Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Concrete [1] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 77.7 m = 254.9 ft
Main Spans: 1 at 48.8 m = 160.1 ft
Approach Spans: 2
Skew: 15
Width, Roadway: 7.3 m = 24.0 ft (2 Lanes) and Out-To-Out: 8.4 m = 27.6 ft for a 7.3 m = 24.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Skykomish [64855]: King County [033], Washington [53]
Owned by County Highway Agency [02], DOT District: 1
0.1 MI S OF SR-2
Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Satisfactory [6]
Loading
Design: MS 13.5 / HS 15 [3]
Operating: 53.5 metric ton = 58.9 tons (Load Factor(LF) [1])
Inventory: 31.7 metric ton = 34.9 tons (Load Factor(LF) [1])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: June 2020 [0620] and Frequency: 24
Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 15.9 km = 9.9 mi
Traffic
ADT: 112 (2018) and Trucks: 5%
Future ADT: 190 (In 2038
)