1988-0060923L
NO &-QQJ~P
AN ORDINANCE AUTHORIZING THE EXECUTION OF A CHANGE ORDER TO A
CONTRACT BETWEEN THE CITY OF DENTON AND TONTO CONSTRUCTION, INC ,
AND PROVIDING AN EFFECTIVE DATE
WHEREAS, on February 17, 1987, the City awarded a contract
for the construction of certain improvements to the Water
Treatment Plant Upgrade Phase II, Bid No 9657, and
WHEREAS, the City Manager having recommended to the Council
that a change order be authorized to amend such contract and said
change order being in compliance with the requirements of Chapter
252 of the Local Government Code, NOW, THEREFORL,
BE IT ORDAINED BY THE COUNCIL OF THE CITY OF DENTON
in t the contract amount between the
SECTION I That the change order
City and Tonto Construction,
Thousand Nine Hundred Seventy-eight Dollars and Twenty-five Cents
(12,978 25) is hereby approved and the expenditure of funds
therefor is hereby authorized
SECTION II That this ordinance shall become effective
immediately upon its passage and approval
PASSED AND APPROVED this the 5th day of January, 1988
RAY rT HhNS, MAYOR
ATTEST
JE RI ER WALTERS, CI Y SECRETARY
APPROVED AS TO LEGAL FORM
DEBRA ADAMI DRAYOVITCH, CITY ATTORNEY
BY ~/V
DATE January 5, 1988
CITY COUNCIL REPORT
TO Mayor and Members of the City Council
FROM Lloyd V Harrell, City Manager
SUBJECT CHANGE ORDERS # 5, 7, 9 - TONTO CONSTRUCTION
BID# 9657 WATER TREATMENT PLANT UPGRADE PHASE II
RECOM11ENDATION These change orders above are recommended to be approved by
the staff and the Public Utilities Board
SUMMARY The change orders are explained in full on the attached and
represent only a small percentage of the overall contract price These change orders
when approved will be paid from our purchase order 181945
The total cost of the three change orders is $12,978 25
BACKGROUND Detailed information on each change order with the information
rom t ie ecember 16, 1987 Utility Advisory Board Meeting and Mr R E Nelson,
Executive Director of Utilities
PROGRAMS, DEPARTMENTS OR GROUPS AFFECTED
City of Denton Utilities Water Expansion Project
FISCAL IMPACT There is no additional impact on the General Fund
Respectf ysuubmitted
4/ v/w
Lloyd Harrell
City Manager
Prepared by
1 i1~ G12.~I~Cd~ ~f
me J n J "Marshall, C P M
Title -purchasing Agent
Approved
mei ohn J Marshall, C P M
Titla` Purchasing Agent
n~ CITY COUNCIL AGENDA ITEM
TO MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM Lloyd Harrell, City Manager
January 5, 1987
RE CONSIDER CHANGE ORDERS k5, M7, 8 M8, DENTON WATER TREATMENT
PLANT UPGRADE ~ PHASE II, IN THE AMOUNT OF $12,978 25
RECOMMENDATION
The Public Utilities Board, at their meeting of December 16,
1987, recommended to the City Council approval of Change Order
M5, M7, $ N8
BACKGROUND
Change Order 05 is to relocate power panel "PA" and to change all
the grating from aluminum to fiberglass
Power panel "PA" is being relocated from room 211 to the
mezzanine level Relocating the power panel submitted by Tonto
Construction will better utilize the available space and will
result in a price reduction
Changing the grating from aluminum to fiberglass will provide for
greater resistance to corrosion caused by exposure to chemical
substance Fiberglass was not originally specified because
aluminum had been used in the past
Change Order N7 is for revising the roof drain system This is
required because the existing construction materials indicated on
the as>built drawings were not as thick as those actually used
In order to insure proper roof drainage, the drains were
increased from three to four and relocated This also requires
an increase in the amount of piping used
Change Order N8 is for five miscellaneous items and for adding
