Tab_13_Amendment_2_Attachment_3_Q_and_A.pdf

1. QUESTION: In reviewing the Steel Tanks Spec and Drawings Part 1: I did not find in the spec as to what size capacity/dimensions the two Regulating Tanks are?

ANSWER: The dimensions of the tanks are shown on drawings 1695-D-60069 (Sheet 64) and 1695-D-60072 (Sheet 67) of the Drawings Part 3 file.

2. QUESTION: In reviewing the Steel Tanks Spec and Drawings Part 1: the Steel Tank spec references drawing No. 1695-D-60017 which I did not find in Drawings Part 1?

ANSWER: Drawing 1695-D-60017 is included in the Solicitations as sheet 56 of the Drawings Part 3 file.

3. QUESTION: Sheet 1965-D-60041 indicates the Jack and Bore goes from station 22938+50 to 22939+30 (80’) -- The Bore Detail on sheet 1965-D-60052 indicates the bore goes from station 22938+50 to 22939+55 (105’). Can you please verify which quantity we’re to use?

ANSWER: 105 feet is the correct bore length. Drawing 1695-D-60052 shows the correct stationing and length. A pen and ink revision should be made to drawing 1695-D-60041 to correct the stationing to that shown on drawing 1695-D-60052.

4. QUESTION: There are only Dwgs pertaining to “Regulating Tank No. 2” NONE are Included for “Regulating Tank No. 1” is “Regulating Tank No. 1” part of this job? Where is it located?

ANSWER: Regulating Tank 1 is located in Pumping Plant 2 yard, and Regulating Tank 2 is at the end of the reach. Drawings 1695-D-60007 (Sheet 6), 1695-D-60008 (Sheet 7), 1695-D-60069 (Sheet 64), and 1695-D-60070 (Sheet 65) contain drawings for Tank 1 and Drawings 1695-D- 60009 (Sheet 8),1695-D-60010 (Sheet 9), 1695-D-60021 (Sheet 10), 1695-D-60071 (Sheet 66), 1695-D-60072 (Sheet 67),and 1695-D-60073 (Sheet 68) contain drawings for Tank 2.

5. QUESTION: Spec 331150, “AT NATURAL GASLINES, PETROLEUM-RESISTANT GASKETS ARE NOT REQUIRED”. Are all of the “GASLINES” shown Natural Gas Lines? None are labeled “PETROLEUM”, please confirm.

ANSWER: There are no petroleum line crossings. Lines labeled as gas lines are natural gas lines.

6. QUESTION: Plan Sheet 1695-D-60045, Note #7 states that Warning Tape is not Shown, but is required, See specifications for details. Yet no reference to Marking Tape appurtenant to the Waterline is included in the Specifications. Please specify.

ANSWER: Section 31 23 22 – Pipe Trench Earthwork has been revised in Amendment 2 to include the warning tape product description. Per paragraph 3.07.A the warning tape is to be installed at least 18” below the ground and at least 18” above the pipe.

7. QUESTION: Fitting Table Sheet 1695-D-66049: @ sta 22666+00.00 calls for a 10°47'56" bend.

No Bend is called out on the Dwgs, only a 2” Air Valve. Please clarify.

ANSWER: A pen and ink change is required to Drawing 1695-D-60036 to show the 10°47'56" miter bend at station 22666+00. Please follow the fitting table on Drawing 1695-D-60049 which includes the miter bend at Station 22666+00.

8. QUESTION: The following fittings have differing callouts from the Plan view to the profile view, please clarify what will be expected:

sta Profile Callout

Plan Callout

22711+66.28 23°03'54" 22°30'00"

22717+73.01 23°29'52" 22°30'00"

22721+66.01 23°41'05" 22°30'00"

22671+84.60 33°48'51" 33°45'00"

22964+22.69 45°00'52" 45°

22611+15.45 45°36'35" 45°

22434+51.71 56°29'34" 56°15’00”

22678+10.00 8°07'18" 8°40'42"

ANSWER: All but the last bend (sta 22678+10.00) are combined bends. On the plan and profile drawings, the profile callout shows the combined angle whereas the plan view shows only the horizontal deflection angle. The combined angle was calculated as the composite between the vertical and horizontal deflection angles.

