US Bridges

SR 554 over Unknown Stream

Good

Gallia County, Ohio · 7.35 Mi. West of SR 7 · Structure no. 2704013

Built
2005
20 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
1,803
2015 count
Owner
State
State Highway Agency

About this bridge

SR 554 over Unknown Stream is a concrete slab carrying SR 554 over Unknown Stream in Gallia County, Ohio. It was built in 2005, so it is 20 years old, younger than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,803 vehicles a day, roughly 8% of them trucks, projected to reach 2,503 by 2035. The structure is 23 ft (7 m) long and 34 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

CarriesSR 554
CrossesUnknown Stream
Location7.35 Mi. West of SR 7
RouteState Highway 554
StateOhio
Coordinates38.97574, -82.20825
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width34 ft (10.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,803 (2015)
Projected traffic2,503 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 554 over Unknown Stream built?

It was built in 2005, making it 20 years old in 2025.

What condition is SR 554 over Unknown Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does SR 554 over Unknown Stream carry?

About 1,803 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is SR 554 over Unknown Stream?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 34 ft wide.

Who owns SR 554 over Unknown Stream?

It is owned by the State Highway Agency.