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County Route Shield

County Sign Route A28

[Click here for a key to the symbols used. Some county routes were constructed with federal funds. These routes are indicated as FAP (Federal Aid Primary), FAU (Federal Aid Urban), or FAS (Federal Aid Secondary). If no funding source is shown, no federal funds were used. Note that while some segments seem to have the same attributes, they may differ in the county-local road number assigned to the segment, or in the Caltrans Map Sheet number.]

Routing Routing

Cty Rte A28Montague-Ager Road, from Siskiyou County Sign Route A12 in Grenada to Copco Road near Hornbrook via Montague. This appears to consist of multiple segments:

  1. Montague-Grenada Road from Siskiyou County Sign Route A12 (99-97 Cutoff) to Scobie Street.
  2. 11th Street within the city limits of Montague from Scobie Street to Oregon Slough Road
  3. Montague-Agar Road, also known as Agar Road, from Oregon Slough Road to to Copco Road.

History and Signage Information History and Signage Information

This route appears to have been defined post-1983, because it wasn't in the Caltrans records sent to me.

Tom Fearer, in the Gribblenation Blog "Siskiyou County Route A28; connecting the Southern Pacific Railroad sidings", provides additional history, photos, and maps. The following is excerpted from the blog:

Siskiyou County Sign Route A28 which serves as a frontage facility to the numerous former Southern Pacific Railroad sidings of Shasta Valley.  A28 consists of the rail frontage roads of: Montague-Grenada Road, 11th Street in Montague, Montague-Ager Road, Ager Road, and Copco Road.  A28 serves the heart of Shasta Valley by providing direct highway access to the communities of; Grenada, Montague, Ager, and Hornbrook. The roads that make up County Sign Route A28 are very old and were established by the Southern Pacific Railroad when sidings were plotted out in Shasta Valley circa 1886-87.  The communities of; Grenada, Montague, Ager, and Hornbrook were all plotted by the Southern Pacific as frontage facilities along it's then new line in Shasta Valley. The 1909 San Francisco Motor Club Map of the Yreka Area shows two routes from Yreka north towards the State Line.  The primary highway north of Yreka is shown to follow what is now Yreka-Ager Road and much of Siskiyou County Sign Route A28 towards Hornbrook.  The secondary road is shown to follow what is now Anderson Grade Road from Yreka towards Hornbrook. By 1917, LRN 3 is shown following what is now Anderson Grade Road towards Yreka instead of utilizing future County Sign Route A28 through Shasta Valley. The 1935 California Division of Highways Map of Siskiyou County shows most of future County Sign Route A28 (from Grenada to Ager) as a major County Highway. 

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Acronyms and Explanations:

Back Arrow CR A27 Forward Arrow CR A29

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