The riverbend we now know as Fernhill has been for centuries an important place for people, plants and wildlife.

Since time immemorial the Atfalati, or Tualatin Kalapuya people have used and shaped the land around Fernhill. Following the Willamette Valley Treaty of 1855 Kalapuya people were forcibly removed to reservations in Western Oregon. Today, living descendants of these people are a part of the Confederated Tribes of Grand Ronde Community of Oregon.

As part of the New Deal, the federal government helped selected families launch farms in rural areas. Read Doris Byer Swope's recollections of growing up at the site we now know as Fernhill.

In 1950, the Byer family sold most of the farm to the City of Forest Grove, reserving 10 acres to live on. A 1952 expansion of the treatment facility added an anerobic digester and expanded the irrigation program to squash, cucumbers, barley and sheep grazing. In 1954, the Byers sold the remaining acreage and moved to the nearby town of Cornelius.

The City of Forest Grove built a wastewater treatment facility on the west side of Fern Hill Road, near the railroad tracks. It consisted of an Imhoff tank, two settling basins, sludge drying beds, and a laboratory building. The cleaned water was used for crop irrigation. This 1952 drawing shows that expansion plans were on the table not long after the facility opened.

The City expanded the facility to the east side of Fern Hill Road. New features included a primary clarifier, chlorination and effluent stabilization storage ponds—otherwise known as sewage lagoons.

Voters approved formation of the Unified Sewerage Agency to consolidate and improve a scattered network of treatment facilities. One year later, USA took over wastewater treatment operations at Forest Grove. In 2001, USA would be renamed Clean Water Services. 1973 photo courtesy of Pacific University Archives.

In the early 1970s, USA expanded and modernized the Forest Grove wastewater treatment facility.

With the opening of the Solids Handling Facility, the ponds began to play a less central role in wastewater treatment--and became more important for bird habitat.

This project created valuable flexibility in wastewater treatment by connecting the Forest Grove facility to those in Hillsboro. Thanks to these twin 24" pipes, Forest Grove has for years sent its solids to the larger Hillsboro facility, on River Road, for final processing. More recently, the smaller facility on Hillsboro Hwy has sent some of its influent to Forest Grove for cleaning and return to the river.

As Washington County grew and water management methods evolved, changes at the  Forest Grove Wastewater Treatment plant included irrigation system improvements, new pump stations and disinfection through ultraviolet light, rather than chlorine.

Community organizations, Unified Sewerage Agency, educators and others banded together in an early ecological enhancement project that mitigated the impacts of an expansion of Barney Reservoir, 20 miles to the west.

Clean Water Services began purchasing the property from the City of Forest Grove, beginning with the 2006 acquisition of 187 acres, including the wetlands. As this mid-2000s photo shows, Fernhill was already an attractive site for people and birds, but lacked the profound plant diversity we see today.

The first Fernhill Master Plan featured a proposal for treatment wetlands. In the decade since it was adopted, the plan has undergone regular updates and has continued to guide the transformation of the site.

Portland Audubon designated Fernhill an Important Bird Area, confirming what local birders had known for years.

Several acres of asphalt were converted to a wetland for testing the proposed approach to a natural treatment system.

The Water Garden provides respite to people while providing habitat for waterfowl and playing a role in the natural treatment system. View construction photos and learn more on the Water Garden page. 

The first Birds & Brew brought community members together to celebrate new visitor amenities--including the picnic shelter, restroom and water garden--along with construction of the treatment wetlands. 

Converting 90 acres sewage lagoons to their new role in the natural treatment system was a massive construction project, including moving a quarter of a million cubic yards of earth and installing 180 habitat logs. 

As construction ended and seeds began to germinate, green beauty returned to the South Wetlands. Trails reopened, and large-scale functioning of the natural treatment system drew nearer.

Over the years, ecological enhancement projects at Fernhill have evolved in technique and scale. The creation of the South Wetlands, for example, included planting more than three billion seeds and 750,000 native plants -- including this Douglas Spirea.

The Volunteer Stewards walk the paths and help visitors learn what's happening at Fernhill.

The current nutrient filter design, aims to remove ammonia, which is harmful to fish and wildlife. This filter uses a six-foot deep bed of gravel that acts as a host for ammonia-removing microbes that occur naturally in streams and rivers.

Bilingual and bicultural guides lead watershed health walks for residents of Bienestar Community Development properties.

For the 15th year in a row, the Forest Grove treatment facility earned a Platinum Peak Performance Award from National Association of Clean Water Agencies, in recognition of perfect permit compliance over the course of five or more years. This 2017 photo shows the award-winning teams from the Forest Grove and Hillsboro CWS facilities.

Improvements add capacity for visitors and dedicated bus parking for student groups.

Research begins to discover the potential for using natural biological processes that occur between water, plants, and microorganisms to remove contaminates from water.

Fernhill continues to expand and improve for our community and visitors. Recent additions include a Visitor Station to help guests understand how water travels through the site, a dedicated space for volunteers, and new trails along Fernhill Lake.

Keep an eye out for these developments on Fernhill's horizon:

Visitor amenities including a viewing deck and nature play area. Continued research and innovation in agriculture, water recycling, and more. Ever-growing ecological diversity and expanded resources for education.