October 15, 2012 - City of Laredo

September 20,201 2
DANNENBAUM ENGINEERING COMPANY - LAREDO, LLC
Mr. Tomas Rodriguez
Utilities Manager
City of Laredo of Utilities Department
P.O. Box 2950
Laredo, Texas 78044
LAREDO OFFICE:
8610 MCPHERSON, SUITE 130, LAREDO, TEXAS 78040 (956)712-9817
Re: El Pico Water Treatment Plant - Cify of Laredo
Subj: Additional Services for Construction Management /Inspection Contract
"Supplemental No. 1 to the Main Contract dated June L2011- Revised
As Per September 19,2012 Phone Conversation"
Dear Mr. Rodriguez,
Enclosed please find two partially executed originals of the Supplemental No. 1 (Revised 09/20/2012) to the Main
Contract dated June 1, 201 1 for additional construction management and inspection services, for the North Laredo
(El Pico) Water Treatment Plant. Also, attachment A-I; B, D and E of the main contract dated June 1, 201 I are
being modified and replaced in their entirety to account for changes in this Supplemental No. 1. Also, page 2 of 9 of
the main contract dated June 1, 2011 is being replaced in its entirety to account for modifications to Section IV
"Period of Performance."
The additional services are due to the extension of this contract from 26 months to 30 months to match the El Pico
Construction Contract and the increase in complexity and number of working locations by the El Pico Water Plant
contractor. Supplemental No. 1 to the Main Contract requests that the maximum payable lump sum fee of
$ 2,165,379.84 be modified to $2,704,327.30, an increase of $538,947.46. The total projected construction cost of
the El Pico Water Plant at bid was $89 million and after construction Change Order No. 1 was approximately $85
million. After adding Supplemental No. 1; the revised fee of $ 2,704,327.30 represents 3.18% of the construction
cost which is well within the acceptable percentage for CMI work on such a large complicated project.
Please review the attached Supplemental No. 1 to the Main Contract and if satisfactory; Dannenbaum respectfully
requests that you to execute the attached Supplemental No. 1 to the Main Contract - Revised 0912012012 and return
one original to my office for our records.
We appreciate the opportunity to provide services to the City of Laredo and look forward to a continued mutual and
beneficial relationship. If you have any questions or need clarification of the contents herein, please do not hesitate
to call me at (956) 682-3677.
Sincerely,
President ,//'
-9'
cc: Charles Celauro, P.E.
Richard D. Seitz, P.E.
M:\1540\4636-01 Laredo WTP - CMI &Cathodic Prot Svs\Ol Proj Admin\01.03 Contracts\03.3 Supplementals\Modified by Supplemental No. 1 (Revised
092012)\09202012\00~Corr- Uones to TRodriguez (09-20-12)(GR).doc