City of Frisco Engineering Standards

Engineering Standards
3. Tunneling
5.8 Crossings
A. Highway Crossings
1. The design of water and wastewater mains within a state highway must be in compliance with
all applicable requirements of the Texas Department of Transportation (TXDOT), unless a
variance is approved by TXDOT. The following reference applies: Title 43 of the Texas
Administrative Code, Part 1, Chapter 21, Subchapter C – Utilities Accommodation
2. Water and wastewater mains shall be located so as to avoid or minimize the impact to future
highway projects and improvements, to allow other utilities in the right-of-way, and to permit
access to water and wastewater mains and other utility facilities for their maintenance with
minimum interference to highway traffic
3. New water and wastewater mains crossing a highway shall be installed at approximately 90°
to the centerline of the highway,
4. New water and wastewater mains located longitudinally along a highway shall be designed
parallel to the right-of-way.
5. All water and wastewater crossings shall be encased with steel casing pipe in accordance with
Section 5.7C(1) Horizontal Boring, or approved equal. Casing pipe shall be extended to the
right-of-way line
6. Water valves, manholes and other appurtenances shall not be placed in the pavement or
shoulder of highway.
7. Water main crossings shall include a valve on each side of the highway crossing.
8. Individual service meters shall be placed outside the limits of the right-of-way.
B. Railroad Crossings
1. The design of water and wastewater mains within railroad right-of-way must be in
compliance with the requirements of the appropriate railroad authority. The designer should
determine which railroad company right-of-way is being crossed and obtain their utility
accommodation policies prior to beginning the design. The following references may be
applicable:
a. Utility Accommodation Policy by Burlington Northern Santa Fe (BNSF), Latest Edition.
b. American Railway Engineering & Maintenance Association (AREMA), Latest Edition.
2. New water and wastewater mains crossing a railroad shall be installed at approximately 90°
to the centerline of the railroad.
3. New water and wastewater mains located longitudinally along a railroad shall be designed
parallel to the right-of-way. No main shall be located closer than 25’ from the centerline of
the track.
Section 5 – Water & Wastewater Design Requirements May 2012 Page 5-19