Project Information

Bid Title

26-U-004 Section 10 WRP Clarifier 3 and RAS/WAS Pump Station Improvements Addendum 3

Issuing Agency

Bullhead City

Location

Arizona

Published Date

Jan 28, 2026

Closing Date

Feb 4, 2026

Government Level

State & Local

Status

Closed

Ref. #

Starting : 12/10/2025 8:00 AM

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Bid Documents

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Project Description

26-U-004 Section 10 WRP Clarifier 3 and RAS/WAS Pump Station Improvements

Starting: 12/10/2025 8:00 AM

REVISED Due Date: 02/04/2026 3:00 PM

Department: Bullhead City Utilities

Pre-Bid Conference (Attendance is NOT mandatory): 12/18/2025 10:00 AM 901 Richardo Avenue, Bullhead City, AZ

Attachments:

IFB.Sec10clarifier3.Volume1.120225

Volume 2 Clarifier 3 And RAS WAS Pump Station Improvements

Volume 3 Clarifier 3 And RAS WAS Pump Station Improvements Rev

Adden1.Sec10clarifier3.010226

Adden2.Sec10clarifier3.012026

Adden3.Sec10clarifier3.012826

Project Description Excavation and construction of a third clarifier and associated yard piping, addition of a new RAS/WAS pump, and replacement of two existing RAS/WAS pumps. Construction of new clarifier splitter box and demolition of existing splitter box. Upsizing of existing secondary effluent (SE) piping and addition of SE manhole (Additive Alternate No.1). Support the rehabilitation of two existing clarifiers by cleaning the existing tanks, concrete repair as identified during cleaning, and coating of the concrete in the existing tanks. Work will include, but not be limited to, excavation, concrete work, site grading and SCADA upgrades with programming performed by Owner’s SCADA programmer.

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CITY OF BULLHEAD CITY, ARIZONA

UTILITIES DEPARTMENT

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION

IMPROVEMENTS

PROJECT NO. 26-U-004

ADDENDUM NO. 3

January 28, 2026

26-U-004

Addendum No. 3

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION IMPROVEMENTS

January 28, 2026

Page 2 of 9

26-U-004

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION IMPROVEMENTS

Addendum No. 3

The attention of the bidders is called to the following changes and clarifications to the original

contract specifications and they shall be taken into account in preparing proposals and shall be

part of the Bid/Contract Documents.

The following changes and clarifications are to be made and become part of the Bid/Contract

Documents. The changes and clarifications are as follows:

This Addendum includes a Revised Bid Schedule.

Questions received:

ADMINISTRATIVE:

1. Please confirm that no domestic material requirements are associated with this project

(AIS, BABAA, etc.).

Response: The City is considering obtaining a Water Infrastructure Finance

Authority (WIFA) loan for the project. If the City obtains that loan, then American

Iron and Steel (AIS), federal Davis Bacon wage rates, and certified payrolls would

be required. In the enclosed revised bid schedule, a deductive line item has been

included; if the City does not obtain the WIFA loan, then these items would not be

required. The Contractor should include the amount that would be deducted from

the contract for not having to meet these specific WIFA requirements. See revised

Article 3 – Bid Schedule enclosed with this addendum.

2. Please confirm that no required wage rates or certified payroll are associated with this

project.

Response: See previous response for clarification.

3. Is an additional site walk possible? If so, we would like to schedule a site visit.

Response: An additional site walk has been scheduled per Addendum No. 2.

However, the time has passed for questions and no questions will be answered at

the site walk.

SCHEDULE

4. If this project has to be broken into 26' and 27' fiscal years, is there a way to show the

phasing on the drawings between what is needed to be completed by this fiscal year and

next?

Response: A Notice to Proceed is anticipated to occur around February 18, 2026.

26-U-004

Addendum No. 3

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION IMPROVEMENTS

January 28, 2026

Page 3 of 9

The Contractor shall, at a minimum, install the Owner-supplied clarifier equipment

for Clarifier #1 and Clarifier #2 by June 30, 2026. The new clarifier (Clarifier #3),

RAS/WAS piping, pump, and building improvements must be completed no later

than May 1, 2027. Work completed after May 1, 2027, will be assessed liquidated

damages per the amount listed in the bid documents.

5. The bid form states 180 calendar days from NTP, we do not feel that is enough time for

our scope of work along with the fact that another project is being constructed in close

proximity to our work. Is the City open to letting the bidders tell them how long the

construction duration will take on the bid form?

Response: See previous response.

6. Based on current market conditions, 180 days may be insufficient to complete this

project. Is there a possibility an alternate completion schedule may be considered?

Response: See previous response.

BID FORM

7. Taking a look at the Bid schedule there are 20 items total which is great, however we are

seeing only one bid item for an alternate (Additive Alternate No. 1) but on the plans we

are seeing a second alternate on the plans - sheet C-3 (Additive Alternate 2) by clarifier

3. Should we add an additional bit item for this alternate? Please let us know how you’d

like us to proceed with this. (C-3, 40 05 10)

Response: See Revised Bid Schedule included with this addendum.

