US Bridges

Gem RD over Lowes Br

PoorPosted for load

Linn County, Missouri · S 33 T 60 N R 20 W · Structure no. 15042

Built
1950
75 years old, rebuilt 2004
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
2 main spans
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Gem RD over Lowes Br is a steel stringer/multi-beam or girder carrying Gem RD over Lowes Br in Linn County, Missouri. It was built in 1950 and reconstructed in 2004, so it is 75 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 42 ft (12.8 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesGem RD
CrossesLowes Br
LocationS 33 T 60 N R 20 W
RouteCounty Highway 83
Coordinates39.9858, -93.15108
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating12.9 US tons
Inventory rating6.9 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans2
Design loadOther
Structure length42 ft (12.8 m)
Longest span31 ft (9.4 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$366,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gem RD over Lowes Br built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2004.

What condition is Gem RD over Lowes Br 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 Gem RD over Lowes Br carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Gem RD over Lowes Br?

The structure is 42 ft (12.8 m) long with a longest span of 31 ft (9.4 m) and a deck 14 ft wide.

Who owns Gem RD over Lowes Br?

It is owned by the County Highway Agency.