• Survey supported drone work

    Survey supported drone work

    SHN surveyors are bringing new technologies to traditional methods.
    Read more
  • Punta Gorda Lighthouse

    Punta Gorda Lighthouse

    SHN geologists, engineers, and materials inspectors testing concrete at this lighthouse, the most western point of the continental US.
  • Work-Life Integration

    Work-Life Integration

    SHN staff live where we work and play, such as kayaking on Ten Mile Lake, OR.
  • Caring for Forests

    Caring for Forests

    Water quality sampling is an indicator of forest health and sustainable management.
  • Community engagement

    Community engagement

    SHN, the Redwood Community Action Agency, and the City of Arcata organized a walkability assessment.
  • High desert groundwater monitoring

    High desert groundwater monitoring

    Work is great when this is your office.
  • Time for Reflection

    Time for Reflection

    Sure, we work hard but short commutes and nearby natural areas allow us the time for reflection.
  • Beauty in the small things

    Beauty in the small things

    SHN botanists captured this rare Castilleja mendocinensis that occurs in coastal bluff habitat in Mendocino County.

The Latest from SHN


Cal Poly Humboldt Career Fair is Live and In Person!

SHN is happy to attend Cal Poly Humboldt's Career Expo, live and in person, on February 16, 2022.  Students of environmental and civil engineering, environmental science, geology, GIS, planning, and surveying should stop by the SHN table to pick up information in careers in those disciplines.  To save paper and limit waste, here is an electronic brochure that describes SHN; it shows what we do and who we are.  Hope to see you there!

Read more

CEQA, Dam Removal, and Restoration of the Klamath River

Bob Brown, AICP, SHN’s Planning Principal, and Maia Singer and Lauren Dusek of Stillwater Sciences, will present “CEQA, Dam Removal, and Restoration of the Klamath River” at the Association of Environmental Professionals State Conference, in April 2022.  There are four PacifiCorp hydroelectric dams on the Klamath River, in Northern California and Southern Oregon.  Their removal will be the most significant dam removal and river restoration effort ever attempted in the United States.  The project will restore native anadromous fish access to potentially hundreds of miles of mainstem river and tributary habitat, and will restore riparian habitat along approximately 18 miles of river and tributary confluences that are currently inundated by reservoirs.  In the long term, dam removal will also improve water quality, reduce the incidence of disease among salmonids, and support commercial fisheries and tribal communities that depend on Klamath Basin fisheries as an important cultural resource.  

Read more

SHN Welcomes Chuck Steffensmeier, PE--our New OR South Coast Region Principal

SHN is pleased to announce to announce that Charles “Chuck” Steffensmeier, PE, has joined SHN as our Oregon South Coast Regional Principal.  Chuck is an experienced leader and manager in civil engineering design, project management, and construction, with special focus on railroad bridge hydrology and hydraulics, and structural design.  His experience spans railroad design and construction, maintenance, structures design, inspection and construction, water resources, permitting, and project management.  Chuck’s most recent position was as Chief Engineer of port facilities, for the Oregon International Port of Coos Bay.  He was responsible for construction contracts and contractor performance for railroad and marina projects.  He was also the bridge engineer for the Coos Bay Rail Line.  Chuck continues as the Bridge Inspector for the Coos Bay Railroad, which entails annual bridge inspection and special inspections for the rail line. 

Read more

Gwen Erickson, PG, presenting Fundamentals of Erosion and Sedimentation

Gwen Erickson, PG (with stormwater credentials as a Trainer of Record for QSD/CGP and QISP/IGP) will be leading a webinar on the Fundamentals of Erosion and Sedimentation, for staff of the City of Eureka's engineering and public works department.  She will cover the types and causes of erosion, erosion source controls, how to select appropriate Best Management Practices, and the content and designs needed for Erosion and Sediment Control Plans.  Gwen is providing this webinar via Zoom due to COVID-19 protocols, but has provided similar trainings in person to other city government departments and agencies.  The City of Eureka's interactive webinar will be held on January 20, 2022.  If you are interested in having Gwen assist your staff in stormwater compliance, please contact her at This email address is being protected from spambots. You need JavaScript enabled to view it..


