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Connelly & Associates

Frederick, MD 21704

Location: 1513 Tilco Drive, Frederick, MD 21704

Phone: 301-696-8820

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Connelly & Associates, Inc. is a Frederick, MD–based drilling contractor serving the Mid-Atlantic since 1991, specializing in geotechnical, environmental, water well, and geothermal drilling. They operate a modern, diverse fleet capable of sonic, mud rotary, air rotary, auger, and direct-push work, with expertise in limited-access projects and strict safety and regulatory compliance.

35+ years in businessFounded in 1991

Our Work

Get a Project Quote

Request a detailed estimate for your water well project or service.

Call: 301-696-8820Online quotes not available

Services Offered

  • Air Rotary
  • Auger Drilling
  • Direct Push / Geoprobe
  • Mud Rotary
  • Sonic Drilling
  • Residential Well Drilling
  • Monitoring Wells
  • Vapor Intrusion Assessment
  • Soil Boring
  • Soil Sampling
  • SPT Testing
  • Test Holes/Borings
  • Rock Coring
  • Geothermal Services
  • Closed Loop Systems
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Frequently Asked Questions

How much does well drilling cost?

Costs vary depending on factors like well depth, the site's geology, required permits, and the type of pump system installed. For the most accurate estimate, please contact Connelly & Associates directly.

Which areas do you serve?

Connelly & Associates primarily serves Frederick, MD and surrounding communities within an approximate 15-mile radius. We recommend calling 301-696-8820 to confirm service availability for your specific address.

How long does well drilling take?

Project duration varies depending on depth, site conditions, and complexity. Contact Connelly & Associates for an estimate specific to your project.

What should I ask when contacting a driller?

Ask about licensing, insurance, experience in your area, estimated costs, timeline, and what's included in their service.

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