WA0002-CS041028~DALLASCOUNTY
PUBLIC WORKS
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FROM: _ --
ABEL V,'SA'LDAI~A, P,E., PROJECT M~
411 ELM STREET, 4TM FLOOR
DALLAS, TEXAS 75202
TELE. NO.: 214-653-6240
FAX NO.: 214-653-6445
EMA1L: ASaldana~dallas¢ounty.or$
October 28, 200~
Jay Louy, Principal
North Texas Contracting, Lac,
P.O. Box 468
Keller, TX 76244
Attention: Veto Fran~in, PrOject Manager
Re: CDBG FY 2002 Coppell Fire Hydrants & Water Mains Project
Golden Triangle Mobile Home Park
Construction Contract - Reduced Flowable Backfill Costs
Dea~ IVlr, Louy,
We appreciate your reply dated October 12, 2004 by Veto Franklin, Project Manager, (attached)
providing the Flowable Backfill Raw Material Cost of $46,00/c.y, for thc referenced project. As
previously noted, thc following is a summary of the concrete strength reports for Water Line
Sta, ~ Break
5+80 August 2, 2004 IS-Day
2+50 August 3, 2004 14-Day
2+00 August 4, 2004 7-Day
1+08 August 4, 2004 i3-Day
274 psi August 30, 2004 279 psi
245 psi August 31, 2004 270 psi
lO0 psi September 1, 2004 lg5 psi
942 psi September 1, 2004 1,139 psi
Note that three (3) out of four (4) locations, or 75%, of the flowable backfill failed meeting the requi:~l
minimum 28-day compressive strength of 500 psi. Also, the compressive strength average is 245 psi, or
about S0% of the minimum. Accordingly, Dallas County Public Works has adjusted the Total Unit
Price for Bid Item No. I-7, Flowable Backfill as follows:
Total Unit Price - Raw Material Cost + Adjusted Raw Material Cost -
$80,00/c,
Y. $46.001c.y. $28.75'/c.y, ~ Price
* 75% x 50% x $46.00/c.y, + 25% x 100% x $46.00 c.y. = $28.7~
Please review this reduced flowable backfill cost at your earliest convenience and respond in writing aa
to your approval of same. We look forward to a proper resolution of this outstanding item for the
CDIiC; FY 2002 Coppell Fire Hydrants & Water Mains project and its successful completion.
Sincerely,
Abel V, Saldafla, P.~
Project Manager
411 Elm Street, 4u~ Floor Dallas, Texas 75202
214-653-7151 Fax 214-653.64~5
Mr. Louy
October 28, 2004
Page Two
At~chm~n~
Donald R. l, iolzwarth. P.E., Director, Dali,., CDuniy Public Work~
Aiber~ BZ~ir Robinson. P.E., A~illanl Director. D~llu Cou~ ~b~c Wor~, Engineering & Cons~c~on Div,
~ck L~ss~rB, D~mr, D~IIa~ Coun~ Planning & ~velopment
~ ~nl~z, ~or Cons~tion ]ns~tor, DalI~ Coun~ ~blic Wor~
~n~ G~n, P.E., D~ec~r, ~n~inea~n~ ~d ~bllc Wot~, City of Cop~ll
Da~ ~je~, Senior V.P., O~rntions Se~ices ~ SWAT D~r, ~o~ble Residen~ Co.unities
~xl file: Col~e~eHs&W..~rMtl~'~qoT~Conencfl~g Reducedl=low~bBa~k/~C01t [02B2004
214 65~ 6445
October 12, 2004
Dali,- County Public Works
411 Elm $~'eet, 4~h Floor
Daila~, TX 75202
P.04
TEXAS CONTRACTING, INC.
NORTH
Attention: Abel Saldana, P.E.
Reference: CDBG FY 2002 Coppcll Fire Hydrants & Water Mains Project
Dear Mr. Saldana:
Wc have received your request for the price of thc Flowable till installed on this project.
Our price to Nelson Bros. Ready Mix is $46.00 per cubic yard.
In addition, our records show that 238 cubic yards of Flowabla fill was installed on the
project. The delivery tickets we have received with the invoices, indicate this amount.
Nelson Bros, is providing u~ with the missing batch tickets to verify that this was the
amount of FIowable fill delivered to &c project rather than the 193 cubic yards shown on
the batch tickets we now have in our files,
Please let us know if you need any further information so we can get this matter settled,
Sincerely,
North Texas ConLracti~g,
Veto Franklin
Project Manager
4909 Keller Hasler Roi, Keller, TX 76248 · RO, Box 468 Keller, TX 78244 · (817) 430-9500 · Fax (817) 430-0207