Dummyline RD over Black River

Good Condition36 years old1,563 vehicles/day

Location

StateLouisiana
CountySt. Tammany
Location1.54 M W Of La 1077
CarriesDummyline RD
CrossesBlack River
Coordinates30.43207, -90.18131

Condition Ratings

Overall ConditionGood
Channel/Waterway6 (Satisfactory)
Culvert7 (Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length24.0 ft (7.3 m)
Max Span9.8 ft (3 m)
Deck Width55.1 ft (16.8 m)
Deck Area122.6 sq m
Main Spans2
Year Built1990

Traffic

Avg Daily Traffic1,563 (2017)
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number625230259901071

Nearby Bridges