SS9901-CS040326COl'FELL
March 26, 2004
Mr. Charlie Stringer
Water Facilities Project Management
City of Dallas
2121 Main Street, Suite 500
Dallas, Texas 75201
DeForest Lift Station Improvements
SS 99-01
Force Main Line "B'
Dear Mr. Stringer:
This is a follow-up to my letter dated February. 18, 2003 conceming the proposed construction of
a 30-inch force main that will cross under an existing City of Dallas 54-inch water line located in
a Dallas owned 20-foot water line easement. Re plan sheets that were enclosed showed the open
cut/boring installation of the force main through thc casement.
I received a letter from Mr. Randy Nelson, Program Manager of Engineering Services, on March
24, 2003 stating that the 2-foot separation distance did not meet the TCEQ requirements. The
consultant for the project said the force main was designed in accordance with the TCEQ
Proposed Chapter 217, Subchapter C: Conventional Collection Systems, §217.53 Pipe Design,
(d), (2). ~he proposed pipe is ductile iron with a pressure rating of 150 psi, is encased, and has
the 2-foot minimum separation distance.
In June 2003, the City authorized the consultant to add an alternatc construction method for thc
installation of thc force main: directional drilling Thc City awarded a construction contract for
the open cut/boring installation of thc force main on March 23, 2004. A pre-construction
conference will be scheduled in thc near future.
Should you or Mr. Nelson have anymore concerns about the 2-foot separation distance, please
feel free to contact Mr. Ted Sugg with Turner, Collie & Braden at 972-735-3048 Your
consideration of this matter is appreciated and should you have any qucstions or need any
additional information, please contact me at 972-304-7019.
Enclosures