1993-0662517L/1589
NO. .3 -do
AN ORDINANCE AUTHORIZING THE EXECUTION OF A CHANGE ORDER TO A
CONTRACT BETWEEN THE CITY OF DENTON AND GRACON CONSTRUCTION ;
PROVIDING FOR AN INCREASE IN THE CONTRACT PRICE; AND PROVIDING AN
EFFECTIVE DATE.
WHEREAS, on JULY 21, 1992 , the City awarded a contract for
the construction of certain improvements to PECAN CREEK WASTEWATER
TREATMENT PLANT IMPROVEMENTS in the amount o 8,647.000.00 ; an
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 ON CONSTRUCTION , a copy of which is
attached ereto, n the amount o ONE OUSAND ONE HUNDRED ,
EIGHTY SEVEN AND no/100------------------ O ars 71,187.00 , Is
hereby approved an t e 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 p-11144J day of 1993.
BOB CASTLEBERRY,
ATTEST:
A"ROVE]Y AS TO LEGAL FORM :
DEBRA ADAMI DRAYOVITCH, CITY ATTORNEY
BY: A/~ "
C ~j
CHANGE ORDER [CO]
PAGE 1 OF 3
Project: Pecan Creek WWTP Improvements Proiect Numbers
Owner: City of Denton. Texas Owner: U-102 (City)
Engineer: Alan Plummer and Associates In Engineer: 457-0425(APAI)
Contractor: Gracon Construction Company Contractor:9203
Change Order No: 05 Date: _ 03/30/93
The compensation agreed upon in this Change Order is a full, complete and
final payment for all costs the Contractor incurs as a result of or
relating to this change, whether said costs are known, unknown, foreseen or
unforeseen at this time, including without limitation, any costs for delay,
extended overhead, ripple or impact cost, or any other effect on changed or
unchanged work as a result of this change.
CHANGE ORDER WORK TO BE PERFORMED
Proposed Contract
Modification
1. Reference CMR 46:
Time Extension/Days Amount $
This CNm charges the City for
applying Concrete Gunite to slopes
of the Diurnal Equalization Basin 0 $61,237.00
2. Reference CMR 43:
TOTAL
This Cam charges the City for
applying Hydromulch to slopes of
the Storm Water Equalization Basin 0 $9,950.00
0 $71,187.00
Exhibit I
CHANGE ORDER [CO]
Original Contract Amount (Gracon Construction Co.)
Net Increase or Decrease in Contract Amounts:
PAGE 2 OF 3
$ 8,647,000
Previous
Change Order No. 1 6,125.00>
Previous
Change Order No. 2 9,640.97>
Previous
Change Order No. 3 $ 2,982.00
Previous
Change Order No. 4 4,950.83>
This Change Order No. 5 $71.187.00
Total of
Change Orders
$53,452.20
Revised Contract Amount
$8,700,452.20
Net Change in Contract Time
0 Calendar Days
Revised Contract Completion Time
730 Calendar Days
Percent Change
Order per Original Contract Amount
0.62V
ATTACHED: CM 46, 43
Distribution:
457-0425 D.22
457-0420 D.22
Gracon Construction:
Joe Graves
Ron Janson
City of Denton:
Dave Ham
Purchasing
Finance
R. E. Nelson
Lee Allison
CHANGE ORDER [CO] 3 ?age of 3
Recommended by
Consulting Engineer:
ay ~LA~ 2~l
for Alga lumo:er
and As/OCiates, Inc.
Date : 3-T~►,_ 4 3 "
Approved by Contractor
By Si
f aeon Construction In 6.
Date: 331 A3
Approved by Manager of Construction projects:
Sy 67, ca~~P44-j
for Citg of Denton, Texas
Approved by purchasing Agent
for city of Denton, Texas
Approved by Director of Water Engineering and Operations
Sy
or Ciy of Denton, Texas ($0 - $5,000)
Approved nceautive Director of Utilities
By ($a,00i - for City of Denton, Texas $14,999)
Approved by city Council
SY , City manager
for City of Denton, Texas ($15,000 and above)
.up
DATE: APRIL 27, 1993
CITY COUNCIL REPORT
TO: Mayor and Members of the City Council
FROM: Lloyd V. Harrell, City Manager
SUBJECT: CHANGE ORDER #5 - GRACON CONSTRUCTION
RECOMMENDATION: We recommend that change order #5 be approved in the amount
of $71,187.00 to Gracon Construction Co. for the Wastewater Treatment Plant
Improvements contract.
