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: 66.4 m = 217.9 ft
Main Spans: 4 at 22.9 m = 75.1 ft
Approach Spans: 0
Skew: 20
Width, Roadway: 14.6 m = 47.9 ft (4 Lanes) and Out-To-Out: 18.5 m = 60.7 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
Waltham [72600]: Middlesex County [017], Massachusetts [25]
Owned by State Highway Agency [01], DOT District: 4
0.5 MI NLY RT 20
Condition
Deck: Poor [4]
Superstructure: Fair [5]
Substructure: Poor [4]
Loading
Design: M 18 / H 20 [4]
Operating: 48.2 metric ton = 53.0 tons (Load Factor(LF) [1])
Inventory: 28.8 metric ton = 31.7 tons (Load Factor(LF) [1])
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Better than present minimum criteria [7]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: October 1999 [1099] and Frequency: 12
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 0.6 km = 0.4 mi
Traffic
ADT: 18600 (2018) and Trucks: 3%
Future ADT: 61435 (In 2032
)
