26-165-B Solicitation Packet 2026-07-01.pdf

REQUEST FOR BID NO. 26-165-B

SPIRAL TYPE CLARIFIER DRIVE

BID SUBMITTALS ARE DUE PRIOR TO:

Thursday, July 30, 2026, at 2:00 PM Central

BID MAY BE SUBMITTED ELECTRONICALLY TO (Registration is free):

ntmwd.bonfirehub.com

DOCUMENTS MAY BE DELIVERED TO:

NORTH TEXAS MUNICIPAL WATER DISTRICT

PROCUREMENT DEPARTMENT

501 E. BROWN STREET

WYLIE, TX 75098

DOCUMENTS MAY BE MAILED TO:

PROCUREMENT DEPARTMENT

PO BOX 2408

WYLIE, TX 75098

NORTH TEXAS MUNICIPAL WATER DISTRICT CONTACT:

Adrienne Conyer aconyer@ntmwd.com

INSTRUCTIONS TO BIDDERS

1. REQUIRED INFORMATION

The North Texas Municipal Water District’s (NTMWD) solicitation packets contain various documents that require completion by the bidder. Said information must be completed and submitted prior to the closing date and time for the submission of bids. Failure to provide required information may result in the rejection of your bid.

2. SUBMISSION OF BIDS

A response to a Request for Bid (RFB) may be submitted to NTMWD by any of the following means:

• Electronically submitted via ntmwd.bonfirehub.com;

• Hand delivered to the North Texas Municipal Water District Administrative Building, 501. E. Brown

Street, Wylie, Texas 75098;

• Mailed to the North Texas Municipal Water District, Procurement Department, at P.O. Box 2408, Wylie, Texas 75098;

• No oral, telegraphic, telephonic, or facsimile submittals will be considered or accepted.

3. OFFICIAL TIME & LATE SUBMITTALS

The time clock at the North Texas Municipal Water District front receptionist area shall be the official time of receipt for all responses to a RFB submitted in hard copy paper form. All submittals received after the submission deadline shall be rejected. Absolutely no late submittals will be considered. Bidder will be notified of the rejected late bid submission and will advise NTMWD as bidder’s desired disposition of the bid submittal by either (1) pick up, (2) return at bidder’s expense, or (3) destroyed with written authorization of the bidder. If bids are sent by USPS to the Administration Building, the bidder shall be responsible for actual delivery of the bid to the Administration Building before the advertised date and hour for opening of bids. If mail is delayed either in the postal service or in the internal mail system of NTMWD beyond the date and hour set for the bid opening, bids thus delayed will not be considered and will be disposed of as authorized.

4. NOTIFICATION

NTMWD uses www.bonfire.com and The Wylie News to disseminate notification of bid opportunities. NTMWD shall not be responsible for receipt of notification and information from any source other than those listed above. It shall be the Bidder’s responsibility to verify the validity of all information received by sources other than those listed.

5. ELECTRONIC SUBMITTALS

NTMWD exclusively uses Bonfire for the electronic notification and dissemination of all bids. The receipt of documents through any other company may result in the receipt of incomplete specifications and/or addenda.

NTMWD accepts no responsibility for the receipt and/or notification of solicitations through any other company.

To streamline the solicitation process, all Bidders are highly encouraged to utilize the Bonfire system. There is no cost to the Bidder to download or respond to NTMWD solicitations on Bonfire. Even though electronic response submission are recommended, Bidders may continue to submit a hard copy, paper bid directly to NTMWD if desired.

6. MODIFICATION AND WITHDRAWAL

Bids may be withdrawn at any time prior to the official opening of the bids. Alterations made by a bidder before opening time must be initialed by bidder guaranteeing authenticity and must be resealed. After the official opening, bids become the property of NTMWD and may not be amended, altered, or withdrawn without the authorization of the Procurement Manager.

7. BID OPENINGS

All submittals will be opened and presented according to the legal requirements for the type of solicitation at the designated time and place specified in the solicitation. However, the reading of a bid at the opening should not be construed as a comment on the responsiveness of such bid or as any indication that NTMWD accepts such bid as responsive. NTMWD will make a determination as to the responsiveness of bids submitted based upon compliance with all applicable laws, NTMWD purchasing guidelines, and project documents, including but not limited to the specifications and required submittal documents. NTMWD will notify the successful bidder upon award of the contract and, according to State law, all bids received will be available for inspection at that time.

8. BID SUBMISSIONS

Due care and diligence has been used in preparation of the information contained in this request for bids, and the information is believed to be substantially correct. However, it is Bidder’s responsibility to determine the full extent http://www.bonfire.com/ of its exposure and to verify all information presented in the request for bids. NTMWD and its representatives are not responsible for any errors or omissions in these specifications. Additionally NTMWD and its representatives are not responsible for Bidder’s failure to determine the full extent of the exposure and risk associated with this request for bids.

This bid is issued in compliance with the NTMWD Purchasing Policy and with authorization from NTMWD’s Board of Directors.

A. Bids will be considered irregular if they show any omissions, alteration of form, additions or conditions not called for, or other irregularities of any kind. However, NTMWD reserves the right to waive any irregularities and to make one or more awards in the best interest of NTMWD.

B. NTMWD reserves the right to accept or reject in part or in whole any bids submitted and to waive any technicalities in the best interest of NTMWD. Bids may be rejected, among other reasons, for any of the following specific reasons:

• Bids containing any irregularities, and

• Unbalanced value of any items.

C. Bidders may be disqualified and their submissions not considered, among other reasons, for any of the following specific reasons:

• If NTMWD believes collusion exists among the bidders;

• Reasonable grounds for believing that any bidder has an interest in more than one bid for the work contemplated;

• The bidder having an interest in any litigation against NTMWD;

• The bidder being in arrears on any existing contract or having defaulted on a previous contract;

• Lack of competency as revealed by a financial statement, experience, equipment, questionnaires, etc.;

and

• Uncompleted work which, in the sole judgment of NTMWD, will prevent or hinder the prompt completion of additional work, if awarded.