SUMMARY: This change order is for (1) $61,237.00 to "Gunite" stabilize the side
slopes of the Diurnal Equalization Basin and (2) $9,950.00 to "Hydromulch" stabilize
the side slopes of the Storm Water Equalization Basin (Total $71,187.00). The
Equalization basin is of earthen construction and is composed of two chambers; one
for Diurnal (midnight to midnight) flow fluctuation and one to accommodate inflow
during storm events. The side slopes of the Diurnal Equalization basin and the
Storm Water Equalization Basin were designed with concrete slope stabilization. The
final Engineer's Estimate (Alan Plummer and Associates) for this project indicated
this concrete stabilization for these two Equalization Basins would be costly and
would exceed our budget for this project of $11,000,000. The concrete stabilization
therefore was deleted. However, the low bid for this contract by Gracon
Construction Company came in at $8,647,000. With the construction of these
Equalization Basins almost finished, the side slopes have experienced considerable
erosion after the heavy rains. Continued erosion of soil into the bottom of these
Basins will cause a serious operational and maintenance problem when soil gets into
the pipes, pumps and other wastewater treatment equipment.
Alan Plummer and Associates has recommended concrete "Gunite" side slope
protection for the Diurnal Equalization Basin and "Hydromulching" grass protection
for the Storm Water Equalization Basin to solve this problem.
BACKGROUND: Executed change order recommendation documents, contractors
modification request, Gracon proposal, Gracon letter date 3-19-93; excerpt minutes
for PUB meeting of 4-5-93.
DEPARTMENTS OR GROUPS AFFECTED: Citizens of Denton, Denton
, and Gracon
CITY COUNCIL REPORT
APRIL 27, 1993
PAGE 2 OF 2
FISCAL IMPACT
Alan Plummer and Associates Engineer's Estimate
Original Contract Amount (Gracon Construction Co.)
Net Increase or Decrease in Contract Amounts:
Previous
Change
Order
No.
1
6,125.00>
Previous
Change
Order
No.
2
9,640.97>
Previous
Change
Order
No.
3
$
21982.00
Previous
Change
Order
No.
4
4,950.83>
This Cha
nge Ord
er No.
5 $71
,187.00
Total of Change Orders
Revised Contract Amount
Net Change in Contract Time
Revived Contract Completion Time
% of all Change Orders per Original Contract
$11,000,000
$ 8,647,000
$53,452.20
$8,7001452.20
0 Calendar Days
730 Calendar Days
0.62%
peccttffully submitted:
Lloyd V . Harrell
City Manager
Approved:
Name: Tom D. Shaw, C. P.M.
Title: Purchasing Agent
agenda.361
2CN'YAC'CR'z uC0lr`A'iCN - E'^L ,
E., LLi
CWNE.R C17Y OF OE.NTCN I 040 s` Nn
?RCZC' ' ?CAN C,RZEEX w TP IMPROVEMENTS 1 OWNER U102
CONTRACTOR JRACCN CCNSTRUC710N INC.
1CCNTRACTOR 9203
ENGUN M ALAN PLUMNIS ANO ASSOCIATES INC. ENGINEER 457-0425
RESIDENT REPRESENTATIVE CLE T E MARTIN nua Mm 14
3 1
NOTIFICATION BY CONTRACTOR:
WE ARE PROPWNO TO MAKE THE CHANGE TD THE CONTRACT OFSCRNBBD IN THE ATTACHED MATI,RW.S
AND REM= THAT Your ME THe F=wM ACTION:
❑ NOTIFY US THAT YOU CONCUR THAT THIS CHANCE DOHS NOT REQUIRE A CHANCE !N CONTRACT
TIME OR AMOUNT AND ISSUE A I= ORDER.
ISSUE A CHANGE ORDER FOR PER1~'CRMING THE DESCRIBED CHANGE, CHANGE IN CONTRACT AMOUNT
AND TIME ARE INDICATED IN ATTACHED OLTAIU ED COST BREAKDOWN AND REVISED SCHEDULE.
C ISSUE A CHANCE ORDER FOR THE OESCRIBED CHANCE MATH PAYMENT AT THE UNIT PRICE MO.
r
BY:
CMTRAC"OR M. PROCEED MTN THE OW= UNDER THE TIME AND MATMALS
THE CONIRACr.
