Category Archives: Stormwater

Learning to create small habitats in Kitsap, Thurston, Pierce counties

Marianne Jackson, a personal trainer and yoga teacher, lives in a fairly typical residential neighborhood in Des Moines, about halfway between Seattle and Tacoma. Marianne has been interested in gardening for years. Recently, however, she decided to up her game by creating a backyard wildlife habitat.

A flowering currant in Marianne Jackson’s garden is a native plant that is good for birds. She says hummingbirds love it.
Photo: Marianne Jackson

That’s when Sarah Bruemmer, a habitat steward coordinator for the National Wildlife Federation, entered Marianne’s life. Sarah knows how to turn small outdoor spaces — or large ones, if available — into functioning habitats. She coordinates a training program that addresses issues from soils, gardening and invasive plants to birds, butterflies and water quality.

Sarah’s month-long program, which includes weekly classes with two Saturday field trips, is scheduled for April in Kitsap and Thurston counties and May in Pierce County. Only a few seats remain for the Kitsap training to be held in Silverdale.

Marianne, 56, took the course last year and came away with a much deeper knowledge of the ecosystem. She had already ripped out her grassy lawn years ago to create what became a series of connected gardens, but the classes taught her how native plant species and water features can help native birds and butterflies.

“I already had the interest,” she said. “Now I have a lot more knowledge that I can put to use. I’m planning to get my yard certified.”

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Hope is alive for restoration of Puget Sound shellfish beds

Officials in Washington state’s Shellfish Program have identified a clear pathway to meet a state goal of restoring 10,800 net acres of shellfish beds to a harvestable condition by 2020.

The 10,800-acre target, established by the Puget Sound Partnership, was considered overly ambitious by many people when the goal was approved in 2011. Many still believe that the shellfish restoration effort will go down in flames, along with other goals, such as increasing chinook salmon and killer whale populations by 2020.

In reporting on the Shellfish Implementation Strategy, a document still under development, I’ve learned that the goal is within reach if enough of the ongoing recovery efforts around Puget Sound continue to make progress. Please check out my latest stories “Bringing the shellfish back” and “Closing in on the magic number in Samish Bay,” both published in the Encyclopedia of Puget Sound.

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Petition seeks to revoke Department of Ecology’s clean-water authority

Citing pollution problems in Puget Sound, an environmental group is asking the Environmental Protection Agency to revoke Washington state’s authority to enforce the federal Clean Water Act.

Northwest Environmental Advocates, based in Portland, says a review of 103 discharge permits issued by the Washington Department of Ecology shows a failure to control nitrogen pollution. Excess nitrogen reduces oxygen levels in the water and triggers algae blooms, resulting in serious problems in Puget Sound, according to a petition submitted to the EPA.

“Ecology determined that over 80 percent of the human sources of nitrogen in Puget Sound comes from cities and towns, but it continues to issue discharge permits as if it were completely ignorant of these facts,” Nina Bell, the group’s executive director, said in a news release.

“It’s just flat out illegal to issue permits that contribute to harmful pollution levels,” she added. “These permits are the walking dead, existing merely to create the impression that the state is doing its job to control water pollution when it is not.”

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Stream ‘bugs’ will help guide funding for future stream restoration

One of the goals established by the Puget Sound Partnership is to improve freshwater quality in 30 streams throughout the region, as measured by the Benthic Index of Biotic Integrity, or B-IBI.

Benthic invertebrates range in size from those easily seen with the naked eye to those that cannot be spotted without the use of a microscope. Photo: C. Dunagan
Benthic invertebrates range in size from those easily seen with the naked eye to those that cannot be spotted without the use of a microscope. // Photo: C. Dunagan

Simply described, B-IBI is a numerical measure of stream health as determined by the number and type of bottom-dwelling creatures that live in a stream. My latest article published in the Encyclopedia of Puget Sound describes in some detail how this index works. Here’s the basic idea:

“High-scoring streams tend to have a large variety of ‘bugs,’ as researchers often call them, lumping together the benthic species. Extra points are given for species that cannot survive without clean, cool water. On the other hand, low-scoring streams are generally dominated by a few species able to survive under the worst conditions.”

Because benthic invertebrates have evolved over time with salmon and other fish, many of these important “bugs” are primary prey for the fish that we value highly. Said another way, “healthy” streams — as measured by B-IBI — tend to be those that are not only cool and clean but also very good habitats for salmon.

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Stormwater projects in Silverdale offer hope for a degraded Clear Creek

Detailed planning and design, followed by thoughtful construction projects, have begun to tame the stormwater menace in Clear Creek, an important salmon stream that runs through Silverdale in Central Kitsap.

A renovated stormwater pond at Quail Hollow near Silverdale includes a walking trail and enhanced wildlife habitat. Photo: C. Dunagan
A renovated stormwater pond at Quail Hollow near Silverdale includes a walking trail and enhanced wildlife habitat. // Photo: C. Dunagan

Stormwater has been identified as the greatest pollution threat to Puget Sound. In Kitsap County, many folks believed that the dense development pattern in and around Silverdale has doomed Clear Creek to functioning as a large drainage ditch for runoff into Dyes Inlet.

