24R0021 - RFI Responses - 10 Sep 2024.pdf

Solicitation Number FA487724R0021

Title FBNV240027 Sustainment for Over-Head Electrical

RFI No. RFI Response

RFI - 0001

Is the contractor need to add cross arms for all poles, or just match the existing pole? and what type of cross arm should supply?

See 1.6.10.2.5 and 1.6.10.2.6 for replacments locations. 1.6.10.2.12 lists what to be replaced on poles and type of cross arms Add Class 2 to 1.6.10.2.12

RFI - 0002 Where the poles be energized or dead when work is done? See 1.6.10.2.16. Existing poles are energized. Outage needs to be planned and coordinated with the base to minimize impact to mission.

RFI - 0003

In the SOW section 1.6.10.2.2 it states to replace overhead lines to pole 850 and on to pole 851. These poles are not identified on the provided drawings. Please indicate where these poles are located or if Pole ID’s 850 & 851 are incorrect and are actually supposed to be a different pole ID number?

850 and 851 were included in original image prepared, and are the poles located near bldg 4870.

RFI - 0004

Please identify the pole location from SOW 1.6.10.2.3 (pole 237, 238, 640, 645, 649, 650, 661, 851)? It is not shown as referenced.

Poles 237, 238 are W of Bldg 21407 Poles 640, 650 removed from SOW add 646a to SOW Poles 645 is NE of Bldg 130 Pole 649 is E of Bldg 88 Pole 661 is S of Bldg 81 Pole 851 is W of pole 849

RFI - 0005

Please clarify from SOW 1.6.10.2.5 Replace existing poles, (poles 237, 274, 638, 654, 658 & 849). These are marked as existing to remain in place and not “red” doted for replacement on the drawings. Can the gov. please clarify replacements and proper pole ID’s with both the SOW and drawing?

Updated drawing

RFI - 0006

In SOW 1.6.10.2.6 in indicates to replace existing switch poles. The current air switch is on pole 671.5 now, NOT pole

671. Drawing references to put it on pole 671 on the new install. Is this correct??

Install on Pole 671.5 Updated drawing to show installed on 671.5

RFI - 0007

What minimum KV rating does the government require for the overhead hardware? Example, combo fused cutouts KV rating? Arrestor’s KV minimum rating?

See 1.6.10.2.11 18kV lighning arrestors are called out. Contractor responsible for sizing per 1.6.10.1.

RFI - 0008

Will any existing overhead Fusing be replaced with new equal Amperage sized fusing as to what is installed currently?

Any pole being replaced, that has fuses installed will need to be replaced with new equal sizing fuses.

Added fuse details 1.6.10.2.12

RFI - 0009

In SOW 1.6.10.2.6 pole 646 is indicated to get a new air switch. The pole currently has a lower line crossing that is tapped off the upper line crossing. How does the government want the switch configuration to be installed when it comes to the upper and lower lines being considered?

remove switch replacement of 646 from SOW and taken off drawing

RFI - 0010

Please confirm SOW line item 1.6.10.2.10. Install 600amp disconnect. Is this just a 600amp knife blade switch with no lower operator control mechanism?

See 1.6.10.2.13

RFI - 0011

Please confirm SOW line item 1.6.10.2.10. Install 600amp disconnects on pole 643. Will the knife blades be installed on the Mainline paralleling Herky street or installed on the installed on the tap going North East across Herky street?

Main Line. If a buidling feed comes off pole, connect to down stream side of disconnect.

Updated drawing and SOW to show this as being on pole 652 not 643

RFI - 0012

There are poles indicated on the drawing with “red dots” to be replaced that are not matching up with what the SOW pole replacements is saying for pole numbers. Can the government please revisit the SOW and Drawing in regards to the pole ID’s as it seems there is a lot of confusion between the them on proper pole ID for the work being done and where?

Updated drawing

RFI - 0013

SOW section 1.6.2.1 States to disconnect and remove existing all associated electrical circuits, cables, devices, insulators, raceways and risers etc. to their source “FROM” the overhead distribution.

Recycle and provide credit to gov. The way this is written it seems that the intent is to replace all existing medium voltage cable or wiring that taps off the overhead to each tapped facilities service whether it be secondary power or medium voltage power cable. Is the intent to replace all tapped feeder conductors to each facility’s service? If not where is the cut off for bid purposes for this line item? Please explain intent of line item 1.6.2.1 in further detail?

Updated 1.6.2.1 and 1.6.10.2.14 to resuse existing risers

RFI - 0014

Should each pole on the map be checked using Resistograph Bore procedure?

a. This will ensure wood poles are either good or bad.

The contractor is required to inspect all poles affected by this project, regardless if it is called out as being replaced. That is the intent of the allowance for additional poles to be replaced if needed, see 1.6.10.2.11

RFI - 0015 Are the poles being remarked by the contractor with the numbers shown on the site map?

