From the first array crossing to the bore into the point of interconnection, we self-perform the underground work your COD depends on. Owner-operated rigs. One responsible party.
RMDT Utilities installs the entire underground scope on a utility-scale solar field. We bore HDD crossings under roads, rail, rivers, wetlands, and existing utilities; install 34.5kV medium-voltage collection as duct banks and conduit with fiber and SCADA; drill the interconnection and gen-tie bores into the POI, substation, and switchyard; and run vacuum excavation and SUE to daylight what is already in the ground. One owner-operated crew, accountable end to end.
Four capabilities, one crew. Each runs on owner-operated equipment, so the bore on your critical path never waits on a sub to mobilize.
Roads, rail, rivers, streams, wetlands, sensitive ground, and existing utilities, bored without disturbing the surface above.
Duct banks, conduit, and fiber / SCADA pathways tying the array back to the substation.
The bore into the POI, substation, and switchyard, the crossing that gates energization.
Daylighting and locating existing utilities before the bore.
Our rigs, our crews, no single financed drill rig holding up the schedule.
Bores delivered without holding up COD across 12 utility-scale solar fields.
The underground scope on a solar field is a sequence, not a pile of unrelated tasks. Each capability hands off to the next, and a gap at any interface shows up as a schedule slip at the end. We run the sequence as one crew so the handoffs happen inside one company instead of across a contract boundary.
Before any rig moves, we vacuum-excavate to pothole and daylight existing utilities along the alignment, in line with the one-call damage-prevention practices the industry relies on. Records are a starting point, not the truth. We verify depth and position, then design the bore path around what is actually there. That up-front read is what keeps a bore from finding a line nobody mapped.
As civil opens the site, we bore the access-road and array crossings that open-cut cannot touch: live roads, rail, drainage, wetlands, and sensitive ground. Boring keeps the surface intact and keeps the crossing off the permit and restoration path that an open trench would put it on.
With the crossings in, we install the 34.5kV medium-voltage collection, the duct banks and conduit that carry the array back to the substation, plus the fiber and SCADA pathways that ride alongside. Collection ties the field together electrically and sets up the final tie-in.
The last and most schedule-critical bore is the interconnection or gen-tie crossing into the point of interconnection, substation, or switchyard. This is the bore that gates energization. It often crosses the busiest, most constrained ground on the project, and it is the one you least want a new sub mobilizing for at the eleventh hour.
The bore is on the critical path. We make sure it never holds up your COD.
Split this scope across separate subs and every handoff becomes an interface: a locate that does not match the bore plan, a duct bank that lands off the conduit schedule, a gen-tie crossing that waits on a rig from a third company. Each interface is a place for the schedule to leak. Running the full underground scope with owner-operated rigs and crews collapses those interfaces into one responsible party. One company reads the geotech, runs the fluid program, owns the inadvertent-return plan, and answers for the schedule. That is the whole point.
| Scope | What it crosses | Why HDD |
|---|---|---|
| Access-road & array crossings | Live roads, rail, drainage, wetlands, sensitive ground | Keeps the surface intact and off the permit / restoration path |
| 34.5kV MV collection | Internal roads, ditches, and existing utilities between strings | Conduit and duct banks placed with trenchless methods open the whole field |
| Interconnection / gen-tie | The POI, substation fence line, switchyard, and major utilities | The energization-gating crossing, bored cleanly on constrained ground |
| Vacuum excavation / SUE | Records-only or congested existing utilities | Daylights and verifies lines before the bore, not after a strike |
Want the offering laid out for procurement? See our utility-scale solar page, or send your alignment and we will return a bore-by-bore plan tied to your COD.
Each capability has its own page with methods, planning, and the controls we run on it.
HDD crossings under roads, rail, rivers, wetlands, sensitive ground, and existing utilities, with a written inadvertent-return plan on every bore.
Explore →34.5kV duct banks, conduit, and fiber / SCADA pathways tying the array back to the substation across the field.
Explore →The gen-tie crossing into the POI, substation, and switchyard, the bore that gates energization, delivered on schedule.
Explore →Owner-operated rigs plus vacuum excavation and SUE to pothole, daylight, and verify utilities before we drill.
Explore →Bore it when open-cut is blocked or restricted: live roads and rail, rivers, streams, wetlands, sensitive ground, and existing utilities you cannot expose. HDD keeps the surface intact, avoids permit-heavy disturbance, and protects what is below grade. On clean, open ground with no obstruction, open-cut trenching is often faster and cheaper.
Yes. We self-perform HDD crossings, 34.5kV collection duct banks and conduit, interconnection and gen-tie bores, and vacuum excavation with owner-operated rigs and crews. One responsible party across the underground scope removes interface gaps between subs and gives you a single point of accountability for schedule.
Every bore runs against a written inadvertent-return plan: a geotech read of the formation, an engineered drilling-fluid program, active annular-pressure and return monitoring, containment staged on site, and a contingency response in writing. The plan is sized to the crossing before the rig moves, so a frac-out is contained, not a schedule event.
Yes. We vacuum-excavate to pothole and daylight existing utilities, verify depth and alignment, and feed that data into the bore path before drilling. Subsurface utility engineering up front is how we keep a bore from finding a line the records missed.
Send the civil and electrical alignment, crossing list with lengths and obstacles, any geotech or boring logs, the collection one-line and conduit schedule, the POI and interconnection requirements, and your COD milestones. We return a bore-by-bore plan, fluid and containment approach, and a schedule tied to your energization date.
Our crossings are planned and executed to the standards and damage-prevention practices the underground-utility industry relies on. Useful references:
Send your alignment, crossing list, and COD. We return a bore-by-bore plan and a schedule built to hit it.
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