Portland Brownstone Quarries
Added to the National Register in 2000, and a National Historic Landmark.

The record
| Property type | Site |
| Address | Brownstone Ave., and Silver St., Portland, CT |
| County | Middlesex County |
| Listed | May 16, 2000 |
| Reference number | 00000703 |
| Designations | National Historic Landmark |
The nomination form, the document that argues why this place matters, is in the National Archives: Read the nomination ↗
Visiting
| Address | Brownstone Ave., and Silver St., Portland, CT |
| Coordinates | 41.5756° N, 72.6433° W · Directions ↗ |
Explore
Map
Nearby in Middlesex County
Local history books for Middlesex County
We earn a small commission if you buy through these links. It does not change what we list.
- Hidden History of Middlesex County, ConnecticutRobert Hubbard and Kathleen Hubbard, 2018Find at Bookshop.org

Guidebooks to historic places and travel in Connecticut
Titles come from Open Library's catalog, matched by subject heading or by title.
Reference
Questions people ask
When was Portland Brownstone Quarries listed on the National Register?
May 16, 2000. It is also a National Historic Landmark, the higher of the two designations.
Source: National Park Service
Where is Portland Brownstone Quarries?
Brownstone Ave., and Silver St., Portland, Middlesex County, Connecticut.
Source: National Park Service
Where is the nomination form for Portland Brownstone Quarries?
The National Archives holds the nomination form, the document that made the case for listing.
Source: National Archives
Sources
Name, location, type and dates come from the National Register office's spreadsheet of listed properties, because the Park Service's spatial data does not carry this listing. The map point comes from Wikidata. Construction date, architect, style, photograph and encyclopedia link come from Wikidata and Wikimedia Commons, matched on reference number 00000703. Nothing here is transcribed by hand. The nomination form and photographs ↗ at NPGallery are the original nomination as filed with the National Park Service, and the form is often the best description of the place.