Historic Bridges: Merrimack County, New Hampshire

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S - Dismantled and/or in storage. L - Severe loss of historic integrity due to alteration.

Total Bridges Found: 8

X
Boscawen - Canterbury Bridge
HSR

Depot Street (West Road) Over Merrimack River in Boscawen and Canterbury: Merrimack County, New Hampshire, United States

Metal 9 Panel Rivet-Connected Parker Through Truss, Fixed

Length: 347 ft. Main Span: 170 ft. Roadway: 17.4 ft. Main Spans: 2

Built 1907 By: American Bridge Company of New York, New York and John W. Storrs of Concord, New Hampshire

This unaltered bridge was the oldest example of its type in the entire state of New Hampshire.

Edna Dean Proctor Bridge
HSR

NH-114 (Bridge Street) Over Contoocook River in Henniker: Merrimack County, New Hampshire, United States

Concrete (Stone Faced) Closed Spandrel Deck Arch, Fixed

Length: 118 ft. Main Span: 55 ft. Roadway: 31.2 ft. Main Spans: 2

Built 1939 By: Unknown

This is a concrete arch bridge that is faced in stone to make it look like a stone arch bridge.

Patterson Hill Road Bridge
HSR

Patterson Hill Road Over Contoocook River in Rural: Merrimack County, New Hampshire, United States

Metal 7 Panel Rivet-Connected Pratt Through Truss, Fixed

Length: 119 ft. Main Span: 113 ft. Roadway: 13.5 ft. Main Spans: 1

Built 1915 By: Groton Bridge Company of Groton, New York and Storrs and Storrs of Concord, New Hampshire

This preserved historic bridge was designed by a noteworthy local engineering firm.

Pineground Bridge
Thunder Bridge
HSR

Depot Road (Old Alignment) Over Suncook River in Chichester: Merrimack County, New Hampshire, United States

Metal 6 Panel Pin-Connected Lenticular Through Truss, Fixed

Main Span: 96 ft. Roadway: 15 ft. Main Spans: 1

Built 1887 By: Berlin Iron Bridge Company of East Berlin, Connecticut

This bypassed bridge is the only lenticular through truss in the state, and is an example of hisoric bridge preservation at its best.

Ramsdell Road Bridge
HSR

Ramsdell Road Over Contoocook River in Henniker: Merrimack County, New Hampshire, United States

Metal 8 Panel Rivet-Connected Warren Through Truss, Fixed

Length: 111 ft. Main Span: 108 ft. Roadway: 18 ft. Main Spans: 1

Built 1937 By: Unknown

This truss bridge displays some representative design details for a bridge of its age, and has been preserved.

X
Sewalls Falls Road Bridge
HSR

Sewalls Falls Road Over Merrimack River in Concord: Merrimack County, New Hampshire, United States

Metal 9 Panel Rivet-Connected Pratt Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed

Length: 660 ft. Main Span: 167 ft. Roadway: 16.4 ft. Main Spans: 2

Built 1915 By: Berlin Construction Company of Berlin Connecticut and John W. Storrs of Concord, New Hampshire (Storrs and Storrs of Concord, New Hampshire)

This was a bridge designed by one of the state's most notable engineers, and was also built by a notable bridge company, yet this bridge was not preserved.

Tilton Island Park Bridge
HSR