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Nearby Bridges in NBI 2021: 1


NH149 over CONTOOCOOK RIVER (Route: 149)
Num:12201440003300x
Open: no restriction [A]
Built: 1893, Reconstructed: 1940
Historic: Bridge is possibly eligible for the NRHP. [3]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Concrete [1] Frame [07]
Approach Span(s): Masonry [8] Arch - Deck [11]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 75 m = 246.1 ft
Main Spans: 1 at 21.3 m = 69.9 ft
Approach Spans: 1
Skew: 0
Width, Roadway: 6.5 m = 21.3 ft (2 Lanes) and Out-To-Out: 8.7 m = 28.5 ft for a 6.4 m = 21.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Hillsborough [36180]: Hillsborough County [011], New Hampshire [33]
Owned by State Highway Agency [01], DOT District: 4
.1 MI. FROM JCT. US 202
Condition
Deck: Fair [5]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: M 13.5 / H 15 [2]
Operating: 33 metric ton = 36.3 tons (Load Factor(LF) [1])
Inventory: 19.8 metric ton = 21.8 tons (Load Factor(LF) [1])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: March 2020 [0320] 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: 2.1 km = 1.3 mi
Traffic
ADT: 4888 (2019) and Trucks: 10%
Future ADT: 7234 (In 2041 )

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.

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