Bridge Type
Main Span(s): Steel [3] Truss - Thru [10]
Approach Span(s): Concrete continuous [2] 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: 111.6 m = 366.2 ft
Main Spans: 1 at 73.2 m = 240.2 ft
Approach Spans: 2
Skew: 0
Width, Roadway: 10.4 m = 34.1 ft (2 Lanes) and Out-To-Out: 13.6 m = 44.6 ft for a 12.2 m = 40.0 ft approaching roadway.
Vertical Clearance: 5.23 m = 17.2 ft and Navigational Clearance: 0 = N/A
Location
King [99033]: King County [033], Washington [53]
Owned by County Highway Agency [02], DOT District: 1
0.9 MI N OF I-90
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: HL93 [A]
Operating: 38.6 metric ton = 42.5 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 28.5 metric ton = 31.4 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
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 desirable criteria [8]
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 deck replacement with only incidental widening. [37]
Bridge Detour: 15.9 km = 9.9 mi
Traffic
ADT: 3500 (2020) and Trucks: 5%
Future ADT: 7500 (In 2040
)