US Bridges

Dwight RD TR-110 over West Fk Mazon River

Fair

Grundy County, Illinois · .09 MI S Gardner RD · Structure no. 032555600000000

Built
1977
48 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
325
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Dwight RD TR-110 over West Fk Mazon River is a prestressed concrete box beam or girders - multiple carrying Dwight RD TR-110 over West Fk Mazon River in Grundy County, Illinois. It was built in 1977, so it is 48 years old, older than the Illinois average of 45.3 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 325 vehicles a day, roughly 14% of them trucks, projected to reach 180 by 2046. The structure is 53 ft (16.2 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDwight RD TR-110
CrossesWest Fk Mazon River
Location.09 MI S Gardner RD
RouteCounty Highway 0
Coordinates41.15252, -88.43449
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span53 ft (16.2 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2024)
Projected traffic180 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Dwight RD TR-110 over West Fk Mazon River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Dwight RD TR-110 over West Fk Mazon River 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 October 2024.

How much traffic does Dwight RD TR-110 over West Fk Mazon River carry?

About 325 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Dwight RD TR-110 over West Fk Mazon River?

The structure is 53 ft (16.2 m) long with a longest span of 53 ft (16.2 m) and a deck 26 ft wide.

Who owns Dwight RD TR-110 over West Fk Mazon River?

It is owned by the Town or Township Highway Agency.