WA9701-CN040909BIRKHOFF, HENDRICKS & CONWAY, L.L.P.
CONSULTING ENGINEERS
7502 Greenville Ave., #220
JOHN W. BIRKHOFF, P.E.
RONALD V. CONWAY. P.E.
GARY C. I-JENDRICKS. P,E.
JOE R. CARTER, P,E.
PAUL A. CAP-LINE, P.E.
MATT HICKEY,
DOUGLAS K. SHOWERS. P.E.
Dallas, Texas 75231
Fax (214) 361-0204
September 9, 2004
Phone (214) 361-7900
Mr. Kenneth Griffin, P.E.
City Engineer/Director of Public Works
City of Coppell
P. O. Box 478
Coppell, Texas 75019
Re:
Denton Tap Road 16" Water Line (Airline Drive to Bethel Road)
Revised Scope of Work
Engineering Services Agreement - Amendment No. 1
Dear Mr. Griffin:
Pursuant to your meeting in late October 2003 with Mr. Gary Hendricks of our firm, we have reviewed the
impact of the alignment revision as it relates to the opinion of probable construction cost and to the
engineering design effort required to complete the necessary revisions to the design plans.
The change in scope items are listed below:
Installation of water line in median and with removal of existing lines where installation is adjacent to
curb line north of Airline,
Installation of additional fire hydrants and connections to new and existing fire hydrants under
existing pavement,
Installation of service connections to existing business customers along the alignment,
Additional traffic control, and
Possible replacement of storm drainage appurtenances along the median alignment segment.
We have estimated revised quantities to establish a new probable opinion of construction cost. Selecting the
least cost median alternative, it appears that the project construction cost will increase by approximately
$130,000 from our original estimate of $430,000 to $560,000 (see attached).
In regards to the Engineering Fees to re-design the project to 90% complete as it stands today, we offer the
following breakdown:
Design ......................................................... additional $14,000 lump sum
Construction ................................................ no change
Contract Administration ............................. no change
Field Survey ................................................ no change
Other ........................................................... no change
Mr. Kenneth Griffin, P.E.
City of Coppell
September 9, 2004
Page 2 of 2
Although we believe the plans are currently at 90% completion, we will be able to bring the design back to
that point for less than 45% of the original design phase fee. There are enough survey dollars in the current
agreement to complete the additional survey work required to detail the median and east side of the roadway
where necessary. Otherwise there are no design related affects on the contract.
We request this contract amendment to cover the additional engineering services to Re-Design the 16-Inch
Waterline along the revised alignment. If you are in agreement with this contract amendment, please have
one copy executed on behalf of the City of Coppell and retumed to our office.
Sincerely yours/~7'/
,-~Douglas .I~howers, P.E.
Enclosure
APPROVED FOR THE CITY OF COPPELL
Datey/~' b p~