22_DENA_332037_Q_A_9_18_26_Amend_0004_0004.xlsx
XLSX spreadsheet 75 KB Posted
- Attached to
- DENA 332037 Eielson Roof Replacement
- Solicitation number
- 140P2026R0087
About this file
This is a Questions and Answers (Q&A) document for DENA 332037, Rehabilitation of the Eielson Visitor Center at Eielson Air Force Base, Alaska (Project Number 402002). The document contains 13 bidder questions with responses, posted September 18, 2026, addressing technical clarifications and scope ambiguities in the construction specifications and drawings.
Key technical clarifications include: the hydro alternator is existing to remain with scope limited to maintenance and modifications within the Power House; the final rectifier and charge controller architecture is discretionary for the System Designer, allowing either single or dual arrangements provided performance requirements are met; alternative equipment platforms are acceptable if they demonstrate documented Alaska-based service and support meeting specification intent regarding qualified technicians and parts availability; multi-wire branch circuit removal and replacement is included in base scope if present; contract line items and mold containment allowance are defined in Specification Section 01 27 00 with an allowance to be issued by amendment; the correct submittal list (dated July 20, 2026) will be provided by addendum and includes Division 26 sections; the existing electric unit heater in the utility building (fed from a 15/2 circuit breaker in Panel M) may be reused if compatible; caster-mounted battery support racks may be acceptable under repair/maintenance interpretation, but new Energy Storage Systems with altered specifications must comply with ICC IFC 2024 Article 1207 anchoring requirements; spare parts consist of principal conversion components rather than complete duplicate control panel assemblies; lighting fixture quantities should follow the fixture schedule on drawing E001; occupancy sensor timers shall be set per Specification 26 51 02 paragraph 3.1.C at 15 minutes for offices and 20 minutes for general use areas; and exterior CMU veneer shall match existing per architectural sheets and Section 04 81 00.
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Q&A posted 9.18.2026
| BIDDERS QUESTIONS | Design Alaska | |
| PROJECT: DENA 332037 Rehabilitation of the Eielson Visitor Center | PROJECT NUMBER: | 402002 |
| LOCATION: Eielson AFB, AK | PROJECT MANAGER: | MAJ |
| Bidding Questions No. | ||
| BIDDING QUESTIONS CLOSE DATE: |
# Date Rec'd Contractor Contractor Question Response
Jeff Putnam: Please describe what action was taken as a result of the ITR comment. If no action is to be taken answer the comment with an appropriate explanation.
| Addenda | |||
| No. or N | Response By | ||
| 1 | 10-Sep | Hydro alternator — replacement or retention? |
Specification 26 30 00 paragraph 1.5.A states that the existing photovoltaic array, hydro alternator, inverters and energy storage system shall be replaced with a new system. Paragraph 1.5.B of the same section states that the hydro system in its entirety is existing to remain. Drawing U001 note H states the hydro turbine and alternator are existing to remain and are to be restored to their original 120/240 VAC single-phase configuration.
| Please confirm that the hydro alternator is not being replaced and that the scope of Section 26 30 00 is limited to the conversion, storage, control and interconnection equipment. | The hydro alternator is existing to remain. The scope of work, for the hydro system, is limited to maintenance and modifications of the existing hydro equipment located within the Power House (See original drawings E1 on U002) and new equipment from the secondary side of the existing pad-mount transformer (see detail 2 / U001). | No | J. Leonelli | |
| 2 | 10-Sep | Rectifier and charge controller architecture? |
Drawing U001 states that rectification of 240 VAC produces approximately 340 VDC, which is beyond the typical rating of DC charge controllers, and directs that where the associated charge controllers cannot accommodate rectified 240 VAC the contractor is to provide dual systems for the A and B bus operating on a rectified 120 VAC line-to-neutral connection. The same sheet states that the design anticipates a DC charge controller for the A and B AC bus.
Please confirm whether offerors are to carry a single or a dual rectifier and charge controller arrangement at bid, or whether the final architecture is left to the offeror's System Designer. The distinction represents two UL508A control panel assemblies, two charge controllers and an additional panel engineering package. The final rectifier and charge controller architecture is at the discretion of the System Designer, provided the proposed design satisfies the overall performance and operational requirements of the project.
The AC voltage design is based on the existing pad-mounted transformers (refer to Keynotes 5 and 14 on Drawing E1, Sheet U001), which are rated 240:7200V. The hydro alternator and distribution system are configured for 120/240V, single-phase A/B operation. Operating at reduced voltage (120V) or modifying the system in a manner that eliminates a phase may reduce medium-voltage power transfer capability and increase transmission losses.
