Website
Business Details
12 Years
experience
Civil Engineering Solutions for Teton Valley
Founded in 2014, Arrowleaf Engineering P C is an independent civil engineering firm rooted in the natural landscapes of Teton Valley, Idaho. Our approach combines technical expertise with environmental stewardship, delivering infrastructure solutions that prioritize resilience and ecological integration. With licenses in Idaho and Wyoming, we serve Teton Valley, Jackson Hole, and surrounding regions, offering services in water systems, development planning, and environmental assessments. Our founder, Sarah Johnston, brings over 15 years of experience in civil engineering, grounded in academic excellence and a deep understanding of regional ecosystems. We specialize in potable water supply, wastewater disposal, stormwater management, and site assessment, ensuring compliance with permitting requirements while addressing long-term sustainability.

Our work reflects a commitment to quality, with designs that withstand environmental challenges like drought and erosion. By blending traditional engineering principles with adaptive strategies, we create infrastructure that supports both community needs and natural systems. Our teams expertise extends to due diligence, remediation, and construction planning for projects of all scales. Client trust is built through transparent communication, technical precision, and a dedication to exceeding regulatory standards. Arrowleaf Engineering P Cs name, inspired by the resilient arrowleaf balsamroot plant, symbolizes our mission to anchor infrastructure in enduring, nature-informed solutions.
Services
Three Waters Management Development Planning Site Assessment Permitting Assistance Infrastructure Design
Details
  • Year established: 2014
Highlights and features
  • We have 15+ years of civil engineering experience in Idaho and Wyoming.
  • Our designs integrate infrastructure with ecological resilience and sustainability.
  • We specialize in complex permitting and regulatory compliance for water systems.
  • Our team combines academic excellence with hands-on regional environmental expertise.
  • We offer tailored solutions for commercial, residential, and mixed-use developments.
Services
Three Waters Management
Our water management services address potable supply, wastewater disposal, and stormwater systems. We design solutions that ensure regulatory compliance while enhancing drought tolerance and erosion control. By integrating natural hydrological patterns, we create systems that support both community needs and ecosystem health.
Development Planning
We provide comprehensive planning for commercial, residential, and mixed-use developments. Our team handles grading, infrastructure layout, and regulatory permitting to ensure projects meet technical and environmental standards. Services include construction documentation and phased implementation strategies for projects of all scales.
Site Assessment
Our due diligence services include Phase I & II environmental assessments, soil and water testing, and remediation planning. We identify risks and develop mitigation strategies to ensure site suitability for development while protecting natural resources through data-driven analysis.
Permitting Assistance
We navigate complex permitting requirements for water, wastewater, and infrastructure projects. Our expertise includes coordinating with local, state, and federal agencies to secure approvals efficiently. We maintain compliance throughout construction and operations phases to minimize delays and ensure legal adherence.
Infrastructure Design
We design durable infrastructure integrated with environmental contexts. Our work includes roadways, utilities, and drainage systems built to withstand regional challenges like fire, drought, and erosion. Designs prioritize long-term functionality while minimizing ecological disruption through innovative engineering practices.
People
Sarah Johnston
Founder
Sarah Johnston founded Arrowleaf Engineering P C in 2014 after 11 years of academic and professional engineering experience. She graduated summa cum laude from the University of Wyoming in 2007 and worked with two consulting firms before establishing the company. Her expertise focuses on sustainable infrastructure and environmental integration.
Questions
What civil engineering services does Arrowleaf offer?
We specialize in water systems, development planning, site assessment, permitting, and infrastructure design for commercial, residential, and mixed-use projects in Idaho and Wyoming.
How does Arrowleaf integrate environmental considerations into projects?
Our designs prioritize ecological resilience, using natural patterns to enhance drought tolerance, fire resistance, and erosion control while meeting technical and regulatory requirements.
What areas does Arrowleaf serve?
We primarily serve Teton Valley and Jackson Hole, Idaho, with additional expertise in Wyoming and surrounding regions for infrastructure and environmental projects.
How does Arrowleaf handle permitting for engineering projects?
We manage permitting through agency coordination, compliance documentation, and phased approvals to ensure efficient regulatory adherence for water, wastewater, and infrastructure systems.
What experience does Arrowleaf's team have?
Founder Sarah Johnston has 15+ years of experience, including academic excellence at the University of Wyoming and roles with consulting firms before establishing Arrowleaf in 2014.