National Heavy Civil Infrastructure & Energy Services Contractor
Turnkey Civil Solutions Built on Consistency, Honesty, and Integrity.
D. Grimm, Inc. delivers specialized heavy civil construction, precision foundation drilling, and comprehensive land development for utility, power generation, industrial, and infrastructure projects across the United States. Originally founded in 2000 by Dawn (Grimm) Harvey, our firm has scaled into a formidable multi-state infrastructure partner employing between 85 and 100 highly skilled personnel. We actively operate across two dedicated divisions—Energy Services and Land Development— collaborating seamlessly with utilities, project managers, and tier-one EPC contractors to execute complex civil scopes ranging from $200,000 to $3.5 million. At D. Grimm, we function as a true partner for real-world problem-solving.
Trusted by Tier-One EPC Contractors & Substation Developers
We regularly self-perform heavy civil scopes, foundation drilling, and right-of-way management as an approved, certified specialized subcontractor for the industry’s leading infrastructure giants
Why We’re Different
About D. Grimm, Inc.
Our Goals
We are committed to becoming the premier choice for safe civil solutions. We emphasize trust, loyalty and ethical business solutions.
Our Team
Our office is staffed with experienced professionals and industry experts who work well with clients to fulfill their needs.
Our Priority
Our highest priority at D. Grimm, Inc is to provide the safest environment, equipment, employees, and practices.
Certified Supplier Diversity
D. Grimm is officially certified as a Women-Owned Business Enterprise (WBE) and a Historically Underutilized Business (HUB). This dual status provides prime contractors with a distinct advantage in meeting mandatory federal and corporate supplier diversity procurement quotas.
IRA Labor Compliance
We manage an active, registered government apprenticeship program. This strategic initiative guarantees absolute adherence to Davis-Bacon prevailing wage regulations, ensuring seamless compliance on federally subsidized energy developments under the Inflation Reduction Act (IRA).
Elite Safety Infrastructure
We employ full-time safety professionals, with our lead safety director fully certified to teach specialized OSHA 30 courses. Our field crews maintain a zero-incident culture with documented expertise in executing high-risk civil tie-ins within energized, high-voltage substation environments.
Mitigating Commissioning Bottlenecks: The "First-In, Last-Out" Workflow
Substation and transmission line environments face chronic delays due to multi-trade coordination failures and schedule compression. To eliminate these scope gaps for prime EPC project managers, D. Grimm utilizes a proprietary, vertically integrated civil workflow
1: PRECISION ENGINEERING (First In)
Our expert teams commence projects with meticulous planning and execution, ensuring foundational elements are set with precision.
2: Structural SPACE OPERABILITY
If needed, D. Grimm temporarily vacates the site, providing unhindered access for other civil contractors.
3. Turnkey Close-Out (Last-Out)
Once primary work is completed, our teams return to execute full close-out services, including top rock application, security fence repair, and complete right-of-way site restoration, and finish the job.
Turnkey Infrastructure Operations
At D. Grimm, Inc., we specialize in delivering comprehensive infrastructure solutions tailored to meet the unique demands of the energy and land development sectors. Our expertise ensures seamless project execution from planning to completion, ensuring reliability and efficiency every step of the way.
Energy Services Division
Substation Civil Construction
Complete site preparation, mass grading, precision rock excavation, pad building, and grounding grid installation.
Foundation & Concrete Construction (Below-Grade)
Precision below-grade concrete, drilled foundations, utility footers, and reinforced structural support systems built for long-term durability.
Transmission Line Civil Work
Linear infrastructure support providing access road development, tower pad grading, SWPPP, and structural pier installation across hundreds of miles.
Underground Utilities Installation
Professional installation of underground water, sewer, sanitary, conduit/grounding, and utility systems for commercial, industrial, and infrastructure developments.
Land Development Division
Land Clearing and Grubbing
Efficient vegetation removal, ROW clearing, and site preparation services for utility, industrial, and energy construction projects.
Site Development, Earthwork, & SWPPP
Comprehensive excavation, site stabilization, and Stormwater Pollution Prevention Plan (SWPPP) implementation to mitigate regulatory erosion liabilities.
