US Bridges

Koke Mill Road 729 over Spring Creek

Fair

Sangamon County, Illinois · 100 Feet NO.FAU7977 · Structure no. 084800100000000

Built
1984
41 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
1,100
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Koke Mill Road 729 over Spring Creek is a concrete continuous culvert carrying Koke Mill Road 729 over Spring Creek in Sangamon 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 1,100 vehicles a day, roughly 2% of them trucks, projected to reach 1,111 by 2046. The structure is 33 ft (10 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKoke Mill Road 729
CrossesSpring Creek
Location100 Feet NO.FAU7977
RouteCity Street 0
CountySangamon County
StateIllinois
Coordinates39.80174, -89.71574
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70 US tons
Inventory rating41.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length33 ft (10 m)
Longest span11 ft (3.3 m)
Deck width39 ft (12 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2022)
Projected traffic1,111 by 2046
Trucks2%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Koke Mill Road 729 over Spring Creek built?

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

What condition is Koke Mill Road 729 over Spring Creek 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 April 2023.

How much traffic does Koke Mill Road 729 over Spring Creek carry?

About 1,100 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Koke Mill Road 729 over Spring Creek?

The structure is 33 ft (10 m) long with a longest span of 11 ft (3.3 m) and a deck 39 ft wide.

Who owns Koke Mill Road 729 over Spring Creek?

It is owned by the City or Municipal Highway Agency.