US Bridges

Blackmon RD over Six Mile Creek

Good

Vernon Parish, Louisiana · 0.7 M. SW of LA 377 · Structure no. 085830543925401

Built
2002
23 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
150
2001 count
Owner
County
County Highway Agency

About this bridge

Blackmon RD over Six Mile Creek is a concrete slab carrying Blackmon RD over Six Mile Creek in Vernon Parish, Louisiana. It was built in 2002, so it is 23 years old, younger than the Louisiana average of 43 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 150 vehicles a day, projected to reach 165 by 2021. The structure is 100 ft (30.5 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesBlackmon RD
CrossesSix Mile Creek
Location0.7 M. SW of LA 377
RouteCounty Highway 0
Coordinates30.9052, -92.8995
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.3 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2001)
Projected traffic165 by 2021
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackmon RD over Six Mile Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Blackmon RD over Six Mile Creek 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 July 2023.

How much traffic does Blackmon RD over Six Mile Creek carry?

About 150 vehicles per day (2001 count).

How long is Blackmon RD over Six Mile Creek?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Blackmon RD over Six Mile Creek?

It is owned by the County Highway Agency.