HomeMy WebLinkAbout21-77 Second Amendment Engineering Services Agreement McGrane Water Engineering LLC 06-23-2021RESOLUTION IN 21-77
A RESOLUTION OF THE BOARD OF TRUSTEES OF THE TOWN OF
FIRESTONE, COLORADO, APPROVING THE SECOND AMENDMENT TO THE
ENGINEERING SERVICES AGREEMENT BETWEEN THE TOWN OF
FIRESTONE AND McGRANE WATER ENGINEERING, LLC.
WHEREAS, on January 8, 2020, the Town of Firestone ("Town") entered into an
Engineering Services Agreement with McGrane Water Engineering, LLC, ("Consultant") for the
Gould Horizontal Well Project's ("Project") final design and construction engineering duties
("Original Agreement"), and
WHEREAS, during the Project's final design phase, Consultant discovered an
unanticipated change in the physical characteristics of the Gould property's alluvium; and
WHEREAS, the change in physical characteristics of the alluvium created an opportunity
to develop a more efficient groundwater delivery system which resulted in the parties entering into
the First Amendment of the Agreement on August 12, 2020 which, in part provided for three new
vertical wells, reduced the size of the planned horizontal well, and eliminated the need for the
planned second phase of horizontal well construction; and
WHEREAS, during construction an opportunity arose to expand the physical capacity of
the Project's recharge trench and to modify the horizontal well installation technique that will
enhance the function of the well; and
WHEREAS, because the expansion of the Project's recharge trench and modification of
the horizontal well installation technique are beyond the Project's scope and budget but will benefit
the Town the parties desire to amend the Original Agreement to provide for the additional
modifications.
NOW, THEREFORE, BE IT RESOLVED BY THE BOARD OF TRUSTEES OF THE
TOWN OF FIRESTONE, COLORADO:
The Second Amendment to the Agreement between the Town of Firestone and McGrane
Water Engineering, LLC, for Engineering Services, is approved in substantially the same form as
the copy attached hereto and made a part of this resolution and the Mayor is authorized to
execute the First Amendment on behalf of the Town.
INTRODUCED, READ AND ADOPTED this3rd of , 2021.
ATTEST:
OF FIRESTONE, COLORADO
Mayor
TO
William P. Hayashi, Tow�`'Attorney
SECOND AMENDMENT TO AN AGREEMENT BY AND BETWEEN THE TOWN OF
FIRESTONE AND McGRANE WATER ENGINEERING, LLC
FOR ENGINEERING SERVICES
THIS SECOND AMENDMENT TO ENGINEERING SERVICES AGREEMENT is
made and entered into effective as of theala day of��hG 2021, by and between the
TOWN OF FIRESTONE, a Colorado municipal corporation, hereinafter referred to as the
"Town", and McGrane Water Engineering, LLC, a Colorado limited liability company,
hereinafter referred to as the "Consultant" with reference to that certain Engineering Services
Agreement between the Town and Consultant approved with Resolution 20-05 and executed by
the Town on January 8, 2020, with First Amendment approved with Resolution 20-78 and
executed by the Town on August 12, 2020, hereinafter referred to as the "Original Agreement."
WHEREAS, during the course of bidding and constructing the Horizontal Alluvial Well
several issues arose that were not anticipated, and;
WHEREAS, the initial attempt to bid the construction of the Horizontal Well did not
yield any responsive bids and required a modification to the bidding documents and second
bidding process, and;
WHEREAS, during the course of construction an opportunity arose to expand the
physical capacity of the projects recharge trench and to modify the horizontal well installation
technique that will enhance the function of the well, and;
WHEREAS, because the additional effort of bidding and adaptive design/management
of the horizontal well construction are beyond the scope and budget prepared by Consultant but
will benefit the project, the Town desires to have these additional services provided, the Parties
believe it to be in the best interest to further amend the Original Agreement as set forth herein.
NOW, THEREFORE, for good and valuable consideration, the Parties agree as follows:
1. Section 2.1 of the Original Agreement is hereby amended to increase the not -to -
exceed compensation amount to a new total of $714,000.00.
2. Exhibit A of the Original Agreement is hereby further amended to include the
attached Exhibit A2 -Additional Scope of Services, that details the additional adaptive design
and construction phase services to be provided.
3. The Original Agreement, as herein further amended by this Second Amendment,
is hereby ratified and confirmed and remains in full force and effect in accordance with its terms.
1
IN WITNESS WHEREOF, the Parties have executed this Second Amendment to
Engineering Services Agreement effective as of the day and year first above set forth.
