ST8402-CS 881222 (3) GINN, INC : CONSULTING I;N(.INEERS
December 2~8
Dallas W~r_utilities
Engineer~hg Department
320 E. ~efferson, Rm. 211
DallaT~exas 75203
Atte~tio~Mr.' M~ m W ~'-'=~ , Me~ -~__~_Water & Sewer Design
Re:I/Denton Tap Road Improvements from Sandy Lake ..... Roa~ to D~nton~
~ Creek, Coppell, Texas.
Dear Mr. Stewart: /
We are transmitting herewith a marked blue line copy of Sheet 22
of 56 of the Drawings for the subject project showing a conflict
between the proposed storm sewer and Dallas Water Utilities' 30"
Flower Mound Treated Water Line . During previous correspondence
with Mr. A. V. Almeida of Dallas Water Utilities, copies
attached, we had requested and received review comments of our
preliminary plans in order to avoid occurrences such as this.
Based on the comments received by this office we proceeded with
final design and construction began on June 15, 1988.
On December 5, 1988 we received notification of a conflict
between storm sewer lateral D-22 and the 30" water line from L.
H. Lacy Company, the City of Coppell's Contractor for the
project. A copy of their letter and attached field data is
attached.
Ginn, Inc., as the Project Engineer, has done some investigation
of alternate paving and storm sewer construction to alleviate the
situation. We have not found a practical solution other than
lowering the 30" water line. The alternate solutions
investigated to date would not allow sufficient cover between the
water line and proposed paving and storm sewer to provide
adequate protection to the water line.
In light of the fact that the Denton Tap Road Improvements
project is currently under construction, we hereby request that
you review the information included herewith and contact us as
soon as possible in order to set up a meeting between Dallas
Water Utilities, the city of Coppell and Ginn, Inc. to discuss
the situation. Please call me if you have any questions.
sincerely, /
John ~. Karlsruher, P. E.
enclosures
cc: ~~.Y, Engineer
Project Engineer
17103 Prcstlm Road ® St, itc 100 · LB liS · l)allas, Tcxas75248 · Phlmc214/248-4900
August 26, 1987
John C. Karlsruher, P.E.
Otnn, Inc.
17103 Preston Road
Suite 100 - LBl18
Dallas, Texas 7~248
Re:
Oenton Tap Road
Pavtng and Ora(nage Improvements
Coppe11, Texas
Dear Mr. Karlsruher:
Per D.W.U.'s review of the subject plans and as indicated in your letter dated
August 7, 1987, there are se~ areas of conflict between proposed drainage
improvements and t#e extsttng 30" water main. It is m~ understanding that
lateral 0-8 wtll be redesigned and lateral 0-7 will be deleted to eliminate
conflicts with the 30' R.C. water main in Denton Tap Road. Also, ! reiterate
that the piers for the proposed bridge at Cottonwood Branch Creek are to cle~J~--~
the outside diameter of the existing 30" R.C. water main by a eintmUm of 3~
n~the area of the shallow water at Station 185+00, please advtse the
contractor to work with caution to avoid damage to the 30" R.C. water m~in.
There is an existing 3" air valve on the 30" R.C. water main at paving station
206+00+ which may require adjustment by D.W.U. City Forces. Please contact
Mr. MtlEe Parsley, ~nager of City Forces, at 670-8692 at least 40 hours prior
to working in this area.
Should you have any questions or require additional information, please
contact Rick Zohne or Jt~m~y Rogers at 940-4590.
A. V. Almetda, Manager
Water & Sewer Oestgn Division
eh
c: Mike Parsley
File
FILE COPY
GINN, INC.
CONSULTING ENGINEERS
Auc~l. at 7, 1987
&. V. &l~eid&, P.E.
Dallas Water Utilities
320 E. JeEfer~onBlvd., 1~.
l)~lles, 'X~ 75203
211
Re:
~enton Tap Ro~d
Paving and Drainage X~prove~ents
Coppell, Texas
Dear
In preparing engineering plans Eot the above mentioned project we
have encountered~ potential conflicts between your existing
30-inch water tranlmiasion line to Flower Mound, and our proposed
paving and drainage il~rovelaents, we have enclosed two sets of
preliminary plans for the proposed paving and drainage
improve~enta for your use in determining which of your existing
facilities mast be either relocated, lowered, or protected in
other ways ahead of the proposed construction of Denton Tap Road
north of Sandy Lake Road.
In your review of our plans you will see that we will have a
conflict at ator~se~er lateral number D-7 and also at the bridge
widening location at Cottonwood Branch. We have also exposed the
pipe in the proximity of paving station 185+00 where it appears
that the cover provided by our future paving may be inadequate
for your transmission line.
