US Bridges

Manor RD over Br of Sights Br

Good

Linn County, Missouri · S 33 T 58 N R 18 W · Structure no. 24375

Built
1989
36 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Manor RD over Br of Sights Br is a steel stringer/multi-beam or girder carrying Manor RD over Br of Sights Br in Linn County, Missouri. It was built in 1989, so it is 36 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2044. The structure is 46 ft (14 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesManor RD
CrossesBr of Sights Br
LocationS 33 T 58 N R 18 W
RouteCounty Highway 484
CountyLinn County
StateMissouri
Coordinates39.79462, -92.91719
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic39 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$260,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Manor RD over Br of Sights Br built?

It was built in 1989, making it 36 years old in 2025.

What condition is Manor RD over Br of Sights Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Manor RD over Br of Sights Br carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Manor RD over Br of Sights Br?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 16 ft wide.

Who owns Manor RD over Br of Sights Br?

It is owned by the County Highway Agency.