Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Concrete [1] Frame [07]
Deck: Open Grating [3] with Wearing Surface: Other [9]
Bridge Dimensions
Length: 44.8 m = 147.0 ft
Main Spans: 1 at 30.5 m = 100.1 ft
Approach Spans: 2
Skew: 0
Width, Roadway: 14.6 m = 47.9 ft (4 Lanes) and Out-To-Out: 20.4 m = 66.9 ft for a 14.9 m = 48.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0.3 m = 1.0 ft
Location
Port Huron [65820]: St. Clair County [147], Michigan [26]
Owned by State Highway Agency [01], DOT District: 4
IN PORT HURON (MILITARY A
Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 49.6 metric ton = 54.6 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 29.8 metric ton = 32.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
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: Basically intolerable requiring high priority of corrrective action [3] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: April 2020 [0420] and Frequency: 15
Future Work
Work Needed:
Bridge Detour: 0.5 km = 0.3 mi
Traffic
ADT: 16311 (2007) and Trucks: 3%
Future ADT: 9706 (In 2018
)