ST9801-CS000509 (2)Sent By: EBCC; .~, 2143523201; May-9-~ 8:08AM; Page 2/3
FAX {214} ~3J2-3201 TELEPHONE (:~14)
ED BELL CONSTRUCTION COMPANY
POST OFFICE BOX ~14.0787 10~05 HARRY HINES
DALLAS, TEXAS 75354-0787 DALLAS, TEXAS 76220
May 9. 2000
Mr. Kent Collin~, P.E.
Engineering and Public Works '~
City of Coppei!
255 Parkway Blvd.
Coppell, Texas 75019-4409
Re: Coppell Road Reconstruction
SH 121 to Sandy Lake Road
Coppell Projcet #: ST 98-01
Dear Mr. Collins:
Enclosed tbr your records is a drawing of the paving cross section (half) for the referenced rn'oject
comparing the parabolic crown identified in the plans and start 'dard details with the modified parabolic
crown proposed by EBCC. The differences between the two crowns is minimal and will not affect the
visual appearance or the driving characteristics of the roadway.
As discussed m our earlier phone coiwersation, the cur¥c bra/rue parabolic crown cann6t be achieved
utilizing the straight pan sections on a slip form paving machine and that straight cord sections need to
be utilized to simulate the parabolic crown. Based upon o,ur previous phone convc-rsation; it is our intent
to modi fy the crown in the following manner:
I. Establish a straight cross slope from the centerlin¢ to the ten foot point on the slab. The drop
in the crown at the ten foot point will be 1.5 inches. This point closely approximates the 'A point on the
parabolic crown standard detail.
2. Establish a straight cross slope from the ten lbot point to the gutter line at the base of the
curb.
If you have any questions regarding this information, don't hesitate to contact oar office.
Sincerely,
o~~l~on~,t~ction Company
Project Engineer
x¢: 1Vir. Kcvin C. Young, 15.t.1'., Freese and Nichols, Inc., 1701 N. Market, Suite 500, LB 51
Dallas. Texas 75201
AN EQUAL OPPOI~TUNII'Y EMPLOYEF~