Bridge Type
Main Span(s): Steel [3] Suspension [13]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Wood or Timber [8] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 180.7 m = 592.9 ft
Main Spans: 1 at 140.2 m = 460.0 ft
Approach Spans: 2
Skew: 0
Width, Roadway: 6.1 m = 20.0 ft (2 Lanes) and Out-To-Out: 7.2 m = 23.6 ft for a 6.7 m = 22.0 ft approaching roadway.
Vertical Clearance: 4.72 m = 15.5 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Jefferson County [031], Oregon [41]
Owned by County Highway Agency [02], DOT District: 10
AT LAKE BILLY CHINOOK
Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Fair [5]
Loading
Design: M 18 / H 20 [4]
Operating: 12 metric ton = 13.2 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 9.1 metric ton = 10.0 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Appraisal
Structural: Basically intolerable requiring high priority of corrrective action [3]
Deck Geometry: Basically intolerable requiring high priority of corrrective action [3]
Road Alignment: Basically intolerable requiring high priority of corrrective action [3]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required. [4]
Inspections
Date: May 2020 [0520] and Frequency: 12
Future Work
Work Needed: Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Bridge Detour: 12.9 km = 8.0 mi
Traffic
ADT: 579 (2020) and Trucks: 10%
Future ADT: 679 (In 2025
)
