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File #: 18-011    Name:
Type: Report Status: Individual Item Ready
File created: 1/8/2018 In control: City Council
On agenda: 1/22/2018 Final action:
Title: Discuss and consider approval of proposed amendments to the City of New Braunfels Drainage and Erosion Control Design Manual regarding channel and channel access requirements.
Attachments: 1. NB_DCM_Final_2016_U2018-1_Proposed
Presenter/Contact
Presenter
Garry Ford, P.E., City Engineer
Contact Info
(830) 221-4020 - gford@nbtexas.org

Subject Header
SUBJECT:
Title
Discuss and consider approval of proposed amendments to the City of New Braunfels Drainage and Erosion Control Design Manual regarding channel and channel access requirements.

Body
BACKGROUND / RATIONALE:
In accordance with the Code of Ordinances, the city engineer is hereby authorized and directed to promulgate city standards for the design, construction, installation, location and arrangement of drainage facilities. The city engineer shall submit such standards to the planning commission for recommendation to city council and, thereafter, file such standards with the city secretary at least ten days before they become effective. The city engineer may amend the standards from time to time, upon the recommendation of the planning commission to city council, and such amendment shall be filed with the city secretary at least ten days before it becomes effective.

The Drainage and Erosion Control Design Manual (DCM) is intended to establish uniform design practices for the design and construction of storm drainage and erosion control in New Braunfels and its extraterritorial jurisdiction. The DCM is specified in Section 143-2(b) of the City of New Braunfels Code of Ordinances as part of the official stormwater management plan. The manual neither replaces the need for engineering judgment nor precludes the use of information not presented in the manual.

The following amendments are proposed to the DCM to address frequent review comments, maintenance issues and clarify design criteria to improve the development process:

Section 2.3 - Clarify and revise channel definition, design frequency and freeboard requirements.
Freeboard requirements are specified in Section 2.3. Freeboard is the factor of safety above a design flood level to compensate for many unknown factors that could contribute to stormwater heights greater that...

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