US Bridges

Sylvatus HWY/RT100 over Rock Creek

Fair

Carroll County, Virginia · 0.06-RTE828;0.92-WYTHE Cl · Structure no. 000000000004608

Built
1942
83 years old, rebuilt 2017
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
3,613
2022 count
Owner
State
State Highway Agency

About this bridge

Sylvatus HWY/RT100 over Rock Creek is a prestressed concrete box beam or girders - multiple carrying Sylvatus HWY/RT100 over Rock Creek in Carroll County, Virginia. It was built in 1942 and reconstructed in 2017, so it is 83 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 6 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 3,613 vehicles a day, projected to reach 3,841 by 2045. The structure is 48 ft (14.5 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSylvatus HWY/RT100
CrossesRock Creek
Location0.06-RTE828;0.92-WYTHE Cl
RouteState Highway 100
CountyCarroll County
StateVirginia
Coordinates36.85889, -80.7643
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating74 US tons
Inventory rating57 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length48 ft (14.5 m)
Longest span48 ft (14.5 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,613 (2022)
Projected traffic3,841 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$3 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sylvatus HWY/RT100 over Rock Creek built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 2017.

What condition is Sylvatus HWY/RT100 over Rock 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 October 2023.

How much traffic does Sylvatus HWY/RT100 over Rock Creek carry?

About 3,613 vehicles per day (2022 count).

How long is Sylvatus HWY/RT100 over Rock Creek?

The structure is 48 ft (14.5 m) long with a longest span of 48 ft (14.5 m) and a deck 31 ft wide.

Who owns Sylvatus HWY/RT100 over Rock Creek?

It is owned by the State Highway Agency.