US Bridges

SW230 over Br of Montrose Lk

Fair

Henry County, Missouri · S 13 T 41 N R 28 W · Structure no. 30660

Built
2003
22 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

SW230 over Br of Montrose Lk is a steel stringer/multi-beam or girder carrying SW230 over Br of Montrose Lk in Henry County, Missouri. It was built in 2003, so it is 22 years old, younger 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 49 by 2043. The structure is 53 ft (16.2 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSW230
CrossesBr of Montrose Lk
LocationS 13 T 41 N R 28 W
RouteCounty Highway 280
Coordinates38.33894, -93.97401
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating16.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span51 ft (15.5 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic49 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 SW230 over Br of Montrose Lk built?

It was built in 2003, making it 22 years old in 2025.

What condition is SW230 over Br of Montrose Lk 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 March 2023.

How much traffic does SW230 over Br of Montrose Lk carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SW230 over Br of Montrose Lk?

The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 19 ft wide.

Who owns SW230 over Br of Montrose Lk?

It is owned by the County Highway Agency.