State of Iowa Govermental Radio Systems and users
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A New Frequency has been added for use by Iowa State Agencies. 151.475 is used by mobiles only. Police, Fire, EMS, DOT, & Tow Trucks are or have been suggested as users. So far, only DOT & DPS have been heard.
Department Of Public Safety radio system
155.640
155.790 		(154.650)
(154.770) 		DPS area 1
LEA area 1 		a
155.655
155.685 		(154.665)
(154.755) 		DPS area 2
LEA area 2 		Tone are used to access repeater sites.
A=127.3 , B=146.2, C=156.7, D=192.8
155.565
155.700 		(154.665)
(154.800)		 DPS area 3
DPS area 3		 a
155.430 CAR Post to mobiles or mobiles to mobiles, also aircraft All simplex channels are carrier squelch on receive.
155.505 AIR Post to aircraft, or aircraft to mobiles, also mobiles to mobiles
155.445 CIS/Ch.4/CAR 2 mobiles to mobiles, also aircraft
155.475 AID Post HQ, mobiles, aircraft, and local agencies
155.370 POINT Post HQ, Communication Centers, local agencies, aircraft, no mobiles
458.625
458.950
458.700		 extenders
Channel 7
Channel 8		 allows Trooper to use mobile radio while out of the car.
mobiles, handhelds, & aircraft (except within 50 mile radius of Omaha NE.)
mobiles, handhelds, & aircraft
Post Location
1 Des Moines
2 Osceola
3 Council Bluffs
4 Carroll
5 Storm Lake
6 Spencer
7 Fort Dodge
8 Mason City
9 Cedar Falls
10 Oelwien
11 Cedar Rapids
12 Stockton
13 Mount Pleasant
14 Ottumwa		 Communication Center
Des Moines
Des Moines
Atlantic
Atlantic
Storm Lake
Storm Lake
Cedar Falls
Cedar Falls
Cedar Falls
Cedar Falls
Cedar Rapids
Cedar Rapids
Fairfield
Fairfield		 Radio area
1
1
2
3
1
1
2
2
3
3
2
1
3
3
Besides local agencies on AID & LEA. There are some Federal agencies on the state radio system, they ID as "F-###". The 100 series seems to be the FBI, 200 series BATF, 300 series Dept of Agriculture.
Dept. of Public Safety Division of Criminal Investigation

Uses DPS radio system. Also 154.920 "Purple", as while as other low power simplex channels. There are base stations at resident agent offices and at resident agents office on site at Casinos, Horse & Dog Racing Tracks. May have be capable of operation on local agencies systems. ID on state system as "I-###".
State Fire Marshall

700 series on the state radio system
Dept. of Natural Resoures

155.595 is used at State Parks, and by State Game Wardens. C1## are State Park Rangers. C2## are statewide personnel, they are only use the 155.595. Game Wardens also use the state radio system with a C3## series. The DNR licensed several low-power frequencies. What are used for is unknown. I made a map showing which frequencies are used in which county by the DNR
Department of Corrections

Other than using the statewide state agencies channel of 154.995 for mobiles, 453.375 simplex handhelds, and local prison frequencies. Nothing is known about this agency use of the state radio system.
Fort Dodge Prison is on the Racom TRS.
Department Of Transportation

159.180 (159.060) F1 (most traffic is now digital)
159.195 (159.105) F2 (most traffic is now digital)
159.165 (159.075) F3 (most traffic is now digital)
158.985 (155.985) F4 (most traffic is now digital)
New channels are licensed:
151.1900 ( ) F? (traffic is digital)
159.3600 (156.045) F? (traffic is digital)
151.0850 (159.465) F? (traffic is digital)

most radios are capable of simplex operation on the repeater output.

155.970 SC weigh scales & enforcement
155.460 enforcement
47.280 unknown use

DOT has at least one garage in each county, depending on the state road system. While F1 & F2 are use the most, F3 & F4 are used when an interference problem or busy channels exist. 155.970 is used only at Weigh Scales or by Enforcement Officers. Maintenance trucks ID with the name of the garage and one or two digits. District personnel ID with the District number and two digits. Most of agency has switched to digital.

Enforcement Officers use the DPS state radio system and use "T-###" as ID, they drive marked blue Crown Victoria or Caprices with full light-bars on top. They have not been heard on the actual DOT radio system, 155.970 & 155.460 replaces 155.445 & 155.505 in their radios. Repeaters on 151.340 & 151.175 are being licensed in areas of the State. The licenses mention DOT Enforcement as the office of contact.
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this page revised December 21, 2002
copyright 1997-2002 by michael w. scheel
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