clean out unions on certain chemical lines The miscellaneous
items are necessary to accomodate various changes in field
conditions determined during demolition of the existing
facilities
These include adding three (3) 24" x 24" Milco style "K" doors in
the ceiling of the chemical building, modifying the backflow
preventer vault, deleting the raw water sample pump, revising the
test procedures for the Allis°Chalmers pump, and deleting the 2"
vacuum breaker from the sodium hydroxide tank
Page 2
Unions and flange bolt connections are needed on the sodium
hydroxide, ferric sulfate, flouride, and potassium permanganate
lines to provide access points for cleaning The use of wyes,
crosses and tees is prohibited because of limited space in the
ceiling area and interference with other lines Quick
disconnects in the heat tracing system will also be required at
each union
SUMMARY
The City Council awarded the contract to Tonto Construction, Inc
on February 17, 1987, in the amount of $3,592,000 With the
previous change orders of $54,857 56 and these change orders for
$12,978 2S, we now have a revised contract amount of
$3,659,835 81, and a new completion date of July 5, 1988
Overall percent of change order is only 1 89% which is
excellent Most projects run from 3 to 5%
PROGRAMS, DEPARTMENTS OR GROUPS AFFECTED
City of Denton, Denton Municipal Utilities, Freese & Nichols
Inc , Tonto Construction, Inc , and the Citizens
FISCAL IMPACT
Budgeted Amount
Original Contract Amount
Change Orders Prior to this Date
Current Contract Amount
Change Order M5
Change Order M7
Change Order X8
Revised Contract Amount
Total Amount of Change Orders
to this Date
Change Orders as a Percent
of the Original Contract Amount
Original Completion Date June 13, 1988
$4,000,000 00
3,592,000 00
54 857
$~G '"8STY '3
$1,253 85
3,204 25
8 520 15
$3,659:835 81
$67,835 81
1 89%
Change in Time Due to Previous Change Orders 16 Days
Change in Time Due to Change Orders N5, N7, $ N8 6 Days
Revised Completion Date July 5, 1988
Page 3
Respectfully submitted,
Lloyd Harrell, City Manager
Prepared by
C David Ham, D Drector
Water/Wastewater Utilities
Approved by
It h Nelson, Executive Director
Department of Utilities
Exhibit I Change Orders M5, M7 f, k8
PUB Minutes of December 16, 1987
5235U 1~3
MNGE OR EXTRA IORR ORDER
PROJECT: Denton Water Treatment Plant Upgrade - Phase 2
CONTRACT: No 9657
OWNER: City of Denton, Texas
CONTRACTOR- Tonto Construction Co
CHANGE ORDER NO.: Five (5) DATE. September 14, 1987
CEANGE OR EXTRA WORK TO BE PERFORMED
1 Relocate power panel "PA" from room 211 to the meszanine level of
the shop as shown in the attached revision of Sheet 72
Amount to be Credited $1,408 98
2 Change all orating on the pro3ect from aluminum to fiberglass
grating as described in the attached specification Section 06700
MISCELLANEOUS WOOD, PLASTIC, AND FIBERGLASS
Amount to be Added $2,662 83
The compensation agreed upon in this Change or Extra Work Order is a
full, complete and final payment for all costs the Contractor may incur
as a result of or relating to this change whether said costs are known,
unknown, foreseen or unforseen at this time, including without
limitation, any cost for delay, extended overhead, ripple or impact
cost, or any other effect on changed or unchanged work as a result or
this change or Extra Work Order
Previous Contract Amount $ 3,617,055 42
Net Increase in Contract Amount 1,253 85
Revised Contract Amount $ 3 618,309 27
Net Change in Contract Time of Completion No Change
Revised contract time of completion June 29, 1988
Recommended by
FREESE AND NICHOLS, INC
By
Approved by OWNER
By
Approved y CONTR
By
CHANGE 01 EXTRA N0RK 01DEI
PROJECT: Denton Water Treatment Plant Upgrade - Phase 2
