US Bridges

North Fork RD./603 over N Fork Roanoke River

Good

Montgomery County, Virginia · 0.70-RTE629; 1.05-RTE635 · Structure no. 000000000012188

Built
1970
55 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
82 ft
2 main spans
Daily traffic
2,072
2022 count
Owner
State
State Highway Agency

About this bridge

North Fork RD./603 over N Fork Roanoke River is a steel stringer/multi-beam or girder carrying North Fork RD./603 over N Fork Roanoke River in Montgomery County, Virginia. It was built in 1970, so it is 55 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 2,072 vehicles a day, roughly 1% of them trucks, projected to reach 2,310 by 2045. The structure is 82 ft (25 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNorth Fork RD./603
CrossesN Fork Roanoke River
Location0.70-RTE629; 1.05-RTE635
RouteCounty Highway 603
Coordinates37.23233, -80.25416
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating58 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length82 ft (25 m)
Longest span41 ft (12.5 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,072 (2022)
Projected traffic2,310 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$8 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Fork RD./603 over N Fork Roanoke River built?

It was built in 1970, making it 55 years old in 2025.

What condition is North Fork RD./603 over N Fork Roanoke River 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 October 2023.

How much traffic does North Fork RD./603 over N Fork Roanoke River carry?

About 2,072 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is North Fork RD./603 over N Fork Roanoke River?

The structure is 82 ft (25 m) long with a longest span of 41 ft (12.5 m) and a deck 34 ft wide.

Who owns North Fork RD./603 over N Fork Roanoke River?

It is owned by the State Highway Agency.