D. It is the bidders’ sole responsibility to print and review all pages of the bid document, attachments, questions and their responses, addenda and special notices.

E. When in the best interest of NTMWD, NTMWD reserves the right to request additional information or clarification from bidders to determine bidders’ ability to meet the requirements specified by this bid.

F. On the Bid Pricing Form, in the case of a conflict between the unit price indicated and the extended amount shown, the unit price indicated, multiplied by the stated quantity shall govern.

G. NTMWD reserves the right to reject any of all submissions without cause prior to award, to waive formalities, or to proceed otherwise when in the best interest of the NTMWD.

9. EXAMINATION OF CONTRACT DOCUMENTS AND SITE

A. Bidders must examine the Solicitation, make observations and investigations, correlate knowledge and observations with the requirements of the Solicitation and consider these in preparation of a bid for the project.

B. Bidders must read the Solicitation and related technical data and reports thoroughly. Use a complete set of Solicitation Documents in preparing Bids. Assume responsibility for errors or misinterpretations resulting from the use of partial or incomplete documents.

C. Bidders may visit the sites to become familiar with general, local and site conditions that may affect cost, progress, or performance of the work in any manner.

D. Bidders must become familiar with federal, state and local laws, ordinances, rules, and regulations affecting cost, progress, or performance of the work.

E. Bidders should make additional visits and investigations as necessary to determine the bid price for performance of the work in compliance with the terms of the Solicitation before submitting a bid. Cost associated with these investigations is to be paid by the Bidders.

F. By the submission of a Bid for this project, Bidders acknowledge sole responsibility for job site safety.

G. The submission of a Bid is an incontrovertible representation by the Bidder that Bidder has complied with every requirement of this Section.

10. UNIT OF MEASURE

Responses to the RFB must be submitted in the units of measure specified in the bid pricing form.

11. INTERPRETATIONS

Bidders must submit all questions about the meaning or intent of the Solicitation to NTMWD in writing by the question due date and time. Replies are issued by Addenda to all parties recorded as having received the bidding documents. Only questions answered by formal written Addenda are binding. Oral and other interpretations or clarifications will be without legal effect.

12. ADDENDA

Any interpretations, corrections, or changes to this bid will be made by written addenda. Sole issuing authority of addenda shall be vested in NTMWD’s Procurement Department. Addenda will be issued via ntmwd.bonfirehub.com.

It is the responsibility of the bidder to ensure receipt of all addenda, and acknowledge by signing and including with the bid submittal.

13. CONFIDENTIALITY

A. Any material that is to be considered confidential must be clearly marked as such and shall be treated as confidential to the extent allowable under Chapter 552, Government Code.

B. The Texas Public Information Act gives the public the right to request access to government information, subject to certain narrow exceptions. NTMWD is an entity subject to this Act. Therefore, please be advised that your company's declaration that certain information submitted in response to a bid request is "confidential" will not be treated as such if NTMWD receives a request for a copy of the bid proposal. NTMWD will of course make an effort to inform your company of such a request and to provide you with an opportunity to object to the release of any proprietary information, but NTMWD cannot and will not make an agreement to withhold information from the public contrary to NTMWD’s responsibilities under the Act.

C. To the extent your response is incorporated into the contract, that contract will become an official record available for public inspection.

D. Bids shall be opened so as to avoid disclosure of contents to competing bidders and kept secret during the process of awarding a contract. All bids that have been submitted shall be open for public inspection after the contract is awarded, except for trade secrets and confidential information contained in the submission and identified as such.

14. BID TABULATIONS

As-Read Bid tabulations will be electronically posted to ntmwd.bonfire.com within forty-eight (48) hours after the bid opening.

15. PREPARATION COSTS

NTMWD will not be liable for any costs associated with the preparation, transmittal, or presentation of any bids or materials submitted in response to this bid.

16. TAXES

NTMWD is exempt from Federal Excise and State Sales Taxes. Tax must not be included in the pricing.

17. PRICING

Prices must be firm for a minimum of ninety (90) days from the date of the bid closing. In the case of an annual contract, the prices must remain firm for the period as specified in the solicitation.

18. BIDDER QUALIFICATIONS

A prospective Bidder must meet the following minimum requirements:

• Must have adequate financial resources, or the ability to obtain such resources as required;

• Must be able to comply with the required or proposed delivery/completion schedule;

• Must have a satisfactory record of performance;

• Must have a satisfactory record of integrity and ethics;

• Must be otherwise qualified and eligible to receive an award;

• NTMWD may request representation and other information sufficient to determine the Bidder’s ability to meet these minimum standards listed above.

19. AWARD OF CONTRACT

NTMWD reserves the right to award this contract by one of the following methods. The method selected will be in the best interest of NTMWD, as determined by the Procurement Manager.

• To the lowest responsible Bidder(s), bidding all items and meeting all specifications;

• To one or more Bidders, if deemed in the best interest of NTMWD;

• To the lowest responsible Bidder(s) meeting specifications per line item;

• If specified, to the low Bidder(s) meeting specifications, per category. To qualify for an award of a category, a Bidder must bid all items within that category. If all items of a category are not bid by all Bidders, award shall be made in the best interest of NTMWD;

• To the Bidder(s) who provide the goods or services specified in the solicitation at the best value to

NTMWD.

• NTMWD reserves the right to compare all bids against any State and/or Interlocal contracts in determination of the award of this bid.

