PreBid Govt Revised Response for WWYK200051 Replace Switchgear Bldg 1 ( 06.22.2026).pdf

RFI's For WWYK200051 MAC BOA ~ Replace Switchgear, Bldg 1

1. Is the new wall panels and gates to be grounded?

Government Response: Bid as advertised. Conduct work in accordance with drawings and specifications sealed and dated on 04/10/26

2. Sheet E 001, General Note 1, states all work to be IAW 2023 Tinker AFB Electrical Standards, please confirm we are not to follow the current 2026 standards.

Government Response: Contractors are to follow the 2026 Electrical Standard.

3. Sheet ED 401, General Note 4 states to refer to specification section 26 20 00, however no specifications have been provided. Please provide all technical specifications.

Government Response: The IFC specifications are located in the contractor CD.

4. Sheet E 100, Keyed Note 2 states to provide temporary power during equipment replacement. Please provide an amperage load that will need temporary power during the scheduled outage.

Government Response: Amperage loads for the building are not available. Loads are indicated on keyed note 2 of sheet E-100, 500KVA. Refer to Contract Documents sealed and dated on 04/10/26.

5. Sheet E 100 , Detail 4 shows very specific measurements for new equipment. Is there a basis of design the contractor should follow?

6. Sheet E 601 and E 70, General Note 4 states undertake inspection and testing to ensure compliance with NFPA 70 (NEC). Please confirm that any installation found not to be in accordance with NFPA 70 shall be considered an unseen site condition, as contractors will not be able to quantify any issues prior to proposal submission.

Government Response: It can be considered unforeseen. Now whether the government will issue a modification to correct this work will be determined through an RFI process.

7. The solicitation indicates that the POP is 180 days. Lead time for equipment are currently more than 365 days. Please confirm the POP will be extended.

Government Response: Long lead times for equipment are an exemption we will be able to put the project on hold until the equipment arrives.

8. Are there any areas within the project that may require escorts?

Government Response: No

9. Sheet G 101, Life Safety Notes #1 states for exit lights and emergency lighting, see electrical drawings. The electrical drawings to not show new exit and emergency lights. Please confirm if these are required by the RFP.

Government Response: Conduct work in accordance with drawings and specifications sealed and dated on 04/10/26

10. Please confirm if all new conduit installed in the dock area, needs to be GRC.

Government Response: All exposed conduits must follow 2026 Tinker Electrical standards, 3.3.2 Raceways as indicated on Contract Document. Conduct work in accordance with drawings and specifications sealed and dated on 04/10/26

11. Is there a design analysis for this project?

Government Response: Not for distribution to the contractor.

12. Sheet E 601, please confirm the watthour meter shall be Schnieder Electric

ION 8650.

Government Response: As stated per Contract Document sealed and dated on 04/10/26, follow Tinker AFB Electrical Standard.

13. It was observed during another project that the feed to Panel B-9 is old cloth covered wire. If additional cloth covered wire is found on other loads, will these be required to be replaced with new wire, or allowed to be extended per E601 Key note 2 so long as they pass testing per NFPA 70?

Government Response: Provide new conductors as indicated on updated drawings dated 6/17/2026.

14. Please provide photos of electric room depicted per detail 2 on sheet E-100.

Contractors were not allowed access during the initial site visit.

Government Response: Concur see attachment 2 for pictures.

15. Sheet E -001, General Note 3 states to provide fire stopping for fire rated walls.

See Architectural plans for rated wall location. No such plans have been provided.

Please provide locations of fire rated walls.

Government Response: There are not any Architectural scope. Disregard the General Note 3.

16. Please provide the complete project specification package. At this time, only Division 0 and Division 1 specifications appear to have been posted on SAM.gov.

Since this is a fully designed project, additional specification sections associated with the design documents are necessary in order to fully review the project scope and prepare an accurate proposal. At a minimum, please provide all technical specification sections referenced by or associated with the issued submittal register. Please note that review of the complete specifications may generate additional RFIs.

Government Response: Located in the contractor CD.

