US · FMCSA ACTIVE AUTHORITY INSURED HAZMAT
SIMON CONTRACTORS OF SOUTH DAKOTA INC
dba HILLS MATERIALS COMPANY
Rapid City, SD 57702 · DOT 1521310 · MC890875
Company profile
Web-discovered · as of 2026-07-30
Rapid City, SD-based heavy civil construction company producing asphalt, concrete, and aggregates. Operates as a subsidiary of Simon Contractors (Colas) and utilizes a private fleet for materials hauling in the region.
Fleet use
Private fleet
Operating scope
Regional
Service model
own account
Equipment
dump, specialized
Ownership
Subsidiary
part of Simon Contractors (Colas Group)
Employees
51-200
HQ · 1525 Concourse Dr, Rapid City, SD 57703
Active company website, active social media, and current career postings on parent company site as of July 2026.
Registry record
Source FMCSA · as of 2026-08-01
Fleet size
48
power units · corroborated
Activity
road freight carrier
for hire licence
In operation since
2006
55 drivers
US compliance
Source FMCSA L&I / SAFER · as of 2026-07-12
Operating authority
Active
Insurance on file
Yes (BIPD)
min cover $1,000k
Out of service
No
Safety rating
UNRATED
Crashes (24 mo)
1
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