But reducing stormwater pollution is not beyond the reach of human innovation, as I learned this week on a tour of new and planned stormwater facilities in the Clear Creek drainage area. The trick is to filter the stormwater by any means practical, according to Chris May, director of Kitsap County’s Stormwater Division and a key player in the multi-agency Clean Water Kitsap program.

Projects in and around Silverdale range from large regional ponds of several acres to small filtration devices fitted into confined spaces around homes and along roadways.

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What comes next under water-quality standards imposed by the EPA?

The Environmental Protection Agency approved new water-quality standards for Washington state this week, overriding a plan approved by Gov. Jay Inslee and the state Department of Ecology.

It was a rare posture for the EPA. Now the state will be pressured to appeal the EPA standards to federal court. Cities and counties as well as some industrial organizations are clearly unhappy with the EPA’s action, while environmental and tribal representatives got most of what they wanted.

The basic structure of polychlorinated biphenyls, where the number and location of chlorine atoms can vary.
The basic structure of polychlorinated biphenyls, where the number and location of chlorine atoms can vary.

The EPA action is especially unusual, given that this state is known for some of the strongest environmental regulations in the country. After much dispute, Ecology finally agreed to much higher fish-consumption rates without increasing the cancer-risk rate, leading to more stringent standards for many of the chemicals. But Ecology had its own ideas for the most troublesome compounds with implications for human health. They include polychlorinated biphenyls (PCBs), arsenic and mercury. For background, see Water Ways, Oct. 18, 2015.

Some news reports I saw this week said EPA’s action will lead to salmon that are safer to eat. But that’s not at all certain, and opponents say it is unlikely that the revised limits on chemical pollution will have any practical effect on compounds that affect human health.

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Understanding how rogue chemicals affect people and marine life

Scientists are just beginning to understand the profound impact that synthetic chemicals are having on humans and other animals in the Puget Sound region.

As a major predator, harbor seals accumulate more than their share of toxic chemicals, including flame retardants. A legal ban on certain chemicals seems to be reducing levels in their tissues. Photo: hj_west, www.flickr.com/photos/hjwest/
As a major predator, harbor seals accumulate more than their share of toxic chemicals, including flame retardants. A legal ban on certain chemicals seems to be reducing average levels in their tissues.
Photo: hj_west

My latest story for the Encyclopedia of Puget Sound addresses so-called chemicals of emerging concern. Please check out “Concerns rise over rogue chemicals in the environment.”

While talking to researchers and investigating a variety of biologically active compounds, I began to realize the complexity of the body’s internal chemistry. I thought I knew something about the endocrine system, but I never fully considered how one hormone can trigger responses in multiple organs, including the release of additional hormones, even creating feedback loops.

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Annual salmon watching is now on the fall agenda

Early and continuing rains in October have increased streamflows and brought coho and chum salmon into their spawning territories ahead of schedule this year.

Dickerson Creek
Dickerson Creek is undergoing restoration at the new bridge on Taylor Road. // Photo: Dunagan

I was out and about today, taking a look at some of the streams in Central Kitsap. I couldn’t pass up the chance to enjoy the sunny and warm weather, and I was pleased to encounter a lot of other folks doing the same thing. Adults of all ages, some with children, were out looking for the elusive salmon. That’s not something I ever saw 10 years ago while making my rounds to public salmon-viewing spots.

I believe the growing interest in salmon may result from ongoing promotions of salmon watching by governmental and volunteer organizations, as well as the news media. Why shouldn’t we go out to watch salmon swimming upstream and possibly, if one is lucky, catch a glimpse of spawning behaviors? After all, we live in one of the best areas for this enjoyable pastime.

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Amusing Monday: The evolution and danger of packaging drinks by six

When I was a young child, we didn’t have to worry about wildlife getting strangled by six-pack rings, because these plastic binders for cans had not been invented yet. I was 9 years old in 1961 when this simple, convenient form of packaging was invented, so I clearly remember the transition. (See Hi-Cone history.)

At the time, nobody predicted the conservation consternation that would be created by such a simple piece of plastic. During the 1970s and up to present, pictures of entrapped birds and other sea creatures became common, suggesting that we at least cut the plastic to save the animals. The first video provides a story of potential revenge.

Before the invention of six-pack rings, people bought soft drinks and beer in cardboard packages, which sort of wrapped around the cans. Pabst Blue Ribbon may have been the first beer sold in cardboard cartons (second video), although Coca Cola may have started the phase. The Coke company claims to be the first to take its bottles out of wooden crates and begin offering cardboard packaging for consumers as early as 1923.

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Extensive floodplain restoration brings new hope to Clear Creek

A giant piece of a cedar log stands erect in a barren landscape north of Silverdale, where a new channel for Clear Creek stands ready to receive water.

An old cedar log was recovered during excavation for a new channel for Clear Creek. Photo: Dunagan
An old cedar log was recovered during excavation for a new channel for Clear Creek.
Photo: Christopher Dunagan

Well, maybe this channel won’t be entirely new. Designers working to restore this portion of Clear Creek studied old maps. They tried to align the new man-made channel to the meandering stream that existed 150 years ago, before farmers diverted the creek around their fields.

