US Bridges

TR-49 (stockdale R over Obrien Run

Fair

Grundy County, Illinois · .20 MI E TR 70 · Structure no. 032406100000000

Built
1984
41 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
325
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-49 (stockdale R over Obrien Run is a prestressed concrete box beam or girders - multiple carrying TR-49 (stockdale R over Obrien Run in Grundy County, Illinois. It was built in 1984, so it is 41 years old, younger 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 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 325 vehicles a day, roughly 18% of them trucks, projected to reach 210 by 2046. The structure is 56 ft (17.2 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesTR-49 (stockdale R
CrossesObrien Run
Location.20 MI E TR 70
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.35593, -88.51353
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating32.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span54 ft (16.4 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2024)
Projected traffic210 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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-49 (stockdale R over Obrien Run built?

It was built in 1984, making it 41 years old in 2025.

What condition is TR-49 (stockdale R over Obrien Run 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 September 2024.

How much traffic does TR-49 (stockdale R over Obrien Run carry?

About 325 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is TR-49 (stockdale R over Obrien Run?

The structure is 56 ft (17.2 m) long with a longest span of 54 ft (16.4 m) and a deck 27 ft wide.

Who owns TR-49 (stockdale R over Obrien Run?

It is owned by the Town or Township Highway Agency.