Bridge Type
Main Span(s): Steel [3] 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: 37.5 m = 123.0 ft
Main Spans: 1 at 36.6 m = 120.1 ft
Approach Spans: 0
Skew: 30
Width, Roadway: 13.4 m = 44.0 ft (2 Lanes) and Out-To-Out: 14.6 m = 47.9 ft for a 12.2 m = 40.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Ayer [03005]: Middlesex County [017], Massachusetts [25]
Owned by State Highway Agency [01], DOT District: 3
AT AYER SHIRLEY TOWN LINE
Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Satisfactory [6]
Loading
Design: M 18 / H 20 [4]
Operating: 63.1 metric ton = 69.4 tons (Load Factor(LF) [1])
Inventory: 37.8 metric ton = 41.6 tons (Load Factor(LF) [1])
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: July 1999 [799] and Frequency: 24
Future Work
Work Needed: Other structural work: including hydraulic replacements. [38]
Bridge Detour: 1.1 km = 0.7 mi
Traffic
ADT: 7361 (2018) and Trucks: 10%
Future ADT: 9002 (In 2032
)
