Archive for the ‘Water Quality’ Category
A new livery will open in the Huron next year! This month’s roundup of water news also includes articles on three contaminants we are watching closely here that affect the Huron River watershed – blue-green algae, Dioxane and coal tar based pavement sealers.
Former Mill Creek Sports Center in Dexter to become canoe livery
Exciting news! Dexter will be home to a new canoe livery. Occupying a vacant building on Mill Creek in the heart of downtown Dexter, Michigan native Nate Pound hopes to renovate and be open for business by paddling season in 2017. Long term plans include a climbing wall and/or bike rentals.
Blue-green algae adapting easily to rising carbon dioxide levels
Climate change will challenge all species to adapt to new conditions. Some will fare better than others. New research shows that blue-green algae, the type of algae that includes Microcystis – the algae that contaminated Toledo’s water system in 2014 – are likely to be particularly good at adapting. There are implications for water quality, drinking water and aquatic ecosystems as we move to a more carbon dioxide-rich environment.
The Green Room: The Ann Arbor Area’s 1,4 Dioxane Plume
HRWC Board Member and Washtenaw County Water Resources Commissioner, Evan Pratt, shares his thoughts on pursuing Superfund designation for the Dioxane plume contaminating the groundwater in Ann Arbor. Mayor Chris Taylor discusses the City’s involvement and how he is engaging with State and Federal elected officials.
HRWC’s campaign to ban coal tar based sealcoats throughout the watershed continues to make headlines. So far Van Buren Township, Scio Township, Ann Arbor, Hamburg and Dexter have passed ordinances with many other communities reviewing potential action. WEMU’s Issues of the Environment interview discusses the issue broadly and the Detroit Local 4 News spot highlights the recent ban in Hamburg Township.
Michigan’s water has had the attention of the national news for months now. While Flint dominates the headlines, there have been other news worthy water issues in this state including the Waukesha water withdrawal request hearing for a diversion of Great Lakes water to a location outside of the basin, and the very local issue of the spreading dioxane plume under Ann Arbor and Scio Township. The Huron also gets a nod in a national recreational magazine as a source of inspiration for one rising musician.
Dioxane in Ann Arbor’s groundwater: a slow-motion environmental disaster The dioxane contamination of the groundwater in Ann Arbor and Scio Township has been making headlines recently. The Pall Corporation is responsible for the contamination and the cleanup. The City has been pushing the Department of Environmental Quality to set stricter limits on dioxane levels for some time now without success. Current standards allow 85 parts per billion of dioxane. Ann Arbor would like to see standards require concentrations in the single digits, consistent with recent research on cancer risk.
Michigan Holds Hearing On Waukesha Plan To Divert Great Lakes Water – A hearing was held last week on what would be the first inter-basin transfer of Great Lakes water. The 2008 Great Lakes Compact is an agreement among Great Lakes states and Canadian provinces that requires strict criteria be met before permitting a diversion. HRWC’s Laura Rubin was on hand to provide comment along with several other water and policy experts from throughout the state. This will be a precedent setting ruling as it has the potential to open the door to more requests for Great Lakes water outside of the Great Lakes basin.
Why didn’t state officials heed the warnings in Flint? The Flint water crisis is all over the news. One storyline HRWC has been shining a light on is highlighted in this piece. The state’s environmental regulatory agency, the Department of Environmental Quality, has seen a steady decline in political support. The agency, along with other regulatory agencies, suffers under a culture that discourages staff from speaking up when issues are identified. Financial support, political backing and a culture that promotes adherence to regulations and transparency are necessary to avoid future Flints. Read more about Laura Rubin’s thoughts on this issue in her recent blog.
Chris Bathgate Goes Back to Nature Huron River watershed native Chris Bathgate is featured in Outside magazine. The acclaimed musician named the Huron River as one of his sources of inspiration. Imagine that! Bathgate talks about the importance of nature and quiet to his wellbeing and creative process. You may even “hear” the Huron on his latest album.
January 23rd was a beautiful day for the annual Stonefly event. The weather hovered around 30 degrees and the sun shone nicely throughout the volunteers’ time outside. They were searching for stoneflies, an insect that only lives in the healthiest creeks and rivers. The absence and presence of stoneflies, and the trends in their population that we see after visiting a location over and over again, give us clues as to how the water is changing over time.
