US Bridges

Ithaca RD over Unnamed Str

PoorPosted for load

Linn County, Missouri · S 8 T 58 N R 19 W · Structure no. 19075

Built
1930
95 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

Ithaca RD over Unnamed Str is a steel stringer/multi-beam or girder carrying Ithaca RD over Unnamed Str in Linn 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 22 by 2044. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIthaca RD
CrossesUnnamed Str
LocationS 8 T 58 N R 19 W
RouteCounty Highway 210
Coordinates39.85268, -93.04402
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.8 US tons
Inventory rating14.9 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic22 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$289,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ithaca RD over Unnamed Str built?

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

What condition is Ithaca RD over Unnamed Str 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 November 2024.

How much traffic does Ithaca RD over Unnamed Str carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Ithaca RD over Unnamed Str?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns Ithaca RD over Unnamed Str?

It is owned by the County Highway Agency.