TOWN OF FIRESTONE,
a ColoradaMunici 1 Corporation
�I I
By:
Bobbi Sindelar, Mayor
Approved
Y
CONSULTANT:
McGRANE WATER ENGINEERING, LLC
a Colorado limited liability company,
as��i �y�.a M oercn rxcorc, v�
Dennis McGrane,
Bmw. y; P.E., C.P.G.
Print Name: Dennis McGrane
Title: President - MWE
2
Attest:
Print Name:
Title:
Exhibit A2 — Additional Scope of Services
[See Following 7 Pages]
3
McGrane Water Engineering, llc
1669 Apple Valley Rd. ,Lyons, CO 80540 •Office: (303)823-5933, Cell: (303) 917-1247
4-Mail: dennis a,mcgranewater.com. Website: NNN«v.mcgranewaterengineerinQ.com
May 28, 2021
Mr. David Lindsay, President
Colorado Civil Group
5110 Granite St. Suite 200
Loveland, CO 80538
Via email at: dlindsayna.ccginc.com
RE: Contract Amendment No. 2 Request —Engineering for Town of Firestone Well Field at the
Gould Site
Dear Mr. Lindsay:
McGrane Water Engineering, LLC (MWE) is providing this Contract Amendment No. 2 request (CA-
2) for engineering services for the Gould Well field for the Town of Firestone. The original
engineering budget was $547,000. CA-1 (July, 2020) increased the engineering budget by $92,000,
to $639,000. We request an additional $75,000 to cover unexpected and additional costs described
below.
ADAPTIVE DESIGN
The water treatment plan (WTP) was designed to be expanded in a second phase. Therefore, the
Gould wellfield is also being designed to allow future expansion. Therefore, we want to design
the horizontal well, pump station and pipelines to handle both Phase I and Phase II production
based on how much water it actually produces which varies seasonally, especially if Managed
Aquifer Recharge (MAR) is used to refill the aquifer using senior water rights or available water
during "free river" conditions as we did this spring. In other words, by making modest
"adaptable" design changes during construction based on new information, such as after testing,
we are able to upgrade the site later for a significantly reduced cost. So far, this design
philosophy has allowed us to make significant modifications to the well field as additional
information becomes available. For example, under CA4 we reduced the 500-ft long horizontal
well to 220 ft after locating a deeper channel to the south where less expensive vertical wells
were more cost-effective. This approach is especially important considering this is a unique
design based on a proposal provided in December 2019.
Contract Amendment No. 1
In June 2020, CA No. 1 reduced the scope of the following tasks:
• Reduced the length of the H-well from 500-ft to about 220-ft; and
• Reduced the scope of project dewatering.
OWE Change Order Request
May 28, 2021
CA No. 1 added:
Page 2
• Geotechnical drilling to evaluate the paleochat el discovered on the south side of the Gould
site;
• Design and drilling of three vertical wells (V-wells) and three well pumping systems;
• Reconditioning existing single phase transformers for the V-well pumps;
• Additional modeling various production scenarios using the V-wells and H-wells to provide
insight into extending the H-well; optimizing Managed Aquifer Recharge (MAR); and
maximizing seasonal peak and baseline production; and
• Preparing a second bid package for the pipeline, pump stations, and meter vaults for the V-
wells.
CA-1 increased the engineering budget by $92,000, to $639,000.
CONTRACT AMENDMENT 2 REQUEST
CA-2 is necessary to accommodate unforeseen work and conducting a "high flow test" that will allow
us to better forecast future production even with a fluctuating water table by better refining additional
storage necessary by recharging senior water rights or using free river. This will be determined by
computer modeling and will also result in a better pump station design to accommodate future
expansion.
Unforeseen Work
Unforeseen work includes: the second round of formal bidding for the construction; a 6-month
construction delay; an extensive unbudgeted submittal review process; and hiring additional
engineering supervision (Daria rago) to assist Kevin O'Connell (Acuity) with the bid preparation,
submittal review and preparing contractor change orders (3 so far). The details of these additional
tasks and costs are included in our March 2021 invoice. However, to simplify your review, we
provided a brief summary below.
Second Bid and Construction Delay
We originally planned to bid the job in June 2020 by hand-picking four potential contractors whom we
had experience with deep excavation and who expressed interest in the project. However, only two
contractors bid, and the low bidder could not get bonded. We therefore cancelled the bid, then
advertised and rebid the job in August 2020. We also offered an option to extend the completion date
until May, 2021. The selected contractor, Walsh Construction, took advantage of the option which
created a 6-month delay when additional project management, submittal review and minor construction
drawing revisions, thus incurring additional cost.
