I read on the ScanIowa Yahoo!Group that in 1999, West Liberty PD was dispatched on the county sheriff repeater 158.730 (127.3). 155.820 (127.3) was their public works and PD car-car channel. In 2002, they started using NEXTEL for PD car-car communications. I don’t know if this information is still correct as I’ve never been to West Liberty myself.
Here is some more info I found through internet searching. If you confirm any of these, please add them to the database.
http://www.geocities.com/n0ngl/qcscan/ia/ia70.html
West Liberty
PD 154.8300 BM
PD 154.9500 BM
VFD 154.1750 BM
LG 155.820 BM
http://www.iascanner.com/muscatine.html
MUSCATINE COUNTY FREQUENCIES
151.130 Roads
151.175 Sheriff Repeater F-2 Tone - 127.3
151.265 Conservation
154.175 Fire Tone - 146.2 Dispatch Only
154.830 Sheriff Ops - F-1
155.310 Information - Base
155.850 Car to Car
155.910 Information - Cars
158.730 Sheriff Dispatch Tone - 127.3