US Bridges

Waterloo Rd/ FAS 8 over Gerhardt Creek

Poor

St. Clair County, Illinois · 0.01MI N Stc-Mon LN · Structure no. 082303500000000

Built
1961
64 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
117 ft
3 main spans
Daily traffic
1,850
2019 count
Owner
County
County Highway Agency

About this bridge

Waterloo Rd/ FAS 8 over Gerhardt Creek is a steel continuous stringer/multi-beam or girder carrying Waterloo Rd/ FAS 8 over Gerhardt Creek in St. Clair County, Illinois. It was built in 1961, so it is 64 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 1,850 vehicles a day, projected to reach 1,566 by 2046. The structure is 117 ft (35.7 m) long and 34 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

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CarriesWaterloo Rd/ FAS 8
CrossesGerhardt Creek
Location0.01MI N Stc-Mon LN
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.36911, -90.09226
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span42 ft (12.8 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2019)
Projected traffic1,566 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 Waterloo Rd/ FAS 8 over Gerhardt Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Waterloo Rd/ FAS 8 over Gerhardt 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 April 2024.

How much traffic does Waterloo Rd/ FAS 8 over Gerhardt Creek carry?

About 1,850 vehicles per day (2019 count).

How long is Waterloo Rd/ FAS 8 over Gerhardt Creek?

The structure is 117 ft (35.7 m) long with a longest span of 42 ft (12.8 m) and a deck 34 ft wide.

Who owns Waterloo Rd/ FAS 8 over Gerhardt Creek?

It is owned by the County Highway Agency.