HomeMy WebLinkAbout17- Change Order 2 - Montana Civil Contractors, Inc. - 5.3 MG Water Storage Tank Project CHANGE ORDER
No. 2
DATE OF ISSUANCE October 10th,2017 EFFECTIVE DATE Upon Owner Authorization
OWNER City of Bozeman CONTRACTOR Montana Civil Contractors,Inc.
Contract: Dated May 5',2017
Project: 5.3 MG Water Storage Tank OWNER's Contract No.
ENGINEER Robert Peccia&Associates ENGINEER's Contract No. 14702
You are directed to make the following changes in the Contract Documents:
Description:
1) Coring pipe penetrations for air release vaults is an increase of$265.94.
2) Time and materials for pipe realignment is an increase of$4,000.00.
3) Removal of 5' of clean compacted structural backfill around tank perimeter is a decrease of$27,000.00.
4) Change to flow meter vault is an increase of$11,500.00.
5) Change to ASR mitigation for change to concrete mix design is a decrease of$25,000.00.
6) Time extension: 10 calendar days for change order related work and 7 weather calendar days= 17 total
Reason for Change Order: Changes during construction to the contract.
Attachments:None
CHANGE IN CONTRACT PRICE: CHANGE IN CONTRACT TIMES:
Original Contract Price Original Contract Times:
Substantial Completion: 300 calendar days
$7,665,349.00 Ready for final payment:
(days or dates
Net(Increase)from previous Net change from previous Change Orders No. 0 to No.
Change Orders No.0 to 1: 1
Substantial Completion: No Change
$2,885.00 Ready for final payment:
(days)
Contract Price prior to this Change Order: Contract Times prior to this Change Order:
Substantial Completion: 300 calendar days
$7,668,234.00 Ready for final payment:
(days or dates
Net(Decrease)of this Change Order: Net(increase)this Change Order:
Substantial Completion: Seventeen calendar days(17)
($36,234.06) Ready for final payment:
(days)
Contract Price with all approved Change Orders: Contract Times with all approved Change Orders:
Substantial Completion:317 calendar days
$ 7,631,999.94 Ready for final payment:
(days or dates)
Contractor certifies and agrees that there are no additional costs or claims for extra work,additional time,delays or
omitted items, of any nature whatsoever, associated with the subject change order items, except as identified and
set forth herein and unless expressly stated otherwise in the Change Order. And further,that the price agreed-upon
herein represents the full st and value for the subject work performed and the materials supplied under the terms
of c ract and that rk quantities and value were properly determined and are correct.
O 2
CONT T R( thorized Signature) Da e
RECOMMENDEDb _�+1nk-cA/ BY: APP VED B
! /0l/lI l lam` l 7
(f,NGINEER- Sig ature) Date OWNER(Authorized Signature) Date
CHANGE ORDER FORM
Pagel of 2
CHANGE ORDER
INSTRUCTIONS
A. GENERAL INFORMATION
This document was developed to provide a uniform format for handling contract changes that affect Contract
Price or Contract Times. Changes that have been initiated by a Work Change Directive must be incorporated into
a subsequent Change Order if they affect Price or Times.
Changes that affect Contract Price or Contract Times should be promptly covered by a Change Order. The
practice of accumulating Change Orders to reduce the administrative burden may lead to unnecessary disputes.
If Milestones have been listed in the Agreement,any effect of a Change Order thereon should be addressed.
For supplemental instructions and minor changes not involving a change in the Contract Price or Contract Times,
a Field Order should be used.
B. COMPLETING THE CHANGE ORDER FORM
Engineer normally initiates the form,including a description of the changes involved and attachments based upon
documents and proposals submitted by Contractor, or requests from Owner,or both.
Once Engineer has completed and signed the form, all copies should be sent to Owner or Contractor for approval,
depending on whether the Change Order is a true order to the Contractor or the formalization of a negotiated
agreement for a previously performed change. After approval by one contracting party,all copies should be sent
to the other party for approval. Engineer should make distribution of executed copies after approval by both
parties.
If a change only applies to price or to times, cross out the part of the tabulation that does not apply.
CHANGE ORDER FORM
Page 2 of 2
ROBERT PECCIA & ASSOCIATES
Mal
October 27, 2017
Bob Murray—City Engineer
City of Bozeman Public Works
20 East Olive, P.O. Box 1230
Bozeman, MT 59771
RE: 5.3 MG Water Storage Tank—Change Order#2 Summary
Bob,
Please see the Summary of Change Order#2 below.