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
MWE Change Order Request
May 28, 2021
Page 3
Submittal Review
We mistakenly did not adequately budget to review the bidder's submittals for the project. This process
turned out to be rather extensive with many questions and information exchanges during the six months
between contracting and construction.
Additional En ine�erin� Supervision
In December 2019, our civil engineering team leader, Kevin O'Connell (Acuity, LLC), fell and was
hospitalized with a head injury. To assist Kevin, MWE retained Daria Drago, P.E. to manage the civil
engineering team. Daria has been instrumental in communicating with Kevin over the past year and
facilitating the submittal review and preparing change orders.
We estimate the total cost for these four unforeseen activities is $40,000 which will be added to Task
4.8 (Project Management) of our scope of work provided below. Our original $10,000 PM budget
was clearly inadequate for what has become a 2-year project involving 7 engineering subcontractors.
Additional Work
Additional work includes conducting a "high flow" test, and additional monitoring and modeling of site
dewatering which we are now calling the "low flow" test.
High Flow Test
A year ago, we envisioned conducting a high flow test, to be performed sometime after the construction
project was completed, to confirm that the H-well could reliably produce higher peak demands with
recharge (e.g., 500 gpm for Phase I and 1000 gpm for Phase II) and determine its physical maximum,
information that will be used in optimizing site yield and site operations. Optimizing the Gould site is
beneficial because: i) the town already owns the parcel; ii) it has ample space, and iii) the parcel already
has surface water rights and water delivery infrastructure. It would therefore be most cost effective to
identify and confirm maximum site usage options before developing the next wellfield site.
The high -flow test was originally envisioned to occur after construction and after the low -flow test,
but we identified the opportunity to include the low -flow test within the already in -progress
construction dewatering and shift that planned testing effort instead to the high -flow test. This
effectively allowed the high flow test to be conducted by the contractor under the low flow test budget
and the low flow test to be conducted under their dewatering budget. We therefore decided to conduct
the high flow testing now to take advantage of Walsh having approximately $50,000 in available
budget, and before designing the pump station to confidently size the Phase I pumps and perhaps upsize
the pump house piping and pipelines to meet Phase II demands. As part of the high -flow testing needs,
the Town granted Walsh Construction a change order to extend the existing recharge trench
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
MWE Change Order Request Page 4
May 28, 2021
approximately 250 ft which allows the Town to recharge over 1000 gpm (currently in progress). This
is especially valuable during "free river" (ongoing) when the Town can divert "free" water.
After the high flow test, we will then be able to more confidently model Phase I and Phase II production
scenarios of the both the 3 V-Wells and the H-well at the site. We will include the results of the testing
and modeling forecasts in our final report. We estimate the cost of the high flow test will be $15,000
which will be added as Task 4.9 to our revised scope of work below.
Water Level Monitoring and Modelin B�aseflow Seasonalitx
In Spring 2021, we decided that monitoring construction dewatering would provide adequate low.
low data to confirm Phase I "baseflow" forecasts. We did not however include an extra monitoring
task in our proposal because I thought that was being done through Miller Groundwater Engineering.
Once we realized how important collecting and analyzing the dewatering data was, I directed MGE
to equip nearby monitoring wells with additional data loggers, download them three times and update
the model. During this effort, we identified that there is a distinct seasonality to base flow
conditions due to a 1 to 2 foot fluctuation in the water table in the summer. A 2 foot fluctuation in a
thin aquifer will cause a proportional change in wellfield production. We plan to evaluate this
seasonal variability and incorporate it into our future production scenarios. We estimate the cost of
the monitoring and high flow test will be $20,000 which will be added as Task 5.0 to our revised
scope of work below.
The total CA-2 request is $75,000. This would increase the engineering budget to $742,000. Table 1
shows the revised scope of work. Highlighted items in green were included in CA No. 1. Requested
additional tasks for CA No. 2 are highlighted orange.
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
MWE Change Order Request
May 28, 2021
Page D
Table 1- Engineering Budget Summary and Contract Amendment No. 2 Request (5/20/2021)
Task
Task Description
Green ighlighted are Contract Amendment 1 Activities
Engineering Team (1)
Budgeted
Completed
Bugeted
Work
Remaining
Budgeted Work
Contract
Amendment No.
