B35 Critical Loop RFIs Current as of 26Feb26.xlsx
XLSX spreadsheet 11 KB Posted
- Attached to
- B35 Critical Loop
- Solicitation number
- W50S7X26QA001
- Issued by
-
Department of the Army National Guard
About this file
This file is a Questions and Answers document containing 13 RFI responses related to the B35 Critical Loop electrical installation project. The document addresses critical clarifications regarding the scope of work, materials, and installation specifications for contractors bidding on this Kansas National Guard solicitation.
Key technical specifications confirmed include: the linear distance of approximately 35 feet between the transformer room and the Automatic Transfer Switch (ATS) in the communication room; a requirement for a new (not refurbished) medium voltage transformer to be provided by the contractor; 15KV #2 cable with tape shield (not concentric neutral) that requires VLF testing; a transformer pad constructed of 4000 psi reinforced concrete, minimum 4 inches thick, with soil compacted to 95% density; and a 200-amp disconnect for the communication room. The contractor must perform core drilling for new vault openings as no existing sleeves are available. Regarding routing, the specific cable route will be determined by the contractor rather than following assumed lines on drawings. Boring is required only under existing roads, sidewalks, and concrete pads, with hydrovac trenching permitted in open grassy areas where conduit must be encased in 4000 psi concrete. The transformer color should be brown if available but is not required. A tax-exempt certificate will be issued for the project, and painter preference for the transformer is brown but not mandatory.
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Text version
Sheet1
| B35 Critical Loop Request for Information | ||
| Question | Answer | |
| 1 | Could you please provide us with the distance between the transformer room and the Automatic Transfer Switch (ATS) installed within the communication room? | The linear distance is approximately 35’ |
| 2 | Kindly provide the total connected load for the communication room in order to determine the required cable cross-sectional area from the transformer secondary terminals to the Automatic Transfer Switch. | Requires a 200A disconnect |
| 3 | New MV XFMRs usually have a very lengthy lead time. Are we able to provide refurbished MV XFMRs? I have installed these in the past with other applications. These refurbished XFMRs usually come with a longer warranty than new manufactured ones and also go through strenuous tests. Please let me know if providing refurbished XFMRs will be acceptable? | New is required. |
| 4 | Can as/built or record drawings of the existing vault be provided? We are interested in seeing if there are existing sleeves that can be used for new wiring, or if core drilling new openings into the existing vault will be required. | Core drilling will be required. |
| 5 | Typically encased electrical lines can only be accomplished via open trenching, not horizontal boring. Can the concrete encasing be eliminated from the SOW? | Boring will only be required under existing roads, sidewalks, concrete pads, etc. Hydrovac trenching may be utilized in open grassy areas. In areas where hydrovac trenching takes place, conduit to be encased in 4000 psi concrete. |
| 6 | Page 1 of the drawings provided illustrates a red line (COA #1) which we assume is the intended route for the new cabling. Please confirm. | Specific route to be determined by the contractor. |
| 7 | Page 2 and 3 of the drawings provided illustrates a blue line (COA #2), and a green line (COA #3) which we assume are not part of this work scope. Please confirm. | That is correct |
| 8 | Is the new proposed transformer provided by the contractor or gov't? | Transformer to be provided by the contractor. |
| 9 | Is there a requirement for the type of transformer pad? | 4000 psi reinforced concrete, minimum 4” thick, with the soil beneath compacted to 95% density. |
| 10 | Will there be a tax-exempt certificate issued for this project? | Yes |
| 11 | Is 15KV #2 Cable to be tape shield or concentric neutral? | Tape shield |
| 12 | Does the 15KV cable need to be VLF tested? | Yes |
| 13 | Will the transformer need to be painted McConnell Brown? | Brown is preferred but not required. |
File details come from the government source that posted it. Updated .