Bridge Type
Main Span(s): Steel [3] Other [00]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 102.4 m = 336.0 ft
Main Spans: 2 at 49.8 m = 163.4 ft
Approach Spans: 0
Skew: 32
Width, Roadway: 8.5 m = 27.9 ft (2 Lanes) and Out-To-Out: 9.8 m = 32.2 ft for a 6.7 m = 22.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Henniker [35540]: Merrimack County [013], New Hampshire [33]
Owned by City or Municipal Highway Agency [04], DOT District: 5
2.7 MI FR HILLSBOROUGH T
Condition
Deck: Excellent [9]
Superstructure: Excellent [9]
Substructure: Excellent [9]
Loading
Design: HL93 [A]
Operating: 61.2 metric ton = 67.3 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 47 metric ton = 51.7 tons (Load and Resistance Factor(LRFR) [3])
Appraisal
Structural: Superior to present desirable criteria [9]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present minimum criteria [6] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: October 1999 [1099] 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: 0.2 km = 0.1 mi
Traffic
ADT: 503 (2019) and Trucks: 4%
Future ADT: 744 (In 2041
)