US Bridges

Mo 99 S over Pine Hollow

Fair

Oregon County, Missouri · S 31 T 26 N R 5 W · Structure no. 5625

Built
1932
93 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
305
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 99 S over Pine Hollow is a concrete continuous culvert carrying Mo 99 S over Pine Hollow in Oregon County, Missouri. It was built in 1932, so it is 93 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 305 vehicles a day, roughly 23% of them trucks, projected to reach 427 by 2044. The structure is 21 ft (6.4 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesMo 99 S
CrossesPine Hollow
LocationS 31 T 26 N R 5 W
RouteState Highway 99
Coordinates36.87299, -91.53196
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic305 (2024)
Projected traffic427 by 2044
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Mo 99 S over Pine Hollow built?

It was built in 1932, making it 93 years old in 2025.

What condition is Mo 99 S over Pine Hollow 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 January 2024.

How much traffic does Mo 99 S over Pine Hollow carry?

About 305 vehicles per day (2024 count), of which roughly 23% are trucks.

How long is Mo 99 S over Pine Hollow?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns Mo 99 S over Pine Hollow?

It is owned by the State Highway Agency.