1990-0552651L-9/3689
NO.
AN ORDINANCE AUTHORIZING THE EXECUTION OF A CHANGE ORDER TO A
CONTRACT BETWEEN THE CITY OF DENTON AND TRI-CON SERVICES, INC.;
PROVIDING FOR AN INCREASE IN THE CONTRACT PRICE; AND PROVIDING AN
EFFECTIVE DATE.
WHEREAS, on October 4, 1989, the City awarded a contract for
the construction of certain improvements to Tri-Con Services,
Inc. in the amount of $446,797.50; and
WHEREAS, the City Manager having recommended to the Council
that a change order be authorized to amend such contract with
respect to the scope and price and said change order being in
compliance with the requirements of Chapter 252 of the Local
Government Code; NOW, THEREFORE,
BE IT ORDAINED BY THE COUNCIL OF THE CITY OF DENTON:
SECTION I. That the change order to the contract between the
City and Tri-Con Services, Inc., a copy of which is attached
hereto, in the amount of Twelve Thousand Seven Hundred Ninety
Nine and 40/100 ($12,799.40) Dollars, is hereby approved and the
expenditure of funds therefor is hereby authorized.
SECTION II. That this ordinance shall become effective
immediately upon it passage andja~roval.
~'~ da of
PASSED AND APPROVED this -P y ~~_~ , 1990.
ATTEST:
IFE~ALTERS, CITY SECR '
APPROVED AS TO LEGAL FORM:
DEBRA ADAMI DRAYOVITCH, CITY ATTORNEY
DATE: APRIL 3, 1990
CITY COUNCIL REPORT
TO: Mayor and Members of the City Council
FROM: Lloyd V. Harrell, City Manager
SUBJECT: BID# 1007 - MALONE STREET DRAINAGE IMPROVEMENTS CHANGE
ORDER #1
RECOMMENDATION: We recommend this Change Order MI be approved
in the amount of a $17,199.40 increase. The Contract price will
change from $446,797.50 to $463,996.90.
SUMMARY: This price increase is due to the unexpected required
excavation of rock as per the Contract Terms and Conditions.
Also included are several other changes in the project brought
on by unforeseen happenings and circumstances. The Memorandum
from Rodger McDaniel to Rich Svehla outlines the changes in
detail.
BACKGROUND: City of Denton Change Order Form, Memorandum dated
March 26, 1990.
PROGRAMS, DEPARTMENT OR GROUPS AFFECTED: Engineering Department
and Drainage Improvements Contractor, Tri-Con Services, Inc.
FISCAL IMPACT: Funds for this change will come from the
original source of funding #434-002-G088-8808-9108.
Res~ct f~t~ y submitted:
City Manager
Name: Tom D. Shaw, C.P.M.
Title: Purchasing Agent
Approved
Name: Tom D. Shaw, C.P.M.
Title: Purchasing Agent
027 .DOC
CITY OF DENTON CHANGE ORDER
1. Division (Department)I 2o Purchase Order Noo I 3o Change Order No. Public Works/En~ineerin~ 93185 1
4. Name of Project 5. Project Acct No. 6. Date Prepared
Malone Draina§e 434-002-G088-8808-9108 3-23-90
7. Name and Address of Contractor
Tri-Con Services, Inc. - P.O. Box 286?? Garland, Texas 75041
8. Description of Work Included in Contract
Drainage Improvements for P~lone Street
9. Changes ordered and reason ordered (List individual changes as: A, B, C, D, etc.
See attached
10. Bid Original 'Contract Revised Negotiated Original Revised
Contract Item Estimated Unit Estimated C.O. Unit Estimated Estimated
Changes No. Quantity Price Quantity Price Cost Cost
A.
B. SEE ATTA HED
C.
D.
Total Total
11. Original Contract Price 446,797°50 Increase in Contract Price 17,199.40
New Contract Price 463~996o90 Decrease in Contract Price
12. Contract time increased/decreased by -8- days. New contract time 50 days
THE AFOREMENTIONED CHANGE, AND WORK AFFECTED THEREBY~ IS SUBJECT TO ALL
CONTRACT STIPULATIONS AND COVENANTS.
