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Nearby Bridges in NBI 2021: 1


ST 97 /ST113/LNCLN over WATER MERRIMACK RIVER (Route: 97)
Num:G15001B6KDOTNBIx
Open: no restriction [A]
Built: 2013, Reconstructed: N/A [0000]
Historic: Historical significance is not determinable at this time. [4]

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Rough Distance: 0 Miles (0 Kilometers)

Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Deck: Closed Grating [4] with Wearing Surface: Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]
Bridge Dimensions
Length: 236.4 m = 775.6 ft
Main Spans: 1 at 51.5 m = 169.0 ft
Approach Spans: 4
Skew: 2
Width, Roadway: 13.5 m = 44.3 ft (2 Lanes) and Out-To-Out: 16.4 m = 53.8 ft for a 8.2 m = 26.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 4.9 m = 16.1 ft
Location
Groveland [27620]: Essex County [009], Massachusetts [25]
Owned by State Highway Agency [01], DOT District: 4
AT MERRIMAC RIVER
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 78.1 metric ton = 85.9 tons (Load Factor(LF) [1])
Inventory: 46.7 metric ton = 51.4 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 minimum criteria [6]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: December 1999 [1299] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.9 km = 0.6 mi
Traffic
ADT: 17246 (2018) and Trucks: 6%
Future ADT: 0 (In 0 )

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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