Most services provided by Pacific Hydrologic Incorporated are as a specialty consultant to design firms and local agencies engaged in planning, development, environmental studies, water resources management, bridge design, hydropower generation, and litigation. 

Clients for which Pacific Hydrologic Incorporated has provided services include:

• Many northern and central California local agencies
• Central Federal Lands, Highway Division
• United States Forest Service
• CH2M-Hill
• FHWA
• HDR Engineering Inc.
• McConnell Foundation
• MGE Engineering
• Montgomery-Watson Engineers
• MRO Engineers
• Nichols Melberg Rossetto AIA
• Northstar Engineering
• North State Resources
• Omni-Means
• Pebble Limited Partnership
• PG&E
• Quincy Engineering
• Roseburg Lumber
• SDS Engineers
• Simpson Paper
• Thomes Creek Rock
• TY Lin International
• USAA Insurance
• Private Property Owners