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Bellows Falls Tunnel
The Bellows Falls Tunnel is a railroad tunnel located in center of the Village of Bellows Falls within the Town of Rockingham, Vermont, adjacent to the Connecticut River, and is currently owned and operated by the New England Central Railroad (NECR). The Vermont Valley Railroad originally constructed the tunnel in 1851. Partially cut through solid rock, the tunnel was built with rough-cut stone blocks, where each portal was decorated with radiating voussoirs around their horseshoe shaped arches. The stone blocks average about 18 inches deep as observed at the tunnel portals. Record information available from the NECR would indicate that a separate support system exists above the masonry tunnel supporting the hotel building to the north of the Bridge Street roadway〔(New England Central Railroad ~ Double Stack Clearance Study ) ~ Work Order #11, Appendix: Section 9, Vermont Agency of Transportation, Rail & Aviation Division, January 1999〕 which is also directly above, and crosses perpendicular (east/west) to the tunnel below.
The tunnel runs in a north/south direction and is located at Milepost 144.56 of the NECR connecting the Canadian National (CN) line in Canada to CSX and other rail lines in Massachusetts.
==Tunnel Dimensions==
The tunnel is 278 feet long, extending from the north side of Mill Street to within 157 feet of the Bellows Falls Canal Bridge. As of August 2007 the vertical clearance of the tunnel was (20 ft. 8 in.). There is a slight down grade from south to north. There is a curve to the west (looking south), just south of the tunnel and its grade crossing. The track is tangent from the grade crossing through the tunnel and over the half-thru girder bridge. To the northwest of the tunnel, there is a crib wall. Drainage in the area is generally poor, with a few inches of standing water at the south end of the tunnel during wet weather. Prior to 2007, according to the Clearance Measurement Vehicle (CMV) clearance plate, the crest of the tunnel arch was (20 ft. 6 in.) above the top of rail. However, the minimum vertical clearance, due to
the arch curvature was really (18 ft. 2 in.) at (4 ft. 9 in.) from the centerline of track which is (9 ft. 6 in.) wide.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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