US Bridges

Mon CO Rt 857 over Darnell Run

Fair

Monongalia County, West Virginia · 0.02 MI South CO Rt 69/2 · Structure no. 00000000031A208

Built
1936
89 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Masonry
Length
27 ft
1 main span
Daily traffic
1,800
2020 count
Owner
State
State Highway Agency

About this bridge

Mon CO Rt 857 over Darnell Run is a masonry arch - deck carrying Mon CO Rt 857 over Darnell Run in Monongalia County, West Virginia. It was built in 1936, so it is 89 years old, older 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 1,800 vehicles a day, roughly 6% of them trucks, projected to reach 2,790 by 2041. The structure is 27 ft (8.2 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesMon CO Rt 857
CrossesDarnell Run
Location0.02 MI South CO Rt 69/2
RouteCounty Highway 85700
CountyMonongalia County
StateWest Virginia
Coordinates39.69711, -79.81673
Functional classRural Major 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating70 US tons
Inventory rating32 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2020)
Projected traffic2,790 by 2041
Trucks6%
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$554,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mon CO Rt 857 over Darnell Run built?

It was built in 1936, making it 89 years old in 2025.

What condition is Mon CO Rt 857 over Darnell 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 March 2023.

How much traffic does Mon CO Rt 857 over Darnell Run carry?

About 1,800 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Mon CO Rt 857 over Darnell Run?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 36 ft wide.

Who owns Mon CO Rt 857 over Darnell Run?

It is owned by the State Highway Agency.