DR9001-CS 890605 GINN, INC.
June 5, 1989
Mr. Scott Balch, P.E.
L.H. Lacy.'~o.
P.O. B~ 541297
D~, TX 75354-1297
Re:
CONSULTING S
Denton Tap Road Improvements from Sandy Lake Road to
Denton Creek - Outside Lane Flooding Southbound Lanes
from Sta. 176+50 to Sta. 177+80
Dear Mr. Balch:
During yesterday morning's thunderstorms I observed flooding in
the southbound lanes between the inlet at Station 176+50 and the
one at 177+80. The runoff which was entering the street was from
the "overflow channel" which was constructed immediately north of
the inlet at Station 176+50 as a part of your efforts on May 17,
1989. The rear openings in the inlet at Station 176+50 worked
very well and will handle the additional flow if the "overflow
channel" is closed. Please have the "overflow channel" filled as
soon as possible in order to prevent excessive pending of water
on the roadway in this area in future thunderstorms and rainfall
events.
While observing the above, I also noticed what appears to be an
indication of deviation from the profile grades shown on the
Drawings in this area. Some stormwater runoff flows south into
the inlet at Station 176+50 instead of going north as it should
in accordance with the plans. Also, the pending width indicates
that the pavement crossfall from the median to the outside
curbline may be too flat. Please have your surveyor check your
profile and crossfall grades in this area and submit your
findings in writing to us for review.
Please refer to the attached marked blueline print of Sheet 13 of
56.
We appreciate your cooperation in this matter.
Sincerely,
John C. Karlsruher, P.E.
Project Engineer
enclosure
cc: Russell Doyle, Y3~eming
H. Wayne Ginn,
_
17103 Proton Road ® Suite 10~t~ LB 118 · Dal~, Tex~ 75248 Phone 214/248~9~