Abita Nursery Drainage Study & Improvements Design

Trigon Associates, LLC served as the Prime Consultant for a comprehensive hydrologic and hydraulic (H&H) study covering approximately 130 acres, including the Abita Nursery Subdivision and its vicinity. This area, plagued by nuisance flooding due to inadequate drainage, was the focus of the study, which aimed to devise effective mitigation strategies. The drainage infrastructure within this area mainly comprised surface drainage systems, including ditches along rights-of-way and culverts under driveways and access roads. The project concluded with the submission of the final report in July 2018.

Following the initial H&H study, Trigon was engaged to engineer and design critical improvements intended to decrease both the frequency and severity of flooding. These enhancements included the construction of two new detention ponds, upgrades to existing drainage channels, the creation of additional drainage channels, and the refurbishment of existing ditches, culverts, and cross culverts. Additionally, an updated hydrologic and hydraulic model was developed, along with necessary utility relocations.

As the Prime Consultant, Trigon’s role extended beyond technical duties to encompass comprehensive project management and oversight. This included coordinating a team of consultants responsible for surveying, geotechnical studies, wetlands assessment, and environmental permitting, ensuring a cohesive approach to tackling the area’s flooding challenges.