CONTRACT: No 9657
OWNER: City of Denton, Texas
CONTRACTOR: Tonto Construction Cc
CHANGE ORDER NO Seven (7) DATE November 9, 1987
CHANGE OR EXTRA WORK TO 09 PERPOR M
Modify the roof drain system for the operations building
as shown on the attached drawings
Amount to be Added S 3,204 25
The compensation agreed upon in this Change or Extra Work Order is a
full, complete and final payment for all costs the Contractor may incur
as a result of or relating to this change whether said costs are known
unknown, foreseen or unforseen at this time including without
limitation, any cost for delay, extended overhead, ripple or impact
cost, or any other effect on chanqed or unchanged work as a result of
this Change or Extra Work Order
Previous Contract Amount $ 3,648,111 41
Net Increase in Contract Amount 3,204 25
Revised Contract Amount $ 3,651,315 66
Net Chance in Contract Time of Completion No Change
Revised contract time of completion June 29, 1988
Recommended by Approved by OWNER
FREESE AND NICHOLS, INC
ey
BY
ADprovpd by CONTO
By
CHANGE OR EXTRA WORK ORDER
PROJECT: Denton Water Treatment Plant Upgrade - Phase 2
CONTRACT: No 9657
OWNER. City of Denton, Texas
CONTRACTOR: Tonto Construction Co
CHANCE ORDER NO. Sight (a) DATE November 17 190
CHANCE OR EXTRA WORK TO BE PERFORMED
1 Furnish and install three (3) 24" x 24" Milco style "K"
access doors in the ceiling of the chemical building
Amount to be added
S 300 00
2 Modify backflow preventer vault and installation of backflow
preventer as shown on attached copy of revised sheet CB-1
Amount to be added
Days to be added
3 Delete raw water sample pump
Amount to be credited
$ 1,571 u5
s
S jbl 00
4 devise test procedures for the Allis-Chalrers horizontal
split-case pumping unit to have manutacturer witness pump test and
provide certitied test curves for approval prior ro shippinq pump
Test is to be oertormed with a factory calibrated test motor
amount to ne credited $ 5U0 00
5 Delete 2 " vacuum breaker trom the dilution water line or the
sodium hydro.cide tank
Amount to be credited $ 175 00
6 Add unions, flange bolt connections and quick disconnects in heat
tracing on chemical lines for sodium hydroxide, ferric sulsate
fluoride, and potassium permanganate at bends as follows
Union/Flange Size
Number
Unit
Price
Amount
4 inch
19
73
19
$ 1,390
61
2 inch
44
46
89
21063
16
1-1/2 inch
61
42
16
J,571
76
1 inch
5
35
57
177
85
Quick Disconnects
26
56
92
1 479
9.2
Amount to be added $7 683 30
Days to be added 3
The compensation agreed upon in this Chance or Extra Bork older is a
full complete and rinal payment ror all costs the Contractor may incur
as a result of or relating to this chance whether said costs are known
unknown toreseen or unforseen at this time including without
limitation any cost for delay, extended overhaad ripply or impact
cost or any other ettect on chanced of unchanged work as a result of
this Change or Extra Work Order
Previous Contract Amount
Net Increase in Contract Amount
Revised Contract Amount
Net Chance in Contract Time of Completion
Revised contract time of completion
Recommended by
FREESE AND NICHOLS
By _
Approved by
CITY OF DENTON
INC
Date
S s 651 J15 6b
6 5L0 15
$ J b5y ssS di
b clays
Jlly ~ 1`ldts
Approved by
TONTO CONSTRUC ON INC
1!e
By
- - - - - -
Date
PAGE 1
EXCERPT
PUBLIC UTILITIES BOARD MINUTES
December 16, 1987
6 CONSIDER CHANGE ORDER 547, & 8, DENTON WATER
TREATMENT PLANT UPGR4DE - PHASE II, IN THE AMOUNT OF
$121978.25
Ham presented this item with a short review of the change order
requirements. Chew made a motion to recommend to the City
Council approval of this change order Second by LaForte, all ayes,
no nays, motion carried.