The angle at Station 22678+10 is a vertical only miter bend. On drawing 1695-D-60036, the deflection angle was incorrectly called out as 8°40’42”. A pen and ink change is required to change the deflection angle at Station 22678+10 to 8°07’18”.

9. QUESTION: Can you provide a specific and single point of contact for the Navajo Tribe that could answer any and all questions relating to TERO fees and requirements? We don’t feel the current contract documents fully describe any TERO fees nor employment requirements?

ANSWER: There are no TERO fees/requirements on the Navajo Nation. All enquiries on Navajo taxes and employment should be directed to the following:

Office of the Navajo Tax Commission Highway 264, 100 Taylor Road Karigan Professional Building, Suite 115

St. Michaels, Arizona 86511 Telephone Number: (928) 871 - 6681 Fax Number: (928) 871-7608 Website: www.navajotax.org Email: nnontc@navajotax.org

Office of Navajo Labor Relations Window Rock & Ft Defiance Office W008-222 Doublewide Trailer Morgan Blvd.

Window Rock, Arizona 86515 Phone: (928) 871-6800 Fax: (928) 871-7088 Contact: Reynold Lee

10. QUESTION: Can you explain the contract time of 667 days? Are there assumed no work periods during various seasons to accommodate for weather or other concerns?

ANSWER: The contract time of 667 calendar days includes allowances for assumed winter weather shutdown periods and lost production days due to normal weather conditions. The contract completion date will be calculated by adding 667 calendar days to the date of the initial NTP for non-site work. Refer to Section F.1, Commencement, Prosecution, and Completion of Work, for details.

11. QUESTION: Has all Tribal archeological and/or environmental permits been issued and cleared for construction for this Reach?

ANSWER: All archeological clearances will be obtained prior to the issuance of NTP for site work.

(Refer to Section F.1). Contractor responsibilities related to the preservation of historical and cultural resources are identified in Section I.27, Preservation of Cultural Resources, and Specifications Section 01 57 90, Preservation of Historical and Archaeological Data.

Reclamation will obtain the environmental permits identified in Specifications Section 01 57 30, Water Pollution Control, which are identified as to be obtained by the Government. These permits will be obtained prior to issuance of the NTP for site work. (Refer to Section F.1). All other environmental permits shall be obtained by the successful offeror.

12. QUESTION: Can a list of any and all other questions asked by interested parties be made public?

ANSWER: Yes, questions and answers are publicly posted as amendments.

13. QUESTION: Can you supply a list of the utility company contacts for any necessary permanent services needed for the lift/pumping stations?

mailto:nnontc@navajotax.org

ANSWER: Electrical service will be provided by others to the points identified in the specifications and drawings. The successful Contractor will be required to coordinate with the utility owner to connect to their facilities. Please also see the revised Section 26 05 12 – Basic Electrical Materials and Methods, Section 26 16 12 – Medium-Voltage Power Cable, and added Sections 26 16 13 – Primary Unit Substation, and 26 13 26 – Metal Clad Switchgear and associated electrical drawings contained within this amendment for specifications for connecting the utility’s power supply.

Utility companies that will be supplying the electrical service are as follows:

- Pumping Plant 1 power will be supplied by Farmington Electric Utility System (505-599-

1353).

- Pumping Plant 2 power will be supplied by Jemez Mountain Electric Cooperative (505-753-

2105)

14. QUESTION: Can you supply the anticipated Notice to Proceed Date?

ANSWER: Refer to Section F.1, Commencement, Prosecution, and Completion of Work, for details.

15. QUESTION: In review of the plan and profile drawings sheets, it appears that there is 41 gas line crossings, 10 existing water main crossings and 3 electrical crossings. From our site visit we have counted way more existing utilities than that. Can CLIN 5 be changed to a “per each” rather than lump sum? Also, are the gas crossings to be done via bore, special method, etc or just open cut and cross?

ANSWER: Based on our quantity take offs, there are 71 buried and 17 above ground utility crossings. Please bid according the specification as a lump sum.

