US Bridges

TR-351 over Little Mill Creek

Good

Adams County, Illinois · 0.02 MI W TR 152 · Structure no. 001502100000000

Built
2015
10 years old
Condition
Good
inspected September 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
250
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-351 over Little Mill Creek is a concrete continuous culvert carrying TR-351 over Little Mill Creek in Adams County, Illinois. It was built in 2015, so it is 10 years old, younger than the Illinois average of 45.3 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 250 vehicles a day, roughly 6% of them trucks, projected to reach 253 by 2046. The structure is 21 ft (6.3 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTR-351
CrossesLittle Mill Creek
Location0.02 MI W TR 152
RouteCounty Highway 0
Coordinates39.94931, -91.29643
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length21 ft (6.3 m)
Longest span11 ft (3.3 m)
Deck width31 ft (9.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2024)
Projected traffic253 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR-351 over Little Mill Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is TR-351 over Little Mill Creek 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 September 2022.

How much traffic does TR-351 over Little Mill Creek carry?

About 250 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is TR-351 over Little Mill Creek?

The structure is 21 ft (6.3 m) long with a longest span of 11 ft (3.3 m) and a deck 31 ft wide.

Who owns TR-351 over Little Mill Creek?

It is owned by the Town or Township Highway Agency.