6-Add01 448-2023-040460.pdf

SEPTEMBER 2, 2026

CITY OF WICHITA, KANSAS

REQUEST FOR BID NUMBER 260221

ADDENDUM #1

PUBLIC WORKS & UTILITIES/ENGINEERING

ASR Phase 3 Recharge Basins

448-2023-040460

DUE DATE: FRIDAY, SEPTEMBER 4, 2026 AT 10:00 A.M.

The following additions, deletions, and/or changes have been added to the specifications and made a part of this bid 260221.

See Attachment for Addendum #1 items

Each vendor is required to acknowledge receipt of this Addendum by electronic acknowledgement via City’s Procurement Portal (wichita.gov/procurementportal) and to file same with and attached to this bid.

Josh L. Lauber Purchasing Manager

ADDENDUM COVER PAGE

The submitter electronically acknowledges via City’s Procurement Portal (wichita.gov/procurementportal) by completing submission, receipt of this Addendum and the vendor response submitted herewith is in accordance with the information, instruction, and stipulations set forth herein.

https://wichita.gov/procurementportal https://wichita.gov/procurementportal

ADDENDUM NO. 1

TO

PUBLIC WORKS & UTILITIES/ENGINEERING

ASR Phase 3 Recharge Basins

448-2023-040460

RFB No. 260211

(SEPTEMBER 2, 2026)

The following changes and additions shall be made to the plans and proposal.

1. New/Revised Bid Items. The following bid items have been added or revised:

a. Item 21 - Geoweb Slope Protection w/ Grade Beam. Revise quantity to 5959 SY.

b. Item 50 - Geoweb Slope Protection w/ Grade Beam. Revise quantity to 6234 SY.

2. Plan Revisions.

a. REVISE General Note 10 on Plan Sheet No. E-001 to read as follows:

Work involves providing instrumentation, completing PLC panel assembly, and providing all wiring terminations to instrumentation and PLC panel. PLC programming and SCADA integration will be by a SCADA contractor under a separate contract.

b. MODIFY Interior Well Conduit and Cable Schedule on Plan Sheet No. E-602 as follows:

C01 thru C17: Cable type/#/Size/GND requirements will be provided by Contractors as is necessary for approved submittals of each specific device.

c. REVISE Specification 313200, 1.4, paragraph B.1, first sentence to read as follows:

Prior to construction, the contractor shall submit calculations based on site specific conditions for slope and crest anchorage requirements.

d. MODIFY Detail 1 on C-021 shows to indicate geoweb depth of 3".

e. MODIFY Drawing C-020 to indicate reinforcing steel #5 @ 12” O.C, EW with minimum of 2” cover.

f. MODIFY Detail 1 on C-023 to reflect the concrete headwall as shown on attached Exhibit A.

g. DELETE Note 1 on sheet E-101.

h. MODIFY drawing sheet A-102; the roof hatch size shall be 3’-0” x 3’-0”.

i. ADD the Specification shown on Exhibit B to Specification Section

331216 Valves and Appurtenances.

j. REVISE Summary of Demolition Table on Plan Sheet C002 to reflect 3 each REMOVE WELL HEAD AND CASING.

k. REVISE Summary of Demolition Table on Plan Sheet C013 to reflect 2 each REMOVE WELL HEAD AND CASING.

3. Bid Questions. The following questions concerning the project have been asked and a response in red has been included.

Is GC responsible for plan review fees?

Plan review fees associated with the project will be obtained the City, Is GC responsible for building permit fees?

City will obtain building permit and floodplain permit.

Is GC responsible for electrical service fees?

No. Electric service is owned by City of Wichita.

Is GC responsible for gas service fees?

No. There is no gas service required.

Please provide tax status. (New Const./Exempt. ) Exempt.

Is GC responsible for Builder's Risk Insurance?

Required coverages are set forth in Liability Insurance Specifications.