Natural gas line crossings of 2 or more utilities are to be crossed via bore and jack. Smaller diameter, single line utility crossings can be crossed via open cut. Coordination with the utility owners is required. In accordance with Note 10 of Drawing 16956-D-60045, CLSM is required for backfill at open cut utility crossings.

16. QUESTION: Upon review of the above referenced project plans and specification, we would like to formally request clarification or modification for the following items. Please consider the following request for modifications to the project specifications sections listed below for the above reference project:

ANSWER:

1) Since pipe stiffness is to be determined by the fiberglass pipe manufacturer, the minimum pipe thickness is unknown and cannot be presented on the table. The pipe should be designed to accommodate hydrostatic head shown in the symbol pipe designation.

2) Section 33 11 10, Part 1.02.B applies to all pipe materials as this section defines the symbol pipe designation. This paragraph has been revised in Amendment 2.

3) A “D” designation depth for 15 ft< D < 20 ft has been added in Amendment 2.

4) Section 33 11 19, Part 2.02.B. Fiberglass fittings will be added to the section title. In addition, Section 33 11 19, Part 2.02.B.1 will be revised to “Fiberglass Fittings: In accordance with AWWA M45, AWWA C950, and ASTM D5685.”

5) This requirement in Section 33 11 19, Part 2.05.B.1.c has been deleted.

6) This requirement in Section 33 11 19, Part 2.05.B.1.d has been deleted.

7) The trench side clearances shown in the “Side Clearance Table” are based on a soil trench and the use of either select material or CLSM embedment material. The “Trench Section” table provides the maximum cover depth if native material is used for embedment. No conflict exists in the tables. All values are based on a fiberglass stiffness factor of 18. If pipe with a greater stiffness factor is proposed, an RFI with supporting calculations could be submitted to optimize the trench section. Fiberglass pipe with native material for embedment may be allowed per manufacturer’s recommendations with supporting calculations in accordance with Reclamation’s “Method for Prediction of Flexible Pipe Deflection, M-25”.

17. QUESTION: Specification Section 33 11 10 – Table 33 11 10A states that Steel and Ductile iron are not allowed for Pipe Designation 24B50 – 24C540. Does this also mean that steel and ductile iron fittings are not allowed in these sections?

ANSWER: Table 33 11 10A refers to the line pipe material and not fittings. Steel and ductile fittings for the line pipe are allowed for the entire length of the project.

18. QUESTION: Specification Section 33 11 19 – G.2.b states that a 0.5 degree joint deflection may be permitted and that it must be on a 20 foot length of pipe. As a cost savings measure to eliminate fittings and to allow for field adjustments, is the contractor allowed utilizing the manufacturer’s allowable joints deflections and alternate joint lengths to eliminate fittings and maintain alignment.

ANSWER: Section 33 11 19, Part 3.01.G.2.b - Fiberglass Pipe has been revised in Amendment 2 to allow a total pull of 1.0 degree joint deflection for pipe head class less than or equal to 450-feet and 0.75 degrees joint deflection for pipe head class equal to and greater than 475-feet. Pipelaying Diagrams under submittal RSN 33 11 10-2 shall comply with this requirement..

19. QUESTION: What is the required safety factor for the restrained joints? Is it 2:1?

ANSWER: Yes, the safety factor required for restrained joints is 2:1.

20. QUESTION: Project Plans: Page 1695-D-60045 “Pipe Trench Installation” – We have verified that the “Screened Native Material compacted to a minimum of 85% SPD“ can be used with fiberglass pipe based on the 3% allowable deflection using the AWWA M45 Fiberglass Pipe Design Manual procedures and analysis for buried fiberglass pipe. Can “Screened Native Material” be used for fiberglass as it is allowed for other flexible pipe (PVC/HDPE)?

ANSWER: After verifying calculations utilizing an assumed fiberglass stiffness factor of 18, fiberglass pipe exceeds deflection criteria, for all practicable purposes, when native material is used for embedment. If pipe with a greater stiffness factor is proposed, then an RFI with supporting calculations may be submitted to utilize "Screen Native Material". Fiberglass pipe with native material for embedment may be allowed per manufacturer’s recommendations with supporting calculations in accordance with Reclamation’s “Method for Prediction of Flexible Pipe Deflection, M-25”.

