Bridge Type
Main Span(s): Prestressed concrete continuous [6] Stringer/Multi-beam or girder [02]
Approach Span(s): Concrete [1] Slab [01]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 259.1 m = 850.1 ft
Main Spans: 5 at 54.9 m = 180.1 ft
Approach Spans: 2
Skew: 6
Width, Roadway: 18.3 m = 60.0 ft (4 Lanes) and Out-To-Out: 21.8 m = 71.5 ft for a 18.6 m = 61.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 9.4 m = 30.8 ft
Location
Mount Vernon [47560]: Skagit County [057], Washington [53]
Owned by City or Municipal Highway Agency [04], DOT District: 1
0.7 N JCT SR 538
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Very Good [8]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 76.8 metric ton = 84.5 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 46 metric ton = 50.6 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
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: August 1999 [899] and Frequency: 24
Future Work
Work Needed: Other structural work: including hydraulic replacements. [38]
Bridge Detour: 0.5 km = 0.3 mi
Traffic
ADT: 21640 (2019) and Trucks: 10%
Future ADT: 39084 (In 2039
)