Drilling Operations
Specialized drilling services including transmission line foundations, substation piers, rock drilling, and large-diameter utility foundation systems.
Where D.Grimm Operates
Core Regional Operating Hubs
Our teams possess deep regional expertise, heavy-duty equipment fleets (including high-performance Komatsu PC360 excavators), and specialized drilling rigs capable of conquering the most hostile geological and climatic environments in the Southwest.
Texas Operations
Headquartered in Navasota, we serve major energy hubs across Houston, Dallas/Fort Worth, Austin, San Antonio, and the Gulf Coast. Our Texas teams specialize in mitigating the extreme volumetric stress of Central Texas black gumbo clay and handling complex coastal site preparation.
Arizona Operations
Delivering turnkey substation sitework and foundation drilling across Phoenix, Tucson, Mesa, and Flagstaff. Our Arizona crews specialize in deep rock drilling through caliche and volcanic basalt, alongside strict Maricopa County dust controls and summer concrete thermal tracking.
New Mexico Operations
Providing remote logistical mastery and deep drilled foundations across Albuquerque, Santa Fe, Las Cruces, and Roswell. We regularly navigate high-resistivity soil grounding preparation and strict Bureau of Land Management (BLM) right-of-way compliance.
Nationwide Travel Capabilities
D. Grimm maintains active licensing and mobilization capabilities across Oklahoma, Arkansas, Louisiana, and Mississippi. We have the corporate maturity to travel and coordinate state-specific permitting, environmental compliance, and rapid multi-jurisdictional mobilization anywhere across the United States.
Our Gallery
Check out our most recent projects
Testimonials
What Our Clients Say
From 2015 to 2019, D. Grimm, Inc. has built many projects for my team – ranging in value from 200K to 3.5MM – including substation construction involving clearing, site preparation, SWPPP, grading, rock excavation, imported fill, fencing, and final surfacing.
D. Grimm, Inc. has always been dependable, thorough, and professional in their service operations. Beyond this, no matter what the schedule may be, safety and quality are always a priority that is
incorporated into their work.
As a Project Manager, D. Grimm, Inc. is always welcome on my jobs and come highly recommended by
Dashiell to our customers.
On behalf of Burns & McDonnell, I would like to express our sincere gratitude for your outstanding performance at Sitgreaves Switchyard. Your team’s unwavering dedication to project success, consistent high quality of work, and exemplary commitment to safety have been truly exceptional throughout this project.
We particularly appreciate your team’s efficient planning and problem-solving techniques. We value when our partners not only coming to us with problems, but also a complementary cost-effective solution. That’s what we can expect when working with D.Grimm.
Your team sets a high standard for all our subcontractors.
We value your partnership and look forward to the next one.
Partner with an Absolute Industry Standard
Whether you are trying to satisfy strict federal diversity quotas with a certified WBE/HUB partner, secure audited compliance for an IRA-subsidized build, or safely execute heavy civil scopes in complex subsurface environments, D. Grimm, Inc. is equipped to mobilize.
Headquarters
D.Grimm is located in Navasota, TX. We work in Texas, New Mexico, Arizona, and across the US.
Phone
FAQs
Discover answers to common questions about substation site preparation, grading importance, fencing installation, and the unique aspects of civil construction for substations. Our expertise ensures your project is handled with precision and care.
What types of services does D. Grimm provide?
We provide civil construction services including substation civil construction, transmission line sitework, drilling operations, underground utilities installation, land clearing, grading, earthwork, erosion control, SWPPP, and below-grade concrete construction.
Why is grading and grubbing important for substations?
Substation grading and grubbing ensures proper drainage, removes organic material that could compromise stability, and creates a level base for critical infrastructure.
Does D. Grimm travel for projects outside of its primary service areas?
Yes. While we regularly work throughout Texas, Arizona, and New Mexico, we are willing to travel nationwide and can coordinate additional permits and regulatory requirements as needed. We also have extensive experience in Oklahoma, Arkansas, Mississippi, and Louisiana and can get registered and licensed as other states require.