US Bridges

Mar CO Rt. 20 over Dunkard Mill Run

Fair

Marion County, West Virginia · 0.10 Mi. N of Mar. 20/2 · Structure no. 00000000025A265

Built
2011
14 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
550
2022 count
Owner
State
State Highway Agency

About this bridge

Mar CO Rt. 20 over Dunkard Mill Run is a prestressed concrete box beam or girders - multiple carrying Mar CO Rt. 20 over Dunkard Mill Run in Marion County, West Virginia. It was built in 2011, so it is 14 years old, younger than the West Virginia average of 44.7 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 550 vehicles a day, roughly 8% of them trucks, projected to reach 860 by 2041. The structure is 43 ft (13 m) long and 21 ft wide.

Location

Open in Google Maps
CarriesMar CO Rt. 20
CrossesDunkard Mill Run
Location0.10 Mi. N of Mar. 20/2
RouteCounty Highway 20
CountyMarion County
StateWest Virginia
Coordinates39.51499, -80.22575
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating57 US tons
Inventory rating45 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length43 ft (13 m)
Longest span39 ft (11.9 m)
Deck width21 ft (6.5 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2022)
Projected traffic860 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mar CO Rt. 20 over Dunkard Mill Run built?

It was built in 2011, making it 14 years old in 2025.

What condition is Mar CO Rt. 20 over Dunkard Mill 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 July 2023.

How much traffic does Mar CO Rt. 20 over Dunkard Mill Run carry?

About 550 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mar CO Rt. 20 over Dunkard Mill Run?

The structure is 43 ft (13 m) long with a longest span of 39 ft (11.9 m) and a deck 21 ft wide.

Who owns Mar CO Rt. 20 over Dunkard Mill Run?

It is owned by the State Highway Agency.