Treasure Island approves terrain modification program

The Treasure Island City Commission has unanimously approved the Terrain Modification Program, a comprehensive initiative aimed at mitigating the impacts of sea level rise. The program, effective May 1, allows property owners to voluntarily elevate their land using fill material, marking a significant shift from the city’s previous no-fill policy.

The program aims to address instances of “sunny day flooding,” wherein high tides cause water to back up into stormwater systems, flooding roadways even in the absence of rain. 

City officials say that the program is a long-term strategy to enhance resilience against sea level rise. By enabling gradual elevation of properties, the city seeks to maintain functionality of roadways and reduce flooding risks. The program’s success relies on widespread participation, as public infrastructure upgrades will depend on the elevation of adjacent private properties. 

The program is guided by the Terrain Modification Manual, which provides detailed criteria for design and construction to prevent negative impacts on adjacent properties. The manual outlines procedures for various development types, including single-family, commercial and public infrastructure projects. To implement the program, the city revised several ordinances, including updates to floodplain management and zoning regulations. 

The Terrain Modification Program permits the use of structural or non-structural fill to raise the ground beneath and around structures. Key provisions include:

• No requirement for new seawalls, retaining walls or docks when raising a property.
• Voluntary participation with no mandate to elevate structures for the first 10 years of the program.
• Allowance for owners to choose their elevation height to balance cost and protection.
• Requirement for a signed and sealed drainage plan to protect adjacent properties.
• Biennial evaluation of the program by the Local Planning Agency.

While the program received unanimous approval, Commissioner Chris Clark, who was absent during the vote, expressed concerns about its complexity and potential costs to businesses. He advocated for a more streamlined approach to permitting and business development. 

Residents are encouraged to stay informed through the city’s official communication channels and to participate in upcoming public meetings related to the program. For more information and updates, visit the City of Treasure Island’s official website at www.mytreasureisland.org.