Sheet C002 and C013 Note 2 states to salvage items within the existing wellhouse.

Please identify items to salvage.

Items to be salvaged will be coordinated with Shawn Maloney. Items may include, but are not limited to: Well head piping, flow meter, check valve, butterfly valve, pressure gauge, all of the electrical cabinets/boxes, and radio tower/mast.

Do the existing well house and well need to stay online or can we remove at any time?

Existing wells and well houses may be removed at any time.

Has an asbestos survey been conducted on the existing well buildings scheduled to be demolished? KDHE requires this survey on any building to be demoed, regardless of age or building type.

No, this will be the contractors responsibility.

The specifications state this is a federal aid contract. Please provide the Davis Bacon Wage Rate determination document or reference number.

Davis-Bacon Wage Determinations reference number for Harvey County, KS is KS20260162. A copy is provided as a part of this Addendum.

E-001 General Note 10 states Telemetry and Control Wiring will be by a SCADA contractor under a separate contract. Please confirm SCADA is not to be included in this bid. Also, please clarify any electrical requirements or coordination to SCADA equipment that may be needed in this contract.

Revisions are directed as part of this Addendum.

The specifications state this project is federally funded and bidders should conform to the Buy America Preference for Infrastructure Projects. It is understood that sourcing all iron, aluminum, steel, cement, plastics, PVC pipe, concrete, glass, optical fiber, and lumber is the preference, but please confirm that it is not a contractual requirement for these materials to be sourced in America.

Department of Interior De Minimus Waiver allows for non-America sourced purchases up to 5% of the applicable project costs.

Specification 313200, 1.4, part B requires the soil stabilization supplier to submit calculations and a written evaluation based on each site's specific conditions at time of bid. Contractor requests calculations instead be provided upon engineer requests after a low apparent bidder has been selected.

Specification 313200, 2.1, Part C.d states nominal depth of geoweb cells shall be

3", however Detail 1 on C-021 shows a scaled depth of 4". Please confirm the desired depth for geoweb cells.

Revisions are directed as part of this Addendum.

Specification 313200, 2.1, Part C.d states nominal depth of geoweb cells shall be 3", however Detail 1 on C-021 shows a scaled depth of 4". Please confirm the desired depth for geoweb cells.

The bid form line 21 and line 50 list a quantity of 5,106 and 5,315 SY respectively.

After reviewing detail 1 on C-021, it appears that these measured quantities only include the sloped portion of the geowebing. Per the detail, the geoweb panels extened horizontal 2'-0" at the top of the slope before then turning 45° down towards a deadman and extending another 1'-6". This results in a considerable increase of geoweb SY not currently included in the measured quantities. Please review and revise bid item lines as necessary to reflect accurate quantities.

Please provide reinforcing steel requirements for waste holding tank foundation shown on drawing C-020.

Please provide reinforcing steel requirements for concrete headwall and foundations at recharge outlets. Reference detail 1 on C-023.

Drawing sheet E-101, note 1 refers contractor to the small utility drawings. Small utility drawings to not appear to be included in this plan-set. Please confirm if small utility scope is to be included in contractor's bid and if so, please provide necessary drawings for bid.

Revisions are directed as part of this Addendum.

Drawing sheet S-001, Section V.3 notes a full-seved precase mock-up shall be provided to demonstrate all aesthetic effects and establish quality standards.

Contractor requests the option to provide a smaller mock-up of (2) 20 SQFT panels that would not be incorporated into the final building. Mock-up shall include desired aesthetic effects, plus additional architectural elements can utilize these panels for their specific mock-ups as necessary.

No exceptions taken.

With the desired level of architectural elements included on the finished precast panels, it is often difficult to achieve the same level of finish on the end return of a panel. Contractor requests confirmation that alternative methods can be utilized on the precast concrete panels to ensure a continuous uniform finish is observed even on the end return of a panel. These methods could include a mitered 45° angle at each corner of the building, or prefabricated corner panels could be casted which would add a joint, but ensure a uniform finish.