17. The submittal register includes load flow study, fault current study, coordination study, and arc flash study. What are the extents of these studies?

Government Response: Refer to specification section 26 05 73 for the scope of the study

18. Regarding the studies listed above, what actions are to be taken (if any) if a study reveals that existing equipment is inadequately rated or otherwise unsuitable for continued use?

Government Response: An RFI will be submitted and the government will evaluate the data to determine next steps.

19. For the load flow study, what loads should the analysis be based on?

Government Response: Refer to specification section 26 05 73 for the scope of the study

20. SOW paragraph 2.3 says there is no Government-required construction phasing for this Order. RFP Drawing E-100 includes significant phasing notes. Are these notes to be considered requirements or should they be considered suggestions?

Government Response: See general note above on sheet E-100. There is no phasing plan required, sequence of work can be up to the contractor.

THE FOLLOWING PHASING PLAN IS A GENERAL

SEQUENCING PLAN THAT IS NOT DEEMED TO BE FINAL.

THE CONTRACTOR AND THEIR SUBS MUST PREPARE

THEIR OWN OPERATIONS PLAN AND PHASING PLAN

VALIDATING AND CONFIRMING SEQUENCING AND

TIMELINES THAT WILL ALLOW THE WORK TO BE

COMPLETED IN A LIMITED AMOUNT OF TIME DURING

PLANNING OUTAGES. CONTRACTOR WILL BE

RESPONSIBLE TO PLAN AND COORDINATE WITH THE

CONTRACTING OFFICER, BASE CE, OG&E, AND ANY

OTHER PARTY AS NECESSARY TO ENSURE ALL WORK

IS ACCOMPLISHED IN A TIMELY FASHION AT A TIME

THAT WORKS FOR ALL PARTIES.

21. The RFP drawings appear to include replacement of panel “B9” which was already replaced in 2025. Should panel “B9” be deleted from the scope of this project?

Government Response: Provide new conductors as indicated on updated drawings dated 6/17/2026.

22. RFP drawing E-100 phasing notes include requirements for temporary power during equipment replacements. Are there any noise restrictions or other complications that need to be taken into consideration when planning these temporary power provisions?

Government Response: Please see SOW para. 1.7 for bioenvironmental regulations.

23. The demolition one-line diagram on RFP drawing ED601 shows 480V USS UID-1-SWGSEC-5 to be connected to a 1000kVA transformer with 120/208V secondary voltage. Pleases clarify.

Government Response: It should be 480V/277 on secondary, in lieu of 208V/120

24. The construction one-line diagram on RFP drawing E-601 shows a new 8-way 4”PVC duct bank (7 used, 1 spare) from the existing 1500 kVA OG&E transformer to the new 480//277V switchgear. What is the proposed routing of this duct bank?

Government Response: Refer to Contract Documents, sealed and dated on 04/10/26 for routing.

25. The construction one-line diagram on RFP drawing E-601 shows a watthour meter per TAFB electrical standards. Is this watthour meter existing or new?

Government Response: The Contract Document indicates as new. Refer to Symbol Notes No. 10 for legends on sheet E-001. Solid/dark lines are new. Gray line types are existing.

26. If the watthour meter discussed in the previous comment is new, what is the desired location for that meter?

Government Response Coordinate with OG&E and Tinker Onsite team for additional information.

27. On RFP drawing E-401, keyed note 2 says to make connections “after equipment running.” Please clarify.

Government Response: After equipment installed and running properly

28. Do the remote operation panels shown on RFP drawing E-501 need to be weather resistant?

Government Response: Yes, NEMA 3RX

29. Is the design intent for the 480/277V and 120/208V switchgear enclosures to be walk-in configuration?

Government Response: Refer to specification section 26 23 00 for additional information.

30. On RFP drawing E-601, should the SPD wiring for both the 480/277V and 120//208V switchgear include an additional #4 conductor for the neutral connection?

