Gas carrier under US-36 at Boulder
CDOT bore-and-jack with steel casing — traffic-adjacent staging with MOT plan and night window options.
Boulder, CO · Boulder County
Auger Boring / Jack & Bore in Boulder, CO
Auger boring in Boulder for gravity sewer and gas carrier crossings under US-36 and Boulder Creek corridor — straight cased pushes through Boulder County clay and DG.
Auger Boring / Jack & Bore in Boulder, Colorado
Auger boring in Boulder drives steel casing for gravity sewer, gas carrier pipe, and drainage conduit under US-36, 28th Street, and Boulder Creek outfall structures without disturbing embankments. Boulder County clay on east grids runs predictably through auger heads — decomposed granite on Mapleton Hill and Chautauqua approaches requires hard-face auger tooling and torque planning.
CDOT US-36 templates specify bore-and-jack for active utility crossings — engineered submittal, casing diameter, and annular grouting specs scoped upfront. Boulder Creek floodplain and open-space adjacency add environmental review layers on creek-crossing alignments.
CU campus subsurface infrastructure hidden in century-old fill under east campus may require pre-bore vacuum excavation grid before casing enters ground.
Boulder projects
Local Auger Boring / Jack & Bore Scenarios
Real Boulder County angles — not generic statewide copy.
Gravity sewer under Boulder Creek corridor road
Grade-controlled bore with open-space and floodplain permits — DG cobble tooling west of the creek.
Drainage crossing under 28th Street
Boulder County clay — auger bore maintains grade for storm outfall through urban corridor.
CU campus subsurface crossing
Pre-bore vacuum pothole grid on east campus before casing enters century-old fill.
How Auger Boring / Jack & Bore Works in Boulder
Boulder auger boring starts with CDOT or city ROW confirmation and 811 clear. Clay east grids run predictably — DG west-side shots need hard-face head and advance torque limit set. Grade laser-set before launch pit opens. CU campus and creek-corridor work carry additional coordination.
Soil & Geology — Boulder County
Boulder County clay, decomposed granite toward the foothills, and Boulder Creek alluvium — bedrock exposure on Mapleton Hill and Chautauqua approaches.
Boulder bores hit clay on east grids, decomposed granite and cobble toward Mapleton Hill and Chautauqua, and Boulder Creek alluvium near the corridor. Bedrock knolls on upper west-side lots require specialized tooling. CU campus may hide century-old utility conflicts in compacted urban fill.
Weather & Scheduling
Foothills hail, chinook winds, and rapid elevation shifts push Boulder crews to plan lightning holds and winter freeze-thaw on west-side residential shots.
Winter freeze-thaw at Boulder's elevation affects clay heave and pit access. Spring Boulder Creek runoff raises groundwater on west-side alignments. Summer lightning holds on exposed foothill pads are standard. We plan seasonal windows with your project calendar.
811 Locates & Permits in Boulder
City of Boulder Utilities, Boulder County ROW, CDOT US-36 relocations, Boulder Creek floodplain and open space adjacency on many paths.
City of Boulder Utilities and Transportation handle permits; county ROW applies on edges. CDOT US-36 controls state corridor bores. Boulder Creek floodplain and open-space adjacency may require parks department coordination. Historic district review can affect pit placement on The Hill and Mapleton Hill.
Trenchless vs Open-Cut Here
US-36 cutting is a CDOT non-starter for active utility crossings — bore-and-jack required. Open-cut fits east-side Boulder grids away from historic district where grade tolerance and staging room exist.
Casing size, drive length, pit depth, groundwater, rail or highway flagging, and welding inspection.
How we work
Our Process for Boulder Auger Boring / Jack & Bore
Scope & Site Walk
You share plans or describe the problem; we confirm alignment, depth, access, and which trenchless method fits Colorado soils.
811 Ticket & Marks
Colorado 811 ticket filed; wait period before pits open unless your permit path differs. We pothole where marks conflict.
Profile & Permits
Bore plan, CDOT or city ROW permits, railroad agreements, and crossing engineering when the path leaves private property.
Rig Mobilization
Compact spread for tight Boulder lots; larger HDD for I-25 or I-70 relocations — matched to length and diameter.
Pilot & Ream
Steered pilot on design line, ream passes sized for your pipe or casing, fluid program tuned for clay or sandstone.
Pullback & Install
HDPE fusion, steel casing, or multi-duct bundle pulled with tension and bend-radius monitoring.
Test & As-Built
Pressure test, mandrel, or survey records for owners, inspectors, and operators as spec requires.
Restore & Closeout
Compact pits, replace sod or hardscape per scope, leave 811 ticket and locate map in your project file.
FAQ
Auger Boring / Jack & Bore in Boulder — FAQ
When is auger boring required vs. open-cut in Boulder?
CDOT US-36 templates require bore-and-jack for active crossings. Boulder Creek open-space adjacency also favors cased bores.
Can you bore through decomposed granite near Chautauqua?
Yes — hard-face auger heads and reduced advance rates for DG runs.
Do you handle CDOT permit submittals for US-36 Boulder?
Yes — engineered submittal, inspection coordination, documentation.
CU campus bore-and-jack work?
Yes — with owner coordination and inspection hold points.
Do you mobilize to Lafayette and Louisville from Boulder?
Yes — Boulder County mobilization.
Directional Boring Colorado
Free Auger Boring / Jack & Bore Quote in Boulder
24/7 — Emergency dispatch statewide. Tell us entry, exit, pipe size, and county — a bore specialist calls back with cost drivers, not a flat rate.
- Free alignment review
- Colorado 811 on every job
- Licensed spreads statewide
- 24/7 emergency line
Scope your alignment
Send bore path details
Step 1 of 2 — path, pipe, and city first