Engineering Department - Environmental and Stormwater Management

Storm Drainage Design Criteria

(Many of the documents in this area are Adobe® PDF files.)

Introduction

This manual is a guide to assist Engineers in the design of stormwater systems in the City of Clearwater. In general these standards are a combination of requirements set by the Southwest Florida Water Management District, and requirements set by the City of Clearwater, Public Works Administration. This manual does not propose to itemize the requirements of the Southwest Florida Water Management District, but to highlight and detail the requirements of the City of Clearwater. Where design standards of applicable regulatory agency's vary, the more restrictive or higher standard will apply. The Designer is required to be familiar with the current design requirements of the Southwest Florida Water Management District. The appropriate Southwest Florida Water Management District storm water permit and other applicable regulatory agency permits will be required prior to any final construction permit approval by the City of Clearwater.

The Designers attention is called to the City of Clearwater requirement that all development and redevelopment will require provisions for storm water management. In particular, redevelopment will be required to provide storm water management facilities in accordance with the regulations herein.

For the purpose of administering these stormwater management regulations, redevelopment is defined as the alteration of buildings, parking, or other landform features of a property, which necessitates the Community Development Code review process. Redevelopment of property for which no stormwater management facilities exists will be required to provide such facilities in accordance with the methodology contained herein, notwithstanding that the circumstances of the redevelopment may not result in an increase of stormwater runoff.

Design Criteria & Attachments listed below are available in Adobe® PDF format

• City of Clearwater Storm Drainage Design Criteria
• State of Florida Department of Transportation Drainage Manual, Apendix B - IDF Curves (August 2001):
  • Duration Frequency Curves for Zone 6
• State of Florida Department of Transportation Hydrology Handbook (January 2004):
  • Overland Flow Velocities for Various Land Use Types
• City of Clearwater Construction Standard Details:
  • Index #214 - Storm Sewer Outfall Control Structure w/Orifice
  • Index #215 - Storm Sewer Outfall Control Structure w/Underdrain
  • Index #216 - Storm Sewer Outfall Control Structure w/Slot or V-Notch
  • Index #217 - Underdrain Detail for Dry Detention Areas
  • Index #219 - Underdrain Detail - Non-Roadway
  • Index #231 - Wet Detention / Retention Pond