US Bridges

SP 69 S over Is 35

PoorPosted for load

Clay County, Missouri · S 32 T 51 N R 32 W · Structure no. 6410

Built
1954
71 years old, rebuilt 1977
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
406 ft
4 main spans
Daily traffic
1,934
2024 count
Owner
State
State Highway Agency

About this bridge

SP 69 S over Is 35 is a steel continuous stringer/multi-beam or girder carrying SP 69 S over Is 35 in Clay County, Missouri. It was built in 1954 and reconstructed in 1977, so it is 71 years old, older than the Missouri average of 45.1 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. Its operating status is: posted for load restriction.

It carries about 1,934 vehicles a day, roughly 5% of them trucks, projected to reach 3,094 by 2044. The structure is 406 ft (123.7 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSP 69 S
CrossesIs 35
LocationS 32 T 51 N R 32 W
RouteState Highway 69
Coordinates39.1872, -94.51664
Functional classUrban Minor Arterial

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.5 US tons
Inventory rating36.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length406 ft (123.7 m)
Longest span120 ft (36.6 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,934 (2024)
Projected traffic3,094 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SP 69 S over Is 35 built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1977.

What condition is SP 69 S over Is 35 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 September 2024.

How much traffic does SP 69 S over Is 35 carry?

About 1,934 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is SP 69 S over Is 35?

The structure is 406 ft (123.7 m) long with a longest span of 120 ft (36.6 m) and a deck 32 ft wide.

Who owns SP 69 S over Is 35?

It is owned by the State Highway Agency.