US Bridges

North Mountain RD over Simpson Creek

FairPosted for load

Alleghany County, Virginia · 1.20 Rt 777-3.86 Rock CO · Structure no. 000000000001210

Built
1927
98 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete
Length
82 ft
3 main spans
Daily traffic
92
2022 count
Owner
State
State Highway Agency

About this bridge

North Mountain RD over Simpson Creek is a concrete tee beam carrying North Mountain RD over Simpson Creek in Alleghany County, Virginia. It was built in 1927, so it is 98 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 92 vehicles a day, roughly 12% of them trucks, projected to reach 103 by 2045. The structure is 82 ft (25.1 m) long and 26 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesNorth Mountain RD
CrossesSimpson Creek
Location1.20 Rt 777-3.86 Rock CO
RouteCounty Highway 850
CountyAlleghany County
StateVirginia
Coordinates37.8276, -79.65897
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length82 ft (25.1 m)
Longest span25 ft (7.6 m)
Deck width26 ft (8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92 (2022)
Projected traffic103 by 2045
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$775 million
NavigationNo navigation control on waterway

Frequently asked questions

When was North Mountain RD over Simpson Creek built?

It was built in 1927, making it 98 years old in 2025.

What condition is North Mountain RD over Simpson Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does North Mountain RD over Simpson Creek carry?

About 92 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is North Mountain RD over Simpson Creek?

The structure is 82 ft (25.1 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns North Mountain RD over Simpson Creek?

It is owned by the State Highway Agency.