Crystal Communications (Monument/Mission Peak)
From The RadioReference Wiki
=The following frequencies were confirmed to be still in use on 11/14/2009:
LCN 09 483.6875 LCN 10 489.3875 LCN 12 490.0125 LCN 17 490.9875
All four are used by Freeway Service Patrol (FSP) Monument talkgroup 0-12-208.