SPECIAL CONDITIONS

1. GENERAL INFORMATION

The North Texas Municipal Water District (NTMWD) is soliciting sealed bids for a clarifier center drive unit with torque control including all related equipment, material and appurtenances for the existing clarifier equipment. The drive shall fit the existing clarifier equipment in accordance with the specifications provided herein.

2. DELIVERY SCHEDULE

A. The term of this agreement shall commence on the date of the last signatory and be effective through July 1, 2027.

B. NTMWD reserves the option to temporarily extend the agreement for an additional ninety (90) days from its expiration date for any reason.

3. BID QUESTIONS & CLARIFICATION

All questions regarding this request for bid shall be submitted in writing on ntmwd.bonfirehub.com no later than 2:00 PM Central on Thursday, July 16, 2026. All questions will be addressed in an addendum. Questions received after the deadline may not be answered.

4. BID SUBMITTAL REQUIREMENTS & OPENING

A. If paper bids are submitted, each firm shall submit one (1) original copy of their bid, including all supporting documentation. Paper bids must clearly show Bid No. 26-165-B. If bids are submitted electronically, the Bidder shall make sure all required supporting documentation is uploaded into the Bonfire system. Failure to provide requested information in this request for bid may result in disqualification from consideration. Bids shall be accepted until 2:00 PM Central Time on Thursday, July 30, 2026. No late bids will be accepted.

B. The bid opening will be held on the bid due date and time via TEAMS:

URL: https://teams.microsoft.com/meet/289815544618130?p=unwpfxvWv1RtmkQpJ4 Meeting ID: 289 815 544 618 130 Passcode: Y3dd7fk2 Dial in by phone: 1-929-336-1597 Phone conference ID: 323 755 516#

The following documents must be included with this bid. Failure to supply the required documents may deem you non-responsive:

• Bid Signature Form

• Bid Pricing Form

• References

5. METHOD OF AWARD

NTMWD’s intent is to award to the lowest, responsive, responsible bidder(s) meeting the specifications.

https://ntmwd.bonfirehub.com/contracts/36875/people https://teams.microsoft.com/meet/289815544618130?p=unwpfxvWv1RtmkQpJ4

North Texas Municipal Water District Stewart Creek West WWTP 44 42 23.2-1 Spiral Type Clarifier Drive

SPIRAL TYPE CLARIFIER DRIVE

PART 1 - GENERAL

1.1 SCOPE OF WORK

A. Supply one (1) clarifier center drive unit with torque control including all related equipment, material and appurtenances for the existing clarifier equipment. The drive shall fit the existing clarifier equipment.

B. Provide one (1) day field service to take measurements.

C. Provide one (1) field service during start-up.

1.2 REFERENCES

A. The following is a list of standards which may be referenced in this Section:

1. American Gear Manufacturers Association (AGMA): 908-B89, Geometry Factor for

Determining the Pitting Resistance and Bending Strength of Spur, Helical, and Herringbone Gear Teeth.

2. American Institute of Steel Construction (AISC): Specifications for the Design, Fabrication, and Execution of Structural Steel for Buildings.

3. American National Standards Institute/American Bearing Manufacturers Association (ANSI/ABMA): 9 & 11, Load Ratings and Fatigue Life for Ball Bearings and Roller Bearings.

4. American National Standards Institute/American Gear Manufacturers Association

(ANSI/AGMA):

a. 2000-A88, Gear Classification and Inspection Handbook Tolerances and Measuring

Methods for Unassembled Spur and Helical Gears.

b. 2001-D04, Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth.

c. 2002-B88, Tooth Thickness Specification and Measurement.

d. 2003-B97, Rating the Pitting Resistance and Bending Strength of Generated

Straight Bevel, Zerol Bevel, and Spiral Bevel Gear Teeth.

e. 2004-B89, Gear Materials and Heat Treatment Manual.

f. 2009-A98, Bevel Gear Classification, Tolerances and Measuring Methods.

g. 6001-D97, Design and Selection of Components for Enclosed Gear Drives.

h. 6010-F97, Standard for Spur, Helical, Herringbone and Bevel Enclosed Drives.

i. 6022-C93, Design Manual for Cylindrical Wormgearing.

j. 6034-B92, Practice for Enclosed Cylindrical Wormgear Speed Reducers and

Gearmotors.

k. 9005-D94, Industrial Gear Lubrication.

5. American Society of Mechanical Engineers (ASME): B29.1M, Precision Power Transmission Roller Chains, Attachments, and Sprockets.

6. American Welding Society (AWS):

a. B2.1, Standard for Welding Procedure and Performance Qualification.

b. D1.1, Structural Welding Code – Steel.

c. QC 1, Standard for AWS Certification of Welding Inspectors.

7. ASTM International (ASTM):

a. A36/A36M, Standard Specification for Carbon Structural Steel.

b. A48, Standard Specification for Gray Iron Castings.

c. A123/A123M, Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

d. A148/A148M, Standard Specification for Steel Castings, High Strength, for

Structural Purposes.

SPECIFICATIONS

Stewart Creek West WWTP 44 42 23.2-2 Spiral Type Clarifier Drive

e. 6A167, Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip.

f. A193/A193M, Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service.

g. A276, Standard Specification for Stainless Steel Bars and Shapes.

h. A283/A283M, Standard Specification for Low and Intermediate Tensile Strength

Carbon Steel Plates.

i. A285/A285M, Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength.

j. A325, Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi

Minimum Tensile Strength.

k. A384, Standard Practice for Safeguarding Against Warpage and Distortion during

Hot-Dip Galvanizing of Steel Assemblies.

l. A385, Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip).

m. A536, Standard Specification for Ductile Iron Castings.

n. A666, Standard Specification for Annealed or Cold-Worked Austenitic Stainless

Steel Sheet, Strip, Plate, and Flat Bar.

o. D3034, Standard Specification for Type PSM Poly (Vinyl Chloride) (PVC) Sewer

Pipe and Fittings.

