US Bridges

Humphreys Access over Platte Rvr

Fair

Platte County, Missouri · S 10 T 52 N R 35 W · Structure no. 30597

Built
2004
21 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
450 ft
3 main spans
Daily traffic
400
2024 count
Owner
County
County Highway Agency

About this bridge

Humphreys Access over Platte Rvr is a steel continuous stringer/multi-beam or girder carrying Humphreys Access over Platte Rvr in Platte County, Missouri. It was built in 2004, so it is 21 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 400 vehicles a day, roughly 10% of them trucks, projected to reach 740 by 2044. The structure is 450 ft (137.2 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesHumphreys Access
CrossesPlatte Rvr
LocationS 10 T 52 N R 35 W
RouteCounty Highway 175
CountyPlatte County
StateMissouri
Coordinates39.33511, -94.81552
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88.3 US tons
Inventory rating52.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length450 ft (137.2 m)
Longest span17 ft (5.2 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2024)
Projected traffic740 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Humphreys Access over Platte Rvr built?

It was built in 2004, making it 21 years old in 2025.

What condition is Humphreys Access over Platte Rvr in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Humphreys Access over Platte Rvr carry?

About 400 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Humphreys Access over Platte Rvr?

The structure is 450 ft (137.2 m) long with a longest span of 17 ft (5.2 m) and a deck 32 ft wide.

Who owns Humphreys Access over Platte Rvr?

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