Bridge Type
Main Span(s): Prestressed concrete [5] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]
Bridge Dimensions
Length: 55.4 m = 181.8 ft
Main Spans: 3 at 18.5 m = 60.7 ft
Approach Spans: 0
Skew: 12
Width, Roadway: 7.3 m = 24.0 ft (2 Lanes) and Out-To-Out: 8.2 m = 26.9 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
Enumclaw [22045]: King County [033], Washington [53]
Owned by Corps of Engineers (Civil) [70], DOT District: 1
MUD MOUNTAIN DAM: WA
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Very Good [8]
Loading
Design: M 13.5 / H 15 [2]
Operating: 34.7 metric ton = 38.2 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 16.8 metric ton = 18.5 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: Equal to present minimum criteria [6]
Road Alignment: Equal to present minimum criteria [6]
Waterway: N/A [N] and Bridge not over waterway. [N]
Inspections
Date: July 2018 [0718] and Frequency: 48
Future Work
Work Needed: Other structural work: including hydraulic replacements. [38]
Bridge Detour: 2.4 km = 1.5 mi
Traffic
ADT: 75 (2017) and Trucks: 10%
Future ADT: 100 (In 2039
)
