Skip to content

Garrison Police Frequencies

We do not have frequencies listed specifically for Garrison in Powell County, Montana yet. Countywide channels for Powell County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Cominco Mountain (Montana Public Safety Communications System), about 6 miles away.

About Garrison Police Frequencies

  • 4 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.

Powell County channels that also cover Garrison

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Powell County SheriffNorth154.0550136.5 PLFMNKNGL593
Powell County SheriffSouth155.6550136.5 PLFMNKNGL593

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Powell County SheriffSheriff Operations154.0550FMNKNGL593
Powell County SheriffSheriff Operations155.7900FMNKNGL593

Nearest trunked radio sites

Distances are measured from the center of Garrison.

Cominco Mountain · Montana Public Safety Communications System
RFSS 1 · Site 10 (hex A) · about 6 mi away
Control 153.845, 154.95
Voice 155.025, 155.25
State Prison 800 · Montana Public Safety Communications System
RFSS 1 · Site 54 (hex 36) · NAC 164 · about 11 mi away
Control 851.0375, 851.1375, 851.375
Voice 853.15, 853.675
MacDonald Pass · Montana Public Safety Communications System
RFSS 1 · Site 7 (hex 7) · NAC 16C · about 25 mi away
Control 154.34, 161.975
Voice 154.1, 154.4, 159
What do these numbers mean?
Control channel
The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
Voice
The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
Site
One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
RFSS (Radio Frequency Sub-System)
A group of sites run by the same controller. Large Project 25 systems can have several.
NAC (Network Access Code)
A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
Talkgroup
A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.

Common questions

What frequency do the police use in Garrison?

We do not have a dispatch channel listed specifically for Garrison. County-level dispatch channels in the same county: Powell County Sheriff 154.0550 MHz (136.5 PL); Powell County Sheriff 155.6550 MHz (136.5 PL).