US Bridges

8490 S over Is 44

Fair

Phelps County, Missouri · S 8 T 37 N R 9 W · Structure no. 1320

Built
1966
59 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
208 ft
4 main spans
Daily traffic
262
2024 count
Owner
State
State Highway Agency

About this bridge

8490 S over Is 44 is a concrete continuous slab carrying 8490 S over Is 44 in Phelps County, Missouri. It was built in 1966, so it is 59 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 6 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 262 vehicles a day, roughly 11% of them trucks, projected to reach 393 by 2044. The structure is 208 ft (63.4 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries8490 S
CrossesIs 44
LocationS 8 T 37 N R 9 W
RouteCounty Highway 8490
CountyPhelps County
StateMissouri
Coordinates37.94357, -91.9365
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 rating42.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length208 ft (63.4 m)
Longest span61 ft (18.6 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic262 (2024)
Projected traffic393 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 8490 S over Is 44 built?

It was built in 1966, making it 59 years old in 2025.

What condition is 8490 S over Is 44 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 May 2023.

How much traffic does 8490 S over Is 44 carry?

About 262 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is 8490 S over Is 44?

The structure is 208 ft (63.4 m) long with a longest span of 61 ft (18.6 m) and a deck 31 ft wide.

Who owns 8490 S over Is 44?

It is owned by the State Highway Agency.