Bridge Type
Main Span(s): Steel continuous [4] Truss - Deck [09]
Approach Span(s): Concrete [1] Mixed types [20]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Latex Concrete or similar additive [3]
Bridge Dimensions
Length: 1350 m = 4429.4 ft
Main Spans: 6 at 168.2 m = 551.9 ft
Approach Spans: 28
Skew: 0
Width, Roadway: 53 m = 173.9 ft (12 Lanes) and Out-To-Out: 55.5 m = 182.1 ft for a 44.5 m = 146.0 ft approaching roadway.
Vertical Clearance: 4.93 m = 16.2 ft and Navigational Clearance: 39 m = 128.0 ft
Location
Unknown [00000]: King County [033], Washington [53]
Owned by State Highway Agency [01], DOT District: 1
0.7 N JCT SR 520
Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 28.8 metric ton = 31.7 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 22.4 metric ton = 24.6 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
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 foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: July 1999 [799] and Frequency: 24
Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 187355 (2019) and Trucks: 5%
Future ADT: 264545 (In 2039
)