US Bridges

Knightly Mill RD over Middle River

PoorClosed to traffic

Augusta County, Virginia · 0.26 Rt 777 - 2.05 Rt 608 · Structure no. 000000000002320

Built
1915
110 years old
Condition
Poor
inspected October 2023
Type
Truss - Thru
Steel
Length
182 ft
1 main span
Daily traffic
309
2019 count
Owner
State
State Highway Agency

About this bridge

Knightly Mill RD over Middle River is a steel truss - thru carrying Knightly Mill RD over Middle River in Augusta County, Virginia. It was built in 1915, so it is 110 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 309 vehicles a day, projected to reach 470 by 2045. The structure is 182 ft (55.5 m) long and 15 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesKnightly Mill RD
CrossesMiddle River
Location0.26 Rt 777 - 2.05 Rt 608
RouteCounty Highway 778
CountyAugusta County
StateVirginia
Coordinates38.23016, -78.92606
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length182 ft (55.5 m)
Longest span182 ft (55.5 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deck16 ft (4.7 m)

Traffic and service

Average daily traffic309 (2019)
Projected traffic470 by 2045
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$788 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Knightly Mill RD over Middle River built?

It was built in 1915, making it 110 years old in 2025.

What condition is Knightly Mill RD over Middle River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does Knightly Mill RD over Middle River carry?

About 309 vehicles per day (2019 count).

How long is Knightly Mill RD over Middle River?

The structure is 182 ft (55.5 m) long with a longest span of 182 ft (55.5 m) and a deck 15 ft wide.

Who owns Knightly Mill RD over Middle River?

It is owned by the State Highway Agency.