Adin Supply Company
Also known as: Big Valley Co-op Store
Why it's listed
Adin Supply Company is a wood-frame general store with a rear warehouse on Main Street in Adin, Modoc County, California. The store was probably built in early 1906 after the Big Valley Co-operative Association's first store burned in 1905. It measures about 50 by 80 feet and has horizontal siding, a gabled corrugated metal roof, and a broad front of display windows with three recessed entrances. Inside are wood floors, chamfered posts, an overseer's platform, and original display cases. The warehouse sits about 130 feet behind and was once linked to the store by a tramway. The business passed from the co-operative to the Adin Supply Company in 1913, and George J. Harper ran it from 1920 until 1946. It is recognized as Adin's oldest and largest retail building and the main survivor of a once busy commercial district. It still functions much as it did historically.
Significance in brief: The nomination argues it is the oldest and largest retail facility in Adin and the most conspicuous survivor of the town's turn-of-the-century commercial district. It has operated as a general store in much the same way from its start through the end of the historic period. As the rest of the commercial district disappears, it increasingly serves as the reminder of the town's commercial past.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 97000028, listed February 7, 1997. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | W side of Main St. between Center and McDowell Sts., Adin |
|---|---|
| County | Modoc County |
| Listed | February 7, 1997 |
| Reference number | 97000028 |
| Resource type | Building |
| Period of significance | 1906-1946 |
| Architect / builder | Unknown |
| Architectural style | No Style |
| Criteria |
|
| Areas of significance | Commerce |
| Level of significance | Local |
| Status (as stated in the nomination) | Still operating as a department/general store, with only minor alterations since 1946 apart from changes to the awning. |
| Acreage | 0.9 |
| Coordinates | 41.19682, -120.94462 (NPS GIS) |
What listing means for this property
For an income-producing building, listing (individually or as a contributing building in a district) is the gateway to the 20% federal rehabilitation tax credit on qualified rehabilitation costs, often stackable with state credits. Work claiming the credit must follow the Secretary of the Interior's Standards and be approved in advance.
Listing does not restrict a private owner acting without federal money or permits; where federal funding or licensing is involved, Section 106 review applies.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 97000028.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q85739803
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.