Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Latex Concrete or similar additive [3]
Bridge Dimensions
Length: 79.8 m = 261.8 ft
Main Spans: 1 at 38.7 m = 127.0 ft
Approach Spans: 5
Skew: 0
Width, Roadway: 12.2 m = 40.0 ft (3 Lanes) and Out-To-Out: 18.9 m = 62.0 ft for a 14 m = 45.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 2.1 m = 6.9 ft
Location
Alpena [01740]: Alpena County [007], Michigan [26]
Owned by City or Municipal Highway Agency [04], DOT District: 2
0.2 MI E OF US23
Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: MS 18 / HS 20 [5]
Operating: 43.1 metric ton = 47.4 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 25.9 metric ton = 28.5 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: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: July 1999 [799] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 15700 (2016) and Trucks: 6%
Future ADT: 17000 (In 2036
)
