Bridge Type
Main Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 180.8 m = 593.2 ft
Main Spans: 4 at 39.6 m = 129.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 14.6 m = 47.9 ft (2 Lanes) and Out-To-Out: 17.1 m = 56.1 ft for a 14.6 m = 47.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Boscawen [06260]: Merrimack County [013], New Hampshire [33]
Owned by State Highway Agency [01], DOT District: 5
CANTERBURY T.L.
Condition
Deck: Very Good [8]
Superstructure: Very Good [8]
Substructure: Good [7]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 88.2 metric ton = 97.0 tons (Load Factor(LF) [1])
Inventory: 52.7 metric ton = 58.0 tons (Load Factor(LF) [1])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Superior to present desirable criteria [9]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: June 1999 [699] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 1.1 km = 0.7 mi
Traffic
ADT: 14456 (2019) and Trucks: 5%
Future ADT: 21394 (In 2041
)