US Bridges

Siler RD over Back Creek

GoodPosted for load

Frederick County, Virginia · 0.10 to 687 - 1.50 to 689 · Structure no. 000000000008176

Built
1969
56 years old
Condition
Good
inspected March 2025
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
823
2022 count
Owner
State
State Highway Agency

About this bridge

Siler RD over Back Creek is a concrete continuous slab carrying Siler RD over Back Creek in Frederick County, Virginia. It was built in 1969, so it is 56 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 823 vehicles a day, roughly 1% of them trucks, projected to reach 1,073 by 2045. The structure is 92 ft (28 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSiler RD
CrossesBack Creek
Location0.10 to 687 - 1.50 to 689
RouteCounty Highway 600
Coordinates39.28869, -78.25442
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length92 ft (28 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic823 (2022)
Projected traffic1,073 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Siler RD over Back Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Siler RD 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 March 2025.

How much traffic does Siler RD over Back Creek carry?

About 823 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Siler RD over Back Creek?

The structure is 92 ft (28 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns Siler RD over Back Creek?

It is owned by the State Highway Agency.