Disaster Communications Service

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Disaster Communications ServiceSan Dimas & Walnut / Diamond Bar Stations

Copyright © 2011 Los Angeles County Disaster Communications Service

We have the unique situation that we support 2 stations, San Dimas & Walnut / Diamond Bar. Originally DCS was assigned to the old San Dimas Station and then were reassigned to the Walnut / San Dimas Station in 1987. When Walnut / San Dimas Station opened, San Dimas Station was downgraded to a sub station. In 2000, Sheriff Baca decided to upgrade the San Dimas Station to a full service station again. At that point in time, the Walnut / San Dimas Station was renamed as the Walnut / Diamond Bar Station. It was a natural fit for our DCS team to support both stations. In 2006, the current San Dimas Station opened which included a dedicated DCS radio room to compliment the one that we already have at the Walnut Station.

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San Dimas StationSan Dimas Station


We’ll start off with a brief overview the San Dimas Station.

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San Dimas StationSan Dimas StationSan Dimas Sheriff's Station is located in San Dimas Sheriff's Station is located in

the eastern portion of Los Angeles the eastern portion of Los Angeles County, adjacent to the cities of La County, adjacent to the cities of La

Verne and Pomona. The station serves Verne and Pomona. The station serves the City of San Dimas and the the City of San Dimas and the

unincorporated communities of Covina, unincorporated communities of Covina, Azusa , Glendora, La Verne, and Azusa , Glendora, La Verne, and

Claremont. The station also provides Claremont. The station also provides law enforcement for a large portion of law enforcement for a large portion of the Azusa Canyon and Mount Baldy the Azusa Canyon and Mount Baldy areas of the Angeles National Forest areas of the Angeles National Forest

(State Route 39, Glendora Mountain & Ridge Roads). (State Route 39, Glendora Mountain & Ridge Roads). Copyright © 2011 Los Angeles County Disaster Communications Service

San Dimas Sheriff's Station is located in the eastern portion of Los Angeles County, adjacent to the cities of La Verne and Pomona. The station serves the City of San Dimas and the unincorporated communities of Covina, Azusa , Glendora, La Verne, and Claremont. The station also provides law enforcement for a large portion of the Azusa Canyon and Mount Baldy areas of the Angeles National Forest (State Route 39, Glendora Mountain Rd. & Glendora Ridge Rd.).

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San Dimas StationSan Dimas StationThe original station opened in 1927 as The original station opened in 1927 as SubSub--Station 8 located in a converted Station 8 located in a converted

house. The second San Dimas Station house. The second San Dimas Station opened in 1950 on the site of the original opened in 1950 on the site of the original

station. The station’s services were station. The station’s services were downgraded upon the opening of Walnut downgraded upon the opening of Walnut

Station in 1987. San Dimas Station Station in 1987. San Dimas Station regained it’s full service status in January regained it’s full service status in January

2000. End of Watch of the second San 2000. End of Watch of the second San Dimas Station was in December of 2005. Dimas Station was in December of 2005. The current San Dimas Station officially The current San Dimas Station officially

opened in January 2006.opened in January 2006.Copyright © 2011 Los Angeles County Disaster Communications Service

The original station opened in 1927 as SubThe original station opened in 1927 as Sub--Station 8 located in a converted house. Station 8 located in a converted house. The second San Dimas Station opened in 1950 on the site of the The second San Dimas Station opened in 1950 on the site of the original station. original station. The station’s services were downgraded upon the opening of WalnuThe station’s services were downgraded upon the opening of Walnut / San Dimas t / San Dimas Station in 1987. San Dimas Station regained it’s full service sStation in 1987. San Dimas Station regained it’s full service status in January 2000. tatus in January 2000. End of Watch of the second San Dimas Station was in December of End of Watch of the second San Dimas Station was in December of 2005. The 2005. The current San Dimas Station officially opened in January 2006.current San Dimas Station officially opened in January 2006.

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San Dimas Station CaptainSan Dimas Station Captain

Capt. Joseph S. HartshorneCapt. Joseph S. Hartshorne


The station captain of San Dimas Station is Capt. Joseph S. Hartshorne

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San Dimas Station DCS Radio RoomSan Dimas Station DCS Radio Room


Here is a photograph of the San Dimas Station DCS Radio Room. This photo was taken during a training exercise with the City of San Dimas and LASD.

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Walnut / Diamond Bar StationWalnut / Diamond Bar Station


On to a brief overview of the Walnut / Diamond Bar Station.

