One activity that ACD does every year is take local high school students to streams near their schools to collect macroinvertebrates. Many of these organisms are the larval forms of many of our common insects. Think mosquitoes, mayflies, black flies, and dragon flies. Assessing the community of invertebrates living in a stream over time can give us a good indication of how healthy that stream is (i.e. how good the water quality is). This is because the different types of these invertebrates have varying levels of tolerance to polluted water. Some can only live in very clean water, while others can survive in very polluted water.

This exciting lesson combines a field trip to a stream and the opportunity to play in the water, with a lesson about the natural world and how we can use the biotic organisms living in those streams to monitor their health over time. In the midst of the COVID-19 pandemic, we had to think outside of the box to make this fun and important lesson happen in 2020. In the spring of 2020, we were not able to do this lesson with any schools, because all of them were full time distance learning, and we had never prepared a distance learning lesson before. This fall however, we got a little more creative.

I made a virtual lesson via Go Pro video with a teacher from the Forest Lake Area Learning Center and his sons. With Totino Grace and St. Francis High School students, we worked in small groups in the field with masks on, disinfecting all equipment between classes. We also had classes attend virtually while a teacher held the live feed camera up and talked to the students that were attending online. Overall, whether by recording, live video stream, or in person at the river respecting social distancing and mask wearing, just about 200 kids still got to take part in this activity from the three schools mentioned. It took a little more time and effort than usual, but in the end we made sure a large number of local students still got the opportunity to take part. 

ACD installed approximately 650 linear feet of cedar tree revetment at Rum River Central Regional Park this past month. This type of project prevents erosion of shorter river banks using cut eastern red cedar trees anchored along the toe of the bank in a shingled fashion. The thick branches of the eastern red cedars dissipate the erosive energy of the water as it washes along the streambank on the outside bend of a river. In this particular area at the park, a walking trail was at risk of washing out soon if the erosive scour continued unchecked. In addition to protecting the walking trail, this project will keep about 30 tons of sediment out of the river every year!

In order to accomplish this feat, we relied on numerous partnerships. Anoka County Parks helped us by purchasing the cable and earth anchors, as well as providing tree hauling services. Sherburne County donated 130 eastern red cedar trees from county-owned property. And finally, a large portion of the labor involved was done by a Conservation Corps. MN & IA crew that worked on this project for 12 ten-hour days. Thank you to all of these partners! 

ACD partnered with the City of Anoka to design three rain gardens that were installed as part of a City street reconstruction project in the 38^th Lane neighborhood. Construction wrapped up this month in the yards of three homeowners who volunteered to take on the ownership and maintenance of these great water quality features. These three new rain gardens join two others that were installed in 2017 to clean up stormwater from this neighborhood that otherwise would wash directly to the Rum River via the storm sewer system. In total the three new rain gardens will treat about five acres of drainage area and remove about 1,164 lbs of total suspended solids (TSS) and 3.6 lbs of phosphorus annually from the stormwater runoff originating from those five acres. This results in about a 75% reduction in pollution washing to the river from this area!

Once the new plants have a chance to grow and bloom in these gardens in the coming years, not only will these rain gardens continue to provide an important water quality benefit to the Rum River, they will also host numerous pollinator species throughout the year with their abundant native flowering plants! ACD would like to extend a big thank you to the five landowners in this neighborhood, and dozens elsewhere in the county, that are willing to sacrifice portions of their yard to improve water quality in important waterways like the Rum River. These partnerships with willing private landowners are vital to ensuring clean and clear water for all to enjoy.