US Bridges

SR 99 over Seymour Creek

FairPosted for load

Huron County, Ohio · 1.0 Miles North of USR20 · Structure no. 3902498

Built
1938
87 years old, rebuilt 1975
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
76 ft
3 main spans
Daily traffic
3,322
2015 count
Owner
State
State Highway Agency

About this bridge

SR 99 over Seymour Creek is a steel continuous stringer/multi-beam or girder carrying SR 99 over Seymour Creek in Huron County, Ohio. It was built in 1938 and reconstructed in 1975, so it is 87 years old, older than the Ohio average of 47.3 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. Its operating status is: posted for load restriction.

It carries about 3,322 vehicles a day, roughly 18% of them trucks, projected to reach 4,611 by 2035. The structure is 76 ft (23.2 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 99
CrossesSeymour Creek
Location1.0 Miles North of USR20
RouteState Highway 99
CountyHuron County
StateOhio
Coordinates41.26235, -82.71205
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length76 ft (23.2 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,322 (2015)
Projected traffic4,611 by 2035
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 99 over Seymour Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1975.

What condition is SR 99 over Seymour Creek 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 2024.

How much traffic does SR 99 over Seymour Creek carry?

About 3,322 vehicles per day (2015 count), of which roughly 18% are trucks.

How long is SR 99 over Seymour Creek?

The structure is 76 ft (23.2 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns SR 99 over Seymour Creek?

It is owned by the State Highway Agency.