Keystone Engineers

Practical, precise, and solutions-driven civil engineering services across the Pacific Northwest.

Website

About the firm

Keystone Engineers is committed to providing practical, precise, and solutions-driven civil engineering services rooted in transparency, collaboration, and clear communication.

Team
Micro
Firm type
Civil Engineering · Water / Wastewater Engineering

People

Carlos GuillénPrincipal Engineer

Tyler McDonaldProject Manager

Neo ValleProject Engineer

Capabilities

Land Development

Service website

Comprehensive civil engineering support for new developments, facilitating progress from initial site planning through final regulatory approvals. Solutions are tailored for single-family homes, subdivisions, and commercial facilities.

  • Driveway Design

    Access designs that balance functionality, user safety, and local code requirements, optimizing slope, turning radii, drainage, and access points.

  • Construction Inspection and Management

    On-site inspection and project coordination ensuring construction adheres to design standards while managing contractor communications and schedule tracking.

  • Erosion and Sedimentation Control Inspections

    Regular site reviews to verify that erosion and sediment barriers are correctly installed, ensuring regulatory compliance and environmental protection.

Stormwater Management

Service website

Drainage systems engineered to manage runoff safely and comply with local, state, and federal regulatory standards.

  • Stormwater Design

    Custom drainage systems engineered to safely manage runoff, protecting infrastructure, properties, and the surrounding environment from flooding and erosion.

  • Infiltration Testing

    On-site testing to evaluate soil permeability and inform the design of effective drainage systems, infiltration trenches, and stormwater facilities.

  • NPDES Permits

    Preparation and processing of National Pollutant Discharge Elimination System permit applications to maintain compliance with environmental regulations.

  • Stormwater Pollution Prevention Plans

    Comprehensive planning documents outlining best management practices to control pollutants and protect waterways during construction.

Water Systems

Service website

Engineering solutions and planning to deliver clean, compliant drinking water to various properties and developments.

  • Group A and B Water Systems

    System design and technical support delivering safe, reliable drinking water compliant with public health standards for communities and commercial developments.

Industries

Residential · Commercial · Land Development

Projects

River Stone Ranch

Peshastin, WA · Residential

Project details

Design of a nine-lot cluster subdivision in Peshastin, Washington, including a full Group B water system design to provide reliable utility service for all development lots.