Tangipahoa Parish, LA Environmental Rules: Stormwater Management (2026)

Section 36-111, 'General improvement standards,' devotes subsection (f) to drainage requirements that apply across the unincorporated parish's subdivisions and developments. Paragraph (1) makes the developer responsible for planning all project drainage in accordance with the appropriate parish drainage authority's requirements, and for meeting the flood prevention and protection standards in Article IX of the same chapter. S. 38:215's bar on impeding the natural flow of drainage. Paragraph (6) requires adequate provision for stormwater disposal subject to drainage authority approval, and it locates necessary storm drainage within the street right-of-way except where a servitude serves outfall or interconnection needs.

Paragraph (7) bars any construction, fill or fences in a drainageway, designated drainage servitude or the parish right-of-way without the appropriate parish authority's approval, and it flatly prohibits placing fences, sheds or other appurtenances in a designated drainage servitude, making the property owner responsible for relocating anything that does end up there. Paragraph (4) additionally bars deepening, widening, filling or rerouting an existing ditch or drainage canal without written permission from the parish drainage authority. A broader Section 36-111(h) subsection, addressing 'stormwater management and water quality,' layers on federal Clean Water Act and Louisiana DEQ discharge-permit requirements for larger developments, including a required stormwater pollution prevention plan for construction disturbing an acre or more.