Unfortunately for the purposes of data analysis and clear-cut answers, stoneflies are affected by more than water quality, however. Strange weather can also play havok on their ecosystems, causing populations to drop off. Our volunteers came back with very low amounts of stoneflies this year, and while we can’t be certain, it is possible that our variable Michigan weather is to blame. You may recall that December was unseasonably warm in 2015, and wonder how that might affect the insects. However, in this case, it wasn’t a warm December that hurt the stoneflies, but instead February 2015, a month that was extremely cold. In fact, it was one of the coldest February’s on record. When streams and rivers are covered by thick ice, oxygen levels decline, which is bad for all aquatic life but particularly bad for stoneflies, who have high oxygen requirements. Also, February and early March are when winter stonefly adults are emerging, mating, and depositing eggs; all activities hampered by extreme cold and ice cover. In summary, the cold 2015 winter had direct consequences for the stoneflies in 2016.
Volunteers did not find stoneflies at many places this year, but five locations in particular that did not have stoneflies were noteworthy as all of them have a long (10+ years) history of always holding stoneflies. In addition, all of these locations have great insect populations at our other events and there are no indications of water quality issues, further strengthening the argument that this year was a weather-related population decline. These five locations were three places on the main branch of the Huron (White Lake, Zeeb, and Bell Roads), Arms Creek at Walsh Road, and Boyden Creek at Delhi Road. Many other locations had reduced numbers or family counts.
Those interested in all results can see them here: PDF report.
Prior to the event, I laid out several examples of things that we would watch for this year:
Davis Creek at Pontiac Trail: Stoneflies have been dropping off here for the past decade. Volunteers did come back with stoneflies this year, though not the winter stoneflies but rather a family that is more widely available. Still, this is good news.
Honey Creek at Wagner Road: Stoneflies were missing here in 2014 for the first time, and unfortunately volunteers did not find them this year either.
Woods Creek at Lower Huron Metropark: Just like Honey Creek at Wagner Road, stoneflies were not found here for the second year in a row.
Insect populations are resilient and can bounce back with good water quality and suitable weather conditions. While this year was disappointing, the mild winter we are experiencing right now may result in a bumper crop in 2017. Come next January, HRWC and its volunteers will be ready to check it out!
The Flint Water crisis is on everyone’s mind. We can’t get over that it happened, the long-term impacts, the tragedy, and where we go from here. At HRWC we are saddened and angry, but not that surprised. Over the last year many environmental debacles point to a serious threat to clean water and a safe environment. Starting with Volkswagen’s admission of cheating on emission testing to the natural gas leak in California, and now to the Flint drinking water contamination, they all highlight a lack of trust, judgment, and oversight on human health and safety issues. What shocks me the most though, is the lack of accountability and regulation. I shouldn’t be surprised given Michigan’s recent derision of regulation, budget cuts to environmental protection, and a focus on shrinking government. Michigan ranks 50th among state in government transparency.
In the U.S., drinking water regulations were first enacted by the federal government in 1914 addressing the bacteriological quality of drinking water. This regulation was later strengthened in the 1960s as it became clear that industrial processes were threats to clean water and human health. Local governments were to provide clean water and safely dispose of waste. Oversight of local governments and industry was an expected role of state and federal government.
Despite dozens of statewide environmental disasters (Enbridge oil spill, the Pall Gelman contamination, industrial clean-up sites), the State of Michigan has been shrinking the budgets and staff of the oversight and regulatory departments. In 1995 Governor John Engler split the Michigan Department of Natural Resources (MDNR) into the Michigan Department of Environmental Quality (MDEQ) and MDNR. The DEQ mission is to promote the wise management of Michigan’s air, land, and water resources to support a sustainable environment, healthy communities, and vibrant economy. Governor Engler said the split secured more direct oversight of state environmental policy, but then he reduced the number of state environmental employees through budget cuts. A year later, oversight for drinking water protection was transferred from the Michigan Department of Health to the MDEQ. In 2009, Governor Jennifer Granholm briefly merged the MDNR and MDEQ again as the DNRE. In 2011, Governor Rick Snyder’s first-ever executive order, Executive Order 2011-1, split the DNRE, returning DNR and DEQ into separate agencies.
Additionally, the MDEQ’s budget and resources have been dramatically reduced. In the past 15 years, the general fund contributions to the MDEQ have been cut by 59% and the full-time equated positions have been cut by 25%.
