US Bridges

CR 34 (21/N) over Tiffin River

Good

Williams County, Ohio · 07400 RD 21/N · Structure no. 8632820

Built
1999
26 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
677
2015 count
Owner
County
County Highway Agency

About this bridge

CR 34 (21/N) over Tiffin River is a prestressed concrete box beam or girders - multiple carrying CR 34 (21/N) over Tiffin River in Williams County, Ohio. It was built in 1999, so it is 26 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 677 vehicles a day, roughly 8% of them trucks, projected to reach 940 by 2035. The structure is 165 ft (50.3 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCR 34 (21/N)
CrossesTiffin River
Location07400 RD 21/N
RouteCounty Highway C0034
StateOhio
Coordinates41.51931, -84.40531
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length165 ft (50.3 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic677 (2015)
Projected traffic940 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 34 (21/N) over Tiffin River built?

It was built in 1999, making it 26 years old in 2025.

What condition is CR 34 (21/N) over Tiffin River 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 October 2024.

How much traffic does CR 34 (21/N) over Tiffin River carry?

About 677 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is CR 34 (21/N) over Tiffin River?

The structure is 165 ft (50.3 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns CR 34 (21/N) over Tiffin River?

It is owned by the County Highway Agency.