OATS
E'NGIN'E RESPONSE:
W RESPOND TO YOUR REQUEST AS ~vLLoft
Q WE CONCUR THAT THIS IS A NO CAST at TIME CHAW& SEE ATTACHED 1=1ELID ORDER
FOUR PROPOSAL IS RECCMMVJM TO THE OW ML SEE ATTACHED CSIANGE ORDER
Q PROC£EJ' MATH THE CHANCE AT THE UNIT PRICE BID. SEE ATTACHFA CHANC;< ORDER
Cf P WITH AN "Illlt THE 71ME AND MATERIALS PROMMINS O► TM CONTRACT.
BY: OATS 3 3/ 9 3
ACTION TAKEN:
❑ PROPOSED CONTRACT MODIFICATION RE.EM CONTRACTOR NOTIFIED NOT TO PROCEED.
Brt DATE:
CI mw ORDER ISSUED: No. OATE n
MANGE ORDER ISSUED: NO. DATE 3 gT; 6/°M-
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March S. 1993
Rubel's Landscape Services
Specifications for establishing of vegetation at Pecan Creek Waste Treatment
Plant, 1100 Mayhill Road, Denton, Texas.
1. HYDROMULCHING:
A. Seed - It is proposed that a seed mixture of 2 to 4 pounds of annual
rye grass and 2 pounds of unhulled bermuda grass be applied per 1.000
square feet of area.
B. Mulch - Cellulose fiber mulch will be applied at the rate of 50 pounds
per 1,000 square feet.
C. Fertilizer - A 16-20-0 or 13-13-13 analysis fertilizer will be applied
at the rate of 20 pounds per LOD square feet.
D. Tackifier - A sufficient quantity of tackifier will be used to hold hy-
dromulch mixture in place until turf establishment, with a minimum of
one pound per 1,000 square feet.
2. WATERING:
Watering will be the responsibility of Rubel 's Landscape Services. A tem-
porary irrigation stem, using aluminum irrigation pipe, will be set up.
Rubel 's will instasyll and operate the irrigation systes. until a uniform stand
of grass is established. Mater will be obtained from two existing fire hy-
drants located on the site. Water will be furnished by others,
3. MAINTENANCE:
4. GUARANTEE:
After grass growth has started, all areas or parts of areas which fait to
show a uniform stand of grass for any reason whatsoever shall be reseeded
as necessary.
CONTRACTOR'S MODIFICATION REQUEST [CMR]
OWNER CITY OF DENTON PROJECT NO,
PROJECT PECAN CREEK WWTP IMPROVEMENTS OWNER 0102
CONTRACTOR GRACON- CONSTRUC71ON INC. CONTRACTOR 9203
ENGINEER ALAN PLUMMER AND ASSOCIATES. INC. ENGINEER 457-0425
RESIDENT REPRESENTATIVE CLETE MARTIN CMR NO. q (,n j
NOTIFICATION BY CONTRACTOR: &u
WE ARE PROPOSING TO MAKE THE CHANGE TO THE CONTRACT DESCRIBED IN THE ATTACHED MATERIALS
AND REQUEST THAT YOU TAKE THE FOLLOYNNG ACTION:
❑ NOTIFY US THAT YOU CONCUR THAT THIS CHANGE DOES NOT REQUIRE A CHANGE IN CONTRACT
TIME OR AMOUNT AND ISSUE A FIELD ORDER.
ISSUE A CHANGE ORDER FOR PERFORMING THE DESCRIBED CHANGE CHANGE IN CONTRACT AMOUNT
AND TIME ARE INDICATED IN ATTACHED DETAILED COST BREAKDOWN AND REVISED SCHEDULE
❑ ISSUE A CHANGE ORDER FOR THE DESK CHAN'- WITH PAYMENT AT THE UNIT PRIG: BID.
13
BY:
DATE /Z~--
ENGINEER'S RESPONSE:
WE RESPOND TO YOUR REQUEST AS FOLLOYYS:
❑ WE CONCUR THAT THIS IS A NO COST OR TIME CHANGE SEE ATTACHED FIELD ORDER.
_'~'WR PROPOSAL IS RECOMMENDED TO THE OWNER. SEE ATTACHED CHANGE ORDER.
PROCEED MATH THE CHANGE AT THE UNIT PRICE BET. SEE ATTACHED CHANGE ORDER.
❑ PR ='M CH UNDER THE TIME AND MATERIALS PROVISIONS OF
2 7,
BY: DATE: 3
3
ACTION TAKEN:
❑ PROPOSED CONTRACT MODIFICATION REJECTED. CONTRACTOR NOTIFIED NOT TO PROCEED.