The impacts of these cuts and the general disdain for regulation is prevalent in MDEQ leadership and has led to a minimalist approach by most staff. It is clear that the primary responsibility for what happened in Flint rests with the MDEQ, despite the Governor’s efforts to spread the blame. MDEQ failed in its responsibility to ensure safe drinking water in Michigan and, again, in its dismissive and scornful tone toward residents’, health care professionals’, and scientists’ discoveries and concerns. Worse yet, the blatant misrepresentation of facts and manipulation of data to cover for bad policy decisions at the cost of children’s health suggests an agency well off the rails of its stated mission.
I see these problems regularly in our mission to protect and restore the Huron. Permits are quickly issued with little review. Corporate and municipal self-reporting with little, if any, review is common. The pursuit of scientific understanding and application is given low priority. The MDEQ staff that regulate inland lake and streams are overwhelmed with permit reviews and enforcement activities resulting in rubber stamped permits that rarely get more than a cursory review (see HRWC’s winter newsletter for an example). HRWC receives dozens of calls annually from citizens impacted by poor permitting and design, natural resource destruction or pollution violations that, having called MDEQ staff, want some help. Without our staff reviewing the problems, making site visits, and/or making phone calls and using our connections and influence, nothing would happen. Even the most well-intentioned and competent MDEQ staff are only able to respond to the most pressing problems, and much pressure is put on them to get out of the way of economic development.
What can we do to avoid these same disasters from happening again? We need to remind the Governor about MDEQ’s responsibility to ensure clean water and push him to restore budgets, add staff and training, and support staff who serve that mission. Providing clean drinking water is a series of steps, a chain of events and actions starting with the source water. We need to empower citizens and agency staff to speak up and advocate effectively. We need to use science and water quality monitoring to develop policy and action. Finally, we must listen to the disempowered, to continue to take their concerns seriously, ask the questions and not take it for granted that expertise, good judgment and oversight are a matter of course.
It is January, which means that one of HRWC’s favorite events, the Stonefly Search, is right around the corner.
Stoneflies are interesting because they are the most pollution intolerant group of aquatic insects that we have in Michigan. They can only thrive in the cleanest water with high levels of dissolved oxygen. When they are found at a location it is a confirmation of high water quality, and when they disappear from a stream it is a warning sign that water quality has degraded.
It might seem strange to many that we hunt for stoneflies in the winter. This is because two of the stonefly families, the Capniidae and the Taeniopterygidae, change from aquatic nymphs to terrestrial adults in the late winter and early spring. This means that we can’t find them during the normal April River Roundup, and so we have to look for them earlier in the year!
The Stonefly Search always produces interesting results. Let’s take a look at some of the findings in recent years.
Reported in 2013: Four sites had the best stonefly samples that had ever been seen at those locations: Chilson Creek at Chilson Road, Fleming Creek at Galpin Road, the Huron River at Flat Rock, and Woodruff Creek at Buno Road. At each of these sites, the stoneflies normally found at the location were there, but also new stonefly families were found that had never been seen there before! A greater diversity of stoneflies indicates greater stream health. These are promising results and hopefully it will continue into longer term trends.
Reported in 2011: Since 2007 and up through last year, our volunteers have found 4 families of stoneflies in Mann Creek. This includes 2 stonefly families that can be found in creeks year round (Perlidae & Perlodidae), and the 2 stonefly families that are only found in the winter (Capniidae & Taeniopterygidae). Even in the Huron’s healthiest streams, it is unusual to find more than 2 families of stoneflies during the Stonefly Search. So, Mann Creek is special indeed. Mann Creek flows through a residential neighborhood- but one really interesting thing about Mann Creek is that there is a very wide natural riparian zone surrounding the creek. This riparian area provides habitat and food for stoneflies as branches and leaves fall into the creek. To see Mann Creek and its impressive riparian zone, click here.
Reported in 2015: Davis Creek at Pontiac Trail (near South Lyon) is a location where the stonefly population has dropped over time. This change is concerning because it happened slowly over the last ten years and our spring and fall samples show a very similar pattern. In the early 2000s we regularly found one or two stonefly families at the creek, but they started to drop off and now have not been found since 2009.
