US Bridges

Serenity Rd. over Coulee

PoorClosed to traffic

Lafayette Parish, Louisiana · 0.3 Mi. West of Bonin RD · Structure no. 032830078920071

Built
1972
53 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
30 ft
2 main spans
Daily traffic
40
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Serenity Rd. over Coulee is a wood or timber stringer/multi-beam or girder carrying Serenity Rd. over Coulee in Lafayette Parish, Louisiana. It was built in 1972, so it is 53 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 1 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. Its operating status is: closed to all traffic.

It carries about 40 vehicles a day, projected to reach 44 by 2040. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSerenity Rd.
CrossesCoulee
Location0.3 Mi. West of Bonin RD
RouteCounty Highway 0
CountyLafayette Parish
StateLouisiana
Coordinates30.13091, -92.01229
Functional classUrban 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating21.2 US tons
Inventory rating15 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length30 ft (9.1 m)
Longest span15 ft (4.6 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic44 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$141,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Serenity Rd. over Coulee built?

It was built in 1972, making it 53 years old in 2025.

What condition is Serenity Rd. over Coulee 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 October 2024.

How much traffic does Serenity Rd. over Coulee carry?

About 40 vehicles per day (2020 count).

How long is Serenity Rd. over Coulee?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m) and a deck 22 ft wide.

Who owns Serenity Rd. over Coulee?

It is owned by the City or Municipal Highway Agency.