21. QUESTION: the List of Dwgs, Table 520000A Lists sheet 60069 as Pumping Plant No. 2 - Regulating Tank No. 2 - Plan, Sections, and Detail - Sheet 1. The title on the sheet is Regulating Tank No.1, Plans Sections and Details. Is this a typo.

ANSWER: Yes, there is a typo in Table 52 00 00A - List of Drawings. For Drawing 1695-D-60069 (Sheet 64), the drawing title has been revised in Amendment 2 to read, "Pumping Plant No. 2 - Regulating Tank No. 1 - Plan".

22. QUESTION: Plan Sheet 1695-D-60050, Section B-B: What size is the Flow Meter Probe Insertion assembly?

ANSWER: The size of the flow meter probe varies by Manufacturer and depends on the company from which it is purchased. The flow meter selected will be reviewed during the submittal process.

23. QUESTION: Bid Item 330 calls for “Bore and Jack Station 22938+50 to 22939+55”, while Plan Sheet 1695-D-60041 calls for Bore and Jack Station 22938+50 to 22939+30. Which is correct?

ANSWER: 105 feet is the correct bore length. Drawing 1695-D-60052 shows the correct stationing and length. A pen and ink revision should be made to drawing 1695-D-60041 to correct the stationing to that shown on drawing 1695-D-60052.

24. QUESTION: Spec 33 11 18 is silent on whether the HDPE Pipe is to be IPS or DIPS. Which type of HDPE will be expected?

ANSWER: Either IPS or DIPS is acceptable.

25. QUESTION: The note eliminating the requirement for petroleum-resistant gaskets does not appear to be applicable to Ductile Iron Pipe, unless that pipe is Dielectrically coated. Are the coatings in Tabulation #6 of Spec 099620 considered Dielectrical coatings?

ANSWER: Yes. The coatings in Section 09 96 20 – Coatings, Tabulation No. 06 are dielectric coatings.

26. QUESTION: Would CERAMAWRAP™ EPOXY, or IRON STRONG Zinc Coating w/ V-Bio wrap be considered as options cor coating of Ductile Iron Pipe under Tabulation #6 of Spec 099620?

ANSWER: The coating requirements for ductile iron pipe can be found in Section 09 96 20 – Coatings, Tabulation No. 06. The CERAMAWRAP is a bonded dielectric coating that may be proposed as an “equal” product in accordance with specifications RSN 09 96 20-1. A final determination of acceptance would be made during the review and approval of RSN 09 96 20-1.

IRON STRONG Zinc Coating w/ V-Bio wrap is not a bonded dielectric coating and would not be considered an “equal” product in accordance with the specifications.

27. QUESTION: During the site visit we were informed that an overlay map of Navajo and private lands would be provided; however, we did not see that included in Amendment 1. Will this be providing in an upcoming amendment?

ANSWER: The following table provides land ownership information by station ranges. The attached map includes the same information.

NAVAJO-GALLUP WATER SUPPLY PROJECT

REACH 22B STATION RANGES FOR LAND OWNERSHIP

OWNER STA TO STA

BLM 22249+52.72 TO 22251+34.76

ALLOTTED LANDS 22251+34.76 TO 22329+52.98

TRIBAL TRUST 22329+52.98 TO 22335+37.06

BLM 22335+37.06 TO 22376+68.63

ALLOTTED LANDS 22376+68.63 TO 22525+72.95

BLM 22525+72.95 TO 22552+37.10

ALLOTTED LANDS 22552+37.10 TO 22607+92.80

BLM 22607+92.80 TO 22634+26.55

STATE 22634+26.55 TO 22689+20.17

BLM 22689+20.17 TO 22743+27.69

PRIVATE 22743+27.69 TO 22770+39.21

BLM 22770+39.21 TO 23093+38.55

28. QUESTION: On the lines designated as PVC or HDPE there are mitered bends called in steel or ductile, mitered bends don’t exist in ductile and how are you picturing the connection be made then to the pvc or hdpe pipe using steel mitered bends?