Reported in 2015: The team searching for stoneflies in Honey Creek at Wagner Road (Ann Arbor) were unable to find stoneflies. This site has been sampled 14 times since 1995, and this is the first time that stoneflies could not be found. This is a site with lots of turbulent highly oxygenated water and should be a great place for stoneflies. Taken in isolation, the absence of the stoneflies at Wagner Road would not be concerning given that this is a single sample. However, two upstream Honey Creek Adopt-a-Stream sites used to have stoneflies but haven’t in years. Stoneflies haven’t been seen in Honey Creek at Jackson Road since 2008; they haven’t been at Honey Creek at Pratt Road since 2003. All of the pieces combined indicates that the overall quality of Honey Creek is degrading over the last decade.
Reported in 2013: The team searching for stoneflies in Woods Creek in Belleville came back disappointed. Wood’s Creek at the Lower Huron Metropark has been sampled 12 times since 1997, and this is the first time that stoneflies could not be found. The problem likely comes from the thick ice and difficult conditions rather than pollution or disturbed stream habitat, but we will keep an eye on Wood’s Creek next year.
What will we find in 2016?
Will Mann Creek continue to reign as the king of Huron River stoneflies? Will we find stoneflies where they have never been before?
Will we find stoneflies this year at Davis, Honey, and Woods Creek, or has the water quality there continued to decline?
We will see you on January 23 and we will answer these questions together!
A Celebration of a Very Cold Event
by Dr.David Wilson
We don our coats and boots, go forth to break the ice
In frigid, frosty weather that no one could say is nice
We flounder through the streams in search of a great prize
Taeniopterids and Capniids, precious winter stoneflies
Winter stones are quite the thing
Though one surely might be wondering
How these tiny creatures could ever be so bold
As to live and thrive in this bitter winter cold
Paul tells us that in winter these critters really thrive
Cold water holds the oxygen to keep them all alive
And winter is helpful in another major way
The cold keeps fierce predators so very far away
Quite sensitive to any water pollution,
Winter stones provide a quick solution
If we find ‘em we can be sure
That the stream is sweet and pure
The critters are small and rather dark
In this frigid weather they have a lark
Scamper about in the ice and snow
There’s no other place for them to go
To ID them here’s what you do
Look for wingpads four and cerci two
Along the flanks no gills are found
And on each leg two claws astound
The ice is thick, the water chills,
With cold I’m fed up to the gills
But none could say that we are quitters
We’ll search ‘til we find those little critters
Believe me, I know whereof I speak
You’ll find out fast if your waders leak
One hears screams of pain from the bravest jocks
When that icy water hits their socks
Collectors and runners can stay in motion
Stay warmer thus, I have a notion
But picking requires that one stand still
Can be quite bleak, cause many a chill
Don’t go on ice unless waders you wear
If you’re not wearing waders your weight it won’t bear
If you should venture this dumb thing to do
I guarantee you’ll surely break through
Let me warn you right now; listen up and take heed
Bring twice the wraps you think that you’ll need
That usually turns out to be about right
So that you are not left in a piteous plight
A jug of warm water is always quite pleasing
Helps to keep that D-net from freezing
And stout rubber gloves keep collectors’ hands dry
Help a great deal when frostbite is nigh
On these trips a truly most gracious amenity
May help the participants keep some of their sanity
A big jug of cocoa sure hits the spot
Beloved by all if it’s nice and hot.
Stonefly Search is coming January 23! Registration and info here.
About the author:
Dave Wilson is a HRWC volunteer and trained collector who has attended 9 Stonefly Searches and countless other HRWC events.
Recently, a team of us HRWC staff went out to see if we could detect the kind of effects scientists from elsewhere are seeing from the application of coal tar sealants. In short, coal tar sealants and their recent cousins release a class of chemicals called polyaromatic hydrocarbons (PAHs), some of which are toxic and known to cause cancer. For more detail on that work see a previous blog entry and our web page summarizing the threats.
To find out if this is indeed a concern in our area, we identified a few detention ponds to sample within the Huron’s biggest urban area of Ann Arbor. The City of Ann Arbor staff helped us find publicly accessible ponds that would capture runoff predominantly from urban areas with lots of hardened surfaces like parking lots and driveways. The city does not use coal tar sealants on its roads, but many businesses use it on parking lots and residents use it on driveways. We selected three ponds from different parts of the city to sample in a pilot effort to determine the level of PAH contamination of pond sediments. Ponds were selected from within the Malletts, Traver and Fleming Creek watersheds.
