US Bridges

Carson RD over Mill Creek

Poor

East Baton Rouge Parish, Louisiana · 1.6 Mi. Se. of Pride · Structure no. 611730411905721

Built
1970
55 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
115
2019 count
Owner
County
County Highway Agency

About this bridge

Carson RD over Mill Creek is a concrete slab carrying Carson RD over Mill Creek in East Baton Rouge 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 115 vehicles a day, projected to reach 126 by 2039. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCarson RD
CrossesMill Creek
Location1.6 Mi. Se. of Pride
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.68539, -90.95428
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating25 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2019)
Projected traffic126 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$274,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Carson RD over Mill Creek built?

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

What condition is Carson RD over Mill Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Carson RD over Mill Creek carry?

About 115 vehicles per day (2019 count).

How long is Carson RD over Mill Creek?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Carson RD over Mill Creek?

It is owned by the County Highway Agency.