Tab_13_Amendment_3_Attachment_2_Reach_22b_Q A_Amendment__3R__(1).docx

SOLICITATION NO.: R16PS01019

NAVAJO GALLUP WATER SUPPLY PROJECT – Reach 22b

SAN JUAN COUNTY, NEW MEXICO

Contractor Questions and Answers Amendment #3

1) Question: Drawing 1695-D-60096 shows a detail for a Repeater Station. Section 27 20 01 – 3.01.J describes furnishing repeater stations as needed to achieve communication. Section 27 20 01 – 3.01A describes a Radio Survey Report: Supplied by the Government. Contact COR.

1. Can you define how many Repeater Stations are required for the project?

Response: Once the radio study is completed Reclamation will make it available to the Awardee. Bidders should assume that two repeater stations will be required to be installed within the scope of this contract. The towers will be located within the Reach 22B pipeline right-of-way. Exact locations will be determined in the radio study.

2. Can you confirm based on the government supplied radio survey that 30 foot towers will be sufficient for the repeater station(s) and for the NAPI Turnout site? Or can you provide the government supplied radio survey?

Response: Bidders should assume that 30 foot tall towers are sufficient height for the repeater stations and the NAPI turnout site.

2) Question: Section 22 11 35 – 2.08.B describes leaving room in the Pre-manufactured Pump Stations for the SCADA Equipment Cabinet, with 2.08.C, D, E & F describing the Local Area Network, Communication Systems, etc. being supplied by others. Drawing 1695-D-60096 shows the RTU and OIT for the Pump Stations installed in the SCADA Equipment Cabinet.

1. With the control of the Pump Stations a requirement of Section 22 11 35, it would appear the RTU and the OIT that are shown in the SCADA Equipment Cabinet are to be supplied as part of the Pre-manufactured Pump Stations. Are the SCADA Equipment Cabinets to be supplied with the Pre-manufactured Pump Stations, with the Local Area Network, Communication Systems, etc. being supplied by others?

Response: In accordance with Specification Section 22 11 35, Part 2.08, Control and Monitoring, B. SCADA System, 2., the Pre-manufactured Pump Station vendor that the Reached 22b contract awardee (Prime Contractor) selects is only required to “Provide location for SCADA Equipment Cabinet (36 inches wide by 24 inches depth by 80 inches height) with adequate room for opening single door to 180 degrees for operation and maintenance tasks.”

The awardee (Prime Contractor) will be responsible for coordinating, subcontracting or performing the following 2 Specification Sections: 1) Section 25 00 01 - Control and Monitoring, describes the product to be installed of the SCADA equipment cabinet in the space provided by within the pre-manufactured pumping plant and the internal features to be installed within the SCADA equipment cabinet. 2) Section 25 00 02 - Programmable Controller describes the product, installation, and programming of the PLC.

1) Question: Spec 331116, 2.02, D, 4 calls for MegaLug 2500 Series Restraints between Mitre Fittings and PVC Pipe. This Restraint is designed around a PVC Fabricated fitting. Per the Spec these wiwalte Steel Fabricated fittings, these steel fittings will not be capable of using an integral Gasket like a PVC Molded fitting could. This means that the gasket will require a backup gland (or similar) for compression. This will create a conflict between this required backup ring and the through bolts for the Megalug 2500 series restraint. Please provide a detail for these connections?

Response: Joint details are to be provided to suit the material type, dimensions, and restraint requirements for the pipe and fitting material selected by the contractor. Shop drawings are to be submitted per RSN 33 11 16-1.

2) Question: Spec 331116, 2.02, D, 4 calls for MegaLug 2500 Series Restraints between Mitre Fittings and PVC Pipe. Per EBAA.COM these restraints seem to have a pressure rating of 165 psi. Will that be sufficient for ALL locations?

Response: Please see Revised Specification Section 33 11 16, PVC Pressure Pipe. Pressure ratings of the fittings need to match or exceed the symbol pipe pressure designations.

3) Question: Spec 099620, Tabulation #6, Option 1 mentions only the Cement Mortar Lining, what are the Coating requirements under Tabulation #6, Option 1?

Response: Per Tabulation #6, Option 1, the interior cement mortar lining is to be in accordance with AWWA C104, C205, and/or C602.

4) Question: Will Ductile Iron Fittings along the Line Pipe be coated and lined according to Tabulation #5 or #6? Please clarify.

Response: Ductile iron fittings should be shop coated by the fitting supplier in accordance with the AWWA standards.

5) Question: Spec 099620, Tabulation #6, mentions metal fittings for Turnout PVC piping. Details for NAPI Turnout call for Steel Pipe. Is PVC an option at this location?

Response: PVC fitting is not an option at this location. Steel or ductile iron are allowable per 33 11 16 2.02.B.

1) Question: Specification Section 26 42 10 Galvanic Anode Cathodic Protection 3.01-H Galvanic Anodes states:

1. Install horizontally or vertically as follows and as directed by the COR:

a. Steel Line Pipe Location:

1) Install 2 anode beds.

a) Sixteen anodes per bed as shown in drawing 1695-D-60107.

i. Eight anodes on each side of the anode junction box.

2) One anode bed at each end of pipe section.

3) Minimum 40 feet from nearest part of structures to be protected.

4) Minimum 20 feet from one another.

Question Re: # 2) above what constitutes a “pipe section”? We need to be able to determine an anode bed spacing the designer is requesting.

Response: The pipe section is for the entire length of metallic pipe (Steel or Ductile) which is in one section (See Plan and Profile Sheets). Two anode beds (total) are needed for the metallic line pipe portion of the pipeline “One anode bed at each end of pipe section”. Please reference Specification Drawing 1695-D-60107 (Sheet #83) for anode bed detail.