8. National Electrical Manufacturers Association (NEMA): 250, Enclosures for Electrical

Equipment (1,000 Volts Maximum).

a. NEMA MG-1.

1.3 DEFINITIONS

A. Alarm Torque: 90 percent of design running torque.

B. Cutout Torque: 120 percent of design running torque.

C. Design Running Torque:

1. Torque used to select size, strength, and type of materials and components for mechanism and drive system.

2. At which or below will provide continuous 24 hour per day mechanism operation for period of not less than 20 years at design torque condition and rotational speed without damage, permanent deformation or overload.

3. Equal to 50 percent on overload device scale.

D. Slenderness Ratio: Ratio of unbraced length to least radius of gyration.

E. Submerged Metal: Metal below gear head drive and a plane 18 inches above weir elevation indicated.

F. Ultimate Torque: 200 percent of design running torque and below which no portion of mechanism will be damaged if operated for only a short period of time (a few seconds) and equal to 100 percent on overload device scale.

G. Certified Welding Inspector (CWI): As defined in AWS QC 1.

1.4 SUBMITTALS

1. Shop Drawings:

a. Equipment Assembly: Make, model, weight, and horsepower of each.

b. Manufacturer’s Catalog: Product information, descriptive literature, dimensional layouts, specifications, standard and specialized equipment assembly cuts, and identification of materials of construction.

c. Detailed Drawings:

Stewart Creek West WWTP 44 42 23.2-3 Spiral Type Clarifier Drive

1) Mechanical, and Electrical: Show equipment fabrications and interface with other items including dimensions, size, and locations of connections to other work, and weights of associated equipment.

d. Design Details:

1) Running, Alarm, Cutout, and Ultimate Torque ratings of drive unit assembly.

2) Ultimate Torque load capabilities of drive unit assembly, torque cage, and rotating rake arm trusswork.

e. Details of torque sensing and load indication device.

f. Identification of outside utility requirements for each component such as air, water, and power.

g. Power and control wiring diagrams, including terminals and numbers.

h. Functional description of internal and external instrumentation and controls to be supplied including list of parameters monitored, controlled, or alarmed.

i. Painting/Coating System(s): Include manufacturer’s descriptive technical catalogue literature and specifications.

j. Diameter of ball race.

k. Motor nameplate data per NEMA MG-1, motor manufacturer and any appurtenances.

l. Functional and Performance test description and results.

2. Quality Control Submittals:

a. Designer qualifications:

1) Designer: Professional engineer registered in the state of the Project.

2) Must show 10 years of experience with clarifier drive design.

b. Special shipping, storage and protection, and handling instructions.

c. Test procedures.

d. Test results, reports, and certifications.

e. Manufacturer’s Certificate of Proper Installation.

3. Contract Closeout Submittals: Service records for maintenance performed during construction.

1.5 OPERATION AND MAINTENANCE DATA

A. O&M Manuals: Content, form, and schedule

1.6 WARRANTY

A. Provide warranty for a period of 24 months after substantial completion of the equipment by the

Owner and Engineer. The warranty shall stipulate that the equipment furnished is suitable for the purpose intended and free from defects of material and workmanship for the duration of the warranty. In the event the equipment fails to perform as specified, the Manufacturer will promptly repair or replace the defective equipment without additional cost to the Owner.

B. Spare parts identified within this specification shall not be used to address warranty repairs.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Where a manufacturer’s standard equipment name and/or model number is listed, the equipment system shall be provided as modified to conform to the performance, functions, features, and materials of construction as specified herein.

B. Materials, equipment, and accessories specified in this Section shall be products of:

1. Westech Engineering

2. Ovivo

Stewart Creek West WWTP 44 42 23.2-4 Spiral Type Clarifier Drive

3. Walker Process

4. Evoqua

5. DBS Manufacturing

6. Rebuild-It Service Group

2.2 GENERAL REQUIREMENTS

A. The drive mechanism shall be factory assembled and shall consist of a primary gear reduction unit and final reduction unit consisting of a pinion and internal gear enclosed in a turntable base.

B. Design Requirements:

1. Design Running Torque: Drive unit shall be sized such that worm gear (if used), spur gear, and pinion all meet Design Running Torque in accordance with AGMA 2001 and 6034.

Design Running Torque shall be as follows:

a. Design Torque = 30,000 lb-ft

b. Rated torque = 120,000 lb-ft

2. Rotational Speed: Constant tip speed between 7-15 ft/min. Manufacturer to justify recommended design tip speed.

3. Capable of withstanding, without failure or permanent deformation of any part, torque load of at least twice Design Running Torque and loads generated while sweeping in clarifier floor bottom grout.

4. Drive Mechanism: Design to allow removal of internal gears, balls, and strip liners without walkway bridge removal.

5. Base design upon all-welded construction except at locations requiring periodic field adjustment and as specifically approved.

6. At Ultimate Torque load, stresses in members shall not exceed 90 percent of material yield strength.

7. Slenderness Ratio: Maximum of 200 for any compression member and maximum of 300 for any tension member.

2.3 SUPPLEMENTS

A. Supplemental data sheets to this Section for additional equipment system product, component, and accessory information and requirements are available upon request.

2.4 CENTER DRIVE UNIT ASSEMBLY

A. Ultimate Torque Rating: Not less than 200 percent of Design Running Torque.

B. Motor, Primary and Final Speed Reducers: Separately and independently mounted at center gear head drive platform.

C. Speed Reducer Unit (Option A):

1. Cycloidal, helical, or planetary speed reducers directly connected to a motor and keyed to the pinion.

2. Cycloidal drives shall be made of high carbon chromium bearing steel and be fixed to the drive casing.

3. An eccentric bearing on the high-speed shaft shall roll cycloidal discs of the same material around the internal circumference of this main ring gear.

