Storm Drainage Design Guidelines (DRAFT)

Effective Date: November 2004

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• Directly to the Storm Drainage Design Guidelines (pdf format)

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Acknowledgements

The City of Oakland's Storm Drainage Design Guidelines have been prepared using the Hydrology and Hydraulics Manual published by the Alameda County Flood Control and Water Conservation District and as the primary source of information. The City also acknowledges the following organizations for guidelines regarding conceptual-solutions for developments and redevelopments to reduce and attenuate storm water runoff:

• California Stormwater BMP Handbook for New Development and Redevelopment www.cabmphandbooks.com/

• lowimpactdevelopment.com http://www.lowimpactdevelopment.com/ for natural alternative solutions

• Interlocking Concrete Pavement Institute http://www.icpi.org/

• The California Nevada Cement Promotion Council (http://www.cncpc.org/) and Concrete Network (http://concretenetwork.com/), for Pervious Concrete pavement

Purpose

The purpose of the Storm Drainage Design Guidelines for the City of Oakland is to provide an easy-to-follow manual for engineers who are familiar with the generally accepted hydrology and hydraulic design practices. This manual is prepared by the City of Oakland (City) using the Hydrology and Hydraulics Manual published by the Alameda County Flood Control and Water Conservation District (County Flood Control District) as the primary source.

This manual provides computational techniques and criteria for the design of storm water runoff and drainage facilities and procedures to determine the required storage volume for detention and retention basins. The design engineer should contact the City to determine if detention is required for a specific site. Procedures in this manual apply to the design of typical facilities. Where unusual circumstances result in requirements beyond the scope of this manual, the engineer should contact the City for additional guidance. Criteria not specifically detailed herein shall be determined in accordance with sound engineering practices with the City's approval.

The guidelines in this manual will be updated on a continual basis to reflect changes in City practices and the revision dates are shown on the bottom left corner of the pages. It is the responsibility of the user to determine that the guidelines are current.

The use of this manual in no way obviates or replaces the individual design engineer's adherence to the profession's "standard of care" in the design. Facilities designed prior to the adoption of this manual are not necessarily subject to the current criteria.

Introduction

The storm drainage system in the City of Oakland consists of more than 300 miles of storm drainpipes and 15,000 structures (mostly inlets, manholes, and catch basins). Storm drainpipes in the City are not connected, but rather scattered throughout the entire City as small networks of private or public systems. Public or City systems are the improved drainage facilities that are located within easements, right-of-ways, or within public properties such as parks. There are improved or unimproved drainage facilities in Oakland such as creeks, watercourses, and privately owned facilities that are considered part of the City's drainage network but may not necessarily be City maintained facilities. City maintained drainage facilities include improvements and structures that are constructed through the permit process and dedicated to the City for maintenance. The City is responsible for maintenance and preservation of the dedicated facilities.