US Bridges

TR 305 over Coop Branch

Good

Macoupin County, Illinois · 3 M NE Medora · Structure no. 059310600000000

Built
2010
15 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
116 ft
3 main spans
Daily traffic
20
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 305 over Coop Branch is a prestressed concrete box beam or girders - multiple carrying TR 305 over Coop Branch in Macoupin County, Illinois. It was built in 2010, so it is 15 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 20 vehicles a day, roughly 5% of them trucks, projected to reach 20 by 2046. The structure is 116 ft (35.4 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesTR 305
CrossesCoop Branch
Location3 M NE Medora
RouteCounty Highway 0
CountyMacoupin County
StateIllinois
Coordinates39.1967, -90.09163
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length116 ft (35.4 m)
Longest span38 ft (11.7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 305 over Coop Branch built?

It was built in 2010, making it 15 years old in 2025.

What condition is TR 305 over Coop Branch 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 February 2023.

How much traffic does TR 305 over Coop Branch carry?

About 20 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is TR 305 over Coop Branch?

The structure is 116 ft (35.4 m) long with a longest span of 38 ft (11.7 m) and a deck 27 ft wide.

Who owns TR 305 over Coop Branch?

It is owned by the Town or Township Highway Agency.