The North Fork Maquoketa River helps provide a cooling breeze to people attending events in Cascade’s Riverview Park, and also serves as a fishing hole for area anglers who try their luck from its banks.
Under normal conditions, the waterway meandering through town is one of Cascade’s most pleasing aesthetic features. It’s when conditions are far from normal, that the river’s flowing waters can make waves of a financial kind.
The last two flood events and an ice jam caused some major erosion to the river banks, and during its Aug. 12 meeting, the Cascade City Council decided how best to make the necessary repairs.
Andrew McClanahan and Anthony Heddelston, with the Army Corps of Engineers, presented their findings after an inspection and offered the council three different repair options.
The first was to restore it as is with just clay fill and no riprap — loose stone used to form a foundation for a breakwater or other structure. This was the cheapest of the three options at $360,000, with a cost-share to the City of $60,000.
The second option calls for placing riprap over bedding stone and having a clay fill. This option has a price tag of $1.1 million, with cost to the City of $206,000. The cost does not include the cost for the clay fill since the amount needed and its price is unknown.
Option three is riprap over bedding stone, without clay fill. The cost for the option is $1.3 million, with the City’s cost $247,000.
The City’s cost-share can be in-kind, such as trucking the rock in from a quarry or hiring its own trucking company for the task.
After discussing the pros and cons of each option, the council approved the second one, that includes clay fill, bedding stone and riprap. The Army Corps will proceed with its work, and the City will see a cooperation agreement in the future.