During excavation, workers uncovered buried gravel — remnants of the old streambed — along with chunks of cedar that had lain along the edge of the stream. Buried and cut off from oxygen, these pieces of wood survived for decades underground, while cattle grazed in the fields above.

Workers excavating for the new channel used their heavy equipment to pull out what remained of a great cedar log. They stood the log vertical and buried one end in the ground — a monument to the past and future of Clear Creek.

A restored Clear Creek floodplain (before plantings) north of Waaga Way in Central Kitsap. Photo: Kitsap County Public Works
A restored Clear Creek floodplain (before plantings) north of Waaga Way in Central Kitsap.
Photo: Kitsap County Public Works

Chris May, manager of Kitsap County’s stormwater program, showed me the new channel this week. He said it was rewarding to uncover some buried history and realize that the stream would be restored in roughly the same place.

“We found the old channel,” Chris told me, pointing to a deposit of gravel. “We are pretty confident that we got it right.”

This $3-million project has been conceived and designed as much more than a stream-restoration project. The elevations of the land around the stream have been carefully planned so that high flows will spill into side channels and backwater pools. That should reduce flooding in Silverdale and help stabilize the high and low flows seen in Clear Creek.

Before photo: This was the farmers field as it appeared before restoration. Photo: Kitsap County Public Works
Before photo: This was the farm field as it appeared before restoration. // Photo: Kitsap County Public Works

The engineers did not calculate the reduced frequency of flooding, but floodwater storage is calculated to be 18.4 acre-feet, the equivalent of a foot of water spread over 18.4 acres or 29,700 cubic yards or 6 million gallons.

In all, about 30,000 cubic yards of material have been removed across 21 acres, including the former Schold Farm on the west side of Silverdale Way and the Markwick property on the east side. Native wetland vegetation will be planted along the stream and in low areas throughout the property. Upland areas will be planted with natural forest vegetation.

The topsoil, which contained invasive plants such as reed canarygrass, was hauled away and buried beneath other excavated soils to form a big mound between the new floodplain and Highway 3. That area will be planted with a mixture of native trees.

Graphic showing area before restoration. Graphic: Kitsap County Public Works
Graphic showing area before restoration.
Graphic: Kitsap County Public Works

Plans call for removal of 1,500 feet of an existing road with upgrades to two aging culverts. Adding meanders to the straightened channel will create 500 feet of new streambed that should be suitable for salmon spawning.

Plans call for adding 334 pieces large woody debris, such as logs and root wads to the stream. Some of that wood will be formed into structures and engineered logjams to help form pools and gravel bars.

Graphic showing area after restoration. Graphic: Kitsap County Public Works
Graphic showing area after restoration. Notice stream meanders near beaver pond habitat
Graphic: Kitsap County Public Works

“This will be one of the first streams to meet the Fox and Bolton numbers,” Chris told me, referring to studies by Martin Fox and Susan Bolton of the University of Washington. The two researchers studied natural streams and calculated the amount of woody debris of various kinds needed to simulate natural conditions, all based on the size of a stream. (Review North American Journal of Fisheries Management.)

The elevations on the property were also designed so that high areas on opposite sides of the stream would be in close proximity in several locations.

“Beaver will pick that spot,” Chris said, pointing to one location where the stream channel was squeezed by elevated banks on each side. “We want to encourage beaver to come in here.”

Beaver ponds will increase the floodwater storage capacity of the new floodplain and provide important habitat for coho salmon, which spend a year in freshwater and need places to withstand both high and low flows. Because the county owns the flooded property, there won’t be any complaints about damage from beavers, Chris noted.

Aerial photo showing project area with Silverdale in the background, Silverdale Way to the left and Highway 3 to the right. Photo: Kitsap County Public Works
Aerial photo showing project area with Silverdale in the background, Silverdale Way to the left and Highway 3 to the right. // Photo: Kitsap County Public Works

Clear Creek Trail (PDF 390 kb), which begins on the shore of Dyes Inlet, will be routed along the higher elevations as the trail winds through the property. Three new bridges will provide vantage points to watch salmon after vegetation obscures other viewing areas from the trail. Viewing platforms, as seen along other parts of Clear Creek Trail, were not included in this project but could be subject to further discussions.

Count me among the many people — experts, volunteers and users of Clear Creek Trail — who are eager to see how nature responds when water (now diverted) returns to the new stream channel. For decades, the lack of good habitat has constrained the salmon population in Clear Creek. The stream still has problems related to its highly developed watershed. But now a series of restoration projects is providing hope for increased coho and chum salmon and possibly steelhead trout as well as numerous other aquatic species.

In a story in the Kitsap Sun, Reporter Tristan Baurick described work this week on the Markwick property, where fish were removed in preparation for final channel excavation.

Here are some details (including photos) of various Clear Creek projects, as described in the state’s Habitat Work Schedule for restoration projects:

Washington Department of Ecology provided $2 million for the project. Kitsap County’s stormwater and roads programs each provided $500,000.