US Bridges

Bent Mtn. Road over Back Creek

Good

Roanoke County, Virginia · 0.27-RT 688; 0.30-RT 735 · Structure no. 000000000026083

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
377 ft
4 main spans
Daily traffic
14,086
2022 count
Owner
State
State Highway Agency

About this bridge

Bent Mtn. Road over Back Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Bent Mtn. Road over Back Creek in Roanoke County, Virginia. It was built in 2013, so it is 12 years old, younger than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,086 vehicles a day, projected to reach 17,475 by 2045. The structure is 377 ft (114.8 m) long and 63 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesBent Mtn. Road
CrossesBack Creek
Location0.27-RT 688; 0.30-RT 735
RouteU.S. Route 221
CountyRoanoke County
StateVirginia
Coordinates37.20167, -80.02889
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating69 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length377 ft (114.8 m)
Longest span94 ft (28.5 m)
Deck width63 ft (19.1 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,086 (2022)
Projected traffic17,475 by 2045
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bent Mtn. Road over Back Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is Bent Mtn. Road over Back Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Bent Mtn. Road over Back Creek carry?

About 14,086 vehicles per day (2022 count).

How long is Bent Mtn. Road over Back Creek?

The structure is 377 ft (114.8 m) long with a longest span of 94 ft (28.5 m) and a deck 63 ft wide.

Who owns Bent Mtn. Road over Back Creek?

It is owned by the State Highway Agency.