1) Question: In section 27 20 01-3 article 2.04 and section 27 20-01-4 article 3.01 it states that a radio survey report as well as LOS Study is to be supplied by the Government and to contact the COR. Is this report currently available to verify antennas for the project as well as to verify suggested antenna mounting heights at the tower locations as well as at the 2 pumping plants?

Response: Once the radio study is completed Reclamation will make it available to the Awardee. Bidders should assume that 30 foot tall towers are sufficient height for the repeater stations and the NAPI turnout site.

2) Question: In section 27 20 01-3 article 2.03 item A says the equipment cabinets are to be used only at repeater sites. We are unable to locate in the plans or documents anywhere that describes which sites are to be considered a repeater site. The only reference we have seen regarding a repeater site is in drawing 1695-D-60096 “REACH 22B MDS RADIO REPEATER STATION”, where exactly is this to be?

Response: Once the radio study is completed Reclamation will make it available to the Awardee. Bidders should assume that two repeater stations will be required to be installed within the scope of this contract. The towers will be located within the Reach 22B pipeline right-of-way. Exact locations will be determined in the radio study.

3) Question: In section 27 20 01-4 article 2.06 it says to reference 27 15 00- for cables and conductors. In section 27 15 00-5 article 2.08 “Coaxial Cable” item B calls out an RG-58U cable. In drawing 1695-D-60096 it calls out RG-59 cable instead. Is the coaxial cable a hard spec or can comparable/ better products be used? With some of the distances from the radio to the antenna there is a significant amount of signal line loss and for installations similar to this we would typically use a 3/8” coaxial comparable to being slightly larger than RG-11. Would this be sufficient to run from the surge arrestor device to the antenna and then a smaller gauge that would be more flexible comparable to the RG58/ 59 size from the surge device to the radio?

Response: Please Note: Official revised Specification and Drawing will be posted in a forthcoming amendment. Changes to the following Specification section and drawing as follows: In Specification Section 27 15 00, Page 5, Part 2.08, Coaxial Cable, Item B is changed from RG Type: 58/U to “Type: RG” and on Drawing 1695-D60096 (Sheet 76) is changed from RG59 Coax to read “Coax”. The Contractor can submit on and use comparable and preferably better products if approved and at no additional cost to the Government. The contractor is responsible for making the communications operate properly. If the design calls for antenna placement creating longer distances requiring a lower attenuation cable such as RG-11 then it may be acceptable to deviate from the cable types called out in Specifications to make the system function properly. Any deviations would have to submitted and approved by the Contracting Officer.

4) Question: For antenna cabling at the pump site 1 and 2 is it safe to assume that RMC will be required as well to run from the panel to exit the structure?

Response: Clarification needed to answer, but RMC connectors for antenna cabling are required for equipment terminations.

5) Question: In section 27 30 01, is there a particular brand/ model phone to be used? What phone system will they need to integrate with?

Response: Any brand which meets the salient requirements of Section 27 30 01 will be acceptable.

1) Question: Industry standard such as AWWA C950 and AWWA M45 clearly require clean and free of object. Under “Questions and Answers,” the bedding and backfill for FRP pipe is changed from select fill to native soils, without clarifications as the native has to be processed to be free of sharp rocks and cobles that are larger than ½”. Larger rocks in the backfill could point load the pipe wall and result in early failure of the pressure containment in the system.

Response: ¾” is the maximum particle size allowable for 24” per M45 Table 6-3. This ¾” maximum size is shown in the 22B specification on Table 31-23-22A and on Drawing 1695-D- 60045.

2) Question: The specifications adds ASTM D5686-11 for Fiberglass Pressure Pipe Fittings. That ASTM is discontinued since 2002. However there is an ASTM D5685-11 in existence covering FRP pipes made per ASTM D2996 and D2997 (fiberglass with no mortar fillers). Please clarify what the intent of USBR is for the fiberglass fittings and what ASTM must be met?

Response: D5686 has been corrected to D5685. Fittings are fabricated in accordance with ASTM D3517 and as per 33 11 19, 2.01. Fittings are to be tested in accordance with procedures in ASTM D5685 and as per 33 11 19, 2.04.

3) Question: If ASTM D5685 is used, then Fiberglass Pressure Pipes made per ASTM D2996 Filament-Wound and D2997 Centrifugally Cast will be included in the specifications. Please clarify.

Response: Fittings are fabricated in accordance with ASTM D3517 and as per 33 11 19, 2.01. Fittings are to be tested in accordance with procedures in ASTM D5685 and as per 33 11 19, 2.04.

4) Question: ASTM D5685 (if correct) under Paragraphs 6.3 and 7.4, require 100% of the fittings to be tested in the factory to 1.5X the design pressure. It does not clearly state that combined surge and design pressure (total) should be set as the minimum when determining the test pressure. Please confirm if the factory test is up to maximum design times 1.5 and or combined surge+design (peak pressure) times 1.5?

Response: ASTM D5685, 6.3.1, requires three times the static-rated pressure. Test pressures are defined by head classes as shown on drawings.

5) Question: Paragraph 1.03-D “Qualifications” require three prior pressure pipe projects in 24” and larger without the minimum footage or design pressure. For example would a project with 500 LF of 36” pipe designed at 25 psi be acceptable as a qualifier as part of the submittals?

Response: Qualifications are as identified in section 33 11 10, 1.07.

6) Question: Please confirm all fittings, couplings and connections have to be tested for minimum 162 hours under static testing and 262,000 cycles under cyclic loading per ASTM D5685-11. See below the exact requirements per ASTM D5685 for more details.

Response: Test specimens for cyclic tests are identified in ASTM D5685, 7.4.3 7/27/2016 Page 5 of 5