except Three River Parks are their own entity seperate from DNR, so i would guess they are doing their own thing. not sure how related this is or if this is the correct usage, but i found these -
Three Rivers Park District KWL350 453.47500 2004-02-04 1 0 FB PW PLYMOUTH
Three Rivers Park District KWL350 453.47500 2004-02-04 1 0 FB2 PW PLYMOUTH
Three Rivers Park District KWL350 453.47500 2004-02-04 150 0 MO PW PLYMOUTH
Three Rivers Park District KWL350 458.47500 2004-02-04 11 0 FX1 PW PLYMOUTH
Three Rivers Park District KWL350 458.47500 2004-02-04 150 0 MO PW PLYMOUTH
Licensee Name: Three Rivers Park District
License: KWL350
Status: Active (2004-02-04)
County: HENNEPIN
State: MN
Radio Service: PW: Public Safety Pool - Conventional
Notes: APPLICANT IS A UNIT OF LOCAL GOVERNMENT RADIOS WILL BE USED FOR DISPATCHING OF EMERGENCY PERSONNEL AND EQUIPMENT