Item #1 —Coring;for Air Release Vaults: RPA reviewed the air release vault submittals and
assumed that the contractor was going to core the 6" pipe penetrations in the field. Piping was
clearing shown on Sheet C-14. There were no indications on the contractor's submittal for the
piping leaving the air release vault. We only recommend $265.94 for this item.
Item#2—T&M for Pipe Re-alignment: RPA feels that this pipe re-alignment was caused in part
by working with the contractor/supplier to save money on coupling and fittings. In our review of
the submittal, it was not clear from the dimensioned profile that there was a conflict. We feel
that only half of the requested cost is warranted in a change order, or$4,000.00.
Item#3 -Removal of 5' of Clean Compacted Structural Backfrll Around Tank: RPA agrees with
a credit to the City of-$27,000.00 to remove the compacted clean structural backfill from around
the tank. This gravel was not needed with the Miradrain 6200 Drainage Panels around the tank.
Item #4 -Change to Flow Meter MH:RPA agrees with this item for$11,500.00 and 1 calendar
day is warranted for a change order for the flow meter manhole change. The new flow meter
MH will provide additional room to work and access door,to avoid classifying the manhole a
confined space.
Item#5—ASR Mitigation: RPA agrees with a credit to the City of-$25,000.00 for ASR
Mitigation Addition to Concrete Mix Design. Additional ASR Mitigation was going to be
needed if concrete was supplied by Bozeman plants, but the contractor decided to use a
Livingston supplier instead, allowing less ASR Mitigation.
Item #6 - Time Extension: 10 calendar days C.O. work+ 7 weather calendar days= 17 extra
calendar days
Please call me if you have any questions.
Sincerely,
ROBERT PECCIA&ASSOCIATES
Chris Hayes, P.E.
Project Manager
2 1 P a g e
Request for information
RFI-001
TANKS -
v
To: MONTANA CIVIL CONTRACTORS INC Project: 5.33 MG RESERVOIR,BOZEMAN,MT
Contact: Owen Strods Job No: 1102-01
From: DN Tanks, Inc. Date: 06/06/2017
Contact: Tyler Inderwiesche Required: 06/13/2017
Subject: ASR Mitigation
Request:
DN Tanks is proposing to utilize 25%fly ash in each of its concrete and shotcrete mixes in lieu of lithium to mitigate the potential for alkali-silica
reaction(ASR).DN Tanks has been informed by its intended concrete supplier,Fisher Sand and Gravel,that the use of 25%fly ash in the concrete
mix has a low potential for deleterious expansion due to ASR per ASTM C-1567"Determining the potential for Alkali-Silica Reactivity of Combinations
of Cementitious Materials and Aggregate"(See attached test results in conformance with ASTM C-1567).Fisher Sand and Gravel also noted that they
commonly use 25%fly ash in their concrete mixes in lieu of lithium with great success in mitigating ASR.In addition,DN Tanks has successfully used
aggregates from Fisher Sand and Gravel's Livingston Pit(the same source intended for use on the 5.3MG Bozeman,MT Tank)with fly ash in lieu of
lithium on the"Fishing Bridge Tank"in Yellowstone,WY in the summer of 2015.Please confirm that the use of 25%fly ash in lieu of lithium in the lank
concrete and shotcrete mixes is acceptable.If the use of 25%fly ash in lieu of lithium is approved,DN Tanks will provide a credit of$25,000 back to
the owner.
Suggestion:
Answer:
Answered By:
Date:
Signed:
Distribution:
This memorandum is intended to the use of the recipient only
if you have received this memorandum in error. Please notify the sender and dispose of this document
J=MTflNq1NEER1NG
R A T O R I E S
C o n s t r u c t i o n M a I e r i a 1 s T e c h n o I o g i e s
G e o t e c h n i c a I , E n v i r o n m e n t a l , & Materials Engineering/T e s t i n g/ R e s e arch
August 23,2014
Knife River
5450 West Gowen Rd. ASTM C-1567, Determining the Potential Alkali-Silica Reactivity of
Boise,ID 83709 Combinations of Cementitious Materials and Aggregate
Project#6550
Project:ISA Lake Bridge
Identification:
Date Cast: August 7,2014
Coarse Agg Source: Livingston Pit Percent Coarse Agg. 60%
Fine Agg Source: Livingston Pit Percent Fine Agg. 40%
Cement Source&Type Holcim V Test Type:
Fly Ash Source: Coal Creek Curing Temp.= 176+_3.6F
Fly Ash Percentage: 25% Replacement Total Alkali(Na20)= 1N
Water/Cement Ratio= 0.47 Lab#: 437301
Age in Age in Percent Date
Days NaOH Change Specification Measured
2 0 0.00 9-Aug
7 5 0.02 14-Aug
12 10 0.04 19-Aug
16 14 0.08 0.1 23-Aug
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0 2 4 6 8 10 12 14 16
Sincerely,
4_jg�)
Manager
11 ' Montana
civil
Contractors Inc.
