US Bridges

Rynn Road over Oloughlin Drain

Fair

St. Clair County, Michigan · SEC.26-35 Kenockee Twp. · Structure no. 000000000010190

Built
1982
43 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
122
1994 count
Owner
County
County Highway Agency

About this bridge

Rynn Road over Oloughlin Drain is a prestressed concrete tee beam carrying Rynn Road over Oloughlin Drain in St. Clair County, Michigan. It was built in 1982, so it is 43 years old, younger than the Michigan average of 48.3 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.

It carries about 122 vehicles a day, roughly 3% of them trucks, projected to reach 155 by 2014. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRynn Road
CrossesOloughlin Drain
LocationSEC.26-35 Kenockee Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates43.00435, -82.66312
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122 (1994)
Projected traffic155 by 2014
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Rynn Road over Oloughlin Drain built?

It was built in 1982, making it 43 years old in 2025.

What condition is Rynn Road over Oloughlin Drain 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 Rynn Road over Oloughlin Drain carry?

About 122 vehicles per day (1994 count), of which roughly 3% are trucks.

How long is Rynn Road over Oloughlin Drain?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns Rynn Road over Oloughlin Drain?

It is owned by the County Highway Agency.