US Bridges

Unadilla Road over Unnamed Creek

Fair

Livingston County, Michigan · Sec 35 Unadilla Twp · Structure no. 000000000005829

Built
1981
44 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
2,146
2013 count
Owner
County
County Highway Agency

About this bridge

Unadilla Road over Unnamed Creek is a steel culvert carrying Unadilla Road over Unnamed Creek in Livingston County, Michigan. It was built in 1981, so it is 44 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 5 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 2,146 vehicles a day, projected to reach 1,288 by 2028. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUnadilla Road
CrossesUnnamed Creek
LocationSec 35 Unadilla Twp
RouteCounty Highway 4717
CountyLivingston County
StateMichigan
Coordinates42.42876, -84.05787
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating72.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,146 (2013)
Projected traffic1,288 by 2028
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Unadilla Road over Unnamed Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Unadilla Road over Unnamed 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 June 2024.

How much traffic does Unadilla Road over Unnamed Creek carry?

About 2,146 vehicles per day (2013 count).

How long is Unadilla Road over Unnamed Creek?

The structure is 22 ft (6.7 m) long with a longest span of 9 ft (2.7 m).

Who owns Unadilla Road over Unnamed Creek?

It is owned by the County Highway Agency.