US Bridges

TR 316A over Spillway

Good

Montgomery County, Illinois · 3.0 MI S Coffeen · Structure no. 068990700000000

Built
1964
61 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
75
2020 count
Owner
Private
Private (other than railroad)

About this bridge

TR 316A over Spillway is a prestressed concrete box beam or girders - multiple carrying TR 316A over Spillway in Montgomery County, Illinois. It was built in 1964, so it is 61 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 4% of them trucks, projected to reach 76 by 2046. The structure is 62 ft (18.9 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 316A
CrossesSpillway
Location3.0 MI S Coffeen
RouteCounty Highway 0
Coordinates39.03728, -89.38503
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width28 ft (8.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2020)
Projected traffic76 by 2046
Trucks4%
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

OwnerPrivate (other than railroad)
Maintained byPrivate (other than railroad)
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 316A over Spillway built?

It was built in 1964, making it 61 years old in 2025.

What condition is TR 316A over Spillway 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 January 2024.

How much traffic does TR 316A over Spillway carry?

About 75 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is TR 316A over Spillway?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 28 ft wide.

Who owns TR 316A over Spillway?

It is owned by the Private (other than railroad).