Bridge Type
Main Span(s): Concrete [1] Arch - Deck [11]
Approach Span(s): Other [00]
Deck: Not applicable [N] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 27.4 m = 89.9 ft
Main Spans: 1 at 27.4 m = 89.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 18.3 m = 60.0 ft (5 Lanes) and Out-To-Out: 24.7 m = 81.0 ft for a 18.3 m = 60.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Watertown [73405]: Middlesex County [017], Massachusetts [25]
Owned by State Highway Agency [01], DOT District: 6
AT NONANTUM RD
Condition
Deck: Not Applicable [N]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: M 18 / H 20 [4]
Operating: 69.7 metric ton = 76.7 tons (Load Factor(LF) [1])
Inventory: 41.7 metric ton = 45.9 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: Better than present minimum criteria [7]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: February 1999 [299] and Frequency: 24
Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 49000 (2017) and Trucks: 9%
Future ADT: 69015 (In 2032
)