I also live in Utah and I sometimes see 3 SD40-2's switching cars or just o e GP15 and 2 SD59MX's switching cars there Bell sounds like from the 90s but I never heard a horn of any of them.
+California Rail Productions™ Back in the day, when I lived in Conrail Country, this was THE horn. UP had them in the '90s too and Santa Fe was another user.