US Bridges

County RD 8390 over Br of Spring CR

Good

Phelps County, Missouri · S 4 T 38 N R 8 W · Structure no. 28363

Built
1999
26 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 8390 over Br of Spring CR is a concrete slab carrying County RD 8390 over Br of Spring CR in Phelps County, Missouri. It was built in 1999, so it is 26 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 65 by 2044. The structure is 27 ft (8.2 m) long and 23 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesCounty RD 8390
CrossesBr of Spring CR
LocationS 4 T 38 N R 8 W
RouteCounty Highway 31
CountyPhelps County
StateMissouri
Coordinates38.0385, -91.8164
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadOther
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic65 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 8390 over Br of Spring CR built?

It was built in 1999, making it 26 years old in 2025.

What condition is County RD 8390 over Br of Spring CR 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 2023.

How much traffic does County RD 8390 over Br of Spring CR carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 8390 over Br of Spring CR?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 23 ft wide.

Who owns County RD 8390 over Br of Spring CR?

It is owned by the County Highway Agency.