Updated: Jul 07, 2026
Location and Projects
Address
PO Box 849, Castle Rock, CO, 80104
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Great Southwestern Construction, Inc
Great Southwestern Construction, Inc., based in Castle Rock, Colorado, specializes in large-scale electrical infrastructure projects across the region. As a subsidiary of MYR Group, the company brings three decades of experience in electrical construction, delivering transmission, distribution, and industrial electrical services. Its portfolio includes some of the most notable civil and electrical infrastructure projects managed by MYR Group companies throughout the United States and Canada. The company is equipped to support clean energy transformation initiatives, providing comprehensive solutions tailored to evolving industry needs. With access to the resources and expertise of a multi-state network, Great Southwestern Construction serves a range of commercial and industrial clients requiring complex and sustainable electrical systems.
Great Southwestern Construction, Inc Services
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Great Southwestern Construction, Inc Contact Information
Address: PO Box 849, Castle Rock, CO 80104
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Building Permits by Great Southwestern Construction, Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Excavation, concrete pad, retaining wall & new rear fence to expand current substation layout.
Valuation:
$496,839
Permit #:
B2015-0104
Status:
final
Fee:
N/A
Permit Type:
Addition / Remode...
Building Type:
N/A
Oil & gas processing facility - natural gas liquids pipeline pump station - 48 sf pre-fab steel building on concrete slab - for switchyard electrical control building #2 - electric included -buckingham pump station - overland pass pipeline - usr12-0028 - ref: mfg12-00069 mfg12-00070 grd12-00033 olg12-00506 olg12-00508 olg13-00155
Valuation:
$32,675
Permit #:
OLG13-00156
Status:
final
Fee:
$890
Permit Type:
N/A
Building Type:
N/A
Oil & gas processing facility - natural gas liquids pipeline pump station - 48 sf pre-fab steel building on concrete slab - for substation electrical control building #1 - electric included - buckingham pump station - overland pass pipeline - usr12-0028 - ref: mfg12-00069 mfg12-00070 grd12-00033 olg12-00506 olg12-00508 olg13-00156
Valuation:
$32,675
Permit #:
OLG13-00155
Status:
final
Fee:
$890
Permit Type:
N/A
Building Type:
N/A
24x60 phoenix modular office trailer - 2006 blk/tied - bottled water & port-a-potty - for temp construction trailer - cedar creek wind project transmission line - usr-1562 11/29/06 - cdot verified access and row width (lin) 12/11/06 lighting designs now doing electrical work (bjm)
Valuation:
N/A
Permit #:
PRN-063065
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Road closure of kentucky east of wadsworth for placement of main power transformer at the xcel sub-station at 898 s. wadsworth blvd.
Valuation:
$0
Permit #:
PW*1302517*1
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Excavation & grading permit - 17, 000 cu yds of fill dirt for site preparation & remove 3, 000 cu yds of unsuitable material - includes erosion control & seeding & finish rock - erie substation expansion - tri state generation - usr-1702 - bcr09-00765 - demolish 2 metal utility buildings - 11/5/09 - ok to release per clay kimmi/pw & kim (lin) - 1/7/10 - address corrected to 5056 cr 6 ... see more
Valuation:
N/A
Permit #:
GRD09-00021
Status:
final
Fee:
$391
Permit Type:
N/A
Building Type:
N/A
Au - garage
Valuation:
N/A
Permit #:
19-11808
Status:
plancheck
Fee:
N/A
Permit Type:
New
Building Type:
Accessory use
Cm - commercial
Valuation:
$80,000
Permit #:
96-3962
Status:
issued
Fee:
$1,307
Permit Type:
New
Building Type:
Commercial
Commercial
Valuation:
$75,000
Permit #:
01-5040
Status:
Voided
Fee:
$1,245
Permit Type:
Commercial
Building Type:
N/A
Substation control building
Valuation:
N/A
Permit #:
104235
Status:
final
Fee:
N/A
Permit Type:
C-7 industrial/comm
Building Type:
N/A
Concrete pier foundations for towers and slabs for alma substation
Valuation:
N/A
Permit #:
06BLD-00000-00381
Status:
applied
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Commercial alteration remodel renovation
2008-02-08
07-l-231
Valuation:
$200,000
Permit #:
6228
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2002-COMMCON-0003005528
Status:
approved
Fee:
$84
Permit Type:
N/A
Building Type:
N/A
Const. power for sub station
Valuation:
N/A
Permit #:
11-00512
Status:
expired
Fee:
N/A
Permit Type:
Emp
Building Type:
N/A
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Great Southwestern Construction, Inc License info
Verified License
| License # | A96345 |
| Status | Active |
| County | Douglas County |
| Type | General A |
- BuildZoom verified this license was active as of October 2025.
Verify this license's status for Great Southwestern Construction, Inc at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | EC.0006488 |
| Status | Active |
| State | Colorado |
| Type | Electrical Contractor |
- When BuildZoom last verified this license, it had an expiration date of September, 2017. Check the current license status of Great Southwestern Construction, Inc with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 6488 |
| Status | Inactive |
| State | Colorado |
| Type | Electrical Contractor |
- According to the Colorado Division of Professions and Occupations, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Great Southwestern Construction, Inc at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | American States Insurance Company |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | American Zurich Insurance Company |
12
Permits
- Building permit records show that Great Southwestern Construction, Inc has worked on 12 permitted projects.
Great Southwestern Construction, Inc Employees
GI
Great Southwestern Construction Inc.
RP
Robert F Agnew President
Owner