P.O. Box 1019, Belgrade, AIT59714 inviv.monhanncnvil.com T: 106-388-1740 F:406-388-5105
Project: 5.3 MG Water Storage Tank Date: August 29, 2017
Dear Chris,
In reference to our conference call on 8/16/2017 and upon request for RPA, below is the
information, details and compensation requests for the following items below for your review.
Item one refers to the 3" structural and 1" leveling course that was placed under the
foundation of the tank. To start, per the bid plans and drawings from SK geotechnical, it was
intended that the 3" structural fill was to be placed in lifts, and compacted to 100% in an area
from the center of the tank to 105.5 Ft from the center of the tank or better described as the
edge of the foundation footing. The angle of repose was to then have a slope of.5/1 down to the
5175 Ft subgrade floor elevation. This is what MCC had accounted for in the bid, per the
drawings. Upon installation, it was mutually agreed between MCC and the onsite field
representative, that the edge was to be move out past the 105.5 FT point to account for a more
stable footing edge that would result in a better product. The edge was built out several feet, in
some places out to 113 Ft from center, and then stair stepped up with the backfill of native sub
soil. This equated to an increase in the amount of 3"that was placed onsite vs. what had been
bid. Additionally, the design plans also showed a 1% slope from the center of the tank to the
outside of the footing edge. During the middle of the backfill operations, the slope was increase
to a 1.5% slope per talks with DN tanks and engineers. This too led to an overrun in the amount
of 3"gravel to be placed vs what was bid.
In addition to the 3"structural, MCC also had an overrun in the total quantity placed of 1"
structural leveling course compared to what had been accounted for in the bid. During
placement, MCC had accounted for placement and compaction of 1"to go to the 105.5 mark
and then slope off per DN tank plans. After placement and during finish work, MCC was
informed by DN tanks that they would need an additional 2 FT of compacted edge to support
their forms. This additional 2 FT was not accounted for and required additional material.
Essentially, MCC had bid the structural backfill based off of the bid drawings that had the
subgrade floor elevation at 5175 FT and a finish floor elevation of 5182 minus the 6 floor slab
giving the total depth of 6.5 FT with a 1% slope to the outside. MCC bid the quantity of this at
these dimensions plus 20%to account for roughly 10,500 CY of combined 3"gravel and 1"
gravel. After completion of structural backfill operations and placement of material hauled
onsite, MCC placed roughly 12,600 CY of combined 3" and 1" gravels. Respectfully, MCC
requests compensation for the additional 2100 CY at the additional fill bid item unit price of
$33/CY. This would cover the cost of the procurement of said gravels, placement, compaction,
finishing, QC, overhead and taxes. In addition to the compensation, its estimated that an
additional 5 calendar days were used up to complete this task. With that, MCC respectfully asks
that these 5 calendar days be recuperated into the contract time.
• 2100 CY at$33/CY: $69,300.00
FIl ' Montana
civil
-�'"' Contractors Inc.
Item two is in regards to the 30mil PVC liner that was placed under the 1" structural
leveling course. To begin, after award, it was brought to MCC's attention by DN tanks, that the
form stakes that they were to use for the footing forms were going to penetrate the 30 mil liner
that was designed to go out to roughly 113 FT from the center of the tank and only be about 6"
to a 12" below the foundation footing. The stakes were to be driven roughly 2 FT into the ground
thus damaging the liner. It was then during installation, that MCC decided that the only suitable
course of action was to leave the liner short at 107.5 FT from the center of the tank, 2 FT past
the foundation footing edge and what was believed to be enough to account for the 105.5 FT
compaction and angle of repose of the gravels. The liner subcontractor would then remobilize
after completion of the tank and weld on the remaining liner.
Since the tank had been designed by DN tanks and that there had been design talks
before the pre-bid between DN tanks and RPA, MCC's feels that it was a design issue to have
the liner installed to the full 113 FT mark initially before the tank was to be constructed as shown
in the bid drawings. Additionally, after the liner was installed and cut the 107.5 FT mark and
since DN later on required additional gravels to be placed on the footing edge to account for
their foundation forms, the liner at the 107.5 FT mark was thus covered by the 1" compacted
gravels. This will now lead to additional efforts by MCC crews and the liner subcontractor to
recover the liner edge, weld and place the remainder of the 30 mil PVC liner.
