US Bridges

Wv 84 over Knapp Creek

Poor

Pocahontas County, West Virginia · 2.42 Miles East WV92 · Structure no. 00000000038A130

Built
2008
17 years old
Condition
Poor
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
350
2019 count
Owner
State
State Highway Agency

About this bridge

Wv 84 over Knapp Creek is a prestressed concrete box beam or girders - multiple carrying Wv 84 over Knapp Creek in Pocahontas County, West Virginia. It was built in 2008, so it is 17 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 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.

It carries about 350 vehicles a day, roughly 11% of them trucks, projected to reach 411 by 2039. The structure is 69 ft (20.9 m) long and 31 ft wide.

CarriesWv 84
CrossesKnapp Creek
Location2.42 Miles East WV92
RouteState Highway 8400
Coordinates38.27672, -79.83749
Functional classRural Major Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length69 ft (20.9 m)
Longest span64 ft (19.5 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2019)
Projected traffic411 by 2039
Trucks11%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$900,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wv 84 over Knapp Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Wv 84 over Knapp Creek 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 March 2023.

How much traffic does Wv 84 over Knapp Creek carry?

About 350 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is Wv 84 over Knapp Creek?

The structure is 69 ft (20.9 m) long with a longest span of 64 ft (19.5 m) and a deck 31 ft wide.

Who owns Wv 84 over Knapp Creek?

It is owned by the State Highway Agency.