US Bridges

Brook RD over Br of Parsons CR

Poor

Linn County, Missouri · S 6 T 59 N R 21 W · Structure no. 13522

Built
1955
70 years old, rebuilt 1989
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
30 ft
2 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

Brook RD over Br of Parsons CR is a steel continuous stringer/multi-beam or girder carrying Brook RD over Br of Parsons CR in Linn County, Missouri. It was built in 1955 and reconstructed in 1989, so it is 70 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.

It carries about 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 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).

Location

Open in Google Maps
CarriesBrook RD
CrossesBr of Parsons CR
LocationS 6 T 59 N R 21 W
RouteCounty Highway 40
CountyLinn County
StateMissouri
Coordinates39.95424, -93.26944
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length30 ft (9.1 m)
Longest span19 ft (5.8 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$196,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Brook RD over Br of Parsons CR built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1989.

What condition is Brook RD over Br of Parsons 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 2024.

How much traffic does Brook RD over Br of Parsons CR carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Brook RD over Br of Parsons CR?

The structure is 30 ft (9.1 m) long with a longest span of 19 ft (5.8 m) and a deck 16 ft wide.

Who owns Brook RD over Br of Parsons CR?

It is owned by the County Highway Agency.