About Us -
The City of Seneca sits nestled in high Bear Valley near the base of the Blue Mountain Range. Sitting at almost 5000 ft, Seneca is known for its record low temperatures (-54 degrees!) throughout the Fall, Winter and Spring months. This small community of less than 200 people has great pride in its town and relishes the remote and personal feel that Seneca offers it's residents. At any given time of the year, there are groups of children riding bikes and playing throughout the town - so we ask that you slow down, watch for children, and enjoy your visit to our beautiful valley.
The Seneca post office was established in 1895 and the city named by postmistress Minnie Southworth for her brother-in-law, prominent Portland judge Seneca Smith. While early homesteaders moved into the valley in the late 1800's, Seneca only began growing in 1929 when it became the northern terminus of the now-vacated Oregon and Northwestern Railroad, owned by the Edward Hines Lumber Company, which extended south to Burns. That time marked the beginning of large-scale shipping of Ponderosa Pine logs to the Hines sawmill in Hines from Seneca and the surrounding National Forest. The company established a planing mill and railroad shops in Seneca, and it became essentially a company town. In 1940 Seneca's population was 275. Logging in the area began to decline in the 1970's, and the Hines company ceased operations of its lumber mills and railroad in 1984. The town was incorporated as a city on August 6, 1970 as lumber company control began to wane.
What's Going On?!
Click the hand to see current notices.
Shirttail Creek Subdivision
The Shirttail Creek Subdivision lots have awesome views of Bear Valley, the Strawberry Mountains, the Silvies River, and the Bear Valley Meadows Golf Course.
The City of Seneca has initiated the sale of the lots of the Shirttail Creek Subdivision via a Request For Proposal (RFP). The details and information on submitting your proposal are available through Seneca City Hall at 541-542-2161, email requests to: , and by clicking here.
2014 Wastewater Facilities Plan
The Construction of the Facility has been officially awarded to R & G Excavating, Inc.
Work is already under way.
Fall of 2019
The City of Seneca was awarded the Community Development Block Grant (CDBG) from the State of Oregon for the 2014 Wastewater Facility Plan. This plan enables the town of Seneca to move it's Wastewater Facility from it's current location to a more sustainable location on the other side of the Silvies River and to enlarge it's current holdings.
The Engineering contract was awarded to HECO Engineering (formerly Holliday Engineering) and work is underway. Surveyors were out in October and plans are being worked on.
The short version of the Project Description is now available including the current project map. If you have any further questions about the project, feel free to contact the Seneca City Office at 541-542-2161 or
A copy of the "Early Notice and Public Review of a Proposed Activity in a Floodplain and Wetlands" document is available and will be published in the March 28th, 2018 edition of the Blue Mountain Eagle newspaper.
Stay Tuned for More Information!