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Corrosion Map for Metal Pipes in Costal Louisiana

Description :  

Transportation agencies often allow metal pipes as an option for cross drains under/along roads and highways. Metal culverts can corrode over time and at various rates based on their environmental conditions (corrosive nature of costal soils, high water table, saltwater intrusion, subsidence, tidal flows and frequent hurricane surge issues.) These salinity issues increase rates of corrosion and have led to a policy of disallowing the use of metal pipes for new drainage installations in District 02 (the New Orleans area) that is mostly costal. Other districts (07, 03, 61 and 62) also have some costal edges, but extend far enough north where environmental issues are less corrosive. There is a balance among maintenance, repair costs and material competition. For example: in less corrosive areas, allowing metal pipe fosters competition and cost-savings to the department. Therefore, delineating zones where corrosion rates are tolerable/intolerable would continue to promote competition in the north and provide/ensure only durable materials for our costal areas. Predelineated zones would also reduce the testing required for pipe material determinations.


The objective is to create a guidance document with maps that delineate a zone where metal pipes should not be utilized along the coast based on high corrosion rates from increased salinity. The project results will support the guidance document, map and provide rational logic to support DOTD with the decision to implement.

Principal Investigator:  Tewari, Sanjay  --  Civil Engineering and Construction Engineering Technology
Funding Agencies:  LTRC
Amount Awarded:  49,999

Start Period:  00/00/0000 End Period:  00/00/0000
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November 16th, 2018

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