US Bridges

Mill Mountain Spur over Va Route 672

Good

Roanoke County, Virginia · 0.2 Miles to Parkway at M · Structure no. 5140035P0000000

Built
1966
59 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
117 ft
3 main spans
Daily traffic
400
2012 count
Owner
Federal
National Park Service

About this bridge

Mill Mountain Spur over Va Route 672 is a concrete continuous slab carrying Mill Mountain Spur over Va Route 672 in Roanoke County, Virginia. It was built in 1966, so it is 59 years old, older 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 400 vehicles a day, projected to reach 440 by 2032. The structure is 117 ft (35.8 m) long and 37 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesMill Mountain Spur
CrossesVa Route 672
Location0.2 Miles to Parkway at M
RouteFederal Lands Road 138
Coordinates37.21906, -79.95122
Functional classRural Local

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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length117 ft (35.8 m)
Longest span48 ft (14.6 m)
Deck width37 ft (11.3 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2012)
Projected traffic440 by 2032
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$53,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mill Mountain Spur over Va Route 672 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Mill Mountain Spur over Va Route 672 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 June 2024.

How much traffic does Mill Mountain Spur over Va Route 672 carry?

About 400 vehicles per day (2012 count).

How long is Mill Mountain Spur over Va Route 672?

The structure is 117 ft (35.8 m) long with a longest span of 48 ft (14.6 m) and a deck 37 ft wide.

Who owns Mill Mountain Spur over Va Route 672?

It is owned by the National Park Service.