Bridge Type
Main Span(s): Concrete [1] Arch - Deck [11]
Approach Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Latex Concrete or similar additive [3]
Bridge Dimensions
Length: 67.1 m = 220.2 ft
Main Spans: 1 at 36.6 m = 120.1 ft
Approach Spans: 5
Skew: 0
Width, Roadway: 6.1 m = 20.0 ft (2 Lanes) and Out-To-Out: 7.1 m = 23.3 ft for a 8.5 m = 27.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Unknown [00000]: Custer County [033], South Dakota [46]
Owned by National Park Service [66], DOT District: 4
ON SD ROUTE 87: MP 41.4;
Condition
Deck: Satisfactory [6]
Superstructure: Satisfactory [6]
Substructure: Fair [5]
Loading
Design:
Operating: 23.4 metric ton = 25.7 tons (Load Factor(LF) [1])
Inventory: 14 metric ton = 15.4 tons (Load Factor(LF) [1])
Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present minimum criteria [6]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: August 1999 [899] and Frequency: 24
Future Work
Work Needed: Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Bridge Detour: 6.6 km = 4.1 mi
Traffic
ADT: 324 (2013) and Trucks: 2%
Future ADT: 389 (In 2033
)