Government Response: Provide neutral and should be installed as close as possible per equipment manufacturer

31. RFP drawing E-601 shows the 480/277V switchgear to have 2500A bus with a drawout main breaker having 3200A frame and 2000A trip. Would it be acceptable for this gear to have 2000A bus and the main breaker to be 2000A frame and 2000A trip?

32. On RFP drawing E-701, 120/208V panels “LPO” and “B-9” are shown to have 14kAIC interrupting rating. 14kAIC is not a readily available rating at 240V and below. Can these panels be provided with 10kAIC rating?

drawings and specifications sealed and dated on 04/10/26. The short circuit should be determined by power system study, specification section 26 05 73.

33. General note 5 on RFP drawing E-601 and general note 4 on RFP drawing E- 701 says that existing feeders and branch circuit conductors affected by this project are to be inspected and tested to ensure compliance with NEC 70. If conductors fail inspections or tests will this be treated as an unforeseen site condition?

Government Response: Yes and the government will evaluate through the RFI process if replacement is required.

34. Our recollection from previous projects is that many feeders and other conductors at Building 1 are old rubber insulation with cloth jacket (often referred to as ”ragwire”). Some conductors are aluminum. If these conductors are encountered on this project, will they be addressed as unforeseen site conditions?

Government Response: Yes and the government will evaluate through the RFI process if replacement is required.

35. The 1442 shows a due date of June 12 but SAM.gov shows a due date of June

16. Can you please provide the correct due date?

Government Response: The due Date has been updated to June 12 to match the solicitation.

36. Please confirm whether a bid bond not is required with proposal submission.

Government Response: See Clause 52.228-1

37. Contracting Please confirm Performance and Payment Bond requirements, including: a. percentage required

b. timing of submission

c. whether bonds are required at proposal submission or post-award

Government Response: Percentage determined between contractor and insurance surety companies. See blocks 11 & 12 of solicitation for submittal timing. It is normal to have submitted within 10 days after award and must be received before notice to proceed can be completed.

38. Please confirm allowable working hours, including whether after-hours or weekend work will be permitted for planned outages and shutdown activities.

Government Response: Normal working hours are required (0700-0500). However, weekend work and after hours work will be need to be requested. More than likely all requests will be approved unless the user is unable to accommodate.

39. Please identify any blackout periods, restricted work windows, or mission-sensitive no-work periods associated with Building 1 operations.

Government Response: All dates are fair game. Please see answer to question 38 for after hours or weekend work.

40. Please identify approved laydown, staging, parking, and material storage areas available for contractor use.

Government Response: Contractor is required to submit their laydown area per the submittal register. We won’t know what’s available until after award. In past projects we have been able to get a laydown area just north of the dock in the B1 horseshoe area.

41. Please confirm whether temporary office trailers, storage containers, and dumpsters may remain onsite overnight and identify any restrictions.

Government Response: This will be dependent on the staging area. Everything noted above will be allowed to stay overnight as long as it’s within the limits of the laydown area.

42. Please clarify required outage coordination procedures and notification lead times with OG&E and facility personnel for demolition, shutdown, reconnection, and final energization activities.

Government Response: See SOW 2.11.3. 21 days.

43. Please identify allowable shutdown windows and maximum allowable outage durations for switchgear replacement activities.

Government Response: No minimum shutdown, however if its longer than a weekend outage temporary power will need to be provided to keep the facility running.

44. Please confirm whether temporary power provisions or temporary systems will be required during demolition and switchgear replacement operations.

Government Response: Refer to sealed and dated contract document on 04/10/26 for temporary power requirement.

45. Please provide any available arc flash studies, coordination studies, breaker testing reports, or existing electrical system studies relevant to Building 1 switchgear replacement work.

Government Response: All available asbuilts and reports were provided in the testing CD. These are very limited so may not have all the reports requested.

46. Project Management Please confirm anticipated Government review durations for: a. standard submittals

b. resubmittals

c. delegated design submittals

d. outage/shutdown requests

Government Response: See Sow 2.11.3

47. The SOW states the Government has provided a 100% design with delegated design responsibilities limited to specific components.

Please confirm contractor design responsibilities are limited to delegated design items specifically identified within the contract documents and specifications.