I would like to meet with you at your earliest convenience to
discuss a plan of action in determining how and when the Proper
relocations and lc~eringa can be collated in advance of our
construction. We anticipate advertising this project for bid in
September and ~eginning construction in late November. We a~e
currently designil~g t~e. propOsed construction sequence ana,
therefore, are in a position to try to accommodate the water line
relocation/lowerings in the most reasonable manner.
17103 Preston Ro~d ® Suite 100 · LB 118 · Dallas. Tex,,,s 7~248 · ~ 214/248-4900
Mr. A. V. Almeida, P.E.
August 7, 1987
Page 2
We appreciate y~ur cooperation with
matter.
Sincerely,
John C, Karlsruher, P.E.
cc: Alan D. Ratli£f, City ~
H. Wayne Ginn, P.E., City Engr.
the City of Coppe11
in this
December 5, 1988
Ginn, Inc., Consulting Engineers
17103 Preston Road
Suite 100, LB-118
Dallas, Texas 75248
Attn: John C. Karlsruher, P.E.
Project:
Denton Ta~ Road Improvements From Sandy Lake
To Denton Creek
Project 379
RE
: City of Dallas 30" Water Line
Dear John:
While attempting to install lateral D-22 on Monday, November
28, 1988, our subcontractor, American Developers, uncovered
the 30' City of Dallas Water Line. It's at offset 167+32
and on the plans shows to be approximately at 44' right
of centerline, we have a field shot that shows it to be
at 42.7' right of centerline. The horizontal location is
not a problem; however, the vertical location of the 30"
water line on the plans shows to be at an elevation of 488.5
at 44' right of centerline. The actual field ties show
the 30" water line to be at an elevation of 492.21 at 42.7'
right of centerline. This interferes directly with the
lateral pipe and there would only be three or four tenths
clearance below the bottom of paving at this station.
With the existing drainage structures and existing
intersection at Sandy Lake, there may be no recourse other
than that the City of Dallas lower their 30" water line.
Per our most recent schedule, we show Phase II excavation
to start in the third week of January, 1989 and we show
Phase II subgrade, preparation to start in the second week
of February, 1989. We have some time to solve the problem,
but that window will close rapidly. It is L. H. Lacy's
intention to pave Phase II on the North Project before we
pave Phase II on the South Project. As we have stated before,
it is our intention to finish the North Project as soon
as possible. This will allow us to concentrate our efforts
on the completion of the South Project.
L. H. Lacy Company
General Contractors
214/357-0146
'Qualily Construction Io~ over 65 Years"
10888 Shady Trail
P.O. Box 541297
Dallas, Texas 75354-1297
TAP OOA~ :~PNOVEflENTS P~OJEC1 - SANDY LAKE 10 OENION CREEK
30-N~v-88
~tAI~ON OFFSET OFFS[!
(ACTUAL) [i'L~S) (ACTUAL) (PROJECTE~ (AS 5iIUWN DIFFERENCE
FOO~ ~CIUAL) ON PLANS) ~AC)UAL~PLANS)
i?z + 05 40.00 4§5.80 45~.00 I.BO
]87 + 57 40.UO 451.58 ~SO.O0 4 (0.42)
18& ~ ~ ~9.00 40.00 457.~9 457.99
:~ + 54 aO.O0 45%30 ~59.70 4 10,40)
182 ~ 31 40.00 ~O.ub 459.85 q59.85
l~l ~ 02 40.00 462.11 qbl.~O
!79 + ~6 4O.Ou 465.56 466.00
178 + 34 38,S0 40.00 466.82 466.82 464.§D i 2,32
lyf { 77 4u.00 470.44 467.50
17! + )0 40.90 476.{3 474.50 1,63
16't 32 42.70 44.00 472.2! 492.21 488.50
166 t 58
LA1 ~-4
LAT 0-4
LR1 0-8
LAI I)-1.2
LAY O-J6
LAI D-22
KNOWN ELEVRT!ON AS SHOWN ON PLANS
NIIH lflE §EN£R~iEO INFO~AI]ON t. AIEfiALO b-4. ~-14, & 0-16 CDULO X~¥£ JKILSFESRENCE.
LAIEN~: ~-2~ ~EFINAIEL¥ ll~ AN INTLI(FE88EN~ PROBLEm.
I;)E ~dnlN~L CL£AOaNCE IN THE D-22 LaIER~L R~ER IS ~EFI~RIEL¥ A POOBL£R.
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