4. The lobes of the cycloid disc shall engage successively with the pins in the fixed ring gear.

5. The movement of the cycloid discs shall be transmitted then by the pins to the low-speed shaft.

6. Speed reducer efficiency shall be a minimum of 90% per reduction stage.

7. Speed reducer helical or planetary gearing shall be manufactured to AGMA standards and shall provide at least 95% power transmission efficiency per stage.

Stewart Creek West WWTP 44 42 23.2-5 Spiral Type Clarifier Drive

8. The speed reducer shall have a minimum service factor of 1.25 based on the output torque rating of the drive.

9. The reducers shall be fitted with radial and thrust bearings of proper size for all mechanism loads and be grease lubricated.

10. As a safety feature, the speed reducer shall be back drivable to release any stored energy as the result of an over torque condition.

D. Low Speed Final Reduction Unit (Option A):

1. The drive unit shall consist of a solid internal main spur gear, bearing turntable, pinion, secondary speed reducer, support base, and drive unit bearing.

a. The drive bearing shall include a forged steel precision gear/bearing set, with fully contoured raceways hardened to a minimum 58-60 RC.

2. Low Speed Gearset:

a. The design running torque rating of the drive gearing shall be based on the smaller of the strength and durability values determined from the above AGMA standard.

b. The drive main gear shall be designed to a minimum AGMA 6 rating when rated in accordance with the latest AGMA standard.

c. All spur gearing shall be designed to the latest AGMA spur gear standard for strength and surface durability, based on a life of 175,000 hours.

d. Main internal gear shall be forged of alloy hardened steel.

e. The pinion shall be heat treated alloy steel.

f. Support base shall be welded steel.

3. Main Bearing:

a. Ball raceway diameter: Per Manufacturer

b. The drive main bearing shall be designed for the total rotating mechanism loads with a minimum L-10 life of 100 years or 876,000 hours.

E. Primary Speed Reducer (Option B):

1. Horizontally mounted cylindrical-worm or helical-worm gear motor type with gears supported by anti-friction bearings. Connected to secondary speed reducer via a chain or direct coupled drive system with drive sprocket directly mounted on its output shaft.

2. AGMA 6034-B92 and AGMA Service Classification II.

3. Service Factor: Minimum 1.4 based upon Design Running Torque.

4. Overhung Load Rating: Exceed chain pull by minimum 1.75, based on Ultimate Torque.

5. Oil Fill, Drain and Level Indicator Devices, and Lubricant: ANSI/AGMA 9005-D94.

F. Chain Drive (Option B):

1. Roller Chain: Standard, ANSI B29.1.

2. Connect drive sprocket on primary speed reducer to driven sprocket on secondary speed reducer input shaft.

3. Steel Sprockets: Minimum of 12 teeth.

4. Chain:

a. Service Factor: Minimum 4.0.

b. Power Transmission Rating: 1.75 based on pull and power required respectively at the Ultimate Torque Rating.

G. Secondary Speed Reducer (Option B):

1. Cylindrical-Worm and Worm-Gear Type:

a. Shafts supported by antifriction bearings and output shaft directly driving pinion gear of low-speed main bearing assembly.

2. Load Capacity and Torque Rating: AGMA 6034-B92.

3. Design: ANSI/AGMA 6022-C93.

4. Output Shaft: One-piece output extending through worm-gear and low speed main gear drive pinion without intermediate couplings.

5. Worm: Steel, heat treated, ANSI/AGMA 2004-B89, ground and polished.

Stewart Creek West WWTP 44 42 23.2-6 Spiral Type Clarifier Drive

6. Worm-Gear: Centrifugally cast, high silicon bronze copper alloy, or ductile iron.

7. Bearings: ABMA L-10, life of 180,000 hours minimum.

8. Oil fill, drain and level indicator devices, and lubricant conforming to ANSI/AGMA 9005-

D94.

9. Enclosure: Cast iron ASTM A48, Class 30 minimum housing, and registered fit mounted to gear head drive platform.

H. Low Speed Final Reduction Unit (Option B):

1. Enclosed turntable, balls in main bearing annular radial thrust raceway type, balls in compression and renewable strip liners, continuous multipoint contact contoured raceway type with hardened surfaces and balls (Precision bearings).

a. Ring Gear: Internal or external toothed, spur pinion gear driven, attached to secondary speed reducer output shaft.

2. Low Speed Gearset:

a. Design and Rated: ANSI/AGMA 2001-D04.

b. Service Factor: Minimum 1.5 based upon Design running Torque. Power Rating:

1) Lower of pitting resistance and bending strength ratings for pinion and gears.

2) Based upon continuous 24 hours per day service at Design Running Torque for 180,000 hours minimum.

c. Spur Pinion Gear:

1) Steel: Heat treated; integral with or keyed to its shaft.

2) Wall Thickness (Above Keyway): Minimum depth of one tooth.

d. Ring Gear:

1) Solid one-piece or split construction of ductile (nodular) iron (ASTM A536), cast steel (ASTM A148), or heat treated alloy steel.

2) Split Gear Construction:

a) Machined, minimum two alignment dowels, joined with Type 316 stain-less steel bolts.

b) Allowable Stresses (Calculated): Reduced to 85 percent joint efficiency for split gear construction.

3) Bolt to center torque cage that support and rotate collection mechanism.

e. Teeth: Full depth, ANSI/AGMA 2001-D04.

3. Main Bearing:

a. Ball Raceway Diameter: Per manufacturer, as appropriate for the design torques and unit size. Low unit ball load and stability without guide shoes or steady bearings.

b. Raceways and Balls: ABMA L-10 life of minimum 180,000 hours when operating continuously at Design Running Torque.

c. Load Carrying Balls:

1) Steel: Chrome alloy, hardened to 60-65 Rockwell ”C.”

