Bridge Type
Main Span(s): Prestressed concrete [5] Tee beam [04]
Approach Span(s): Other [00]
Deck: Other [9] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 213.4 m = 700.2 ft
Main Spans: 5 at 42.7 m = 140.1 ft
Approach Spans: 0
Skew: 15
Width, Roadway: 10.4 m = 34.1 ft (2 Lanes) and Out-To-Out: 13.3 m = 43.6 ft for a 13.1 m = 43.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 7.1 m = 23.3 ft
Location
Unalaska [80770]: Aleutians West Census Area [016], Alaska [02]
Owned by State Highway Agency [01], DOT District: 3
MILE POINT 0.7
Condition
Deck: Very Good [8]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: HL93 [A]
Operating: 80.2 metric ton = 88.2 tons (Load Factor(LF) [1])
Inventory: 36.9 metric ton = 40.6 tons (Load Factor(LF) [1])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: September 2020 [0920] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 19.9 km = 12.3 mi
Traffic
ADT: 3912 (2018) and Trucks: 17%
Future ADT: 5471 (In 2035
)
