Bridge Type
Main Span(s): Concrete continuous [2] Box Beam or girders - Single or Spread [06]
Approach Span(s): Concrete continuous [2] Tee beam [04]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]
Bridge Dimensions
Length: 58.2 m = 191.0 ft
Main Spans: 1 at 32 m = 105.0 ft
Approach Spans: 2
Skew: 27
Width, Roadway: 6.7 m = 22.0 ft (2 Lanes) and Out-To-Out: 8.9 m = 29.2 ft for a 6.7 m = 22.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Bridgeport [07870]: Douglas County [017], Washington [53]
Owned by Corps of Engineers (Civil) [70], DOT District: 2
CHIEF JOSEPH DAM: WA
Condition
Deck: Very Good [8]
Superstructure: Good [7]
Substructure: Very Good [8]
Loading
Design: MS 18+Mod / HS 20+Mod [6]
Operating: 33.4 metric ton = 36.7 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 25.9 metric ton = 28.5 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Better than present minimum criteria [7] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: July 2020 [0720] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 19.9 km = 12.3 mi
Traffic
ADT: 100 (2006) and Trucks: 10%
Future ADT: 100 (In 2037
)