Additionally, the liner subcontractor had to add additional material to secure the PVC
liner to the pipe blocks. The bid had been based of the C-5 drawing which shows the liner going
over the pipe blocks with no vertical concrete collars, thus just requiring pipe boots. Though the
detail does show a riser detail, both sheets still contradict each other and lead to confusion thus
the cause for the misinterpretation. The submittal supplied by the liner subcontract had also
been approved by engineers. That being said, MCC believes it only to be fair to be
compensated for the additional cost incurred by MCC from the subcontractor as well as for the
additional mobilization and time required to uncover and re-weld to the existing liner.
• Additional Batten Attachments: $1,500.00
• Additional Mob: $3,500.00
• Additional Welding and Repair: $2,300.00
• T&M to uncover liner edge: $4,500.00
Item three is in regards to the air release vaults. Upon receiving the shipment of the
vaults from Forterra, it was noticed that the top barrel sections did not have the block out
required to allow for the penetration of the 6" piping for the air vacs. In the submittal provided by
Forterra, nothing had been mentioned of the missing holes per the engineer's transmittal and
approved re-submittal. Since this was missed by both MCC and the engineers who
subsequently hold the reviewing and approval power, MCC believes that it only be fair that the
cost to core the two holes be shared between MCC and the owners.
• Coring of 2 ea 12" Dia Holes: $531.87/2 = $265.94
Lastly, during the bidding process, MCC's chosen pipe supplier spoke directly to RPA
design and project engineers about the approval to use the flex ring restrained ductile iron pipe.
After receipt of award, American pipe furthermore, worked directly with RPA to tweak the design
1
Montana
civil
Contractors inc.
of the pipe that was to better suit the project and provided a better end result. A small stationing
change was also discussed and designed between American and RPA to fix a bust in the
design/bid drawings. This revised design was then submitted and approved by RPA and then
installed per that design. Upon conclusion of the installation and the backfill surrounding, it was
brought to MCC's attention that the vertical rise of the pipe was to interfere with DN tanks wire
strand machine. It was under MCC's impression that all the pipe drawings had been accepted
and approved thus meaning everything was to clear, especially since DN tanks had been
involved in the design of the tank well before the bidding process. However since the clearance
was to be of an issue and that time was of the essence to remediate the issue, MCC put in
nearly two days of time as well as materials to realign the inlet and outlet pipes to give DN tanks
the clearance needed. That being said, MCC feels it only appropriate to request compensation
for the time and materials put forth to roll the 45* bends and re-align the pipe alignments. The
two pipe adjustments above took a total of 2 calendar days, 1 per each, in which MCC also
respectfully asks be added back to the total contract time.
• T&M for Pipe Re-alignment: $8,000.00
In conclusion, with the above mentioned items that have been addressed, it is MCC's
belief that these are fair and honest requests for compensation of these unforeseen changed
items and circumstances. It is by no means MCC's intention to nickel and dime the engineers
and owners. It is our sole goal to provide a product that meets and or exceeds the expectations
and to build a superior quality product.
In addition to the items discussed above, encompassed below, are the two price
changes associated with the change in design for the flow meter access vault as well as the
revised design of the ring drain system. Each item has been priced according to the design
provided by RPA.
• Item one: Price is an add on to bid item 2 (5.3 MG Concrete Tank) 2n under the
schedule of values provided by MCC to RPA. This price is to be added to the current
$113,139.54. With this item, MCC requests an additional 4 days be added to the
calendar day contract time.
Revised Ring Drain Add on: $49,000.00
• Item two: Price is an add on to bid item 8 (Flow Meter MH) 8d under the schedule of
values provided by MCC to RPA. This price is to be added to the current$60,000.00.
With this item, MCC requests an additional 1 day be added to the calendar day contract
time.
Revised Flow Meter Manhole Add on: $11,500.00
Montana
civil
�- Contractors Inc.
All in total, adding in the $27,000.00 credit for the deduct of the 5' clean gravel structural
fill around the outside diameter of the tank and the $25,000.00 credit for the ASR mitigation
addition to the concrete mix designs, all said above items totaled together come to the following
total below along with the requested time extension to be added to the contract calendar days.
Change Order#2 $97,865.94
Time Extenstion request: 12 contract calendar days
Weather Day Addition: 7 contract calendar days
Sincerely,
Owen Strods
Montana Civil Contractors