Bridge Type
Main Span(s): Steel continuous [4] Box beam or girders - Multiple [05]
Approach Span(s): Concrete [1] Slab [01]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 94.8 m = 311.0 ft
Main Spans: 2 at 44.2 m = 145.0 ft
Approach Spans: 1
Skew: 29
Width, Roadway: 15.5 m = 50.9 ft (4 Lanes) and Out-To-Out: 19.6 m = 64.3 ft for a 15.2 m = 49.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Boise [08700]: Ada County [001], Idaho [16]
Owned by County Highway Agency [02], DOT District: 3
IN BOISE;S. 9TH STREET
Condition
Deck: Satisfactory [6]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 55.3 metric ton = 60.8 tons (Load Factor(LF) [1])
Inventory: 33.6 metric ton = 37.0 tons (Load Factor(LF) [1])
Appraisal
Structural: Better than present minimum criteria [7]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: November 1999 [1199] and Frequency: 48
Future Work
Work Needed: Widening of existing bridge with deck rehabilitation or replacement. [34]
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 21000 (2019) and Trucks: 1%
Future ADT: 31500 (In 2039
)