Rocky Mountain Underground, LLC Rocky Mountain Underground, LLC Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Division 33 - Utilities >> 33 00 00 Utilities Rocky Mountain Underground, LLC 3000 Landon Ln Ste 101Nampa, ID 83651 | View on Google Maps John Hilton (208) 400-3365 Visit Site Rocky Mountain Underground is a trenching and excavation company providing dry utility installations for private and commercial customers. Member Since: 2020 Send a message to: Rocky Mountain Underground, LLC Your Name: Your Email: Subject: Message: (Date: 8/11/2025)