The intent of the design is to maximize power transfer efficiency while providing flexibility for the System Designer to accommodate equipment capabilities, system integration requirements, and existing project constraints. Accordingly, the Designer may propose either a single or dual rectifier and charge controller arrangement, as appropriate for the selected equipment and overall system design.
| However, it is not the intent of the design to omit a phase, utilize only half of the available waveform, or otherwise reduce system capability unless such configuration is required due to a demonstrated limitation of the proposed equipment and is supported by the System Designer's engineering justification | No | J. Leonelli | |
| 3 | 10-Sep | Manufacturer and service agency requirement, 26 30 00 paragraph 1.1.B |
Specification 26 30 00 paragraph 1.1.B requires that the manufacturer or their authorized distributor have an established agency that stocks a full complement of parts within the Alaska or Washington area, and that they offer the services of an Alaska-based technician.
| Please confirm whether an offeror proposing an alternative equipment platform, supported by a documented Alaska-based service agreement meeting the intent of paragraph 1.1.B, will be considered responsive — or whether the paragraph is intended to limit the selection to a specific manufacturer. | The specification is not intended to limit selection to a specific manufacturer. The intent of Paragraph 1.1.B is to ensure that the proposed equipment can be adequately supported by qualified service personnel who can be reasonably dispatched to the project site without significant delay or hardship. Similarly, the requirement for local stocking and distribution is intended to ensure that replacement parts and maintenance support are readily available through established local or regional contractors, distributors, or service providers. As such, alternative equipment platforms may be considered responsive provided they demonstrate a documented service and support arrangement that satisfies the intent of Paragraph 1.1.B, including timely access to qualified technicians and replacement parts. | No | J. Leonelli | |
| 4 | Multi-wire branch circuits in existing construction? |
Specification 26 05 19 paragraph 3.2.Q prohibits multi-wire branch circuits, requires dedicated neutral conductors, and does not permit handle-tied breakers as a substitute. Drawings E201 and E202 state that circuit assignments and homerun locations are based on the available 2005 as-built drawings and limited field investigation and may not match field conditions.
| In a facility of this vintage, existing branch circuits are likely to share neutral conductors. Please confirm whether the removal and replacement of such circuits, in order to comply with paragraph 3.2.Q, is included in the base scope of work or is to be addressed as a change under the contract. | Prescence of multi-wire branch circuits is unknown, but not anticipated based on homerun callouts in original 2005 asbuilts. See Addendum. | Yes | M. Krueger | |
| 5 | Contract line-item schedule and mold allowance? |
Section B of the solicitation lists six lump-sum contract line items numbered 0010 through 0060. Specification 01 27 00 defines seven contract line items numbered 0001 through 0007, including a contract line item 0007 for mold containment, remediation and clearance, with three offeror-priced unit prices to be drawn against a Government-stated allowance.
| Please confirm which schedule governs. If a mold containment allowance is intended, please issue the allowance amount and the unit price table by amendment. | Included in this Amendment 0002 | Yes | NPS | |
| 6 | Attachment 3, the Submittal List, is dated 12 June 2026, is titled Replace Roof at the Eielson Visitor Center under PMIS 227793, and lists no Division 26 section other than 26 27 26, 26 50 00 and 26 51 02. It does not include Section 26 30 00 or the 26 05 series. The submittal list bound within the specification package does include Section 26 30 00. | |||
| Please confirm which submittal register governs the contract. The difference is material, as Section 26 30 00 requires qualification submittals, professional engineer sealed shop drawings, product data, warranty documentation and operation and maintenance manuals. | Incorrect submittal list. Addendum to provide accurate submittal list dated July 20, 2026 | Yes | M. Jones | |
| 7 | Drawing U001 note K directs the contractor to investigate the existing electric unit heater labeled as LOAD SHED HEATER within the electrical room, and states that the contractor may utilize the existing unit heater with the new system. | |||
| Please identify the intended unit heater by location and provide its electrical rating. Suspended electric unit heaters are present in more than one room of the utility building and no unit is legibly labeled. | Note M is with reference to the equipment denoted as "Existing Electric Unit Heater" on detail 1/U101. All other suspended unit heaters within the utility building are observed as hydronic. The kW rating is unknown. It is fed from a 15/2 circuit breaker located within Panel M (located between MDP and Battery Banks). | No | J. Leonelli | |
| 8 | Specification 26 30 00 paragraph 1.3 requires conformance with ICC IFC 2024 Article 1207. Drawing U001 note D permits re-use of the existing battery support racks where compatible. The existing racks are mobile units mounted on casters. | |||
| Please confirm whether caster-mounted racks are acceptable for the new energy storage system, or whether the new installation is required to be positively anchored. | The design of the Energy Storage System (ESS) was coordinated with the Fire Marshal (FM) with the understanding that the project is intended to constitute a repair, replacement-in-kind, or maintenance upgrade of the existing battery system, which consists of approximately 115 kWh of lead-acid battery storage. |
Under this approach, the reuse of existing battery support equipment, including existing racks where compatible with the proposed battery system, may be acceptable as part of maintaining the project within the scope of a repair or maintenance effort. This philosophy extends to mounting and support arrangements, including the potential reuse of existing caster-mounted racks.
