US Bridges

Shingle Mill RD over Anderson Canal

PoorPosted for load

Tangipahoa Parish, Louisiana · 0.3 N. of Rt. 142 Millrd · Structure no. 625330252902881

Built
1975
50 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
77 ft
4 main spans
Daily traffic
10
2019 count
Owner
County
County Highway Agency

About this bridge

Shingle Mill RD over Anderson Canal is a wood or timber stringer/multi-beam or girder carrying Shingle Mill RD over Anderson Canal in Tangipahoa 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 3 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 10 vehicles a day, projected to reach 11 by 2039. The structure is 77 ft (23.5 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesShingle Mill RD
CrossesAnderson Canal
Location0.3 N. of Rt. 142 Millrd
RouteCounty Highway 0
CountyTangipahoa Parish
StateLouisiana
Coordinates30.42072, -90.48006
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.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.3 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length77 ft (23.5 m)
Longest span19 ft (5.8 m)
Deck width15 ft (4.6 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2019)
Projected traffic11 by 2039
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

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$277,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Shingle Mill RD over Anderson Canal built?

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

What condition is Shingle Mill RD over Anderson Canal 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 May 2024.

How much traffic does Shingle Mill RD over Anderson Canal carry?

About 10 vehicles per day (2019 count).

How long is Shingle Mill RD over Anderson Canal?

The structure is 77 ft (23.5 m) long with a longest span of 19 ft (5.8 m) and a deck 15 ft wide.

Who owns Shingle Mill RD over Anderson Canal?

It is owned by the County Highway Agency.