S~ection Supervisor Date
14. ACCEPTED BY CITY ENGINEER:
Signature Title Date
15. ACCEPTED BY CONTRACTOR:
Signature Title Date
DIREC~R OF UTIL~TI~:
Signature Title Date
CONDITIO~ OF APPROVAL:
17o PURCHASING/FINANCE
Signature Title Date
COUNCIL APPROVAL (If needed)
Date
CITY of DENTON / 215 E. McKinney / Denton, Texas 76201
MEMORANDUM
DATE: March 26, 1990
TO: Rick Svehla, Deputy City Manager
FROM: Roger McDaniel, Engineering Tech Supervisor
SUBJECT: Malone Drainage Overview
Tri-Con Services, Incorporated of Garland, Texas was awarded
the contract for Malone Street Drainage Improvements in
November 1989. The contract pri~e was $446,797.50. Work began
on November 27, 1989.
We encountered rock on the project during the week of December
11, 1989. By December 19, 1989, the contractor had excavated
350 cubic yards. The estimated contract quantity for this item
was 50 cubic yards at $15.00 a cubic yard. We submitted a memo
to the "91" Committee on December 19, projecting between 1200
and 1500 cubic yards as a possible total quantity. The total
amount excavated came to 915.6 cubic yards for a total increase
of $12,984.00.
Considering the existing condition of Gober street along with
the additional problem of introducing the heavy equipment
needed to complete the storm drain, it became evident that more
than the patch over the ditch line would be needed to maintain
this streets serviceability after project completion. The
contractor was counseled that the asphalt patch would fail due
to infiltration of water from the remainder of the street. The
existing street was a seal coat over a subgrade of sand and
river rock. Tri-Con offered to cement stabilize the entire
street from Cordell to Linden at no cost to the City of Denton
if the Street Department would do an overlay. James Corbin
agreed that this was the best solution because of the potential
maintenance problems. He requested that we use the remaining
funds for patch to help pay for the asphalt. Tri-Cons price
for asphalt patch was $40.00 per ton and there was 110 tons
Malone Drainage Overview
page 2
remaining. The Street Department purchases Type D asphalt at
$19.50 a ton. This allowed us to place 225 tons of asphalt on
Gober instead of 110 tons. Additional savings to us were
realized by not bearing the cost of cement stabilizing the
subgrade since Tri-Con provided all material, equipment, and
labor.
Item SP.4 was for lowering waterlines where it was in conflict
with the storm drain. The plans identified these locations and
specified to lower or encase. We did not have a price for
encasement which would be cheaper than the cost of lowering the
waterline. The contractor gave us a price of $500 for each
encasement and the price for lowering was $1,000. We encased 5
waterlines instead of lowering them saving $2,500 overall.
Our specifications require that sanitary sewer when placed
inside a junction box must be replaced with ductile iron pipe.
There were three locations that required this and we did not
have a price for 6" or 8" ductile iron pipe. Upon request, the
contractor gave us prices of $30 a foot for 6" and $35 a foot
for 8" This increased the cost $950. Total overages equal
$17,199.40 or 3.8%.
The following is a break down of over and under by line item.
ITEM DESCRIPTION OVERAGES REDUCTIONS
SP-10 Rock Excavation $12,984.00
3-A Remove Concrete Pavement $ 60.00
8o2-A Concrete Curb & Gutter 3,060.00
5.8A 6" Concrete FLT Wk 120.00
8.3A 4" Concrete Sidewalk 1,152.90
8o3B 6" Concrete Driveway 1,850.00
SP.4 Lower Waterlines 5,000.00
2.12.3A 18" RCP Class III 600.00
2.12.30 24" RCP Class III 800.00
3.9 Sod 82.50
EXTRA Concrete Encase Waterline 2,500.00
EXTRA 6" Ductile Iron Pipe 600.00
EXTRA 8" Ductile Iron Pipe 350.00
TOTAL $23,179.40 $ 5,980.00
There has been at least two heavy rains since construction was
completed and this system functioned.very well.
We are submitting Change Order #1 for the additional work
completed. Please submit to City Council for approval and
final acceptance.
If you need further information, please advise.
Rog0r McDaniel --
0835E