US Bridges

County RD NW 1101 over Ditty CR

PoorPosted for load

St. Clair County, Missouri · S 26 T 39 N R 28 W · Structure no. 32867

Built
1930
95 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD NW 1101 over Ditty CR is a steel stringer/multi-beam or girder carrying County RD NW 1101 over Ditty CR in St. Clair County, Missouri. It was built in 1930, so it is 95 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2043. The structure is 23 ft (7 m) long and 14 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCounty RD NW 1101
CrossesDitty CR
LocationS 26 T 39 N R 28 W
RouteCounty Highway 15
CountySt. Clair County
StateMissouri
Coordinates38.1303, -93.9801
Functional classRural Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: 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 rating15.9 US tons
Inventory rating9.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic30 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$239,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD NW 1101 over Ditty CR built?

It was built in 1930, making it 95 years old in 2025.

What condition is County RD NW 1101 over Ditty CR 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 December 2023.

How much traffic does County RD NW 1101 over Ditty CR carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD NW 1101 over Ditty CR?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 14 ft wide.

Who owns County RD NW 1101 over Ditty CR?

It is owned by the County Highway Agency and maintained by the Other Local Agency.