Government Response: Confirmed.

48. Section L includes CUI/source selection marking requirements and the solicitation includes DFARS cyber clauses. Please confirm whether contractors and subcontractors will be required to process, store, or transmit Controlled Unclassified Information (CUI) or Federal Contract Information (FCI) beyond standard proposal preparation and routine construction administration documentation.

Government Response: The project requirements have been reviewed and CMMC / CUI levels are not required… however, documents should be marked Source Selection Sensitive.

49. Please confirm whether weather days are included within the 180-calendar-day contract duration.

Government Response: Yes, the 180-calendar-day contract duration includes normal, anticipated weather days based on historical weather data for the project location. The Government will only consider time extensions for delays caused by unusually severe weather. To warrant a time extension, the weather must be unforeseeable, beyond your control, and demonstrably worse than historical averages for the area. Furthermore, any such weather must directly delay the critical path of the scheduled work. If you experience unusually severe weather that you believe warrants a time extension, you must notify the Contracting Officer in writing within 10 days of the beginning of the delay. Please note that while unusually severe weather may entitle you to a non-compensable time extension, it does not provide a basis for additional financial compensation

50. Please provide any available as-built drawings, existing condition reports, or field investigation documentation referenced by the design team during preparation of the contract drawings.

Government Response: Located in the contractor CD.

51. The SOW indicates no known ACM, heavy metals, or LBP concerns in the work area. Please confirm whether any hazardous material surveys or supporting environmental reports are available for contractor reference.

Government Response: See attachment 1- Inspection Report.

52. Please clarify contractor responsibilities for startup, testing, commissioning, infrared scanning, relay testing, and final acceptance testing associated with the new switchgear installation.

Government Response: See specifications and submittal register in the contractor

CD.

53. Please confirm whether the project is tax exempt and provide exemption certificates if applicable.

Government Response: Project is not tax exempt, no certification to provide.

54. Please confirm subcontractor and supplier quote backup documentation is not required at time of proposal submission and may instead be provided by the apparent successful offeror upon Government request during evaluation or post-award.

Government Response: Subcontractor quote should be included and available.

55. Please confirm whether the existing feeders, conduit systems, and underground raceways serving the existing substations/switchgear have been field-verified by the Government as suitable for reuse with the new equipment and conductor terminations.

Government Response: Per Contract Document, this work should be included within the Contract. Refer to General Note 3 on ED401 and General Note 5 on

ED601

56. Please clarify whether the Contractor will be permitted to perform exploratory shutdowns, infrared scanning, tracing, megger testing, or investigative work prior to final outage activities in order to verify existing conditions and feeder identification.

Government Response: Concur.

57. Please confirm whether all existing breakers, feeder labeling, circuit destinations, and panel schedules shown in the contract documents have been field verified by the design engineer. Please identify any known discrepancies between record drawings and existing conditions.

Government Response: Refer to General Note 3 on ED401 and General Note 5 on ED601. The information provided on Contract Document based on bas-builts and limited visible information, which cannot all be verified. It’s Contractor scope to verify and confirm based on Notes as indicated.

58. Please clarify whether temporary grounding, arc-flash protection barriers, infrared shielding, or other temporary personnel protection systems will be required during phased demolition and energization activities.

Government Response: See Facility Standards in the contractor CD. Specifically, section 28 - Safety Requirements.

59. Please confirm whether the existing grounding electrode system has adequate capacity for the new switchgear installation or whether supplemental grounding electrodes/testing will be required as part of this projects.

drawings and specifications.

60. Please identify required acceptance testing standards for the new switchgear installation, including whether testing shall comply with NETA ATS, NETA MTS, manufacturer startup requirements, or another standard.

drawings and specifications. Refer to specifications Division 26 for information.

61. Please clarify whether the Contractor is responsible for utility coordination, outage approvals, switching procedures, and lockout/tagout documentation, or whether these activities will be directed and controlled by Government personnel.

