US Bridges

Dawson RD / Ch 16 over I-72 / US 36

Fair

Sangamon County, Illinois · 4.5M E Sangamon R. · Structure no. 084015500000000

Built
1975
50 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
249 ft
2 main spans
Daily traffic
550
2022 count
Owner
State
State Highway Agency

About this bridge

Dawson RD / Ch 16 over I-72 / US 36 is a steel continuous box beam or girders - single or spread carrying Dawson RD / Ch 16 over I-72 / US 36 in Sangamon County, Illinois. It was built in 1975, so it is 50 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 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 550 vehicles a day, roughly 7% of them trucks, projected to reach 556 by 2046. The structure is 249 ft (76 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesDawson RD / Ch 16
CrossesI-72 / US 36
Location4.5M E Sangamon R.
RouteCounty Highway 0
CountySangamon County
StateIllinois
Coordinates39.83904, -89.46344
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length249 ft (76 m)
Longest span107 ft (32.6 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2022)
Projected traffic556 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dawson RD / Ch 16 over I-72 / US 36 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Dawson RD / Ch 16 over I-72 / US 36 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 December 2024.

How much traffic does Dawson RD / Ch 16 over I-72 / US 36 carry?

About 550 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Dawson RD / Ch 16 over I-72 / US 36?

The structure is 249 ft (76 m) long with a longest span of 107 ft (32.6 m) and a deck 36 ft wide.

Who owns Dawson RD / Ch 16 over I-72 / US 36?

It is owned by the State Highway Agency.