Alternative panel end-finishing can be acceptable, but the specific method is subject to review and approval. Additional joints are not viewed negatively if required to achieve the documented end-result.

Detail 3 on A-202 notes a fibrous joint filler shall be installed between (2) precast panels and between two continuous runs of backer rod. Please confirm if spray foam could be utilized in lieu of a fibrous joint filler.

Spray-foam is an acceptable alternative to fibrous joint filler but is subject to review and approval similar to that of the fibrous joint filler.

Note A3 on drawing sheet A-102 directs contractor to size roof hatch based on owner provided pump. Please provide cut sheets of selected pump for contractor to verify roof hatch.

Revisions are directed as part of this Addendum.

In reference to detail 1 on A-501, contractor requests the insulation shown on top of the interior footing and between the interior SOG and precast wall be removed. In lieu of insulation, contractor would like to pour interior slab on grade tight to the precast wall and install a thickened edge down to the top of footing. Insulation would still be provided the full height of the footing and below the SOG. Vapor barrier would terminate at interior face of footing, but bond a bond breaker can be applied to the precast and top of footing prior to placement of slab.

No exceptions taken.

Please confirm new wells will be fully developed prior to start of construction.

City may elect to drill new wells off-site to prevent delay of project completion.

Can we get confirmation that the bollards being requested are to be rectangular and not round? Also, what length do these need to be?

Round. See Sheet S 201, Detail 1 for typical pipe bollard detail.

Will this project require utility locates for private and franchise utilities?

Contractor shall be responsible for ensuring any utility services are disconnected prior to construction.

Address possible delay for M09 site (property related) Property Management has closed on the purchase of the M15 site. Property Management is still working on the purchase of the M9 site, which may result in a possible delayed start at this location.

This Addendum is hereby made a part of the solicitation to the same extent as though contained in the original documents and all itemized listings thereof.

Acknowledge receipt of this Addendum electronically via City's Procurement Portal as a part of submission completion.

END OF ADDENDUM #1

Exhibit B

Add the below specifications to Specification Section 331216: VALVES AND

APPURTENANCES

ADD the following to PART 1 – GENERAL, Paragraph 1.1.A. Section Includes:

8. Flow Control Valves

9. Ball Valves

ADD the following to PART 2 - PRODUCTS:

2.9 Flow Control Valves

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Singer S106 Flow Control and Metering Valve

2. Approved equal meeting all requirements of this Section.

B. Valve Requirements:

1. Flow Control and Metering Valves shall be Full Port, Dual Solenoid Control Valves.

2. Ends shall be flanged and shall be suitable for installation between ANSI Class 125 or class 150 flanges.

3. Valve body shall be ductile iron.

4. Valve seat and stem shall be 316 stainless steel.

5. Elastomers for resilient disc and diaphragm shall be EPDM.

6. Provide rigid copper tubing, brass B16 fittings, and brass B16 pilot system materials.

7. Include opening and closing speed controls, pilot ball valves and pilot strainer.

8. Pilot system shall be equipped with bypass valves so that the main valve can be opened or closed without electricity.

9. Valve shall fail closed upon power failure.

10. Valves shall be coated with NSF 61 approved fusion bonded epoxy.

11. Valve will be operated so that the process variable signal (flow) follows the SCADA set-point command signal.

12. Operators: provide SCP-TP Control Panel

2.10 Ball Valves

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Apollo

2. Watts

3. Merit

B. Valve Requirements:

1. Ball Valves shall be Full Port, Stainless Steel, Quarter-turn valves.

2. Ends shall be threaded unless otherwise shown on the drawings.

3. Valve materials shall be 304 or 316 stainless steel.

4. Valve bodies shall be of 2 piece or 3 piece design.

5. Packing and seals shall be PTFE.

6. Locking handle actuators shall be provided.