Santeetlah Hydroelectric Development
Why it's listed
Built between 1926 and 1928 on the Cheoah and Little Tennessee Rivers in Graham County, the Santeetlah Hydroelectric Development supplied power to Alcoa's aluminum works in Tennessee. Its central dam combines gravity and arch construction and stands 212 feet high. The powerhouse, housing two Francis turbines with a combined capacity of 45 MW, is built of concrete and Flemish bond brick with cast concrete Doric capitals and terra cotta trim. A five-mile pipeline and tunnel system carries water from the reservoir to the powerhouse, ending at a steel surge tank about 550 feet above the river. The complex is significant for its engineering, since the dam was among the first in the country to control concrete quality with water-cement ratio measurements and vibratory tampers. Its industrial architecture and the retention of original features across the dam, gatehouse, and powerhouse add to its value. The mountain setting has changed little since completion, and the facility remains part of Alcoa's regional hydroelectric system.
Significance in brief: The nomination argues the development is significant under criterion A for its role in the industrial development of the region and its power supply to Alcoa's aluminum plants, and under criterion C for the engineering of its dam, which was among the first in the country to use water-cement ratio and vibratory tampers for concrete quality. The powerhouse is described as a notable Classical Revival industrial building that retains its original character.
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 04000466, listed May 21, 2004. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | Dam-Hwy NC 1247, Powerhouse-1277 Farley Branch Rd., Robbinsville |
|---|---|
| County | Graham County |
| Listed | May 21, 2004 |
| Reference number | 04000466 |
| Resource type | District |
| Period of significance | 1928-1953 |
| Architect / builder | BUILDER: Power & Engineering Group of Alcoa, Pittsburgh, PA |
| Architectural style | Classical Revival |
| Criteria |
|
| Areas of significance | Engineering, Architecture, Industry |
| Level of significance | Local |
| Status (as stated in the nomination) | The primary structures retain a high degree of original design and the surrounding landscape has little residential or commercial development. Some later additions, including a 1990 rooftop equipment building on the surge tank building, are noted as non-contributing. |
| Acreage | 397 |
| Coordinates | 35.39134, -83.87281 (NPS GIS) |
What listing means for this property
This is a historic district. Buildings within its boundary are either contributing (they add to the district's significance) or non-contributing. Owners of contributing income-producing buildings can claim the 20% federal rehabilitation tax credit; homeowners should look at state credits. National Register districts impose no design review by themselves; a local historic district ordinance, if one exists, does (the difference explained).
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 04000466.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7420114
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.