City of Frisco Engineering Standards

Engineering Standards
5.4 Easements
A. In single-family residential developments, water, wastewater, and reclaimed water mains shall not
cross residential lots unless specifically approved by the Director of Engineering Services, in
which case the easement shall be located within a single lot and be a minimum of 15’ in width.
B. Water mains 24” and larger shall be located in an easement parallel and adjacent to the right-ofway.
C. All easements required by the City shall be dedicated by plat if within the platted boundary. If
outside the platted boundary, provide easement by separate instrument.
D. Site paving, such as, parking, fire lanes and access drives are allowed over utility easements with
an easement use agreement.
E. The following minimum width exclusive utility easements are required when facilities are not
located within public rights-of-way:
1. Water mains 12” and smaller are to be located within the center of a minimum 15’ utility
easement.
2. Easement widths for water mains 16” and larger shall be a minimum of 20’ subject to the
approval of the Director of Engineering Services.
3. Wastewater mains with a depth up to 10’ are to be located in the center of a 15’ utility
easement.
4. Wastewater mains with a depth between 10’ and 20’ are to be located in the center of a 20’
utility easement.
5. Wastewater mains with a depth greater than 20’ are to be located in the center of a 30’ utility
easement.
F. Fire hydrants and automatic flushing valve located outside of public rights-of-way shall be
located within a 10’ x 10’ utility easement.
G. 2” and smaller meters serving multi-family residential and non-residential developments shall be
located within the right-of-way or in a minimum 5’ x 5’ utility easement or in the right-of-way.
H. 3” and larger meters shall be located within a minimum 10’ x 10’ utility easement outside the
right-of-way.
I. All water main appurtenances such as air release valves with vents must be contained within
utility easements with a minimum 3’ clearance from the edge of the easement.
5.5 Thrust Restraint
A. All pressurized water and wastewater mains shall be restrained against thrust forces due to change
in pipeline diameter or alignment in order to prevent joint separation or movement.
B. Thrust restraint shall be accomplished by concrete thrust blocks and restrained joints.
Section 5 – Water & Wastewater Design Requirements May 2012 Page 5-17