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Posted on May 14, 2018 at 5:09 PM by Ryan Hiniker
Drainage update 5/14/2018
Upcoming Drainage Hearings or Meetings:
meeting or hearings are scheduled at this time.
Storm Water Research:
For years now, many SWCD’s and clean water groups have been conducting small scale research to
remove sediment and nutrients from lake water, ditch system water, and storm
waters. These small-scale studies have
opened the gateway for large scale studies the University of Minnesota has been
conducting, with some really eye-opening results.
The U of M
(University of Minnesota) conducted two separate experiments. One experiment was to find which metals are
better at attracting water soluble phosphorus in enhanced sand filters. The other experiment was then measuring the
results of phosphorus reduction in these enhanced sand filters. In their iron/sand filters, they actually add very small pieces of iron metal to the sand to attract the water soluble phosphorus. The initial $70,000 funding for these
experiments will be wrapping up at the end of 2018. There is however an additional $1.5 million already in place for ongoing research and technology for the next
two years. The researchers from the U of
M are planning on issuing some findings from their studies and calling it the
research roadmap for storm water in Minnesota.
experiments are going beyond just the normal sediment and nutrient studies. Sure, there is an extreme need for more
studies on nutrients, but a new focus is now also being aimed at chloride. Chloride is a water quality killer that has
been silently building up for decades.
Much of our issues with chloride stem from all of the road salt that we
use every winter to keep our roads ice free.
Water softeners also play a role in polluting our waters. The issue of chloride pollution is of course related to the salt component. One spoonful of salt can adversely affect 5
gallons of water. The good thing about all
of this information is we are learning quickly what the issues are and quickly
figuring out new ways to treat the water for healthier, cleaner water for our
This was an article
that I came across on the BWSR website (Board of Water and Soil Resources). We locally plan on trying multiple locations
of smaller scale experiments for reducing phosphorus levels in water. I will keep you posted as to more specifics
of this when it happens - hopefully later this year - on two separate ditch systems. For more reading on this subject for
yourself, click the link.
Picture is an example of this sand filter. Picture referenced from University of Minnesota storm water study.
Recent Drainage Inspections – week of May 7 – May 11:
Valley & Cambria Twp.) We have multiple locations on the
tile portion of this system that have on-going issues with collapsing old
tile. We also had issues with multiple
beaver dams on the open ditch area. The
beaver dams have been removed as of last week.
Twp.) Our issue with the plugged tile and bubbling intake
will have to wait - probably another week.
The Mapleton area last week saw over two inches of rain in some areas.
CD50 & CD27
(Judson & Butternut Valley Twps.) We actually have two contractors
working at the same time on these systems.
One contractor is finishing up with grinding and removing the trees and shrubs,
while the other contractor is cleaning sediment out of the open ditch.
& Garden City Twps.) Inspected more areas of sink holes
and collapsed old tile.
Twp.) Our contractor started last week moving in large
quantities of large rip rap rock. This
rock, along with reshaping the ditch bank, will hopefully fix some of our
sloughing issues along a couple stretches of this open ditch portion.
Twp.) The contractor has finished with cleaning the
sediment out of the open ditch and most of the spoil piles have been leveled. We did have the contractor install two new
ASI’s or alternative side intakes. I will
try to get pictures of them, but it involved quite a bit of reshaping and
making large berms around new intakes to the open ditch.
We have had a
huge volume of calls lately about collapsed tile issues or open ditch issues. We are trying to handle all calls or reports
as quickly as we can. Please remember
that we do not guarantee same day service.
We need to verify that the issue is in fact over a county tile line
before issuing the repair be made. It
may take us a few days to get out to the site to visit in-field before ordering
a repair be made. A friendly reminder as
many people are busy trying to get crops in, if there is an issue with a county
tile and we are not notified about it before the repairs are made, we reserve
the right to deny payment.
call with issues you observe on our public drainage system, as there is a lot
of open ditch and tile in our county and only two of us in the drainage
department. We will do our absolute best to service your issues and
concerns as we receive them.
We require that all repairs to a county
drainage system (tile or open ditch) be authorized by one us in the drainage
office, either Craig or myself, before any repairs are made.
Drainage Management Specialist