Read more

Join Our TEAM

Looking for a change in the right direction?

A career is an individual’s journey of learning and work, and whether SHN is a quick side-trip or a long and rewarding segment depends on the similarities of our future paths.  SHN’s path is one that values enhancing our communities and creating a rewarding environment for employees and shareholders.  We value team work, life-long learning, and family, health and work balance.

View All Open Positions


Featured Projects

  • Martin Slough Sewage Collection System Upgrade, Eureka, CA
    Civil Engineering

    Martin Slough Sewage Collection System Upgrade, Eureka, CA

    SHN’s redesign of the sewer system eliminated overflows to Martin Slough, saved the City and taxpayers $2.8 million in construction costs, and decreased future energy use by eliminating 13 pumping stations.

    Learn More

  • Seismic Hazard Evaluation at an Operating Hydroelectric Dam

    Seismic Hazard Evaluation at an Operating Hydroelectric Dam

    SHN geologists investigated a known fault system to determine potential seismic hazards to the dam.  Trenchscan technology was used to record images that were later digitally merged to create a single image of the entire trenched area.

    Learn More

  • Biological Monitoring for Willits Highway 101 Bypass Construction
    Biological Sciences

    Biological Monitoring for Willits Highway 101 Bypass Construction

    Beginning in 2012, SHN’s Biologist of Record managed a crew of 30 biologists that identified nesting locations of birds, prepared  and implemented salmonid relocation and dewatering plans, conducted Northern Spotted Owl surveys, and prepared daily and quarterly reports documenting the interactions between construction activities and regulated biological resources.

    Learn More

  • “Hazmat” Investigation and Remediation at 46 CAL FIRE sites
    Environmental Services

    “Hazmat” Investigation and Remediation at 46 CAL FIRE sites

    Since 1995, SHN has performed environmental site investigation, hydrology studies, surveys, permitting, remediation design, and infrastructure evaluation and repair designs at 46 sites for CAL FIRE, the California state agency for real estate services (DGS-RESD), and the Division of the State Architect. 

    Learn More

  • Low Impact Development of Grace Hudson Museum and Sun House
    Water Resources

    Low Impact Development of Grace Hudson Museum and Sun House

    With Ann Baker Landscape Architecture, SHN assisted in the design of the Museum’s new outdoor nature education facility, incorporating stormwater wetlands and bioretention areas, and encouraging groundwater recharge with infiltration trenches and permeable pavements.

    Learn More

  • Materials Testing and Special Inspections at Frank R. Howard Hospital
    Materials Testing

    Materials Testing and Special Inspections at Frank R. Howard Hospital

    SHN’s field and laboratory efforts were observed and approved by inspectors from the Office of Statewide Health Planning and Development (OSHPD), the agency that ensures safe healthcare facilities.

    Learn More

    Peninsula Light Company in Gig Harbor, WA thanks SHN

    “The Peninsula Light Company and its members will continue to benefit from your efforts long into the future due to the project’s sustainability. On my part, I would like to express my congratulation and gratitude for the professionalism, effort, and persistence you exhibited during the execution of this challenging HDD project. I would be proud to work alongside any of your crew members and staff that brought success to this project.”

    — Dennis P. Walden, P.E.
    Peninsula Light Company

    Certifications and Associations


    Corporate Office:

    812 W. Wabash Ave.
    Eureka, CA 95501-2138
    Tel: 707-441-8855
    Fax: 707-441-8877

    Office Locations:

    • Arcata, CA
    • Eureka, CA
    • Fort Bragg, CA
    • Redding, CA
    • Willits, CA
    • Coos Bay, OR
    • Klamath Falls, OR

    Log in