US Bridges

Sawmill Rd. over Coulee Datider

PoorPosted for load

St. Martin Parish, Louisiana · 1.3 Mi. W of LA 341 · Structure no. 035030199915631

Built
1975
50 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
1,100
2020 count
Owner
County
County Highway Agency

About this bridge

Sawmill Rd. over Coulee Datider is a concrete slab carrying Sawmill Rd. over Coulee Datider in St. Martin Parish, Louisiana. It was built in 1975, so it is 50 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. Its operating status is: posted for load restriction.

It carries about 1,100 vehicles a day, roughly 14% of them trucks, projected to reach 1,210 by 2040. The structure is 76 ft (23.2 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesSawmill Rd.
CrossesCoulee Datider
Location1.3 Mi. W of LA 341
RouteCounty Highway 0
CountySt. Martin Parish
StateLouisiana
Coordinates30.33237, -91.93844
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 rating44.6 US tons
Inventory rating34.3 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 width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2020)
Projected traffic1,210 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Sawmill Rd. over Coulee Datider built?

It was built in 1975, making it 50 years old in 2025.

What condition is Sawmill Rd. over Coulee Datider 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 Sawmill Rd. over Coulee Datider carry?

About 1,100 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is Sawmill Rd. over Coulee Datider?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns Sawmill Rd. over Coulee Datider?

It is owned by the County Highway Agency.