| However, any proposed ESS that changes the technology, capacity, configuration, layout, footprint, or other fundamental characteristics of the existing system may be considered a new installation rather than a repair or maintenance activity. In such cases, the system would be required to comply with all applicable current code requirements, including IFC 2024 Article 1207, as well as the listing, installation, anchorage, and manufacturer requirements associated with the proposed equipment. | No | J. Leonelli | |
| 9 | Specification 26 30 00 paragraph 2.2 requires as spare equipment one full rectifier or set of diodes, one hydro DC charge controller, and one DC-DC converter. The rectifier and the DC-DC converter are each specified elsewhere in the section as complete UL508A-listed control panel assemblies. | ||
| Please confirm whether the required spares are the conversion components alone or complete duplicate UL508A control panel assemblies. | The intent of the spare parts requirement is not to provide complete duplicate UL508A-listed control panel assemblies. Rather, the intent is to furnish spare major components that are critical to system operation and are anticipated to require replacement over the service life of the system due to failure, wear, or maintenance needs. |
Accordingly, the required spare rectifier (or set of diodes), hydro DC charge controller, and DC-DC converter should be interpreted as the principal conversion components themselves, not complete duplicate control panel assemblies, unless specifically required by the selected equipment manufacturer.
| The purpose of these spare components is to support timely maintenance and restoration of service at this remote site, particularly for items that may not be readily obtainable from manufacturers, distributors, suppliers, or parts inventories located within the State of Alaska. Readily available ancillary panel components, wiring, enclosures, and similar standard hardware are not intended to be duplicated as part of the spare equipment requirement. | No | J. Leonelli | |
| 10 | The Lighting Fixture Schedule on drawing E001 is presented across three sub-tables, and the fixture symbol counts shown on drawing E202 do not reconcile to every fixture tag in the schedule. | ||
| Please confirm the fixture tag to model assignments so that quantities can be verified prior to release for manufacture. | The lighting fixtures schedule header "Maintenance Building" should actually refer to the "Utility Building" (detial 2/E202). |
Sheet E202 has different veiws for the different areas corresponding to the lighting fixture schedule. IE, there are 22x A2 tags on sheet E202. The fixture schedule shows 9x A2 fixtures in the main building (Details 1 & 3 on E202) and 13x A2 fixtures in the Utility Building (Detail 2/E202), for a total of 22 A2 fixtures.
| Unless there are specific examples of large conflicts, then bid the counts as shown in the lighting fixtures schedule. | No | M. Krueger | |||||
| 11 | Specification 26 51 02 paragraph 3.1.C states that timers on occupancy sensors shall be set at 15 minutes for office spaces and 20 minutes for general use areas. Paragraph 3.3.E of the same section states that the occupancy sensor electronic timer shall be set to turn lights off 30 minutes after evacuation. Drawing E002 states that all occupancy and vacancy sensor timers shall be set to 20 minutes per ASHRAE 90.1. | ||||||
| Please direct which setting governs at commissioning. | Please follow paragraph 3.1.C. | No | M. Krueger | ||||
| 12 | Pages 2 through 6 of Section 26 30 00 carry the running header SECTION 12 36 00 — COUNTERTOPS. | ||||||
| Please confirm that Section 26 30 00 is complete as issued and that no content was omitted in assembly of the specification package. | The body of the specification is complete without any missing text. Only the header information is incorrect. | No | J. Leonelli | ||||
| 13 | Per drawing C-203 detail 2, can you please provide the type of veneer. | Type to match existing exterior CMU veneer per architectural sheets and 04 81 00 Unit Masonry Assemblies | No | M. Jones |
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