City of Frisco Engineering Standards

Engineering Standards
submittal as well as the required FEMA submittal and shipping fees. Upon City approval,
receipt of the fees, and receipt of the FEMA review copy, the City will forward the submittal
to FEMA.
5. All response to FEMA comments shall be submitted to the City prior to submittal to FEMA.
The City will review the response to comments in a timely manner.
4.16 Erosion and Sedimentation Control
A. See Section 8 for requirements for Stormwater Best Management Practices and Stormwater
Management Plan.
4.17 Drainage Easements
A. The following minimum width exclusive drainage easements are required when facilities are not
located within public rights-of-way or easements:
1. Storm sewers are to be located within the center of a 15’ drainage easement or 1.5 times the
depth plus the width of the structure rounded up to the nearest 5’, whichever is greater.
2. Overflow flumes are to be located with the edge being a minimum of 1’ off the property line
within a 10’ drainage easement.
B. Storm drain lines are considered public if they cross property lines and collect runoff from
adjacent properties. Drainage easements shall be dedicated to the City when a drainage system
crosses a property line. For single-family residential developments, storm drain lines shall not
cross residential lots unless approved by the Director of Engineering Services.
C. Drainage Easements shall be dedicated for all floodplains and shall include an erosion hazard
setback to reduce the potential for damage due to erosion of the bank.
D. Drainage Easements shall be dedicated for all detention facilities.
4.18 Sustainable Development
The City encourages developments to implement sustainable designs, concepts, and practices on
site. The Engineer shall notify the City of the design intent and provide the necessary
information, data, and calculations on the construction plans. The following items are potential
concepts and designs that may be considered in a sustainable design. Concepts and designs not
included on this list may be proposed by the Engineer.
• Rainwater Harvesting
• Green Roofs
• Modular Porous Paver Systems
• Porous Concrete
• Extended Detention
• Bio Retention
Section 4 – Drainage Design Requirements May 2012 Page 4-38