Colvin Run Mill
Why it's listed
Colvin Run Mill is a four-story brick and frame grist mill near Great Falls, Fairfax County, Virginia, built between about 1810 and 1820. Its machinery follows the design of Oliver Evans, who devised a continuous, automated system moving grain and meal by conveyor belts, buckets and hoists, all driven by an overshot waterwheel. Over its history the mill served local farmers and later became one of the area's earliest roller mills under the Millard family, who ran it until 1934. Relocation of Route 7 cut off its water supply, and the mill declined until the Fairfax County Park Authority acquired it in 1965. Restoration from 1969 to 1975 involved replacing about 75,000 bricks, stabilizing the foundation and rebuilding the millrace. The park also includes a miller's house, a dairy shed used as a carpentry shop, and a moved c. 1890 general store. The restoration earned architectural awards in 1973 and 1975.
Significance in brief: The mill was built according to the milling principles of inventor Oliver Evans, whose continuous, automated process helped bring the production line to America. It represents the merchant and neighborhood milling that was central to Northern Virginia's agriculture and economy. Its careful restoration won architectural preservation awards in 1973 and 1975.
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 77001487, listed August 16, 1977. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | S of Great Falls at 10017 Colvin Run Rd., Great Falls |
|---|---|
| County | Fairfax (city and county) |
| Listed | August 16, 1977 |
| Reference number | 77001487 |
| Resource type | Building |
| Period of significance | 1800-1899, 1900- |
| Architect / builder | unknown |
| Areas of significance | Engineering, Agriculture |
| Level of significance | State |
| Status (as stated in the nomination) | Restored 1969-1975 and in public park and museum use; condition listed as excellent. The miller's house hosts exhibitions, the dairy shed serves as a carpentry shop, and the general store is a museum and functioning post office. |
| Acreage | 7.5 |
| Coordinates | 38.96839, -77.29264 (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 77001487.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5150311
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.