US · FMCSA ACTIVE HAZMAT
GREAT SOUTHWESTERN CONSTRUCTION INC
Castle Rock, CO 80104 · DOT 290775
Company profile
Web-discovered · as of 2026-07-30
Castle Rock-based specialty contractor providing electrical construction services, including transmission lines and substations, often utilizing a private fleet for transport. It is a subsidiary of MYR Group.
Fleet use
Specialized service
Operating scope
Regional
Service model
dedicated, own account
Equipment
flatbed, specialized, lowboy
Ownership
Subsidiary
part of MYR Group
Employees
501-1000
Networks & associations
MYR Group
Industries served
utility constructionpower transmissiondistributionsubstation
HQ · 2155 Barker Court, Castle Rock, CO 80104
Active LinkedIn and company website listing current projects and hiring.
Registry record
Source FMCSA · as of 2026-08-01
Fleet size
314
power units · corroborated
Activity
road freight carrier
private licence
In operation since
1987
357 drivers
US compliance
Source FMCSA L&I / SAFER · as of 2026-07-12
Operating authority
None / private
Insurance on file
No
Out of service
No
Safety rating
CONDITIONAL
Crashes (24 mo)
4
0 fatal · 1 injured
Data Services
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