Surface Water Management

Where Water is Wealth

Sequim's annual Irrigation Festival reminds us of the value of water!

A healthy supply of water has always been of great value to the local community’s economy and well being. Sequim recognized that “water is wealth” when pioneers built the first irrigation ditches before the turn of the 20th century. Now, as the 21st century is underway, we have learned how truly vital-and scarce-water can be in certain times and certain places.

Within the City we have several water amenities enhancing our quality of life, including Bell Creek at Gebhardt-Zwicker Park (behind QFC) and Gerhardt Park (S 3rd Avenue),Keeler Park, Johnson Creek beach (John Wayne marina), Carrie Blake Park ponds, and the Haller Fields-irrigated with reclaimed water. We also enjoy the murmur of irrigation ditches conveying precious irrigation water from the Dungeness River to farms and ranches throughout the watershed all summer. These same ditches convey stormwater through the City in the rainy season, mostly from County lands uphill of the City limits.


Sequim Van

Rainwater Capture 

Minor flooding is a nuisance when driving around but other concerns are invisible, such as poor water quality, reduced resilience and inefficiencies. “Good housekeeping” on a city-scale means protecting and conserving water supplies for the benefit of the community and the environment. This involves outreach to residents and compliance with federal and state stormwater regulations designed to ensure that public resources are safeguarded: excellent water quality in streams, bays and aquifers, and habitat for salmon and other wildlife.

Since 2013, the City has produced the "Stormwater Management Needs Assessment" and adopted its first Storm and Surface Water Master Plan. Find more information on the "Stormwater Stewardship Project" webpage.

Through planning, the City has positioned itself well to negotiate water quality permit requirements with state agencies if that time comes.

The City is quickly learning how important it is to capture runoff before it flows to the sea, to replenish aquifers, springs, and water supplies in general. Stormwater management regulations are one way, and storage of that captured water in a reservoir is another way. The Dungeness Off-Channel Reservoir proposal will conserve water resources in more ways than one. Follow the link to learn more about this innovative plan.

Stormwater Resources for Building Projects 

Handy guidance documents for following the latest stormwater design manual as required by City code:

Guidance and Worksheets for Small Projects [under construction]

Construction Stormwater Pollution Prevention CHECKLIST (PDF)

Maintenance CHECKLISTS for installed facilities:
Catch basin (PDF)
Infiltration trench (or pond) (PDF)
Wetvault (perforated cistern, drywell) (PDF)
Detention pond (PDF)
Closed detention (manhole) (PDF)
Control structure/flow restrictor (such as inside manhole) (PDF)
Biofiltration (vegetated) swale (PDF)
Wet vegetated swale (PDF)
Wet ponds (series) (PDF)
Filter strip (PDF)
Bioretention (rain garden) (PDF)
Energy dissipator (PDF)
Debris barrier (trash rack) (PDF)
Permeable pavement (PDF)
(Please contact Sequim Public Works for other facilities.)

2012-14 State Stormwater Design Manual

Rain Garden Handbook

Low Impact Development (LID) Resources

Further resources are in development. Let us know if you have a request.

Photo / Video Gallery

"City Habitats" - graphical tour of stormwater in the landscape (Courtesy The Nature Conservancy)

"But it doesn't rain in Sequim!" - video on YouTube (4:30 min.)

Reclaimed Water Drought-Relief Project - video on YouTube (2:20 min.)

Sequim's Water Cycle: A Story Map - a virtual tour of Sequim's water resources (Thanks to volunteer Mark Williams for this creative project!)

Where Water is Wealth ...the rest of the story (PDF) - slideshow from Science Café, February 2015

Flooding at Carrie Blake Park on January 5th, 2015 - Google slideshow

Stormwater Stewardship in Sequim - a narrated slideshow (~22 min.)

Finding Fish: Fieldwork in Sequim-area Creeks - video on YouTube (7 min.)

Reports & Studies

Groundwater levels in the Sequim-Dungeness area ("Hydrologic Monitoring Report," PGG 2009) (PDF)

2015 Surface Water Flow Monitoring Report (2016) (PDF)

Opportunities for Public Involvement

**The Bell Creek Discovery Tour was launched on Earth Day 2015, to increase awareness of our home-town stream. View complete information.

**The City's Interpretive Center at the Water Reuse Demonstration Site (500 N Blake Avenue at east end of Fir Street) has displays and videos on Bell Creek, "Low Impact Development" methods for managing stormwater (including rain gardens), and many other topics. The Center is open by appointment and on a limited schedule - please click on the link above to confirm current operating hours.

**Volunteers are welcome! The application and information may be found on the City's VOLUNTEER webpage (see link on left bar).

Also feel free to contact Ann Soule, Resource Manager with Sequim Public Works, for more information, at 360-582-2436 or email Ann Soule.