2) Diameter: Minimum 1-1/2 inches. If all balls are load-carrying, 1-inch diameter balls will be acceptable.

3) Crushing Strength: Minimum 120,000 pounds.

d. Spacer Balls: 1/16-inch lesser diameter than, and of same material as, load carrying balls.

e. Balls: Field replaceable without access walkway removal.

f. Raceways: Four 1/4-inch thick by 1/2-inch wide, vacuum degassed high carbon steel renewable liner strips force fit into base and ring gear, and specially hardened to 38- 46 Rockwell “C.”

4. Ring Gear, Pinion Gear, and Main Bearing Ball Races:

a. Oil bathed, steel dust shield, and felt seal protected.

b. Oil fill, drain and level indicator devices, and lubricant conforming to ANSI/AGMA

9005-D94.

c. Casing with manual condensate drain.

5. Oil filling and level pipe, drain plug, and sight gauge. Attach pipe to turntable bottom within

Stewart Creek West WWTP 44 42 23.2-7 Spiral Type Clarifier Drive base center for easy access.

I. Mechanism Overload Device:

1. Mechanical or Hydraulic: Actuate integral contacts to indicate impending overload and shutoff drive motor at predetermined load.

2. Impending Overload Contact (Alarm Torque): Actuate at 90 percent of Design Running Torque.

3. Motor Shutdown Contact (Cutout Torque): Actuate at 120 percent of Design Running Torque.

4. Provide shear pin limit switch to protect drive unit in case of control system failure. Pin shall break at 160 percent of Design Running Torque or as recommended by Manufacturer.

5. Contacts: Single-pole, double-throw rated 5 amps, 120V AC.

6. Enclosure: NEMA Type 4X

7. Indicating Pointer: Indicate relative load on graduated scale up to Ultimate Torque.

2.5 ACCESSORIES

A. Lifting Lugs: Provide on equipment assemblies and components weighing over 100 pounds.

B. Anchor Bolts: Provide coated Type 316, stainless steel bolts, sized by equipment manufacturer and at least 1/2 inch in diameter.

C. Equipment Identification Plates: Provide 16-gauge, Type 316 stainless steel, identification plate securely mounted on each separate equipment component and panel in a readily visible location.

Plate shall bear 1/4-inch high engraved block type black enamel filled equipment identification number and letters.

2.6 TOOLS AND SPARE PARTS

A. Tools: The work includes furnishing one complete set of special tools recommended by the manufacturer for maintenance and repair of each separate type of equipment; tools shall be stored in tool boxes, and identified with the equipment number by means of stainless steel or solid plastic name tags attached to the box.

B. Spare Parts:

1. All equipment shall be furnished with the specified manufacturers’ spare parts, as indicated in the individual equipment sections.

2. Spare parts shall be tagged by project equipment number and identified as to part number, equipment manufacturer, and subassembly component (if appropriate). Spare parts subject to deterioration such as ferrous metal items and electrical components shall be properly protected by lubricants or desiccants and encapsulated in hermetically sealed plastic wrapping. Spare parts with individual weights less than 50 pounds and dimensions less than 2 feet wide, or 18 inches high, or 3 feet in length shall be stored in a wooden box with hinged wooden cover and locking clasp. Hinges shall be strap type. The box shall be painted and identified with stenciled lettering stating the name of the equipment, equipment numbers, and the words "spare parts." A neatly typed inventory of spare parts shall be taped to the underside of the cover.

3. At a minimum furnish, tag, and box for shipment and storage the following spare parts and special tools:

Item Quantity

Lubricants As required for 1 year of continuous operation.

2.7 FABRICATION AND FINISHES

Stewart Creek West WWTP 44 42 23.2-8 Spiral Type Clarifier Drive

A. General: Fabricate bridge beam or stringer sections in continuous unbroken pieces.

B. Shop Assembly:

1. Shop fabricate and assemble mechanism components in the largest sections practicable and permitted by transportation carrier regulations.

2. Properly match-mark units for ease of field erection.

3. Completely assemble center drive unit in manufacturer’s shop and test to assure proper operation, and calibration of torque controls.

4. Completely shop assemble and test control panels.

5. Divide large assemblies into flanged sections. Bolt together with Type 316 stainless steel fasteners and provide continuous field seal welds at all connections.

PART 3 - EXECUTION

3.1 ASSEMBLY AND PREPARATION FOR SHIPMENT

A. Each drive unit, including motor, shall be completely factory assembled, aligned, and securely crated for shipment. Accessory equipment which cannot be shipped assembled to the unit, such as shafts, baseplates, impellers, spare parts, and anchorage materials, shall be separately crated, clearly marked as to the contents, and shipped on the same shipment as the drives.

B. For shipment, exposed surfaces subject to rust, such as mounting flange faces, etc., shall be covered with a rust-preventive compound such as Kendall No. 5, or equal.

3.2 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Delivery of Materials: Products shall be delivered in original, unbroken packages, containers, or bundles bearing the name of the manufacturer.

B. Protection of Equipment: Equipment shall be boxed, crated, or otherwise protected from damage and moisture during shipment, handling, and storage. Equipment shall be protected from exposure to corrosive fumes and shall be kept thoroughly dry at all times. Mechanisms, motors, drives, electrical equipment, and other equipment with anti-friction or sleeve bearings shall be stored in weathertight and heated storage facilities prior to installation. For extended storage periods, plastic equipment wrappers shall not be used to prevent accumulation of condensate in gears and bearings.

3.3 INSTALLATION

A. Manufacturer shall coordinate with Owner during all phases of installation to ensure that manufacturer’s representative is present during critical installation operations.

