Will Woodfibre LNG's cooling system threaten herring?

Herring_Spawn_Woodfibre_in_background_photo_credit_John_Buchanan.jpgMany locals say Howe Sound is recovering from its industrial past. Sightings of marine mammals are on the rise. So, why are they returning? Well, ecology is complex; but, many think the return of a little fishy may have something to do with it.

Enter—the Pacific herring.

Herring are foundational to marine food webs. They feed everything from sea birds to seals, dolphins to humpbacks, coho to Chinook salmon. It’s no wonder Orca—wolves of the sea—are doing rounds in the Sound.

However, this tale isn’t over yet. Every gripping story has an antagonist.

Enter—Woodfibre LNG. A proposed liquefied natural gas plant to be sited across from Porteau Cove Provincial Park, along the Sea-to-Sky Highway.

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If this LNG plant is approved, Howe Sound will see about 40 tankers plough her waters per year. Road trips along the scenic Sea-to-Sky will be marred by an industrial complex and flare stack. And Squamish’s beloved estuary may go under the knife to accommodate an underground pipeline.

But there’s another impact just below the surface

Herring_larvae__Howe_Sound_credit_John_Buchanan.jpgLNG plants transform natural gas to liquid to facilitate shipping in tankers. This uses massive amounts of energy, which in turn produces heat that needs dissipation. The proposed plant will use a marine cooling system. From our read of the Environmental Assessment application, about 17,000 tonnes of water per hour will be drawn through an intake pipe 27 metres below the water’s surface. It’ll cool the plant and be returned to Howe Sound, hot and chlorinated.

Outreach material produced by Woodfibre LNG state, “the intake will be located in deep water (over 25 metres), well below the layer where marine organisms including herring larvae and juvenile salmonids are found in the greatest numbers.” This 25 metre depth is recommended by federal guidelines.

After a cursory look at the 1991 guidelines document (1), troubling issues rise to the surface:

  • The guidelines state marine intakes can have “severe impacts on marine resources.” Juvenile crabs, prawn, shrimp, herring eggs and larvae are particularly vulnerable. Marine animals are typically caught against screens by the suction or sucked into the intake and die.
  • The guidelines omit research on baby herring (i.e., larvae) migrations. Baby herring are weak swimmers and are greatly influenced by currents—and intakes. Not much is known about Pacific herring migrations up and down in the water column. Research shows Atlantic herring—a close relative—do congregate as deep as 40 metres, following prey (2). Hence, we’re not convinced the 25 metre federal guideline is safe and founded in the most recent science.
  • In conversation with retired federal Fisheries and Oceans senior scientist, Dr. Richard Beamish, we learned it’s not unusual to find significant numbers of juvenile salmon and herring at depths greater than 25 metres. He would know, being involved in large-scale fish surveys in Georgia Strait and Howe Sound.
  • The guidelines recommend a minimum of 2 kilometres between an intake and a documented herring spawning area. “Distances less than 2 km could pose a serious risk to herring and other marine fish larvae.” John Buchanan, a local naturalist, documented an abundance of herring spawn well within 2 km of the Woodfibre site in February and March (3). Over the years, he’s witnessed spawn within 100 feet of Woodfibre.

2011-03-25_--1800k_---eyed-Herring-eggs-on-Bladder-kelp_-Woodfiber-B.C.--(2).jpgIs this how our government builds a “World Class” LNG industry?

Recent research highlights the risk of two proposed LNG plants to Skeena River fish stocks, even though at least one of them will avoid a marine intake (4). The plant proposed by Petronas will use an air-cooling system and avoid a marine intake. Doesn’t Howe Sound deserve the same level of precaution?

In 2010, California adopted new regulations that require plants to stop using "once-through" cooling systems (5). The State Water Board says they are “dangerous to marine life” and kill millions of marine animals every year.

Is this cooling system classified as dangerous in California, but “World Class” in BC? Why haven’t the 1991 federal guidelines for marine intakes been updated and brought into the 21st Century? Are the costs for modern technology and a sustainable LNG industry too grand? Will Howe Sound end up paying these costs in dead fish? Well, the story isn’t over yet.

Enter—the Engaged Citizen, who’s hopeful, strong and cares about BC’s future.

Although the proposed Woodfibre LNG plant is undergoing a provincial environmental assessment, the federal government must also make a decision on the project this summer. And as you know, a federal election is scheduled for October. Get the picture?

If enough people express displeasure with Woodfibre LNG to local MPs, they will get nervous about their party approving an unpopular project leading up to an election. With the Mount Polly disaster and English Bay spill still in our rear-view, many British Columbians have had enough World Class lip service. Help protect Howe Sound and its magnificence. Please sign the Declaration to Protect Howe Sound. We’ll take it to local federal candidates in region. Big and little fish will thank you for it.

Stan Proboszcz and Dave Brown, photos by John Buchanan

Media stories:

Survey-button.jpgReferences

(1) 1991 Federal Guidelines for Minimizing Entrainment and Impingement of Aquatic Organisms at Marine Intakes in British Columbia http://publications.gc.ca/collections/collection_2007/dfo-mpo/Fs97-4-2098E.pdf

  • Page 3 –Distance Criterion: “Do not site intakes at or near herring spawning areas that show historical spawning over time. Allow a minimum of 2 km between an intake structure and a documented herring spawing area. Distances less than 2 km could pose a serious risk to herring”
  • Page 4 – Depth Criterion: “Install screened stationary intakes at a minimum depth of 25 m below the zero tide level. This guideline is in addition to not siting marine intakes near sensitive fish larval areas.”
  • Page 1 – No studies statement: “In British Columbia, no studies on entrainment in seawater intakes have been conducted because the region has no nuclear power plants and few operating marine intakes for other industries.”

(2) Research highlighting depth migrations of Atlantic herring to 40 metres, synopsis: http://link.springer.com/article/10.1007%2FBF00001025#page-1

(3) Videos of 2015 herring spawn near Woodfibre LNG videos, by John Buchanan:

(4) Research highlights LNG risk to Skeena River: http://www.vancouverobserver.com/news/proposed-lng-terminals-could-collapse-bc-wild-salmon-run-sfu-scientists

(5) California State Water Board phase out of harmful marine intakes: http://www.swrcb.ca.gov/publications_forms/publications/factsheets/docs/oncethroughcooling.pdf