Similar issue was reported in 2013. Here is an excerpt of correspondence to the Mayor's office:

The drainage canal that runs next to the North Branch Library on Dr MLK @ 71st Ave N [north side of Fossil Park] is in need of attention.

There is severe erosion due to over-mowing of the banks, which is causing collapse of the banks into the canal.
The canal & drainage pipes are filling up with mud and tree roots along the banks are exposed, which will cause them to topple in a storm.
In addition, the ground [particularly along the north bank] is depressed/sinking, especially on the south side of the library.

Other contributing factors to the deterioration of the banks are:

1.) excessive traffic of non-residents
2.) parking of trucks along the banks while net-casting
3.) commercial vehicle , trailer & cars parking on the grass along 8th St, which impedes residents & service vehicles from accessing the service alley.

These 3 items could be addressed relatively easily with proper signage prohibiting parking & net casting.