Contractor to mark all poles per drawing.

Added section 1.6.10.2.21 for tag details

RFI - 0016 As new 4/0 ACSR will be installed, should the existing neutral be replaced to support the ACSR size increase?

System is an ungrounded Delta. There is no neutral. Ground wire sizing to be confirmed by contractor as part of their design. See 1.6.10.1.

Added to section 1.6.10.2.13 10' 4/0 copper ground rod at any location a switch is being installed or replaced. Ensure ground rod extend 6" above grade after installation. To be used for Personal Protective grounding

RFI - 0017

As per job description we are to reconductprimary phases to 4/0 ACSR, We are assuming a reconduct of the neutral conductor. Please provide the size. Common practice is running a reduced neutral, 1/0 ACSR would be sufficient.

same as RFI 16

RFI - 0018

Section 01011, Paragraph 1.6.10.2.14 states to remove and replace riser conductors and conduit. We cannot replace riser conductors without pulling in a whole new run of primary underground or installing a new sectionalizing cabinet and installing new cable from there to the new pole and riser. Also, the riser conduit looked in good working order. Our pole changeout process would allow us to safely go back in the old pole hole without affecting the riser conduit or riser conductor. Is replacement required?

same as RFI 13

RFI - 0019

Section 01011, Paragraph 1.6.10.2.18 states to provide and install all new cable conduit as necessary from new switches to existing electrical distribution. Provide wiring, connection, and all accessories. What conduit is being referenced from the switches to electrical distribution? Please provide clarification.

1.6.10.2.18 change to say "conductor and conduit as necessary"

RFI - 0020

Regarding riser poles that will NOT be changed out, but will be reframed with new crossarm and required hardware for heavy conductor framing, pole numbers are (1333, 274, 639, 843, and between 643 and 642 pole is there with no number)

a. Would DMAFB like for the riser be updated with new, fused loadbreak cutouts, 18kv LA’s, aluminum 3phase cutout mounting bracket, aluminum 3phase mounting bracket for LA’s and cable terms. As per most up to date specs for OH electrical distribution standards.

See section 1.6.10.2.11. This section is not restriced to poles being replaced. Additional LAs not called out but should be replaced.

Added details to 1.6.10.2.12 to include load break details

RFI - 0021

Regarding Poles 647, 644, 652, 655, 659, 660 that are called out for replacement, would DMAFB like the riser to be updated with new, fused loadbreak cutouts, 18kv LA’s, aluminum 3phase cutout mounting bracket, aluminum 3 phase mounting bracket for LA’s and cable terms, as per mot up to date specs for OH electrical distribution standards?

see RFI 20

RFI - 0022

For pole holes that may have to excavated with the use of a VAC machine (vacuum and high pressure water) there will be no material for backfilling around new pole. Will the use of pole foam be allowed?

contractor should provide fill matrial correct, not pole foam, correct?

RFI - 0023 Is the contractor keeping the demolished overhead cable? contractor to remove and recycle and provide credit.

Updated 1.6.2.7 to include all conductors.

RFI - 0024 Does DMAFB want the demolished wood poles? See section 1.6.2.5

RFI - 0025 What material type is preferred for cross arms? Designated length, class, and material (wood or fiberglass). see RFI 1

RFI - 0026 Outages will be required at many pole locations. Will the outages need to take place after hours/weekends? see RFI 2

RFI - 0027

Can DMAFB provide a one-line drawing of the system showing switches, breakers, and locations?

Distribution system is shown as a one line diagram map provided.

Contractor to include one line diagram in design if required.

RFI - 0028

Please confirm wage determination – electrician (excludes low voltage) Rate of $31.00 Fringe 22.33%+6.00 This is correct as of 10 September 2024

RFI - 0029

Please confirm the required design packages. Section 01011, Paragraph 1.6.1.2 calls for 35%, 65%, 95%, and 100% design while Section 01011, Paragraph 2.12.1 calls for 65%, 95%, and 100%.

okay with 65% 95% and 100% updated section 1.6.1.2

RFI - 0030

Please confirm the contractor is solely responsible for field verifying provided civil / base utility information per Section 01011, Paragraph 1.6.3, and that no civil design is required for this project per Section 01011, Paragraph 3.

Drawings are provided for reference only. Contractor is responsible to field verify area called out in SOW, and provide assement, and detailed design. See sections 1.6.10.2.17, 1.6.10.1 and 1.6.3.1

RFI - 0031

Please confirm per Section 01011, Paragraphs 1.6.4-1.6.10, only electrical design is required for this project.

Civil and mechanical design is contractors responsibility to determine if required.

Request for Information Tracker Log

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