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Sep 26

Drainage Update 9/26/2019

Posted on September 26, 2019 at 1:09 PM by Ryan Hiniker

Drainage update 9/26/2019


Upcoming Drainage Hearings or Meetings:

  • No upcoming hearings or meetings.

Project Updates:


  • CD48 (Cambria Twp.)  Final checklist clean-up work and televising of new pipe.
  • JD09 (Le Ray Twp.)  Waiting until after harvest to finish minor grading and televising of the new pipe. 
  • JD34 (Le Ray Twp.)  Nothing new from last week.    
  • CD28 (Lincoln Twp.)  All new tile is complete.  Waiting for things to dry up a bit before completing any final grading of the construction area.  Televising of the new tile line also needs to be completed on this repair.                                                                                                                                      

Drainage Minutes:

Things have been rather busy the last couple weeks.  We still have a lot of repair work from earlier this year, as well as the work that keeps coming in.  This fall will be very busy with repairs, some of them very small while others are rather large.

Our contractor has been out mowing and spraying ditches in the western part of the county over the last month or so.  The contractor has  spraying for the year and mowing will continue again after harvest season, weather permitting.

We should have a couple of large-scale cleanings of open ditch systems coming up later this year, two in particular may cover almost thirteen miles of open ditch.  These cleaning include cleaning of sediment, tree and brush removal, reshaping of side slopes, new culverts, new water quality structures and buffer grass seeding.

Both of these jobs will be large enough that they will be put out for public bidding.  We hope to have them bid later this year and completed before planting season next spring.

We are moving forward with our iron/phosphorus filter project near Lake Crystal.  We will be installing this filter along a branch of public county tile line.  The filter will clean out sediment and phosphorus from the tile line water before it goes to the CD56 open ditch.

The filter is designed to handle only normal flow situations.  With large rain events, where the tile is running at full capacity, most of the water will bypass the filter and drain straight to the ditch, as it currently does.

To my knowledge, this subsurface phosphorus filter will be the first of its kind in the state of Minnesota.  Along with being the first, there are unknowns such as whether or not the filter will work and how effective it will be.  We have seen great results with similar subsurface phosphorus filters in other states.

We hope to start installing the new filter right after the neighboring bean field is harvested.  We are very fortunate to be able to work with so many great local groups to accomplish this.  I will keep everyone informed of any updates, including photos of the process. 

Have a great week everyone and enjoy the great weather.


Recent Drainage Inspections – week of September 16 – September 20:

  • CD35 (Mapleton Twp.)  Beaver dam issues have some water backing up in a portion of the open ditch on this system.  We are currently working to resolve this problem.
  • JD48 Brown (Butternut Valley Twp.)  I have been completing full inspections of open ditches that were mowed this year.
  • CD05 (Medo Twp.)  We had a report of beaver issues near the outlet of this open ditch system.  The system joins the Cobb River and issues with beavers are almost continuous.  We do plan on completing some major cleaning and maintenance of this entire system later this year.
  • CD76 (McPherson Twp.)  Some minor tile repairs.
  • CD69 (Mankato Twp.)  We have some on-going issues with the outlet of this public system where it joins a city drainage structure.  Debris and sediment are almost constantly restricting the flow for this system.  The photo below shows a plugged intake. cd69
  • JD09 (Cambria Twp.)  Completing a full inspection after mowing and spraying of the open ditch area.
  • JD36 (Cambria & Butternut Valley Twps.)  Completing inspections to areas of open ditch after mowing and spraying.
  • JD38 (Shelby Twp.)  Inspecting and maintaining one of our larger tile structures and drop intakes.
  • CD26 (McPherson Twp.)  Still dealing with on-going beaver issues.  We are working with a contractor to help with future issues.
  • JD11 Waseca (McPherson Twp.)  Inspected the open ditch area and large concrete carp structure that is shown in photo.jd11

No blog next week as I will be on vacation.  We will resume blog the week of October 7, but it may be a mid-week posting.


Mowing will resume after harvest for some southern portions of the county.

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.




Ryan Hiniker

Drainage Management Specialist