Sampling these ponds is more difficult than it sounds. It required borrowing a row boat from our friends in the Eastern Michigan University Biology Department, hauling the boat through heavy brush and up steep hills, and rowing out through shallow, mucky waters where we dropped a ponar (i.e. sediment scooper) to grab 5 samples of the bottom sediment. These samples were combined into a single sample for each pond that was then sent to a private lab (with the help of Ann Arbor’s Water Treatment Laboratory staff) for PAH identification and quantification.
The results were shocking. Of the ten PAH samples with identified toxic effects levels, sediments from the Malletts Creek pond exceeded the “probable effects concentration” (PEC) for eight of them! This is the concentration of PAHs in the water that will have adverse affects to aquatic organisms. Sediments in the Traver and Fleming ponds exceeded the PEC for 6 and 4 of the PAH species, respectively. For many of the PAH samples, the PEC was exceeded by 10- or even 100-fold, indicating that the sediments are highly toxic!
Since other studies have indicated that between 50 and 70% of PAHs in detention pond sediments originate from coal tar sealants, it appears that Ann Arbor (and most probably other urban areas in the watershed) has a problem with coal tar leaching. While we only sampled three ponds thus far (we plan to sample others this spring), the results are consistent with findings from research scientists elsewhere.
So, what do we do now? HRWC is currently working with local municipal leaders in Van Buren and Scio Townships, the City of Ann Arbor and elsewhere to pass ordinances to ban the application of coal tar sealants. A state ban would be even more effective but we need to build the political will. Contact HRWC staff to find out how to get involved in your community, and check out the links above to learn what to do on your own driveway.
When the leaves start to brown and jackets are unpacked from storage, you know it’s time – winter is just around the corner! One issue on all of our minds at the HRWC office is road salt.
What’s the deal with road salt?
Transportation departments and cities are often charged with keeping roads clear and safe during winter months. With our mobile population, salting increases public safety, ensures emergency services, and promotes continued economic activity. Municipalities and private homeowners most often use sodium chloride when applying rock salt. Although it is cost efficient in the short term, salt application has many long-term implications such as harmful levels of chloride in our water bodies. Increased levels of chloride negatively impact aquatic ecosystems by disrupting the food web, inhibiting growth, and poisoning songbirds.
Decades of salt application has allowed chloride to infiltrate our groundwater supplies, meaning our rivers (and drinking water) begin with an already elevated level of chloride. Less salt is required for streams to reach harmful concentrations. Many drinking water wells and streams around the country have chloride levels above the EPA’s maximum threshold. This can be bad news for those on salt restricted diets, causing hypertension, cardiac disease, and even stroke.
How do we fix it?
Even with the same amount of urban land use over time, chloride concentrations have increased.
Unfortunately, there is no perfect, eco-friendly solution. Alternatives often labeled as environmentally friendly include salts like magnesium chloride and calcium chloride, beet juice, molasses, and vodka distillery leftovers — all of which still include salt! Fortunately, new techniques can help make that amount as small as possible. Canada has identified road salt as a national environmental hazard, and is taking definitive steps towards reducing impacts to water quality such as applying a wet brine before snowfall to prevent ice bonding with the pavement. Many cities are promoting efficiency programs like Smart About Salt in Waterloo. Data collected by the University of Waterloo five years after program implementation demonstrated a 60% reduction of chloride!
What can YOU do as a homeowner?
We have a few ideas! The best option for keeping our Huron happy and healthy is to shovel early and often, without using de-icers at all, even ones labeled as more friendly to the environment. If you must use a de-icer, use as little as needed to get the job done.
Check out our Take Action page: Use Less Salt for more information.
For a deeper dive on the issue, take a look at the following articles (some more technical than others):
Solving Slick Roads and Salty Streams, Stormwater Report, March 4, 2015
Road Salt is Polluting our Rivers, Wired, March 12, 2015
What Happens to All the Salt We Dump On the Roads?, Smithsonian.com, January 6, 2014
Winter Street & Sidewalk Maintenance, City of Ann Arbor Snow Removal webpage
Canada Sets National Targets for Road Salt, Study Shows Stream Toxicity from De-icers Increasing Rapidly, Stormwater Report, February 3, 2015
The Effect of Road Salt on Urban Watersheds and Management Options — HRWC’s very own Stevi Kosloskey was kind enough to share her research paper on road salt application and subsequent implications on water quality, including data from the Huron River. (Thanks Stevi!)
