees.

The project is funded by a Clean Water Fund grant, a Watershed Based Funding grant, and match from the City of Anoka. Watch for more updates from ACD and the City of Anoka as the project progresses.

Read additional updates on our blog here and here.

UPDATE - October 2021

The riverbank stabilization project in Mississippi River Community Park is nearly complete. Tree clearing, bank reshaping, riprap installation, seeding, and erosion control blanket installation have all been completed. Planting of supplemental bare root shrubs, trees, and dormant live stakes will be completed by the end of November. The project stabilized approximately 1,500 linear feet of severely eroding riverbank.

The riverbank stabilization project in Mississippi River Community Park will begin this month. The current schedule forecasts project completion in early October and includes the general process outlined below.

• Clearing and grubbing – Existing vegetation will be removed within areas that will be regraded to achieve a stable slope.
• Erosion control – Protections will be put in place to prevent exposed soil from leaving the site during construction.
• Excavation and riprap placement – This is the primary step in the stabilization process. The steep slopes will be regraded, and riprap will be placed at the bottom of the slope within the zone of frequent water level fluctuation.
• Planting – The regraded slope above the riprap will be stabilized with native vegetation. Seed mixes, plant plugs, shrubs, and trees will all be planted.

The project is funded by a Clean Water Fund grant, a Watershed Based Funding grant, and match from the City of Anoka. Watch for more updates from ACD and the City of Anoka as the project progresses.