Government Response: All will be coordinated by the contractor. See submittal register and the outage requirements in the SOW

62. Please confirm whether selective coordination studies, short circuit studies, breaker coordination updates, or arc flash label updates are required under this project.

Government Response: Refer to specification section 26 05 73 for requirements.

63. Please confirm whether the existing building will remain occupied and operational during construction and identify any restrictions related to noise, vibration, dust, access, or utility interruptions impacting adjacent operations.

Government Response: The facility will remain occupied. Please see SOW para.

1.7 for bioenvironmental regulations.

64. Please clarify whether all required switchgear seismic anchorage engineering, stamped calculations, and equipment anchorage submittals are considered deferred delegated design responsibilities of the Contractor.

Government Response: Equipment anchorage is a deferred submittal per the General Notes on Sheet S-001.

65. Please clarify whether the Government will permit multiple planned outages or whether all demolition, replacement, testing, and re-energization activities must be completed within a single outage window.

Government Response: Multiple is acceptable if needed.

66. Please confirm whether factory witness testing or manufacturer-certified startup technicians are required for the new switchgear equipment.

Government Response: Refer to specifications sections 26 08 00 and 26 23 00 for information.

67. Please identify whether any proprietary Tinker AFB electrical standards, breaker settings standards, grounding standards, or naming conventions apply beyond those included in the contract documents.

Government Response: Tinker AFB electrical standards to be followed. However, drawings and specifications will come first then followed by the standards.

68. Please confirm whether the Contractor will be allowed to submit equivalent manufacturers for switchgear, breakers, and associated electrical distribution equipment and identify any approved manufacturers list or basis-of-design restrictions.

Government Response: If stated in the specs for that specific item then yes.

69. Please clarify responsibility for disposal, salvage, or Government retention of removed switchgear, breakers, transformers, conductors, and associated demolition materials.

Government Response: Plan for all items to be brought off site. There may be a chance the shops take some of the items listed and if that’s the case we can coordinate a turnover.

70. Please confirm whether hazardous energy control procedures, base-specific energized work permits, or Government electrical safety approvals are required prior to performing demolition or tie-in work.

Government Response: Outages will be requested by the contractor, but the shops will be de-energizing and energizing before and after the outage.

71. Please identify whether any existing equipment contains PCB-containing components, oil-filled devices, or other regulated materials requiring special handling/disposal procedures.

Government Response: None to our knowledge.

72. Please clarify whether all existing concrete pads, housekeeping pads, and structural support shown for reuse are structurally adequate for the new equipment weights and anchorage loads.

Government Response: Existing housekeeping pads are not to be reused but removed per Sheet SD101. New pads shown and existing concrete slab was reviewed for the Electrical Equipment indicated in the drawings.

73. Please confirm whether any communication, fire alarm, EMCS, BAS, monitoring, or remote annunciation systems are tied into the existing switchgear and identify Contractor responsibilities for maintaining or reconnecting these systems.

Government Response: There is not any of these systems has been identified as new and provided under this scope of work. Bid as indicated on Contract Document. No fire alarm devices are located in the existing switchgear nor are any intended for the new switchgear.

74. The SOW lists specifications for Div. 02, 03, 05, and 26. Will the GOV provide those specifications prior to bid date?

Government Response: These specifications listed can be ignored. The contractor will need to follow the IFC specifications located in the contractor CD.

75. Please confirm that this project will not require any QFPE/FPE services of any kind.

Government Response: No, a QFPE is not required for the project. However, it is incumbent on the contractor to maintain egress from the building as indicated on the life safety plan in the contract document set.

76. Drawing SD-101 includes Keynote #2, which states to remove existing concrete pads. During the site visit, we could not locate any concrete pads. The electrical equipment set directly on the concrete slab/dock. What is this note referring too? Please clarify.

Government Response: During the initial site walk from HDR in 2023 the screened in area contained (2) existing switchgears that appeared to be on housekeeping pads. If the pads do not exist, then this demolition scope can be omitted.

77. Drawing SD-101 includes Keynote #1 states to remove existing posts, including base plates and screens. Please confirm: a. Any embeds can be cut flush to the slab;

b. Any existing openings from prior screen fence posts can be left as is and Contractor is not responsible for filling/repairing.