8. Specification section 01 11 00 states "Installation of a mixer in either a new manhole or

the clarifier splitter box." The drawings show a mixer installed as a bid alternate in the SE

Manhole. Is the splitter box mixer a bid alternate as well?

Response: The installation of the mixer in the splitter box is considered part of the

base bid and should be included in Bid Item No. 16. For Additive Alternative No. 1,

the Contractor should include any additional cost for the installation of the mixer in

the new manhole at this alternate location.

9. Drawing C-3: There is 24" SE pipe for Additive Alternate #2, but there's no Additive

Alternate #2 in the bid schedule. Is this going to be part of this project? If so, where do we

include the cost?

Response: See Revised Bid Schedule included with this addendum.

OWNER SUPPLIED EQUIPMENT

10. Do clarifiers 1 & 2 have existing concrete coating?

26-U-004

Addendum No. 3

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION IMPROVEMENTS

January 28, 2026

Page 4 of 9

Response: No, the Contractor should plan to install a new coating, as specified

and shown on the Drawings, on the inside of each clarifier as part of this project.

See Drawing M-8, Detail 1 and Section 09 90 00, System No. 17.

11. Are clarifiers 1 and 2 able to be drained fully using existing piping without the need for

additional pumping?

Response: Additional bypass pumping will be required by the contractor. Bypass

can occur from the clarifier splitter box to the influent pump station while each

clarifier is taken down for service. This pumping can last a maximum of 14 days

per clarifier before the clarifier must be returned to service. The City did an

emergency repair to a clarifier in 2025 and found that a bypass pumping rate of

1200 gpm during the peak hour was sufficient to maintain the plant flows.

Coordination with the plant operators will be required to manage plant flows

during this time. The operators will also explore lowering the MLSS concentration

prior to the start of bypass pumping to help manage loading to the single clarifier

during this period.

12. Will the clarifying equipment come pre-coated from the manufacturer? Please provide us

with a copy of the Purchase Order for the clarifying equipment so we can verify finishes

and equipment.

Response: Purchase orders for the three clarifiers are provided, and each

purchase order lists the responsibilities of the owner and WesTech. The contractor

will support the owner on the items listed as the owner’s responsibility.

13. Are the pumps in the RAS/WAS building going to be provided? I know internal parts of the

clarifier will be provided. I’m just seeing asterisks that aren’t super clear on the plans and

the spec sheet.

Response: RAS/WAS pumps are to be provided by the contractor.

14. Can you please confirm if the V-Notch Weir is included in the provided clarifier

equipment? In the spec it looks like it will be included but the plans do not indicate that it

will be. Please confirm (M-8, 46 05 50)

Response: WesTech supplies the V-notch weirs for all clarifiers. See the purchase

orders provided.

15. Please confirm the scope of work items below.

 We are furnishing and installing the new prestressed clarifier structure under this

contract?

Response: Yes

26-U-004

Addendum No. 3

SECTION 10 WRP

CLARIFIER 3 AND RAS/WAS PUMP STATION IMPROVEMENTS

January 28, 2026

Page 5 of 9

 We are not furnishing the clarifier mechanism and any items marked with (**) but we

are installing them?

Response: This is true for the clarifier mechanisms and equipment identified in

Specification 46 05 50. All three proposals for the clarifier equipment are

included with this addendum. However, pumps in the RAS/WAS room are to be

supplied and installed by the Contractor.

 We are furnishing or installing all items marked with (*)?

Response: This is true for the prestressed clarifier. The single asterisk note on

Sheet E-2 is in error and should be removed.

16. Section 43 05 50 and March 28, 2025 WesTech Proposal for Clarifier No. 3:

a. Please confirm the radius to the flat region of the center for the sludge withdrawal

ring of 9’-0” or 18’-0” diameter (20% of tank diameter per WesTech Proposal for

Clarifier No. 3).

Response: The radius is 18 feet as per WesTech and M-8. (Please note that the

11 x 17 drawings will print at half scale.)

b. Please confirm the weights provided in the WesTech Proposal are appropriate

for the center pier design. Please provide summary of loads to center of pier and

to the tank wall.

Response: The weights are entirely in WesTech’s control and must be

coordinated with WesTech during the submittal process. Contractor may

contact WesTech to obtain this information anytime.

c. Please provide the radius, quantity, embedment depth, and diameter of center

column bolts into the center pier.

Response: This information will be provided as part of the submittal process.

Contractor may contact WesTech to obtain this information anytime.

d. Please provide necessary embedment depths for all other anchorage of items to

the tank, including but not limited to the scum box, scum box supports, weir,

baffles, walkway, etc.

Response: This information will be provided as part of the submittal process.

Contractor may contact WesTech to obtain this information anytime.

e. The AWWA D110 Type III tank utilizes a waterstop at the floor-wall connection

embedded in a 12” tall curb with an internal diameter of 88’-10”. Please confirm

there are no issues with the rake mechanism to accommodate this.

Commodity Codes

• NAICS 237110Water and Sewer Line and Related Structures Construction
• NAICS 237990Other Heavy and Civil Engineering Construction

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