US Bridges

Chester Diez RD over New River

Fair

Ascension Parish, Louisiana · 0.2 MI E I-10 LA429 · Structure no. 610330146905801

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
250
2019 count
Owner
County
County Highway Agency

About this bridge

Chester Diez RD over New River is a concrete slab carrying Chester Diez RD over New River in Ascension Parish, Louisiana. It was built in 1970, so it is 55 years old, older than the Louisiana average of 43 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 250 vehicles a day, projected to reach 275 by 2039. The structure is 60 ft (18.3 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesChester Diez RD
CrossesNew River
Location0.2 MI E I-10 LA429
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.24063, -90.96744
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic275 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Chester Diez RD over New River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Chester Diez RD over New River 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 February 2023.

How much traffic does Chester Diez RD over New River carry?

About 250 vehicles per day (2019 count).

How long is Chester Diez RD over New River?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns Chester Diez RD over New River?

It is owned by the County Highway Agency.