3.4 MANUFACTURERS' SERVICES

A. A manufacturer’s representative for the equipment specified herein shall be present at the job site for the minimum person-days listed for the services hereinunder for each unit provided, travel time excluded:

1. Field measurements

a. 1 person-day for measurements of existing clarifier equipment

2. Installation, Startup, and Testing Services:

a. 1 person-day for installation assistance, inspection, and Certificate of Proper

Installation.

b. Provide Qualifications of Manufacturer's Representative.

Stewart Creek West WWTP 44 42 23.2-9 Spiral Type Clarifier Drive

END OF SECTION

BID PRICING FORM

THIS PAGE LEFT BLANK INTENTIONALLY.

PLEASE FILL OUT THE EXCEL BID PRICING FORM PROVIDED SEPARATELY.

INSURANCE REQUIREMENTS

Contractors doing business with NTMWD shall have, at minimum, the following insurance coverages and limits for the duration of the contract:

1. COMMERCIAL GENERAL LIABILITY – covering bodily injury and property damage (including property of NTMWD, its officers, agents and employees) with minimum limits on a per project basis of One Million Dollars ($1,000,000) occurrence, Two Million Dollars ($2,000,000) aggregate for premises/operations and One Million Dollars ($1,000,000) occurrence, Two Million Dollars ($2,000,000) aggregate for products/completed Operations.

2. AUTOMOBILE LIABILITY - covering all operations of Contractor pursuant to this contract involving the use of motor vehicles, including all owned, non-owned and hired vehicles with minimum limits of not less than Five Hundred Thousand Dollars ($500,000) combined single limit for bodily injury, death and property damage liability.

3. WORKERS’ COMPENSATION – in full accordance with the requirements of the state of Texas and shall include bodily injury, occupational illness or disease coverage with minimum Employer’s Liability limits of not less than Five Hundred Thousand Dollars ($500,000/$500,000/$500,000). These limits do not affect the payment of medical expenses or lost wages to injured employees.

4. Waiver of Subrogation – The Commercial General Liability, Workers Compensation and Auto insurance required pursuant to this Contract shall provide for waivers of all rights of subrogation against NTMWD, its officers, employees, and elected representatives for injuries, including death, property damage, or any other loss to the extent the loss, if any, is covered by the proceeds of insurance.

5. Additional Insured Status – All insurance shall be endorsed to name NTMWD, its officers, and employees as additional insureds as to all applicable coverage except for the Workers Compensation Insurance.

6. Proof of Carriage of Insurance – All certificates of insurance will be required in duplicate and filed with NTMWD.

7. All certificates shall provide North Texas Municipal Water District with an unconditional thirty (30) days’ written notice in case of cancellation or any major change to Contractor’s insurance policies or the contractually required coverages mentioned herein.

8. All copies of the certificates of insurance shall reference the project name and/or bid number for which the insurance is being supplied.

9. The Contractor is responsible for making sure any sub-contractor(s) performing work under this contract have the required insurance coverage(s) and supply NTMWD with the proper documents verifying the coverage.

10. The certificate of insurance shall cite the bid/contract number.

11. The certificate of insurance shall include the following name and address as the Certificate Holder:

501 E. Brown St Wylie, Texas 75098

GENERAL TERMS AND CONDITIONS

By submitting a bid in response to NTMWD’s Request for Bids (the “Solicitation”), the bidder agrees that the Contract shall be governed by the following terms and conditions. Bidder shall be referred to Contractor below. Unless otherwise specified in the Contract, Sections 16, 17, 18, 19, 20, 21, 22, 32 and 33 shall apply only to a Solicitation to purchase Goods, and Sections 23, 24, 25, 26, 27, 28 and 34 shall apply only to a Solicitation to purchase Services to be performed principally on NTMWD’s property.

1. ADDITIONAL TERMS

No additional terms or conditions of Contractor, whether contained within Contractor’s invoice or otherwise, shall be accepted by NTMWD. Exceptions to terms and conditions may deem you non-responsive.

2. CONTRACTOR’S OBLIGATIONS

The Contractor shall fully and timely provide all Deliverables described in the Solicitation and in the Contractor’s Bid in strict accordance with the terms, covenants, and conditions of the Contract and all applicable Federal, State, and local laws, rules, and regulations.

3. EFFECTIVE DATE/TERM

Unless otherwise specified in the Solicitation, this Contract shall be effective as of the date the contract is signed by NTMWD, and shall continue in effect until all obligations are performed in accordance with the Contract.

4. ASSIGNMENT OF CONTRACT

Contractor shall not sell, assign, transfer or convey this Contract in whole or in part without the prior written consent of NTMWD. NTMWD may withhold consent for any reason or no reason at all.

5. INDEPENDENT CONTRACTOR

The Contract shall not be construed as creating an employer/employee relationship, a partnership, or a joint venture.

The Contractor’s services shall be those of an independent contractor. The Contractor agrees and understands that the Contract does not grant any rights or privileges established for employees of NTMWD.

6. SUCCESSORS AND ASSIGNS

Owner and Contractor each binds itself, its partners, successors, assigns, and legal representatives to the other party hereto, its partners, successors, assigns, and legal representatives in respect to all covenants, agreements, and obligations contained in the Contract Documents.

7. SEVERABILITY

Any provision or part of the Contract Documents held to be void or unenforceable under any Law or Regulation shall be deemed stricken, and all remaining provisions shall continue to be valid and binding upon Owner and Contractor, who agree that the Contract Documents shall be reformed to replace such stricken provision or part thereof with a valid and enforceable provision that comes as close as possible to expressing the intent of the stricken provision.

