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.

Practical, precise, and solutions-driven civil engineering services across the Pacific Northwest.
Keystone Engineers is committed to providing practical, precise, and solutions-driven civil engineering services rooted in transparency, collaboration, and clear communication.
Carlos GuillénPrincipal Engineer
Tyler McDonaldProject Manager
Neo ValleProject Engineer
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.
Access designs that balance functionality, user safety, and local code requirements, optimizing slope, turning radii, drainage, and access points.
On-site inspection and project coordination ensuring construction adheres to design standards while managing contractor communications and schedule tracking.
Regular site reviews to verify that erosion and sediment barriers are correctly installed, ensuring regulatory compliance and environmental protection.
Drainage systems engineered to manage runoff safely and comply with local, state, and federal regulatory standards.
Custom drainage systems engineered to safely manage runoff, protecting infrastructure, properties, and the surrounding environment from flooding and erosion.
On-site testing to evaluate soil permeability and inform the design of effective drainage systems, infiltration trenches, and stormwater facilities.
Preparation and processing of National Pollutant Discharge Elimination System permit applications to maintain compliance with environmental regulations.
Comprehensive planning documents outlining best management practices to control pollutants and protect waterways during construction.
Engineering solutions and planning to deliver clean, compliant drinking water to various properties and developments.
System design and technical support delivering safe, reliable drinking water compliant with public health standards for communities and commercial developments.
Residential · Commercial · Land Development
Peshastin, WA · Residential
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.