NIXCAVATING, Inc. Share: Excavation NIXCAVATING, Inc. Visit Website Request Info 1821 Boston Avenue PO Box 2232 Longmont, CO 80502 303-776-8898 303-776-8669 (fax) www.nixcavating.com About Map About Quality construction services-excavating, grading, utilities, sewer and water repairs for commercial and residential. What's Nearby? Distance: 5 10 15 20 25 50 mi.