ANSWER: Standard ductile bends are allowed where the line pipe angle is suitable. Per the relevant specification sections, the fitting details are to be submitted for approval. An acceptable non-restrained steel joint would be a bolted sleeve-type coupling meeting AWWA C219.

29. QUESTION: 4 Steel Manufacturers so far will not quote the wall thickness called out as it is too thin of a wall and the pipe will warp and become damaged when welded together at the joints.

Will .1888 wall thickness be acceptable or something thicker?

ANSWER: The minimum steel thickness was determined by utilizing pressure and handling criteria found in AWWA M11. Steel pipe thicker than specified is allowed.

30. QUESTION: If quoting hdpe pipe instead of the pvc can we use hdpe mitered fittings instead of steel mitered fittings? If so instead of 2 piece mitered can they be 3 piece mitered fittings?

ANSWER: Heat fused HDPE miter bends are allowed per Section 33 11 18, Part 2.02.D. Per Section 33 11 18, the fitting details are to be submitted for approval. 3 vs. 2 piece mitered bend fittings are acceptable.

31. QUESTION: Please confirm the wall thickness and/or schedule of 16” steel pipe and small in the pump stations and appurtenances.

ANSWER: The wall thickness of the 16" Sch. 10 (.25" wall) manifold piping can be seen on drawings 1695-D-60066 and 1695-D-60069. The unit piping size of the pumps are not shown because the prepackaged manufactured pumping plant will be designed by others.

32. QUESTION: There are several detail drawings that make mention that the 24” steel should be schedule 10? The wall thickness of sched10 steel is .250 wall which is almost double the wall thickness called out on the bid schedule, please clarify which wall thickness is what is required for all steel pipe/all sizes.

ANSWER: The thickness of the steel pipe shown on detail drawings is greater due to specials of the steel pipe network in the yards. Reclamation uses a minimum 0.25 inch steel thickness due to fabricated tees, reinforcements, and specials as shown in yard piping requiring a greater factor of safety. Outside of the yard, minimum line pipe thicknesses are shown in Section 33 11 10 – Pipeline General Requirements.

33. QUESTION: On the CMP (Corrugated Metal Pipe) please confirm if standard Hel-Cor is acceptable or if it needs to be Ultra-Flow ?

ANSWER: If the CMP, such as Hel-Cor, meets the product requirements of Section 33 42 30, then the pipe is acceptable.

34. QUESTION: Sheet 1695-D-344 section D-D shows 6” Standard Steel pipe Valve box w/ Lockable covers; while Spec 332215, 2.01, E calls for Tyler 6855, Cast Iron, w/ no mention of Locking lid.

Please clarify.

ANSWER: Section 33 12 10, Part 2.05.E Valve Box has been revised in Amendment 2 to add a lockable lid as shown on drawing 1695-D-60050 section E-E. We believe the specification reference in the question is incorrect. The correct reference is Section 33 12 10, Part 2.05.E.

35. QUESTION: Please define the connections that will be required or accepted at the Mitre Bends.

ANSWER: Per the relevant specification sections, the fitting details are to be submitted for approval. An acceptable non-restrained steel joint would be a bolted sleeve-type coupling meeting AWWA C219.

36. QUESTION: Bid Item #63 calls for 2800 LF of 24B475 while Plans show 2500 LF. Please verify Qty.

ANSWER: The 2800 LF of 24B475 is the correct length. As shown on the Air Valve Drawing (1695-D60046) and the Blow off drawing (1695-D-60048), an extra 10 feet of 24B475 at each assembly is required. Similarly there is a decrease of 10 feet of surrounding line pipe around these features.

37. QUESTION: Spec 331113, 2.01, A, 1 requires 20’ Nominal Lay length. 24” DIP is manufactured at standard 18’ lay lengths. Please confirm that this is acceptable.

ANSWER: A standard lay length of 18’ is acceptable.

38. QUESTION: Polyethylene Wrap per AWWA C105 is only called out in Spec 331150 “Pipe Crossings at Existing Utility Pipelines“, not called for in the Ductile Iron Pipe spec or Pipe General Requirements. Is that intentional? Will polywrap not be required except at Utility Crossings?

