US Bridges

Mason Street over Blacks Run

Fair

Harrisonburg city, Virginia · 0010GAY ST 0004N Main S · Structure no. 000000000020429

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
35 ft
3 main spans
Daily traffic
6,125
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mason Street over Blacks Run is a concrete culvert carrying Mason Street over Blacks Run in Harrisonburg city, Virginia. It was built in 1970, so it is 55 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 6,125 vehicles a day, projected to reach 8,942 by 2042. The structure is 35 ft (10.8 m) long and 109 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMason Street
CrossesBlacks Run
Location0010GAY ST 0004N Main S
RouteCity Street 0
Coordinates38.4549, -78.86536
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length35 ft (10.8 m)
Longest span11 ft (3.4 m)
Deck width109 ft (33.2 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,125 (2022)
Projected traffic8,942 by 2042
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mason Street over Blacks Run built?

It was built in 1970, making it 55 years old in 2025.

What condition is Mason Street over Blacks Run 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 November 2023.

How much traffic does Mason Street over Blacks Run carry?

About 6,125 vehicles per day (2022 count).

How long is Mason Street over Blacks Run?

The structure is 35 ft (10.8 m) long with a longest span of 11 ft (3.4 m) and a deck 109 ft wide.

Who owns Mason Street over Blacks Run?

It is owned by the City or Municipal Highway Agency.