{"nrhp_refnum":"80000502","name":"Middlefield-Becket Stone Arch Railroad Bridge District","other_names":[],"category":"district","location":{"address":"Middlefield vicinity","address_restricted":false,"city":"Middlefield","county":"Hampshire County","state":"MA","lat":42.30685300000005,"lon":-73.01786662407156,"geom_source":"nps_gis"},"listed_date":"1980-04-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A railroad district of ten bridges and the connecting right-of-way, about 3.7 miles long, crossing the West Branch of the Westfield River between Middlefield and Becket and through Chester, Massachusetts. Bridges date from 1840, c.1866, 1912 and 1928.","why_significant":"The district is significant for engineering and transportation. It represents several generations of arched bridge construction, from solid stone to hybrid stone and concrete to reinforced concrete. The earliest bridges were built by the Western Railroad, a key link in the first trunk line completed in the United States, under Chief Engineer George Washington Whistler.","narrative":"Ten railroad bridges and their right-of-way span a 3.7 mile stretch of the West Branch of the Westfield River between Middlefield and Becket, passing through Chester. Nine are masonry and one is a steel deck truss girder. The three oldest, granite single-arch bridges from 1840-41, were built by the Western Railroad for a single track and rise about 70 feet above the water. Later bridges include a double granite arch from about 1866, a hybrid granite and concrete bridge widened in 1912, and reinforced concrete arches from 1912, 1913 and 1928. Two of the 1928 spans replaced stone bridges damaged in the 1927 flood. The district is significant for engineering and for its link to the Western Railroad, part of the first trunk line completed in the United States. Chief Engineer George Washington Whistler supervised construction through the rugged Summit Division, the most difficult and expensive section of the line. The bridges show the progression from stone to concrete construction.","period_of_significance":"1840-1928","architect_builder":"George Washington Whistler","architectural_style":null,"criteria":[],"status_note":"Mixed: bridges #1, #2, #4, #7 and #8 carry active rail use, while the three 1840 stone arches (#3, #5, #6) have not carried rail traffic since 1912. The three 1840 bridges have lost some parapet stones.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:11:54.57754-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/0/7955/63795500/content/electronic-records/rg-079/NPS_MA/80000502.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/80000502/48d4dbe7fd-800.webp","url_1600":"https://nationalhistoricalregister.com/media/80000502/48d4dbe7fd-1600.webp","licence":"CC BY 3.0","author":"John Phelan","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bridge_over_West_Branch_of_Westfield_River_near_Middlefield_Rd,_Chester_MA.jpg\" rel=\"noopener\">John Phelan</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\" rel=\"license noopener\">CC BY 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Bridge_over_West_Branch_of_Westfield_River_near_Middlefield_Rd,_Chester_MA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63795500","wikipedia":"https://en.wikipedia.org/wiki/Middlefield%E2%80%93Becket_Stone_Arch_Railroad_Bridge_District","wikidata":"https://www.wikidata.org/wiki/Q6841783"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/hampshire-county/middlefield-becket-stone-arch-railroad-bridge-district-80000502/"}