top of page

Drainage Master Plan


On Tuesday, October 17, 2017 Central City Council unanimously voted for technical assistance in preparation of a Master Drainage Plan and assessment (identification) of hazard mitigation funding for post-disaster recovery efforts. This decision is one of several critical steps within Mayor Shelton’s initiative to address our existing drainage system. Like many Central residents impacted by the flood, the mayor would like to see progress immediately. Work on the drainage plan has already begun and will serve as a cost-effective course of action to identify our needs.

The great flood of August 2016 was a devastating wake-up call as to how quickly flood waters can disrupt entire communities within a relatively short period of time.  The objective of the study is to establish the basis for storm-water management by identifying drainage projects and developing standards that meet current federal, state, and local regulations. Drainage projects will be prioritized in alignment with policies and procedures which will be detailed in the master plan. The highest priority will be given to projects which provide the greatest protection against the threat to life and property. From this prioritized list, projects will be selected based on available funding for completion in phases from pre-design to construction. The result will be the development of a plan which will divert flood waters away from homes and businesses and out of the travel lanes of our major corridors.


Citizens should anticipate a series of public outreach activities over the course of the nine-month study. Beginning with launch of a website page specific to Central City drainage, residents will have the opportunity to view project study updates, flood inundation and drainage maps, and receive announcements of when outreach meetings will occur. During community workshops, attendees will be informed of current drainage assessments conducted throughout the area and provide input on suggested projects for drainage remediation. For those unable to attend outreach activities, a link to the drainage webpage will include a comment area and encourage visitors to the site to provide feedback on where drainage problems develop more frequently.


Upon completion, the Master Drainage Plan will propose storm-water management strategies implemented in phases as the budget allows, within critical areas of Central City. The plan will establish a schedule for routine maintenance of drainage structures and facilities, allowing for timely response to specific problems within the system. In addition, a recommendation for best practices will provide insight for addressing storm-water servicing within future development areas of the City. The intent of these efforts will produce long-term sustainability of storm related events that are most likely to occur during hurricane season. Most importantly, the drainage plan will aid Central City communities to withstand storm impact and improve flood protection which ultimately enhances resilience to potentially wide-spread damage. 


Tentative Schedule:

  • Start – November 2017

  • Public Outreach Event – March/April 2018

  • Draft Findings – March 2019

  • Final Document – May 2019


Task Summary:


Gather and collect data (existing data, survey data, past events, etc.)


Model current conditions to identify problem areas within major drainage features


Develop project ideas to address problem areas identified during modeling


Prepare a capital improvement plan with a prioritized list of projects and funding strategies


Develop an inspection and maintenance program


Provide the City with recommendations to improve its FEMA Community Rating which could result in lower flood insurance premiums for citizens


Create recommended resiliency strategies for the City to consider as a tool to minimize future risks

Powerpoint Presentation from 4/9/19:   Master Drainage Plan Draft   Click HERE.


City of Central Master Drainage Plan (7/2/2019) :





The “Drainage 101” station is intended to share general knowledge related to the City’s drainage system starting with its location within the Amite River Drainage Basin (1,884 square miles) and then proceeding to a detailed illustration of the eight sub-basins within the City limits.  Another graphic is included to provide an understanding of the magnitude and probability of 2, 5, 10, 25, 50 and 100-year rain events and how they are accounted for with typical engineering design standards for ditches, channels, roadways and structures.  Finally, a sampling of drone footage for select drainage features is provided as well as an educational brochure with responsibilities, drainage tips and key contact numbers.


The “NFIP & CRS” station provides facts and figures associated with two key flood insurance related programs – the National Flood Insurance Program and the Community Rating System.  The source of the information presented on the informational poster is  In addition, various FEMA informational handouts/brochures related to flood insurance and these programs were provided.  The same information is available at the previously referenced FEMA website.


The “Impacts of the Flood of 2016” station includes a variety of images and one video that illustrate the areas of inundation throughout the City during the August 2016 flood event.  Data sources for the information provided include the Amite River Basin Commission, USGS, FEMA, LADOTD and CSRS.


The “Drainage Improvement Efforts to Date” station includes video, a map and stats associated with both roadside and off-road drainage work performed by the City since August 2016.  


The “Scope, Schedule & Modeling” station includes a variety of images that illustrate the scope of work being undertaken with the Master Drainage Plan.  The images capture the City’s entire drainage network as well as provide a sampling of model output associated with one of the City’s six primary drainage features.  This station is intended to give the citizens a glimpse of the technical aspects and output of the Master Drainage Plan. 


A public comment form is provided at Station # 6 for citizens to record their specific drainage concern.

bottom of page