ST9401-CN 981110CITY COUNCIL MEETING:
AGENDA REQUEST FORM
November 10. 1998
ITEM
ITEM CAPTION:
Consider approval of Change Order #1 for Denton Tap Road Project #ST 94-01 in the amount of $120,351.00 to Rebcon
Inc. for the revised bridge railing over Denton Creek; and authorizing the Mayor to sign.
SUBMITTED BY: Ken Griffin, P.E.
TITLE: Director of Engineering/Public Works
STAFF RECOMMENDS: APPROVAL
STAFF COMMENTS:
ApPROVED
BY
CiTY COUNCIL
DATE -/7/n;,/f g
See attached memo.
BUDGET AMT. $ AMT. EST. $
FINANCIAL COMMENTS:
Funds £or th,s Change Order have been
designated in the
DIR. INITIALS: ~7 FIN. REVIEW:(~
Agcnda Request Form - Revised 3/98
II, I' I
+/- BUD:$
Street CIP Funds.
CITY MANAGER REVIEW.~/'
Document Name: #eng3
To:
From:
RE:
Date:
MEMORANDUM
FROM THE
DEPARTMENT OF ENGINEERING
Mayor and City Council
Ken Griffin, P.E., Director of Engineering and Public Works
Consider approval of Change Order #1 for Denton Tap Road Project #ST 94-01 in the
amount of $120,351 to Rebcon, Inc. for the revised bridge railing over Denton Creek; and
authorizing the Mayor to sign.
November 10, 1998
Since the start of construction on the bridge over Denton Creek on Denton Tap Road, questions have
been asked concerning what type of bridge railing would be installed on the bridge. The project was
initially bid with bridge railing very similar to the ones constructed on Heartz Road by the libraps' and on
Parkway Blvd. by Copperstone Addition. Those bridge railings have brick or pilaster columns with
painted tubular steel between the columns. Apparently, some time in the past, there have been
conversations concerning installing identical bridge rails along Belt Line Road / Denton Tap Road.
Currently, the types of bridge railings are cast in place concrete bridge railings. As you drive along
Denton Tap Road, those can be observed at Cottonwood Branch, Grapevine Creek and near the new
IBM building.
To be consistent with the existing bridge railing along Belt Line Road / Denton Tap Road, staff
recommends the deletion of the bridge railing as originally bid and the inclusion of the cast-in-place
concrete bridge railing. Therefore, staff recommends the approval of Change Order #1 to Rebcon, inc~
in the amount of $120,351.
Staff will be available to answer any questions at the council meeting.
"CITY OF COPPELL ENGINEERING - EXCELLENCE BY DESIGN"
November 2, 1998
Mr. Garreth Campbell
City of Coppell Engineering Dept.
P,O. Box 478
Coppell, Texas 75019
\ 2
RE: Denton Tap Road
Dear Garreth:
The redesign of the bridge railing on this project involves the following changes
in costs:
Delete the following from the contract:
19. Furnish and install
special bridge rails
1,487LF $140.00/LF $208,180.00
AIt Item 18 Furnish and
install special bridge
rail per Section 04 Sheet 57
76LF $140.00/LF $ 10,640.00
Total Deductions
$218,820.00
Add the following to the contract:
Concrete bridge rail,
wrought iron fence,
and railing on bike
path below bridge
1563LF $217.00/LF $339,1 71.00
Total Additions
$339,171.00
Total net change to the contract is:
$120,351.00
Rebcon will require an additional 2___0 working days to be added to our contract
to allow this work to be constructed. Please note the following items:
1 ) Because of the deck construction method using precast concrete panels
the outside dowel bars on the pedestals and columns may need to have the
horizontal leg shortened to allow them to fit properly.
2) Dowel bars on the east bridge inside rail will not be placed 11/4" above the
slab bottom but will be some distance above the top of the precast panels.
%,,,_. 1868 w. NORTHWEST H\./VY. DALLAS, TEXAS 7,5220 972/444-8230
3) Our price assumes that the detail of the typical balluster sheet S1A of 9 has 3-
#6 on both sides of balluster top and that the vertical leg of the #5 dowel is
2.75',
4) We are disregarding the plan view and its dimensions on sheet S1 of 9 in lieu
of dimensions and layout shown on SIB of 9.
5) We have budgeted expansion joint cost in our price but need to know
locations for those joints. We feel that the wingwall/column joint should also
go at armor joints. We need to know where you want the rail joints.
6) We do not have any additional deck steel in our price or additional strands in
the beam to carry the additional loading. !f any of this will be required we
,,vii! need to chanae our price.
7) Painting of the concrete rail is included.
Please let us know as soon as possible, if the City wants us to construct this rail. It
is very important in keeping this job moving.
If you have any questions, please let me know.
Yours Very Truly,
REBCON, INC.
