Libby Dam DC Powerhouse Boards and Breakers, Libby, MT.

FOR INFORMATION ONLY:

This Pre-Solicitation Notice is ONLY A NOTIFICATION that a solicitation is anticipated and forthcoming. All questions regarding this Pre-Solicitation notice should be submitted in writing via email to Point of Contact(s) indicated below.

Construction Project:

Libby Dam DC Powerhouse Boards and Breakers, Libby, MT.
 

Libby Dam was completed in 1973. Units 1 through 4 were placed into service in 1976. Installation of unit 5 was approved by congress in 1980 and placed into service in 1985. The station service battery was replaced in 2012 and will not be replaced. The DC lighting system was replaced in 2013. Currently, Station Battery (SB) DC Boards both 24/48 volt (V) and 125V cannot be taken down for maintenance due to the critical nature of the loads. Standard practice to date for both plant personnel and contractors has been to perform work/maintenance while the panels have been energized. Performing work on energized systems has significant electrocution and/or arc flash risk. An event of this type would significantly damage critical plant equipment causing the project to lose control of plant power production. In addition, the age of the panels makes getting replacement parts including replacement breakers difficult. This increases the risk of prolonged system outages of critical plant equipment. The purpose of the project is to upgrade electrical systems to reduce safety risks and improve system reliability.

The following DC and Preferred AC scope of work includes:

125VDC System

• The existing battery switchboard will be replaced with two redundant battery switchboards.

• The battery chargers will be replaced with higher capacity chargers (400A).

• The 125VDC load centers will be replaced.

24/48VDC System

• The 24/48VDC switchboard will be removed and replaced with an enclosure to house the 125V main battery breaker and load bank connection.

• The new 125VDC system will be used to feed the 24/48VDC loads through two new DC/DC converters.

Preferred AC System

• The existing inverter will be replaced, and a redundant inverter will be added to feed the powerhouse preferred AC system.

• Manual bypass switches are to be added to bypass the inverters

• CHO will be removed and replaced with two new redundant switchboards.

• A redundant bypass transformer and two external manual bypass switches will be added at the CHO panels to increase system robustness.

• AC load panels will be replaced and an additional panel will be added.

Battery Room Modification

• Due to inadequate space in the Preferred AC equipment room for new equipment installation, after the removal of the 24/48VDC battery in the battery room, a new pre-fabricated, nonstructural wall, separating the space containing the 125VDC battery from the space containing 24/48VDC battery, will be erected. This will create an additional room to house new DC and preferred AC equipment.

• Install a fireproof door to allow access to the 125VDC battery room

• Install new ductwork in the battery room to meet ventilation requirements

Expected magnitude of construction is between $1 million and $5 million.

Solicitation number W912DW22R0036 will be posted to the Sam.Gov site, on or about 05 Jan 2022. The solicitation will be a Request for Proposals (RFP). Proposals will be due no sooner than 30 calendar days after actual solicitation issuance date. See the solicitation for details about proposal due date. The NAICS code for this procurement is 335313, and the associated small business size standard is 1,250 employees.

The solicitation documents for this requirement will be issued in electronic format only and will be made available online via the Sam.Gov website under the subject solicitation number. NO CD's OR HARD COPIES WILL BE AVAILABLE. Offerors are responsible for checking for any update(s) to the Notice/Solicitation. The Government is not responsible for any loss of Internet connectivity or for a offeror's inability to access the document(s) posted at the referenced website. To obtain automatic notifications of updates to this notice, log in to Sam.Gov and add the solicitation to your Watchlist.

The Response Date listed elsewhere in this pre-solicitation notice is for Sam.Gov archive purposes only. It may have no relationship to the actual solicitation due date. The solicitation due date and time will be contained in the solicitation and any solicitation amendments that are issued.

IMPORTANT NOTICE:

All contractors proposing on Department of Defense (DoD) solicitations must be registered in the System for Award Management (SAM) database prior to award of a contract. The purpose of this database is to provide basic business information and capabilities to the Government. The SAM website can be accessed at www.sam.gov. Contractors are encouraged to register as soon as possible. All new contracts can be made ONLY to contractors who are registered in SAM. This requirement applies to all DoD contract awards.

Contracting Office Address:

Attn: CENWS-CTC

PO Box 3755

Seattle, Washington 98124-3755

United States