About Mountain Plains Police Frequencies
- 3 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- Trunked radio systems that carry law-enforcement traffic here: South Dakota State Radio System: 9 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Mountain Plains, start with the Spearfish site of South Dakota State Radio System, about 2 miles away. Its control channels: 155.6025, 158.835 MHz.
- 1 listed entry is marked encrypted. No scanner can decode encrypted audio.
Lawrence County channels that also cover Mountain Plains
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Lawrence County Sheriff | Lawrence County Sheriff – Dispatch | 158.9100 In 155.1900 | 136.5 PL | FMN | WNBJ507 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Lawrence County Jail | County Jail | 154.0850 | 91.5 PL | FMN | WQEW629 |
| Lawrence County Sheriff | BIT Teams | 151.2950 In 155.1150 | 118.8 PL | FMN Encrypted | WSHS977 |
South Dakota State Radio System
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Lawrence County Sheriff | Lawrence County Sheriff – Dispatch | 1462 | 5b6 | D |
| Lawrence County Sheriff | Sheriff Zone 2 | 833 | 341 | D |
| Lawrence County Sheriff | Sheriff Zone 2 | 834 | 342 | D |
| Lawrence County Sheriff | Lawrence County Sheriff – Alternate | 835 | 343 | D |
| Lawrence County Sheriff | Law 1 | 1463 | 5b7 | D |
| Lawrence County Sheriff | Sheriff 3 | 1464 | 5b8 | D |
| Lawrence County Sheriff | Sheriff Patrol | 1632 | 660 | D |
| Lawrence County Sheriff | Sheriff 4 | 1633 | 661 | D |
| Lawrence County Sheriff | Law 2 | 1665 | 681 | D |
Nearest trunked radio sites
Distances are measured from the center of Mountain Plains.
Spearfish · South Dakota State Radio System
RFSS 1 · Site 66 (hex 42) · about 2 mi away
Control 155.6025, 158.835
Voice 151.19, 155.9775
Lead (Terry Peak) · South Dakota State Radio System
RFSS 1 · Site 14 (hex E) · NAC 470 · about 10 mi away
Control 160.005, 160.035, 160.095
Voice 159.6
Sturgis (Sly Hill) · South Dakota State Radio System
RFSS 1 · Site 45 (hex 2D) · about 18 mi away
Control 157.95, 158.58
Voice 155.5125, 157.8, 158.07, 159.4275
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 Mountain Plains?
We do not have a dispatch channel listed specifically for Mountain Plains. County-level dispatch channels in the same county: Lawrence County Sheriff 158.9100 MHz (136.5 PL).