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Town of Palm Beach Drainage Design Requirements
Drainage Design Criteria for Town of Palm Beach
Important: The information contained herein is for informational purposes only and can change without notice. This is provided for convenience and is not considered engineering advice.
Two sections of the Town Code that pertain to drainage design are Chapter 86, Planning, Article III, Stormwater Management and Chapter 30, Consistency and Concurrency Management System, Division 2, Adopted Levels of Service and Concurrency Management .
Sec. 86-95. - Threshold requirements.
The following projects involving commercial or residential development or redevelopment are considered as having met the threshold requirement:
(1) The proposed work exceeds 25 percent of the market value of the property;
(2) The proposed work includes the construction of a new swimming pool;
(3) The proposed work includes the redevelopment of more than 20 percent of landscaped open space, 20 percent of the impervious area of the site including buildings, patios, etc., or a combination thereof which exceeds 20 percent;
(4) The proposed work includes new driveways or parking areas;
(5) The proposed work includes replacement or reconstruction of parking areas other than parking areas designed for less than three residential units; or
(6) Other development as may be deemed appropriate by the town engineer.
In accordance with Section 86-95, new driveway or parking areas shall meet the Town’s Stormwater Treatment adopted level of service. Please specify the purposed of the alteration.
Property owner might want to install additional on-site stormwater collection and storage if there are any stormwater issues on the property.
Sec. 30-114. - Drainage.
(a) Adopted level of service. Drainage level of service is as specified in the town's adopted comprehensive plan.
(b) Management procedures. Drainage plans and calculations shall be submitted by applicants in conjunction with all commercial and residential development and redevelopment, which shall demonstrate, and the town engineer shall confirm that:
(1) The impact on the drainage system will not lower the level of service;
(2) The drainage problem area is scheduled and contracted for improvement in the town's capital improvement program;
(3) The developer will upgrade the drainage system to meet the level of service; or
(4) The first two inches of rainfall will be retained on site prior to discharge into the town system or post-development runoff will not exceed predevelopment runoff, whichever is greater, thereby preventing additional degradation of the system.
(5) The engineered storm water management system designed in accordance with the town's adopted level of service, as contained herein, contains sufficient provisions to retain storm water and prevent soil erosion into the roadway or adjacent properties throughout construction.
(6) Retention walls, when required, will be constructed prior to the stem wall foundation pour, or at a similar point in the construction process.