Government Response: Yes. Refer to Keynote 2 on SD101 for back gouging requirements of post anchors.

Response B: Exposed holes from fence post anchors to be covered with grout per Keynote 2 on SD101.

78. The new fenced screen appears to be 6-FT from the west wall of Building 1.

There is currently a picnic table that will limit the pathway, but more importantly, a metal rack surfaced mounted to the concrete, existing mechanical piping, and windows that will impact installation of the fence screen in this place. How will the GOV handle these obstructions? Please note, they are not shown on the drawings currently.

Government Response: No new screens will need to be placed. Only removal of existing.. Refer to Contract Documents dated on 04/10/26

79. The existing fence screen is to be removed. However, the southwest post is embedded in the concrete slab. Please confirm that Contractor can cut this post flush to the slab.

Government Response: Post to be cut flush with existing concrete slab and filled with grout.

80. Please confirm that all existing piping, conduit, attachments, antennas, boxes, etc., that exist on the south wall or just off the south wall, west of the screen fence, are to remain as is in place.

Government Response: Refer to Contract Documents sealed and dated on 04/10/26

81. Please confirm that the Contractor will not be responsible for cleaning up the trash and debris, to include abandoned mechanical fittings and valves, that are within and around the jobsite area (screen-in fence area).

Government Response: The contractor will not be required to remove any trash or abandoned fitting/valves etc. They will only be responsible for their own debris.

82. Will the existing picnic tables north of the job area be removed by the end-user prior to construction?

Government Response: No response from the user. Plan to remove and set to the site if in the way of construction activities or equipment location.

83. Would the Contractor be able to close down the door southwest of the job area during construction? This would prevent end-users from walking out of that door and directly into an active jobsite.

Government Response: Yes, however please place signs to direct them to a different exit.

84. Many of the Government responses are “Bid as advertised. Conduct work in accordance with drawings and specifications sealed and dated on 04/10/26.”

However, the drawings provided to us are dated 04/17/2024.

Can the Government provide the drawings dated 04/10/26?

Government Response: Yes, An updated drawings will be provided and uploaded.

85. It was observed during another project that the feed to Panel B-9 is old cloth covered wire. If additional cloth covered wire is found on other loads, will these be required to be replaced with new wire, or allowed to be extended per E601 Key note 2 so long as they pass testing per NFPA 70?

Government Response: Allowed to be extended per E601, see revised IFC set for additional information.

86. The construction one-line diagram on RFP drawing E-601 shows a new 8-way 4”PVC duct bank (7 used, 1 spare) from the existing 1500 kVA OG&E transformer to the new 480//277V switchgear. What is the proposed routing of this duct bank?

Government Response: Refer to Contract Documents, sealed and dated on 04/10/26 for routing.

There is no routing in the contract documents, this could very much affect the pricing of this scope, can the government provide proposed routing so that it can be properly bid on?

Government Response: The Drawings document will be uploaded this week that should provide the routing.

86. If the watthour meter discussed in the previous comment is new, what is the desired location for that meter?

Government Response Coordinate with OG&E and Tinker Onsite team for additional information.

In the past, we as the contractor are not allowed to communicate with OG&E.

Also, who is the Tinker Onsite Team and how do we get this RFI to them for an adequate response?

Government Response: Tinkerone@oge.com is the universal contact for the on sight OG&E team.

Reliability Engineer

Desk: 405.553.4124

Cell: 303.669.3190

Email: fischetb@oge.com

Manager UG Network

& Tinker Operations

Office: 405-553-8339

Mobile: 405-605-9916 boyds@oge.com

The point of demarcation is the set of secondary lugs of the transformer. Therefore the meter is on the Government owned side. From the diagram it is directing the meter be “per TAFB Electrical Standards”. I believe that document will direct where to put the meter.

Of note, when connecting to the transformer with the secondary conductors, please contact OG&E as they will want to land the cables on the contractor provided lugs.