The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

Yucca Mountain GPS Network - HELL-Hell's Gate P.S.
Start: 28-Jul-2006
End: 21-Jan-2010
Davis, James, 2006, Yucca Mountain GPS Network - HELL-Hell's Gate P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5222SF7