8. VENUE

NTMWD and Contractor agree that the contract shall be governed and construed according to the laws of the State of Texas. NTMWD and Contractor agree that venue shall lie exclusively in the State district courts of Collin County, Texas for any legal action arising of and/or relating to this Agreement.

9. FISCAL YEAR FUNDING

The NTMWD's fiscal year begins October 1 and ends the following September 30th. Budget funds are approved by the NTMWD and NTMWD’s Board on an annual basis. In the event the NTMWD’s Board should fail to fund the Contract for any fiscal year during the Contract term, the Contract shall automatically terminate on the last day of the fiscal year for which funding has been approved. Contractor will be given no less than sixty-(60) days written notice of any such non-approval of Contract funding. Termination under this clause shall be without penalty to the

NTMWD.

10. TAXES

NTMWD is exempt from Federal Excise and State Sales Taxes. Tax exemption certificates will be executed by NTMWD and furnished upon request.

PAYMENT TERMS AND METHOD

Payment terms are Net 30 for invoices submitted to and approved by NTMWD.

NTMWD utilizes a 3rd party payment provider. Vendors will be required to complete a vendor profile upon award notification to, and select your preferred payment method.

11. INVOICES

Invoices shall be fully documented in accordance with the scope of work. Invoice must include the appropriate Purchase Order number and the NTMWD Work Order Number (if applicable). Payment may be delayed on invoices not listing the Purchase Order number. Invoices should also reference department name, job site location, NTMWD employee requesting goods or services, and a complete breakdown of charges.

The breakdown on the invoice should be in accordance with the bid pricing. If applicable, invoices should provide clear detail and breakdown for labor (to include hourly rate and cost per hour), and mark-up on parts/materials should be provided on the invoice and extended (detail to show vendors cost, and then extended to show markup).

Invoices shall be priced per unit prices as awarded unless Contractor invoices at a discounted unit price. If Contractor invoices for less than the contracted unit price, NTMWD has the right to accept invoice and pay the discounted price as full satisfaction of compensation due the Contractor.

Unless otherwise directed, invoices shall be submitted by mail or email to:

Attn: Accounts Payable

P. O. Box 2408 Wylie, Texas 75098

Email: payables@ntmwd.com

12. INTEREST

NTMWD is not obligated to pay interest on moneys not paid except as provided in Section 2252.032 of the Texas Government Code.

13. SPECIFICATIONS/NAME BRAND

Any catalog, brand name, or manufacturer's reference used is considered to be descriptive, not restrictive, and is indicative of the type and quality NTMWD desires to purchase. Bids on brands of like nature and quality may be considered unless specifically excluded. If bidding on other than reference, bid must certify article offered is equivalent to specifications and it is subject to approval by NTMWD.

14. SAMPLES

Samples if required, shall be furnished free of expense to NTMWD and if not used or destroyed in examination and testing, will be returned to the Bidder, if requested, at the Bidder’s expense. Each sample must be marked with the Bidder's name and address and NTMWD RFB number. SAMPLES SHOULD NOT BE ENCLOSED WITH A BID

SUBMITTAL UNLESS REQUESTED.

15. PLACE OF DELIVERY

The place of delivery shall be that set forth in the specifications. The terms of this contract are “no arrival, no sale.”

16. DELIVERY TERMS AND CHARGES

Deliverables shall be shipped F.O.B Destination to the designated NTMWD facilities unless otherwise specified in the Solicitation. Contractor’s price shall include all delivery and packaging costs. NTMWD assumes no liability for goods delivered in damaged or unacceptable condition. The successful bidder shall handle all claims with carriers, and in the case of damaged or missing goods, shall ship replacement goods immediately upon notification by

NTMWD.

17. DELIVERY PROMISE

When delivery delay can be foreseen, the bidder shall give prior written notice to NTMWD, who shall have the right, in its sole discretion, to extend the delivery date if reasons for delay appear acceptable. Default in promised delivery, without acceptable reasons, or failure to meet specifications, authorizes NTMWD to purchase the goods elsewhere, and charge any increase in cost and handling to the defaulting contractor.

file://ntmwd.com/bdcdfs/home/anobles/Projects/For%20Nicole/Bid%20Packets/payables@ntmwd.com

18. PACKAGING

Unless otherwise indicated, items provided by the Contractor will be shipped new, unused, in first class condition and in containers suitable for damage free-shipment and storage.

19. TITLE & RISK OF LOSS

The title and risk of loss of the deliverables shall not pass to NTMWD until NTMWD actually receives and takes possession of the goods at the point(s) of delivery.

20. SAFETY DATA SHEETS

Where required by law, contractor will include Safety Data Sheets (SDS) with delivery for applicable items. Failure to include the SDS for such items will constitute a material breach of contract and may result in refusal to accept delivery.

21. RIGHT OF INSPECTION AND REJECTION

NTMWD shall have the right to inspect goods upon delivery before accepting them, and to reject defective or non-conforming deliverables. Contractor shall be responsible for all charges for the return to of any goods rejected as being nonconforming under the specifications.

22. PLACE AND CONDITION OF WORK

NTMWD shall provide the Contractor access to the sites where the Contractor is to perform the services as required in order for the Contractor to perform the services in a timely and efficient manner, in accordance with and subject to the applicable security laws, rules, and regulations. The Contractor acknowledges that it has satisfied itself as to the nature of NTMWD’s service requirements and specifications, the location and essential characteristics of the work sites, the quality and quantity of materials, equipment, labor and facilities necessary to perform the services, and any other condition or state of fact which could in any way affect performance of the Contractor’s obligations under the contract. The Contractor hereby releases and holds NTMWD harmless from and against any liability or claim for damages of any kind or nature if the actual site or service conditions differ from expected conditions.

23. LIABILITY FOR DAMAGE TO NTMWD PROPERTY

The Contractor shall be…