ANSWER: Correct. Polyethylene wrap serves as an additional barrier when the line crosses various types of utilities to avoid potential contamination. The allowable coating for ductile iron pipe can be found in Section 09 96 20 – Coatings, Tabulation No. 06.

39. QUESTION: RE: Section 33 11 12, 2.01, Paragraph D…” Prepare pipe ends for field welding” We are asking to have this paragraph deleted since it contradicts the reference to “3.01.C-Joints for Pipe with Gasketed Joints” on the Section 33 11 12 Steel Line Pipe NOTE: If you do not delete that paragraph we will have to supply lap welded joins, which needs to be welded and such increasing the installation cost; Also the pipe wall thickness has to be increased to 0.25” per Note 7’ on 1695-D- 60049: (all restrained , ie.- lap welded) WSP is to have 0.250” minimum wall thickness)

ANSWER: Section 33 11 12, Part 2.01.D has been modified in Amendment 2 to read: “Prepare pipe ends for field welding where welded joints will be installed.”

40. RE: Note 7’ on 1695-D- 60049, all restrained WSP is to have 0.250” minimum wall thickness. We are asking to have Note 7 deleted, since the minimum calculated wall thickness appears to be 0.16” NOTE: Our minimum calculated wall thickness appears to be 0.16”. This is more than thick enough to accept a fillet weld. As you know, welders in the pipe community regularly fillet weld material down to and including 10 ga.

ANSWER: 0.250 inch minimum pipe wall thickness and resulting larger weld is needed due to the eccentricity stress that develops in the single lap weld when resisting the longitudinal thrust force.

41. Is there a specific brand and model number for the 15” OIT touch panel display?

ANSWER: Any generic panel that is compatible with the Modicon M340 PAC/PLC will be acceptable. The brand and model number for the programmable controller (PLC) is a Modicon M340, as specified in Section 25 00 02, Part 2.01 A.

42. On sheet 1695-D-60095 in the Notes you’ll find references to the Sub-Master HMI terminal screens being ported to the Fort Defiance Master Station for remote monitoring. Also in the Specifications document pg. 25 00 02 – 4 there is a reference to a large display on OIT for fire or security alarm that gets operator’s attention at the Fort Defiance control room. Is modifying the existing fort defiance system in the scope of this project? If so, what software does the existing Fort Defiance Master Station use?

ANSWER: The referenced display will be installed at the pumping plants, with a trouble alarm sent to headquarters (Fort Defiance). Modifying the existing Fort Defiance system is not within the scope of this contract.

43. In the Notes sheet 1695-D-60095, the Cutter Lateral Sub-Master Station is shown to include System Monitoring & Control, Historian – Trending, Human-Machine Interface, Operator Intervention and Environmental Controls. Is the Cutter Water Treatment Facility Sub-master Station and Cutter Water Treatment & Pumping Plant already in existence? If so, will we be adding to or modifying the existing HMI software at this location to show information and allow control of the new Plants 1 & 2, NAPI Turnout and Regulating Tank?

ANSWER: No, the Cutter Water Treatment facility (Reach 21) will be in construction concurrently with this contract. The scope of this contract is defined on 1695-D-60095 as the work within the Reach 22B phantom lines on the drawing. The contractor is required to allow for the future signal to Cutter Lateral Sub-Master Station and Fort Defiance system. Systems integration for the Cutter Lateral systems is part of the Reach 21 contract. Coordination will be required with the Reach 21 contractor.

44. What software is used or planned to be used for the Human-Machine Interface (HMI) at the Cutter Water Treatment Facility?

ANSWER: Compatible with Modicon Vijeo Citect.

45. Do u require prefab material aluminum, or carbon steel, structure or pipe?!

ANSWER: Requirements for the various types of materials utilized in this contract are addressed in the solicitation specifications. We suggest contacting potential bidders to determine any prefabricated material needs.

A L W

A Y S

T H

I N

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S A F E T Y

D

C

B

A

D

C

B

A

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