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Walnut StationWalnut Station

Walnut / Diamond Bar Station service Walnut / Diamond Bar Station service area is spread out over 45.2 square area is spread out over 45.2 square

miles, encompassing the contract cities miles, encompassing the contract cities of Diamond Bar and Walnut, and the of Diamond Bar and Walnut, and the

unincorporated area of Rowland unincorporated area of Rowland Heights. This station provides law Heights. This station provides law enforcement services, including all enforcement services, including all patrol, investigative and custodial patrol, investigative and custodial operations, to more than 148,000 operations, to more than 148,000

residents. This station opened in 1987residents. This station opened in 1987


Walnut / Diamond Bar Station service area is spread out over 45.2 square miles, encompassing the contract cities of Diamond Bar and Walnut, and the unincorporated area of Rowland Heights. This station provides law enforcement services, including all patrol, investigative and custodial operations, to more than 148,000 residents. This station opened in 1987

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Walnut Station CaptainWalnut Station Captain

Captain David HalmCaptain David Halm


The station captain of Walnut / Diamond Bar Station is Capt. David Halm.

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Disaster Communications ServiceSan Dimas & Walnut / Diamond Bar StationsWalnut Station DCS Radio RoomWalnut Station DCS Radio Room


Here is a photograph of the Walnut / Diamond Station DCS Radio Room during one of our Monday night nets.

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Nearby HospitalsNearby HospitalsHospitals / Medical centers near San Dimas:Hospitals / Medical centers near San Dimas:San Dimas Community Hospital San Dimas Community Hospital –– San DimasSan DimasEast Valley Hospital Medical Center East Valley Hospital Medical Center -- GlendoraGlendoraFoothill Presbyterian Hospital Foothill Presbyterian Hospital –– GlendoraGlendoraPomona Valley Hospital Medical Center Pomona Valley Hospital Medical Center -- PomonaPomona

Hospitals / Medical centers near Walnut:Hospitals / Medical centers near Walnut:Charter Behavioral Health System of Southern California Charter Behavioral Health System of Southern California --Covina Covina Citrus Valley Medical CenterCitrus Valley Medical Center –– InterInter--Community Campus Community Campus --Covina Covina Citrus Valley Medical Center Citrus Valley Medical Center –– Queen of the Valley Campus Queen of the Valley Campus ––West CovinaWest Covina


Hospitals / Medical centers near San Dimas:San Dimas Community Hospital – San DimasEast Valley Hospital Medical Center - Glendora Foothill Presbyterian Hospital – Glendora Pomona Valley Hospital Medical Center - Pomona

Hospitals / Medical centers near Walnut:Charter Behavioral Health System of Southern California – Charter Oaks area of Covina Citrus Valley Medical Center – Inter-Community Campus - Covina Citrus Valley Medical Center – Queen of the Valley Campus – West Covina

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Superior CourthousesSuperior CourthousesIn Our Service AreasIn Our Service Areas

West Covina CourthouseWest Covina Courthouse

Pomona CourthousePomona Courthouse


Nearby Superior Courthouses in our service areas are:West Covina Courthouse and the Pomona Courthouse

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Emergency Communications GroupsEmergency Communications GroupsIn Our Service AreaIn Our Service Area

Azusa Amateur radio Communications Emergency Azusa Amateur radio Communications Emergency Services Services –– AACESAACES

Diamond Bar Amateur Radio Society Diamond Bar Amateur Radio Society –– DBARSDBARS

Claremont Amateur Radio Disaster Service Claremont Amateur Radio Disaster Service –– CARDSCARDS

Glendora Emergency Amateur Radio Service Glendora Emergency Amateur Radio Service –– GEARSGEARS


Emergency communications groups in our service area are:

Azusa Amateur radio Communications Emergency Services – AACESDiamond Bar Amateur Radio Society – DBARSClaremont Amateur Radio Disaster Service – CARDSGlendora Emergency Amateur Radio Service – GEARS

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DCS Communications VanDCS Communications Van

80H80H


On to the DCS communications van affectionately known as 80-Henry. Our DCS team was assigned this 2001 Ford E-350 van by Fleet Services in December 2006 as a replacement to our original DCS communications vehicle, which was known as 290-Henry, which was retired by Fleet due to parts availability and emissions issues.

Other DCS teams that have communications vehicles assigned are Industry Station (14) and Lost Hills Station (22).

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We started with a clean slate which enabled us to take a fresh look at how to setup the equipment and make improvements along the way. We started by evaluating our needs and goals, solicited donations where needed and installing the equipment. We got much needed support from the San Dimas and Walnut / Diamond Bar Sheriff’s Boosters Clubs. This is still an ongoing project and we are still adding equipment as needs and/or funds allow.

