US Bridges

Mt Lake RD/700 over Sinking Creek

FairPosted for load

Giles County, Virginia · 0.00-RT 604; 0.20-RT 783 · Structure no. 000000000008478

Built
1949
76 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
126 ft
3 main spans
Daily traffic
636
2022 count
Owner
State
State Highway Agency

About this bridge

Mt Lake RD/700 over Sinking Creek is a concrete tee beam carrying Mt Lake RD/700 over Sinking Creek in Giles County, Virginia. It was built in 1949, so it is 76 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 636 vehicles a day, roughly 1% of them trucks, projected to reach 709 by 2045. The structure is 126 ft (38.4 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesMt Lake RD/700
CrossesSinking Creek
Location0.00-RT 604; 0.20-RT 783
RouteCounty Highway 700
CountyGiles County
StateVirginia
Coordinates37.31122, -80.51617
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length126 ft (38.4 m)
Longest span42 ft (12.8 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic636 (2022)
Projected traffic709 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$409.4 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Lake RD/700 over Sinking Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is Mt Lake RD/700 over Sinking 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 January 2025.

How much traffic does Mt Lake RD/700 over Sinking Creek carry?

About 636 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Mt Lake RD/700 over Sinking Creek?

The structure is 126 ft (38.4 m) long with a longest span of 42 ft (12.8 m) and a deck 24 ft wide.

Who owns Mt Lake RD/700 over Sinking Creek?

It is owned by the State Highway Agency.