Change Order - Achen-Gardner

City of Chandler — Regular Meeting (2023-09-21)

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Page 1 
Project Name: Arrowhead WPF Rehab & Pecos SWTP Surge System Construction CO 4 
Project No.: WA1903.401 & WA1908.401 
Rev. 3/20/23 
Amendment authorized by Owner name: Danny Sargent 
Date: 07/17/23 
Original Agreement amount: 
$6,053,000.00 
Previous Change Order total: 
$6,151,000.00 
Last Agreement amount approved by Council: 
$6,053,000.00 
This Change Order: 
$700,000.00 
This Change Order + previous Change Order(s) not approved by 
Council total: 
$798,000.00 
Revised Agreement total: 
$6,851,000.00 
Council Approval Required (yes indicates approval required) 
Yes 
No 
Change Order(s) total over $100,000: 
☒
☐
Change Order(s) total causes Agreement to exceed $100,000: 
☒
☐
Agreement Time 
Agreement time prior to this Change Order (including previous 
change order(s): 
683 
Calendar Days 
Net change resulting from this Change Order: 
0 
Calendar Days 
Revised Agreement time (including this Change Order): 
683 
Calendar Days 
CHANGE ORDER NO. 
4 
DATE August 22, 2023 
Change Order not valid until signed by both the City and the Contractor.  Contractor’s signature indicates 
Agreement herewith, including any adjustments in the Agreement Price or Agreement Time. 
Project Name: 
Arrowhead WPF Rehab & Pecos SWTP Surge System Construction 
Project No.: 
WA1903.401 & WA1908.401 
User Dept.: 
Public Works & Utilities
NTP Date: 11/18/2021 
TO: 
Achen-Gardner Construction, LLC 
2195 W. Chandler Blvd., Ste. 200 Chandler AZ 85224 
(CONTRACTOR) 
(Mailing Address) 
knunez@achen.com 
(Email Address) 
Contractor must make the following changes to this Agreement: (Detail scope change (Exh. A) / cost 
breakdown (Exh. B), if needed) 
The following change order represents funding to remedy unforeseen conditions discovered while rehabilitating 
the Arrowhead Water Production Facility (WPF) and the Pecos Surface Water Treatment Plant (SWTP).  Cost 
increase will also capture project material cost escalations and respective extended general conditions.  
Including, specifically, a 30 LF deep, 24” diameter suction line metal pipe was discovered to be corroded.  The 
suction line rehabilitation completes the entire WPF system.  Final payment for the additional work will be made 
per contract unit rates and using contractor supplied invoicing.  These additional cost items have been reviewed 
by city and consultant staff and found acceptable.

Project Name: Arrowhead WPF Rehab & Pecos SWTP Surge System Construction CO 4 
Page 2 
Project No.: WA1903.401 & WA1908.401 
Rev. 3/20/23 
Council Approval (if applicable) 
Council Approval Date: 
Item No.

THE ABOVE IS AGREED TO BY: 
"CITY" CITY OF CHANDLER 
MAYOR 
RECOMMENDED BY: 
Kimberly Moon, P.E. 
CIP City Engineer 
APPROVED AS TO FORM: 
City Attorney 
ATTEST: 
City Clerk 
C: 
Danny Sargent I Sandra Story 
"CONTRACTOR" 
Achen-Gardner Construction, LLC 
Kevin Nunez 
Print Name 
Vice President 
Title 
knunez@achen.com 
Signer Email Address 
Seal 
Project Name: Arrowhead WPF Rehab & Pecos SWTP Surge System Construction CO 4 
Project No.: WA 1903.401 & WA 1908.401 
Rev. 3/20/23 
8-28-2023
Date 
Page3

Exhibit A 
Item No. 70 
Extended General Conditions 
This bid item is added to compensate the contractor for extended general 
conditions.  The negotiated, reduced additional general conditions are related 
to material availability, causing the project schedule to extend. 
Measurement and payment:  Extended general conditions will be measured as a 
single complete unit of work and paid at the contract lump sum of $400,000.00. 
Item No. 71 
Materials Cost Escalations 
This bid item is added to compensate the contractor for materials cost 
escalations.  This cost represents the shared, equitable adjustment for 
escalations of materials suppliers and subcontractors.  No markup is included 
(related to Contract General Conditions Section 9.5.1). 
Measurement and payment:  Material cost escalations will be measured as a 
single complete unit of work and paid at the contract lump sum of $100,000.00. 
Item No. 72 
Suction Pipe Rehab Work added previously 
This bid item addresses work added previously but separated out into this 
change order.  Allowance usage amount in original contract and change order 
No. 3 are for all other added work or modifications to the original scope.   
Measurement and payment:  Suction Pipe Rehab Work will be measured as a 
single complete unit of work and paid at the contract lump sum of $200,000.00.

Exhibit B 
Unit 
Extended 
No. 
Description 
Quantity 
Price 
Unit 
Price 
Change Order No. 4 
70 
Extended 
General 
Conditions 
1 
$400,000.00 
LS 
$400,000.00 
71 
Material Cost
Escalations 
1 
$100,000.00 
LS 
$100,000.00 
72 
Suction Pipe 
Rehab Work 
added 
previously 
1 
$200,000.00 
LS 
$200,000.00 
Original Construction 
Agreement: 
$6,053,000.00 
Change Order 1 
(time-extension-only): 
$0.00 
Change Order 2 
(time-extension-only): 
$0.00 
Change Order 3: 
$98,000.00 
Change Order 4: 
$700,000.00 
Revised Total: 
$6,851,000.00