US Bridges

Illinois Jones RD over Still Branch

PoorPosted for load

Tangipahoa Parish, Louisiana · 1.5 M N JCT LA3080 &US190 · Structure no. 625330316903351

Built
1975
50 years old, rebuilt 2002
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
51 ft
3 main spans
Daily traffic
200
2019 count
Owner
County
County Highway Agency

About this bridge

Illinois Jones RD over Still Branch is a wood or timber stringer/multi-beam or girder carrying Illinois Jones RD over Still Branch in Tangipahoa Parish, Louisiana. It was built in 1975 and reconstructed in 2002, 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 200 vehicles a day, projected to reach 220 by 2039. The structure is 51 ft (15.5 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIllinois Jones RD
CrossesStill Branch
Location1.5 M N JCT LA3080 &US190
RouteCounty Highway 0
Coordinates30.52621, -90.55794
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25 US tons
Inventory rating17.5 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 10
Structure length51 ft (15.5 m)
Longest span18 ft (5.5 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2019)
Projected traffic220 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$201,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Illinois Jones RD over Still Branch built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2002.

What condition is Illinois Jones RD over Still Branch 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 April 2023.

How much traffic does Illinois Jones RD over Still Branch carry?

About 200 vehicles per day (2019 count).

How long is Illinois Jones RD over Still Branch?

The structure is 51 ft (15.5 m) long with a longest span of 18 ft (5.5 m) and a deck 19 ft wide.

Who owns Illinois Jones RD over Still Branch?

It is owned by the County Highway Agency.