Sonoma County Public Works DMR

officer_415

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Sonoma County has built out a 9-site DMR system for their Department of Public Infrastructure. Anyone in the area with DSD+, time to go to work ;)



For Immediate Release

New radio system supports rural communities, county operations in streamlined emergency response and recovery​

Santa Rosa, CA | March 28, 2024

The Board of Supervisors today announced the implementation of a new digital mobile radio system and support for a neighborhood effort designed to enhance communication among county officials, community groups and the Department of Public Infrastructure for greater efficiencies during disaster response and recovery.
The Department of Public Infrastructure has partnered with Neighborhood Auxiliary Communications Services to train users and distribute 500 handheld radios, which operate within the General Mobile Radio Service using a network of 14 repeaters that facilitate communications covering approximately 80 percent of the county. The repeaters are also being used by community groups including Citizens Organized to Prepare for Emergencies and Community Emergency Response Teams. To date, county officials have trained more than 200 community members on how to use the radios in the communities of Villa Grande, Hacienda, Monte Rio, Rio Nido, Cloverdale, Occidental and Guerneville.
“We know from experience that communications during natural disasters can be limited, intermittent or cut off completely, especially in rural communities,” said Supervisor David Rabbitt, chair of the Board of the Supervisors. “This new radio system will streamline communication and mitigate safety risks – for first responders trying to call out evacuations, for county road crews working in isolated areas to remove hazard trees and debris, and for our community members who lose water, power and gas and whose safety depends on our ability to respond effectively.”
The Department of Public Infrastructure also has 85 handheld transceivers and 144 digital mobile radios to enhance staff members’ ability to respond in the field and ensure work safety. The exclusive network relies on nine repeaters installed at Pine Mountain, Moonraker, Meyer’s Grade, Bodega, Mount Barham, Siri Ridge, Mount Jackson, Sleepy Ridge, and Sonoma Mountain. Mobile and handheld radios have been installed on department vehicles and assigned to employees. The Sonoma County Sheriff’s Office coordinated on the installation and programming of the radios, which can be used as individual or group channels, as needed.
The cost of the new communications system is $2.3 million and was funded by a combination of PG&E settlement funds from the 2017 Sonoma Complex fires and county roads funding. For more information about the county’s new digital mobile radios and Neighborhood Auxiliary Communications Services, please contact the Department of Public Infrastructure at (707) 565-2550 or email spi@sonoma-county.org.

Media Contact:
Dan Virkstis, communications specialist
publicaffairs@sonoma-county.org
707-565-3040
 

inigo88

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Here’s what I got from East Petaluma:

DMR Tier III (likely Motorola Capacity Max, but need DSD+ to confirm)

Network 1(hex)

Site 1: 460.2875cc, color code 1
Site 2 (Sonoma Mountain): 460.3625cc, color code 1

Unknown location for site 1, came in weak in Petaluma.
 

officer_415

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DSD+ is showing me the following for 460.2875, I think it's Sonoma Mtn:
TIII Site:S2-1.2 DCC:1

460.3625 might be Sleepy Ridge
 
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nokones

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Here’s what I got from East Petaluma:

DMR Tier III (likely Motorola Capacity Max, but need DSD+ to confirm)

Network 1(hex)

Site 1: 460.2875cc, color code 1
Site 2 (Sonoma Mountain): 460.3625cc, color code 1

Unknown location for site 1, came in weak in Petaluma.
If the site is off of Meyers Grade Road, more than likely the site is Seaview Ridge. The County has been at this site with facilties from their low-band VHF days. I know that the County has a microwave presence at Seaview.
 

officer_415

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If the site is off of Meyers Grade Road, more than likely the site is Seaview Ridge. The County has been at this site with facilties from their low-band VHF days. I know that the County has a microwave presence at Seaview.

The Meyers Grade site is at 16001 Meyers Grade Rd, about half a mile away from the Seaview Ridge site.

The sites we're talking about are receivable in Petaluma/Marin, so definitely not Meyers Grade or Seaview.
 

inigo88

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DSD+ is showing me the following for 460.2875, I think it's Sonoma Mtn:
TIII Site:S2-1.2 DCC:1

460.3625 might be Sleepy Ridge

Agreed. To go back on my previous post, I think where I was at in East Petaluma the Sonoma mountain site reception was shadowed by the foothills and I was likely getting sleepy ridge.

It also looks like the site numbers and network ID I pulled from the Uniden SDS100 are not accurate (I haven’t updated the firmware since I got the scanner). The SDS may do fine on the Motorola Tier III Capacity Max, but since this is a regular DMR Tier III system with size/area/site fields that the SDS doesn’t decode yet, I would trust DSD+ instead.
 

w6cjq

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They mention GMRS radio in here, second paragraph, not sure why. Also mention a digital system toward the end of the article not sure if this is related to the GMRS system. Any ideas ?
 

officer_415

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They mention GMRS radio in here, second paragraph, not sure why. Also mention a digital system toward the end of the article not sure if this is related to the GMRS system. Any ideas ?

The press release appears to be talking about two different projects:

1. 500 GMRS radios for Neighborhood Auxiliary Communications Services (COPE and/or CERT)
2. 85 portables and 144 mobiles for the Department of Public Infrastructure (9-site DMR system)
 
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