US Bridges

Rt Zz S over Truman Reservoir

Fair

St. Clair County, Missouri · S 3 T 39 N R 24 W · Structure no. 3214

Built
1978
47 years old, rebuilt 2020
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,720 ft
11 main spans
Daily traffic
306
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Zz S over Truman Reservoir is a steel continuous stringer/multi-beam or girder carrying Rt Zz S over Truman Reservoir in St. Clair County, Missouri. It was built in 1978 and reconstructed in 2020, so it is 47 years old, older than the Missouri average of 45.1 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 306 vehicles a day, roughly 10% of them trucks, projected to reach 398 by 2044. The structure is 1,720 ft (524.3 m) long and 29 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesRt Zz S
CrossesTruman Reservoir
LocationS 3 T 39 N R 24 W
RouteState Highway 0ZZ
CountySt. Clair County
StateMissouri
Coordinates38.17762, -93.54631
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadH 15
Structure length1,720 ft (524.3 m)
Longest span162 ft (49.5 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic306 (2024)
Projected traffic398 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Zz S over Truman Reservoir built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2020.

What condition is Rt Zz S over Truman Reservoir 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 August 2024.

How much traffic does Rt Zz S over Truman Reservoir carry?

About 306 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt Zz S over Truman Reservoir?

The structure is 1,720 ft (524.3 m) long with a longest span of 162 ft (49.5 m) and a deck 29 ft wide.

Who owns Rt Zz S over Truman Reservoir?

It is owned by the State Highway Agency.