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Left hand picture: One of our work parties with the installation of the last of six antennas on the roof.Right hand picture: This is the overall view of the inside of the van. It’s Spartan but functional.

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Upper left picture: DCS provided relay communications at the MRA Recertification supporting SDMRT at Malibu Canyon State Park in 2010.Lower right picture: Some of our radio gear installed. Our capabilities includes 2-meter, 220, 440, HF and Sheriff’s 480 MHz.

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San Dimas Mountain Rescue TeamSan Dimas Mountain Rescue Team

Frequently, the San Dimas Frequently, the San Dimas Mountain Rescue Team Mountain Rescue Team

(SDMRT) calls upon DCS for (SDMRT) calls upon DCS for relay communications and relay communications and

other tasks deemed necessary other tasks deemed necessary during extended searches. during extended searches.

DCS has also has assisted the DCS has also has assisted the team during many of their team during many of their

training sessions along with training sessions along with maintenance and programming maintenance and programming

the team radios.the team radios.


Frequently, the San Dimas Mountain Rescue Team (SDMRT) calls upon DCS for relay communications and other tasks deemed necessary during extended searches. DCS has also has assisted the team during many of their training sessions along with maintenance and programming the team radios.

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Upper left picture: DCS was asked to clear a landing zone (LZ) for Air 5 at Cow Canyon Saddle in the Angeles National Forest during a recovery near the Mt. Baldy area.Lower right picture: This was a training exercise with SDMRT and search dog handlers at Bonelli Park.

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Upper left picture: One of the “Dry Run” training sessions with SDMRT at Malibu Canyon State Park in the spring 2010Lower right picture: The Command Post during a Mountain Rescue Association (MRA) Recertification two weeks later. DCS was heavily used for relay communications during this recertification exercise. Search and rescue teams from all over the state participated in this event.

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Upper right picture: During a slow moment shortly after sunrise, this picture was snapped at the end of Shoemaker Rd. in the Angeles National Forest. DCS was called out by SDMRT in the middle of the night to provide relay communications between the Command Post and the teams in the field.Lower left picture: DCS was invited to observe a SDMRT “Dry Run” swift water rescue training.

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Community RelationsCommunity Relations

DCS is frequently DCS is frequently called upon to called upon to display the DCS display the DCS Communications Van Communications Van at community events.at community events.


DCS is frequently called upon to display the DCS Communications Van at community events. This photo was taken at the San Dimas Sheriff’s Boosters Annual Car Show.

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Community RelationsCommunity Relations


Upper left picture: 80H on display at the San Dimas Station open house in 2007.Lower right picture: DCS was on hand for the San Dimas Fiftieth Birthday Party along the station volunteers and posse.

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Boosters ClubsBoosters ClubsBoth the San Dimas and Walnut / Diamond Bar stations Both the San Dimas and Walnut / Diamond Bar stations have very active Boosters Clubs. These organizations have very active Boosters Clubs. These organizations

provide financial support to the volunteer services at their provide financial support to the volunteer services at their respective stations. They help fund equipment purchases respective stations. They help fund equipment purchases

not provided by the Sheriff’s Department.not provided by the Sheriff’s Department.

Both the San Dimas Sheriff's Booster Club and the Walnut / Both the San Dimas Sheriff's Booster Club and the Walnut / Diamond Bar Sheriff's Booster Club conduct several Diamond Bar Sheriff's Booster Club conduct several fundraisers throughout the year ranging from Golf fundraisers throughout the year ranging from Golf

Tournaments to Car Shows. Tournaments to Car Shows.

DCS gratefully acknowledges the San Dimas and Walnut / DCS gratefully acknowledges the San Dimas and Walnut / Diamond Bar Sheriff’s Boosters Clubs for their support over Diamond Bar Sheriff’s Boosters Clubs for their support over

the years.the years.Copyright © 2011 Los Angeles County Disaster Communications Service

Both the San Dimas and Walnut / Diamond Bar stations have very active Boosters Clubs. These organizations provide financial support to the volunteer services at their respective stations. They help fund equipment purchases not provided by the Sheriff’s Department.Both the San Dimas Sheriff's Booster Club and the Walnut / Diamond Bar Sheriff's Booster Club conduct several fundraisers throughout the year ranging from Golf Tournaments to Car Shows. DCS gratefully acknowledges the San Dimas and Walnut / Diamond Bar Sheriff’s Boosters Clubs for their support over the years.

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This concludes this brief overview of the San Dimas and Walnut / Diamond Bar Station DCS team.

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