US Bridges

Stone Keep LA/813 over Roanoke River @ Kumis

FairPosted for load

Montgomery County, Virginia · 0.00-ROA Co; 0.0-MONT CO · Structure no. 000000000012363

Built
1924
101 years old
Condition
Fair
inspected May 2024
Type
Truss - Thru
Steel
Length
316 ft
2 main spans
Daily traffic
153
2018 count
Owner
State
State Highway Agency

About this bridge

Stone Keep LA/813 over Roanoke River @ Kumis is a steel truss - thru carrying Stone Keep LA/813 over Roanoke River @ Kumis in Montgomery County, Virginia. It was built in 1924, so it is 101 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 153 vehicles a day, projected to reach 174 by 2045. The structure is 316 ft (96.4 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesStone Keep LA/813
CrossesRoanoke River @ Kumis
Location0.00-ROA Co; 0.0-MONT CO
RouteCounty Highway 813
CountyMontgomery County
StateVirginia
Coordinates37.23384, -80.1917
Functional classUrban Local

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.
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 inspectionMay 2024
Inspection intervalevery 12 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+5 approach)
Design loadUnknown
Structure length316 ft (96.4 m)
Longest span75 ft (22.9 m)
Deck width21 ft (6.4 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic153 (2018)
Projected traffic174 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$992 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stone Keep LA/813 over Roanoke River @ Kumis built?

It was built in 1924, making it 101 years old in 2025.

What condition is Stone Keep LA/813 over Roanoke River @ Kumis 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 May 2024.

How much traffic does Stone Keep LA/813 over Roanoke River @ Kumis carry?

About 153 vehicles per day (2018 count).

How long is Stone Keep LA/813 over Roanoke River @ Kumis?

The structure is 316 ft (96.4 m) long with a longest span of 75 ft (22.9 m) and a deck 21 ft wide.

Who owns Stone Keep LA/813 over Roanoke River @ Kumis?

It is owned by the State Highway Agency.