BY: DATE
FIELD ORDER ISSUED: NO. DATE BY: ~ l
CHANCE ORDER ISSUED: NO. DATE 3 3/ g3 BY. `~C, : ~57~`~Z S J ~ 8
YS7-~yZo i~. TRACTOR TO PROCEED WITH THE CHANGE UNDER THE TIME AND MATERIALS
CONTRACT.
' ' 1, 1 v=
9
zm' " MAILING ADDRESS: P.O. BOX 850756, MESQUITE, TEXAS 75185-0756, PHONE: (214) 222-8533
_ Fax: (214) 222-8542
March 11, 1993
Alan Plummer & Associates, Inc.
210 West Sixth Street, Suite 400
Fort Worth, Texas 76102-4803
Attn: Clete Martin
Re Pecan Creek Wastewater Treatment Plant -
Denton, Texas
Dear Clete:
We propose to place a gunite slope protection on the slopes of
the diruanal basin as per the following specifications:
3000 psi gunite - 3" thick
6-6-10-10 wire mesh
1-3/8" rebar in anchor trench @ top
broom finish
Our proposed cost per sq. ft. is $2.09. The total area on the
slopes is 29,300 sq. ft.
- This price is goad for any quantity from 20,000 to 3,000 sq. ft.
Very truly yours,
GRACON C STRU
By
R. Janson
RLJ/ss
ION, INC.
STREET ADDRESS: 4343 LASATER. MESQUITE, TEXAS 75181
Alan Flu.er
and ASSO( tes, ISC.
ENVIRG'•HENTAL CIVIL ENGINEERS
457-0420
March 19, 1993
Mr. Robert E. Nelson, P.E.
Executive Director
Denton Municipal Utilities
215 East McKinney Street
Denton, Texas 76201
RE: Pecan Creek Wastewater Treatment Plant Improvements
Equalization Basin Slope Protection
Dear Mr. Nelson:
James L. Altstaetter, P.E.
John H. Cook, P.E.
Peggy W. Glass. .
Alan H. Plummer. Jr
Richard H. Smith, P E.
As you are aware, Gracon Construction Company is proceeding ahead of schedule with
construction of improvements to the City's Pecan Creek Wastewater Treatment Plant.
Construction of both the Diurnal and Storm Water Holding Basins is now nearing completion.
With the recent rains, we have observed substantial erosion of the Diurnal Basin slopes resulting
in a considerable amount of silt being deposited in the basin effluent channel. This could
eventually result in blockage of the effluent line to the return pumps if left unchecked
We recommend that the slopes of the diurnal basin be protected to eliminate the erosion by
guniting the side slopes of the basin. Gracon has quoted a price of approximately $65,000 to
perform this additional work, if the work is approved prior to installing the air diffusers in the
bottom of the basin. After the air diffusers are installed, the price would increase significantly
because all work would have to be done from the top of the basin.
Initially, we had included concrete paving of the diurnal basin slopes as part of the construction
project. However, after our final opinion of p.obable construction cost indicated that the project
might exceed the project budget, and the prc jected cost for the concrete slope protection was
approximately $200,000, the slope protection was deleted from the project.
We feel the pneumatically applied concrete, gunite, is a cost-effective alternative to provide the
slope protection necessary and recommend that the City authorize Gracon to proceed with this
additional work.
ESNIBIT II
210 Wet. Sixth Street 0 Sutte 400 • Fort Worth, Texas 76102.4803 • (817) 3324085 • Metro (817) 429-9567 • FAX: (817) 338-4626
Mr. Robert E. Nelson, P.E.
Page 2
March 19, 1993
If you have any questions concerning this matter or require any additional information, please
let me know.
Sincerely,
ALAN PLUMMER AND ASSOCIATES, INC.
/ "/'g-
A. Lee Head, III, P.E.
Enclosure
ALH:mds
cc: Mr. C. David Ham, City of Denton, Texas
Mr. Lee Allison, Director of Engineering, City of Denton, Texas
Mr. Howard Martin, Director of Environmental Operations, City of Denton, Texas
Mr. Clete Martin, Alan Plummer and Associates, Inc., Fort Worth, Texas
EXCERPT FROM
PUBLIC UTILITIES BOARD MINUTES
April 5, 1993
The following item was considered:
5. CONSIDER CHANGE ORDER NO. 5 IN THE AMOUNT OF $71,187.00 TO
GRACON CONSTRUCTION CO. FOR THE WASTEWATER TREATMENT PLANT
IMPROVEMENTS CONTRACT.
Ham reviewed this item. After extensive discussion, Laney
made a motion to approve Item #1 as presented. Second by
Giese. All ayes, no nays, motion carried.
pub excerpt
2/03/93