- Removed existing CRACs and winterize for long-term storage
- Installed one new Liebert Dual Cool (Air-Cooled) system.
- Installed new electrical feeders and over-current protection devices from existing emergency electrical panel to new CRAC.
- Installed leak detection water sensor alarms.
- Maintained space temperature of 76 degrees Fahrenheit during all work
- Installed Lennox VRF system with two ceiling cassettes in second-floor server room.
- Installed Lennox VRF system with two ceiling cassettes in the cryogenic freezer room.
HVAC Backup for Server Room
The National Oceanic and Atmospheric Administration (NOAA) Southwest Fisheries Science Center (SWFSC) was constructed in 2014.
The facility contains 38 research laboratories, a library, conference rooms, and office space for 275 scientists and support staff. SWFSC provides scientific research to support the management and conservation of domestic and international living marine resources.
In 2017, NOAA funded the upgrade of existing computer room air conditioners (CRACs) in three locations. This upgrade was necessary to preserve critical functions during a potential catastrophic equipment failure or during periodic major preventative maintenance, so that in the event of a loss of chilled water the Dual Cooled Liebert would take over and provide uninterrupted mechanical cooling.
Lennox VRF (Variable Refrigerant Flow) mechanical cooling was also added to the cryogenic freezer room and a second server room to prevent overheating during a loss of chilled water.
Ahtna Global completed the following actions within an occupied building, while maintaining an optimal temperature and preventing downtime of the mission-critical facility.
Glacier Bay National Park
In an effort to accommodate more people, the NPS contracted Ahtna Global to perform park trail rehabilitations allowing visitors in wheelchairs to access the lodge’s front door.
Ahtna performed all work during the lodge’s off-season, ensuring minimal impact to operations.
The project consisted of the following activities:
- Demolition of existing concrete sidewalks/slabs and asphalt.
- Clearing and grubbing of sod.
- Excavation of unsuitable material and placement of classified fill to a specified grade verified by survey control.
- Constructing ADAAG/ABA compliant concrete sidewalks and ramps with integrated prefabricated trench drains.
- And installation of wood railings and wood pedestrian benches, including fabrication of all new stainless steel hardware.
In addition to the activities listed above, Ahtna also moved and extended an existing historic stairway and boardwalk to accommodate head height for visitors using the new ramp.
The Glacier Bay Lodge is of historical importance given the history of the building. As a result, Ahtna will be milling lumber to special dimensions to match the existing wood and historical appearance of the lodge.