US Bridges

Rt Aa S over Routon Hollow

Fair

Morgan County, Missouri · S 4 T 41 N R 16 W · Structure no. 1841

Built
1967
58 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
808
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Routon Hollow is a concrete continuous culvert carrying Rt Aa S over Routon Hollow in Morgan County, Missouri. It was built in 1967, so it is 58 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 808 vehicles a day, roughly 5% of them trucks, projected to reach 1,495 by 2044. The structure is 26 ft (8 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesRt Aa S
CrossesRouton Hollow
LocationS 4 T 41 N R 16 W
RouteState Highway 0AA
CountyMorgan County
StateMissouri
Coordinates38.3487, -92.70261
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length26 ft (8 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic808 (2024)
Projected traffic1,495 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 Aa S over Routon Hollow built?

It was built in 1967, making it 58 years old in 2025.

What condition is Rt Aa S over Routon 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 December 2023.

How much traffic does Rt Aa S over Routon Hollow carry?

About 808 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Rt Aa S over Routon Hollow?

The structure is 26 ft (8 m) long with a longest span of 11 ft (3.4 m).

Who owns Rt Aa S over Routon Hollow?

It is owned by the State Highway Agency.