US Bridges

Knightly Mill RD over Trib Middle River

Good

Augusta County, Virginia · 0.65 Rt 775 - 0.45 Rt 777 · Structure no. 000000000024268

Built
1995
30 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
241
2017 count
Owner
State
State Highway Agency

About this bridge

Knightly Mill RD over Trib Middle River is a concrete culvert carrying Knightly Mill RD over Trib Middle River in Augusta County, Virginia. It was built in 1995, so it is 30 years old, younger 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 241 vehicles a day, projected to reach 295 by 2045. The structure is 23 ft (7 m) long. If it were closed, the detour would be 8.7 mi (14 km).

CarriesKnightly Mill RD
CrossesTrib Middle River
Location0.65 Rt 775 - 0.45 Rt 777
RouteCounty Highway 778
Coordinates38.23676, -78.9226
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic241 (2017)
Projected traffic295 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Knightly Mill RD over Trib Middle River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Knightly Mill RD over Trib Middle 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 Knightly Mill RD over Trib Middle River carry?

About 241 vehicles per day (2017 count).

How long is Knightly Mill RD over Trib Middle River?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Knightly Mill RD over Trib Middle River?

It is owned by the State Highway Agency.