2 Request
1.0 - Planning
1.1
JPreliminary Design (complete)
$20 000
$20
000
$0
1.2
lContracting
$3 000
$3 000
$0
Task 1 Subtotal
$23,000
$23,000
$0
$0
2.0 - Research, Modeling and Geotech
2.1
Research Design Options
$23,000
$232000
$0
-
2.2
Computer Modeling Scenarios
$29,000
$29,000
$0
2.3
Evaluate DewatermgOptions
$123000
$12,000
$0
2.4
Geotech Drilling and Surveying
$67,000
$672000
$0
Task 2 Subtotal
$131,000
$131,000
$0
$0
3.0 - Deshin
3.1
Final Horizontal Well Design
KOM
$92000
$0
-
3.2
CDPHE System Design Review
$13,000
$13,000
$0
3.3
Design Pump Vault
$592000
$592000
$0
3A
Design Pump Station and Pipeline
$291000
-
$29,000
-
3.5
Electrical Eng and United Power
$16,000
-
$1600
-
3.6
Prepare Contractor Bid Package
$342000
$347000
$0
3.7
Project Management Activities
$21,000
$21 NO
$0
3.8
3 Wells - Design, Bid and Modeling
$151000
$15,000
$0
3.9
3 Pumps - Design and Bid
$15,000
$15,000
$0
3.10
Evaluate Modeling Operation Scenarios for H-well Pump
,Design
$15,000
$152000
$0
3.11
JAdditional Spec for Pump Station and Pipeline
$401000
-
$40,000
Task 3 Subtotal
$2669000
$181,000
$85,000
$0
4.0 - Construction and Testing
4.1
Contracting and MobilQation
$300
$31000
$0
4.1 a
3 Well Engineer Observation and Construction
$15,000
$157000
$0
4.1 b
3 Pump Engineer Observation and Construction
$51000
$500
$0
4.2
Construction Dewatering
$20 000
$20 000
$0
4.3
H-well and Vault Cons. Admen.
$98,000
$982000
$0
-
4.4
Low Flow Test (Formerly "recovery and recharge test")
$292000
$29,000
$0
-
4.5
Final Pump Design
$131000
$131000
-
4.6
Pipeline Construction
$91000
$91000
-
4.6a
Additional Pipeline for Wells to WTP
$0
-
4.6b 13
Well meter pits
$15,000
$152000
-
4.7
Pump House Construction
$51000
$500
-
4.8
Project Management Activities
$102000
$1U00
$0
$40,000
4.9
High Flow Test
$15,000
5.0
Monitoring and Modeling Baseflow Seasonality
$20,000
4 Subtotal
$222 000
$180
000
1
$42
000
1 $75 000
Task
5.0 - Pump Installation and Start-up Report
5.1 JPUn1P
Installation and Startup
$5 000
$5 000
5.2 1
Testing Report and O&M Manual
$20,000
$20,000
Task 5 Subtotal
$25,000
$0
$25,000
Total
$667,000
$515,000
$152,000
$75,000
Contract Amendment No. 2:
$7S,000
Revised Engineering Budget
$742,000
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
AWE Change Order Request
May 28, 2021
Table 2 shows the total project summary. The total project budget is $2,254,000. So far,
$1,757,539 has been spent on (i) the 3 vertical wells and pumps(ii) the horizontal well with change
orders, and (iii) allotted to engineering (including this contract amendment) to complete the project.
This leaves $498,461 to complete the pump station and pipelines. Therefore, the remaining
contingency for that planned construction this fall is $104,461 which equatescontingency.
Table 2 - Total Project Budget Summary (5/20/21)
Construction and Engineering Budget = $1,752,000
Project Contingency = $5025000
Total Project Budget = $2,2541000
Budget Spent:
Three Vertical Wells
476,091.00
Vertical Well Pumps and Power
-$101,804.00
Horizontal Well (Walsh Construction) _
47862311
Excel Energy (North Transformer) _
4321715
Walsh Change Orders 1 - 3
-$16,618.05
Engineering (MWE) with Contract Amendment No. 2 =
47421000
Total Budget Spent or Allocated = 41,7551539
Remaining Budget for Pump House and Pipelines =
$498,461
Budgeted Amount for Pump House and Pi eUne and 3 Meter Vauhs =
43955000
Remaining Contingency =
$103,461
Remaining Contingency (%) =
26%
Schedule
The estimated completion date is still specified in our contract as March 2021, so a formal project
extension should be included with this change order. An updated Gant chart is attached.
If you have any questions, please give me a call.
Sincerely,
MCGRANE WATER ENGINEERING, LLC.
Dennis McGrane, P.E., C.P.G.
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
vi WE Change Order Request
May 28, 2021
Appendix C —Gantt Chart
IIIIII��IIYY
III
................
McGrane Water Engineering, LLC
1669 Apple Valley Rd. •Lyons, CO 80540 •Phone: (303) 917-1247
E-Mail: dennis@mcgranewater.com Web: ttp://www.mcgranewaterengineering.com
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