Grand Cove-CS 940727 CIVIL ENGINEERS
16250 DALLAS PARKWAY SUITE 100
DALLAS, TEXAS 75248
(214) 931-0694 FAX (214) 931-9538
July 27, 1994
Mr. Ken Griffin, P.E.
City Engineer
City of Coppell
255 Parkway Boulevard U~
Coppell, Texas 75019 ~
Re: Grand Cove Estates
Coppell, Texas
Dear Ken:
This letter is in reference to our telephone conversations
regarding Line "B", an 18" RCP Storm Drain Line in Grand Cove
Estates. We have proposed a grade change to this line in order to
save several large trees adjacent to the pipe. Your concerns as
far as these revisions were the depth of cover over the pipe, and
what our methods of erosion protection will be. The actual cover
over the 18" RCP will be as follows:
STATION COVER OVER PIPE
0 + 08 - Headwall}2.12% 3't Previously Approved
0 + 30 )Pipe Grade 3'
0 + 50 P.V.I.} 5'
0 + 72}12.68% 4'
1 + 00 }Pipe Grade 4.5'
1 + 30 P.V.I.} 4'
The method of erosion control propoaed is woven mesh fabric to be
staked in place over disturbed trench line with hydro-mulch seeding
to be watered until a stand of grass exists. We feel this will
meet with your approval.
If you have any questions or comments regarding this matter please
call me.
Very truly your~
WAA;jrb