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Old 04-26-2011, 11:21 AM
oregontreehugger's Avatar
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Question ODOT Frequency Listing / Use

I pulled all the FCC records licensed to ODOT last night and compared them against what's listed in the RRDB. They have a few on VHF lowband (east of the Cascades) and on UHF (probably links), along with several AM broadcast highway advisory radio stations. Still, their meat and potatoes is the VHF highband. The below VHF frequencies in bold are not accounted for in the DB (except for the HEAR Net).

ODOT FCC Listings

Some licenses had very descriptive information, so I placed that next to the frequency. Planning to put these all in the scanner and see what turns up. I'm sure some of them are inputs to known repeaters, but just not listed yet.

Also, ODOT has a license on 155.340 which is the HEAR (ambulance-to-hospital) net. My best guess is they are licensing this for statewide agency use. It comes back on WNXQ733 for 1,000 mobile units at 40 watts power, with a operating radius of 483 kilometers, centered in Deschutes County.

If anyone wants to chime in with info, it's greatly appreciated! Hopefully we can get the ODOT database updated.

150.9950
151.0100
151.0250
151.0400
151.0550
151.0700
151.0850
151.1000
151.1150
151.1300
153.7850
153.8000
153.9950
154.0850

154.1000
154.8525 Flagging Ops
155.1450
155.3400 OR HEAR Net

155.7450
155.8200
156.0450
156.0600
156.0750
156.1200
156.1350
156.1650
156.1950
158.7450
158.8050
158.8200
158.9850
158.9925

159.0000
159.0075 Hwy 20 Telm Data
159.0450
159.0750
159.1200
159.1650
159.1725 Hwy 97 Telm Data

159.1800
159.1950

Last edited by oregontreehugger; 04-26-2011 at 1:05 PM..
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Old 04-26-2011, 3:51 PM
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Okay, I compared the FCC listings to the ODOT District Maps available on their web site here, as well as the current RRDB listings. District 7 has two pairs of repeater frequencies, I am not sure which RX pairs with which TX frequency.

RX TX User
----------------------------------
159.000 151.130 District 1 - Clatsop / Tillamook Co.
151.070 156.075 District 2A - Columbia / Washington Co. / W. Portland
154.100 153.800 District 2B - Multnomah / Clackamas Co. / E. Portland
155.820 150.995 District 2C - Clackamas / Hood River / E. Multnomah Co.
156.135 159.195 District 3 - Marion / Yamhill / Part: Polk, Linn, Lane Co.
151.025 159.075 District 4 - Lincoln / Polk / Benton / Linn Co.
158.745 151.010 District 5 - Lane Co. / Eugene
000.000 000.000 District 6 - Does Not Exist
159.120 151.115? District 7 - Douglas / Coos / Curry Co. (unknown which input)
156.060 159.165? District 7 - Douglas / Coos / Curry Co. (unknown which input)
158.820 151.055 District 8 - Jackson / Josephine / Part: Klamath Co.
156.045 159.045 District 9 - Wasco / Sherman / Gilliam / Part: Wheeler, Morrow Co.
156.060 151.100 District 10 - Jefferson / Crook / Deschutes / Part: Klamath, Lake, Wheeler Co.
151.070 159.195 District 11 - Klamath / Lake Co.
151.085 156.075 District 12 - Morrow / Umatilla / Part: Grant, Wheeler Co.
156.165 159.180 District 13 - Union / Wallowa / Baker Co.
154.085 151.055 District 14 - Grant / Malheur / Harney / Part: Baker Co.

This frequency repeater pair pops up along the Coos and Curry County coastline with many transmitter sites. I am guessing this is for better coverage along the south coast.
RX TX User
----------------------------------
158.805 156.045 District 7 - Unknown (Better S. Coast Coverage?)

The following frequencies pop up as mobile-only transmitters under some of the various FCC licenses. Most frequencies appear to be independent of any repeater pairs and mobile-only, so I am thinking these are used for tactical or flagging channels, depending on the district: 151.025, 151.040, 151.070, 151.085, 155.745, 158.745, 158.820.

The following frequencies show up as part of "Road & Weather Information System" data transmitters limited to 5 watts: 158.9925 (Hwy 26 x Hwy 216), 159.0075 (Hwy 20 x Hwy 22), 159.1725 (Hwy 97 x Hwy 197).

The following frequency was labeled as for "Flagging Operations" and has only mobile transmitters: 154.8525

The following frequencies are licensed to a specific area. No idea what these are being used for; possibly flagging or work crew operations:
153.995 Tillamook / Nehalem Area - Mobiles Only
156.120 Salem Area - Mobiles Only

The following frequencies show up as independent sites near difficult mountain passes, so I am pretty sure these are in use for mountain operations, especially in the winter. Some have repeaters, some are just fixed base and mobiles licensed.
RX TX User
----------------------------------
153.785 Hwy 20 - NE Lake County
153.785 Walker Mtn. - Klamath County
155.145 Sisters Area
155.745 Hwy 6 - Mt. Wilson, E. of Tillamook
156.045 151.115 I-5 Mt. Ashland / Siskiyou Summit (confirmed)
156.075 Hwy 20 - W. of Vale, near Coyne Ridge
156.195 159.180 Hwy 26 - Government Camp / Mount Hood Area
156.240 151.055 I-5 - Mt. Sexton (simul. of 158.820 District 8 traffic.)(confirmed)
158.985 Hwy 395 - S. of Ukiah, near Bridge Creek
159.045 Hwy 95 - Jordan Valley
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Old 04-26-2011, 4:52 PM
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Great work, sounds like what I am working on with OSP.

Although your search turned up a number of good licenses, a better search would be directly from the ULS for FRN 1559632 -- the licensee name may not always be Oregon Dept of Trans, but the FRN should be the same for all of them. The results of such a search are in the attached zip file.

As soon as we get good descriptions for all of them I can get them in the database. Thanks for your hard work and effort!
Attached Files
File Type: zip UL20113261747319.zip (102.2 KB, 70 views)
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Last edited by joescanner; 04-26-2011 at 4:53 PM.. Reason: added results from a search
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