Robert C. BiBby
P.O. Box 478
Coppell. Texas 75019
972-462-0022
November 19, 1998
Mr. Robert C. Bibby
REBCON, Inc.
1868 W. Northwest Hwy.
Dallas, TX 75220
RE: Denton Tap Road Project # ST 94-01 (from Cottonwood Creek to S.Ft. t21 gypass)
Dear Mr. Bibby:
Change Order #1 was approved at our November 10, 1998 City Council meeting. Attached a~'e
four copies of Change Order #1 signed by the Mayor. Please execute the: 'foyer ,:c,,ioies~ ;::~.i';¢¥ ,
copy for your file and remm three copies to our office.
If you have any questions feel flee to contact the Engineering Department ~/i: :C!?'7';~.):'~t 3~ ', %' '; :..
Sincerely,
Kenneth M. .iZ.
Director of Engineer and Public Works
co:
Garreth D. Campbell, Construction Inspector
Ulys Lane, P.E., Wier & Associates, Inc.
LETTER OF TRANSMITTAL
FROM:
REBCON, INC.
1868 WEST NORTHWEST HIGHWAY
DALLAS, TEXAS 75220
OFFICE #: (972) 444-8230
FAX #: (972) 444-8234
TO:City of Coppell Engineering Department
ADDRESS:P.O. Box 478
CITY: Coppell
STATE: Texas ZIP: 75019
ATTENTION:Mr. Ken Griffin
DATE: 11-23-98
JOB NO:9809
RE:Denton Tap Road
Cottonwood Creek to S.H.
121 Bypass
City of Coppell
PLEASE BE ADVISED:
WE ARE SENDING YOU:
DATE COPIES
11-10-98 3
PLANS
CONTRACT
LETTER
DESCRIPTION
Change Order No. 1
SHOP DRAWINGS
SUB-CONTRACT
SPECIFICATIONS
X
CHANGE ORDER
SAMPLES
OTHER
THESE ARE BEING TRANSMITTED AS INDICATED BELOW:
FOR APPROVAL X AS REQUESTED
FOR YOUR USE
FOR YOUR
COMMENTS
APPROVED AS IS
RETURNED AFTER
LOANED TO US
COMMENTS:
FOR BID(S) DUE
RETURNED WITH
CORRECTIONS
SIGNED:
TYPED NAME: Robert C. Bibby
CITY OF COPPELL
CHANGE OR EXTRA WORK ORDER
PROJECT:
CONTRACTOR:
OWNER:
CHANGE ORDER NO.:
Denton Tap Road Project # ST 94-01
Rebcon Inc.
City of Coppell
1
DATE:
11/10/98
DELETE:
I~m Quantity
19 1,487
Description
Furnish & install
special bridge rails
Furnish & install
Special bridge rail per
Section 04 Sheet 57
Total Deductions:
ADD:
Alt 76
18
ADD: Concrete bridge rail, 1563
wrought iron fence, &
railing on bike path
below bridge
Total Additions:
20 Working Days
Total Revision to Contract Amount
Previous contract amount
Net increase in contract amount
Revised contract amount
Net increase in contract time of completion
Revised Contract time of completion
Unit Unit Price Total
LF 140.00 208,180.00
LF 140.00 10,640.00
LF
$218,820.00
217.00 $339,171.00
$339,171.00
$120,351.00
$3,572,687.90
$120,351.00
$3,693,038.90
20 Working Days
290 Working Days
Rebcon will require an additional 20 working days to be added to our contract to allow this work to
be constructed. Please note the following items:
1. Because of the deck construction method using precast concrete panels the outside dowel bars
on the pedestals and columns may need to have the horizontal leg shortened to allow them to fit
properly.
2. Dowel bars on the east bridge inside rail will not be placed 1 ~,~" above the slab bottom but will
be some distance above the top of the precast panels.
3. Our price assumes that the detail of the typical balluster sheet S1A of 9 has 3 - #6 on both sides
of balluster top and that the vertical leg of the #5 dowel is 2.75'.
'. Dent6n Tal5 Road Project Sf 94-01
Change Order #1
Page 2
4. We are disregarding the plan view and its dimensions on sheet S1 of 9 in lieu of dimensions
and layout shown on S1B of 9.
5. We have budgeted expansion joint cost in our price but need to know locations for those joints.
We feel that the wingwall/column joint should also go at armor joints. We need to know where
you want the rail joints.
6. We do not have any additional deck steel in our price or additional strands in the beam to carD'
the additional loading. If any of this will be required we will need to change our price.
7. Painting of the concrete rail is included.
The contractor hereby accepts this Contract adjustment as a final and complete adjustment in full
accord and satisfaction of all past and future liability originating under an:,' clause in the Contract
by reason of this revision to the Contract.
r
Recommended by City Engineer Date
r
A~'~xi ,o b~ C~91~Ct~r /: Da~e
^pproved by ~wher