US Bridges

CO HWY 16 FAS 355 over Diamond Creek

Poor

Livingston County, Illinois · 1.5 MI S Longpoint · Structure no. 053303200000000

Built
1933
92 years old
Condition
Poor
inspected July 2023
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
725
2023 count
Owner
County
County Highway Agency

About this bridge

CO HWY 16 FAS 355 over Diamond Creek is a concrete tee beam carrying CO HWY 16 FAS 355 over Diamond Creek in Livingston County, Illinois. It was built in 1933, so it is 92 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 725 vehicles a day, roughly 11% of them trucks, projected to reach 657 by 2046. The structure is 43 ft (13.2 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCO HWY 16 FAS 355
CrossesDiamond Creek
Location1.5 MI S Longpoint
RouteCounty Highway 0
CountyLivingston County
StateIllinois
Coordinates40.98955, -88.87301
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be 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 rating57.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length43 ft (13.2 m)
Longest span42 ft (12.7 m)
Deck width35 ft (10.8 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic725 (2023)
Projected traffic657 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CO HWY 16 FAS 355 over Diamond Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is CO HWY 16 FAS 355 over Diamond Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does CO HWY 16 FAS 355 over Diamond Creek carry?

About 725 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is CO HWY 16 FAS 355 over Diamond Creek?

The structure is 43 ft (13.2 m) long with a longest span of 42 ft (12.7 m) and a deck 35 ft wide.

Who owns CO HWY 16 FAS 355 over Diamond Creek?

It is owned by the County Highway Agency.