New Orleans, LA Environmental Rules: Erosion Control (2026)

Section 146-582(a) makes it unlawful to terrace, grade or place fill on any lot or site, or part of one, in a manner that adversely alters the present natural drainage pattern of the area. Grading and filling requirements are kept on file with, and obtainable from, the Department of Streets, which must approve the specific method used to ensure water continues to drain effectively from the lot and the surrounding area. If the director of the Department of Streets finds a violation, the owner receives notice and has 60 days to bring the grading or fill into compliance.

If the owner fails to act, the department's maintenance division performs the corrective grading and fill itself, and charges the property owner for all labor, equipment and materials, including any additional fill needed (§ 146-582(b)). Unpaid bills become a lien recorded against the property in the mortgage office within 60 days of default (§ 146-582(c)). Any retaining wall built under this section must be constructed of concrete unless the city council approves an alternate material after consulting relevant departments on structural integrity (§ 146-582(d)). Subsection (e) separately and unconditionally bars grading or filling that lets runoff drain onto an adjacent property, independent of whether the natural drainage pattern of the area itself is altered: a distinct, narrower prohibition protecting neighboring lots specifically.