This edition of News to Us shares local news on recovering Osprey populations, increasing entrance fees in our metroparks system and an examination of Livingston County drinking water issues. At the state level, Michigan is considering banning of plastic microbeads. And in national news, aging dams are making headlines again.
Osprey population booms in Southeast Michigan Osprey populations are rebounding in the Huron River watershed. The Huron River Watershed Council helped install two new platforms for nesting sites in the river. Learn about the bird and its recovery in this article. See more on HRWC’s role in this mini-documentary.
Microbeads and the Great Lakes We have shared stories about the issue of plastic microbeads from bath and beauty products in previous editions of News to Us. These beads end up in our lakes and rivers as they are not captured in the wastewater treatment process. Now, the Michigan legislature is considering a ban. Michigan is the last remaining Great Lakes state without a ban. Here’s hoping we can join the rest of the region in protecting our lakes and streams from this pollutant.
Huron-Clinton parks plan: Higher fees, bigger offices Huron Clinton Metroparks are a significant landholder in the Huron River watershed, much of it along the river itself. The parks are wonderful amenities for our residents and play a role in protecting water quality and freshwater ecosystems. The park system is considering raising rates for entrance fees. This article shares more.
Aging And Underfunded: America’s Dam Safety Problem, In 4 Charts America’s dams are getting old. The nation received a D grade in a recent assessment (Michigan received a D as well). On a day to day basis, this may not be a big deal. But the flooding that occurred in South Carolina last month illustrates why we must be proactive about this issue. During those floods, more than 20 dams collapsed, dramatically increasing the impact of already damaging rainfall. Funding is a challenge but preventing a collapse is almost always less expensive than recovering from one.
Safe to drink? Livingston faces own water issues In response to the Flint drinking water crisis, one reporter decided to look into the potential for this kind of disaster in Livingston County. While the Flint scenario is not a likely one, the article does share the myriad issues that can occur with drinking water and how water suppliers, the county and residents are helping to ensure safe drinking water for everyone.
Streams ranked from best to worst: Where does your favorite fall?
On October 3, HRWC volunteers spread across Oakland, Livingston, Washtenaw, and Wayne Counties and looked for the aquatic insects and crustaceans that indicate the water and habitat quality of our river and creeks.
Using this and other environmental data collected by HRWC volunteers over the past 20 years, I have developed a ranking of the various streams in the Huron River Watershed. Streams listed at the top of this list have the best aquatic life and habitat in the Huron, and streams at the bottom of list are extremely impaired with little aquatic life and highly disturbed habitat.
Volunteer-collected data directly contributes to our knowledge of the conditions of the watershed and is a key component in directing management and restoration activities.
If you want more details on the ranking below, HRWC will present it and other data findings on January 12, 2016, 6 pm at our office (1100 N Main Street, Ann Arbor). All are welcome and no registration is required.
Ranking of Aquatic Life and Habitat (from best to worst)
1. Huron Creek (Dexter)
2. Woodruff/Mann Creeks (Brighton)
3. Honey Creek (Pinckney)
4. Huron River (Upstream of Proud Lake)
5. Woods Creek (Belleville)
6. Boyden Creek (west of Ann Arbor)
7. Pettibone Creek (Milford)
8. Fleming Creek (Ann Arbor)
9. Huron River (from Proud Lake downstream to Zeeb Road)
10. Portage Creek (Multiple townships to the northwest of Ann Arbor and north of Dexter)
11. Mill Creek (Dexter and Chelsea)
12. Hay Creek (east of Pinckney)
13. Arms Creek (Webster Township)
14. Huron River (Ann Arbor and downstream)
15. Davis Creek (South Lyon)
16. South Ore (Brighton)
17. Honey Creek (west of Ann Arbor)
18. Chilson Creek (west of Brighton)
19. Horseshoe Creek (Whitmore Lake)
20. Downriver Tributaries (Port Creek, Bancroft-Noles Drain near Flat Rock)
21. Traver Creek (Ann Arbor)
22. Malletts Creek (Ann Arbor)
23. Norton Creek (Wixom)
24. Swift Run (Ann Arbor)
25. Millers Creek (Ann Arbor)
Full River Roundup report is available for download.