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

Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S.
Start: 24-Jul-1997
End: 14-Nov-2022
UNAVCO Community, Davis, James, 1998, Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5H130CW

Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S.
Start: 03-Dec-2004
End: 14-Nov-2022
UNAVCO Community, 1998, Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5MS3R3X

Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S.
Start: 24-Jul-1997
End: 03-Dec-2004
Davis, James, 1998, Northern Basin and Range GPS Network - SLID-Slide Mnt. P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5CC0Z12