US Bridges

Alghny Sprg RD/637 over S Fork Roanoke River

Fair

Montgomery County, Virginia · 2.40-RT690; 0.40-RT638 · Structure no. 000000000012248

Built
1975
50 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
125 ft
3 main spans
Daily traffic
1,320
2022 count
Owner
State
State Highway Agency

About this bridge

Alghny Sprg RD/637 over S Fork Roanoke River is a steel stringer/multi-beam or girder carrying Alghny Sprg RD/637 over S Fork Roanoke River in Montgomery County, Virginia. It was built in 1975, so it is 50 years old, younger 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.

It carries about 1,320 vehicles a day, roughly 1% of them trucks, projected to reach 1,472 by 2042. The structure is 125 ft (38.1 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesAlghny Sprg RD/637
CrossesS Fork Roanoke River
Location2.40-RT690; 0.40-RT638
RouteCounty Highway 637
CountyMontgomery County
StateVirginia
Coordinates37.14158, -80.26572
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating69 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length125 ft (38.1 m)
Longest span42 ft (12.8 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,320 (2022)
Projected traffic1,472 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Alghny Sprg RD/637 over S Fork Roanoke River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Alghny Sprg RD/637 over S Fork Roanoke River 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 December 2023.

How much traffic does Alghny Sprg RD/637 over S Fork Roanoke River carry?

About 1,320 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Alghny Sprg RD/637 over S Fork Roanoke River?

The structure is 125 ft (38.1 m) long with a longest span of 42 ft (12.8 m) and a deck 36 ft wide.

Who owns Alghny Sprg RD/637 over S Fork Roanoke River?

It is owned by the State Highway Agency.