Special report: Clio Bay cleanup: Controversial, complicated and costly
Chevron, the company operating the KM LNG project at Bish Cove and the Haisla Nation have proposed that marine clay from the Bish Cove construction site be used to cap more than 10,000 sunken and rotting logs in Clio Bay. Haisla Chief Counsellor Ellis Ross says he hopes that using clay to cover the logs will help remediate the environmentally degrading sections of the Bay. The proposal has brought heated controversy over the plan, both among residents of Kitimat and some members of the Haisla Nation, who say that Clio Bay is full of life and that the capping will cause irreparable damage.
An investigation by Northwest Coast Energy News shows that capping thousands of sunken logs is a lot more complicated and possibly costly than anyone has considered. It is also clear that many of the comments both supporting and opposing the Clio Bay project are based on guesses rather than the extensive scientific literature available on the subject.
Northwest Coast Energy News findings include:
In 1997, the Department of Fisheries and Oceans surveyed sunken log sites in Douglas Channel. The results, published in 2000, identified 52 sites just on Douglas Channel and the Gardner Canal that had various levels of enviromental degradation due to sunken logs. Clio Bay was not the list. The DFO scientists recomended followup studies that never happened.
Scientific studies show that degradation from sunken logs can vary greatly, even within one body of water, due to depth, currents, number of logs, and other factors. So one part of a bay can be vibrant and another part environmentally degraded due to low levels of dissolved oxygen and decaying organic material.
If KM LNG wasn’t paying for the remediation of Clio Bay, it could be very expensive. Capping sunken logs at a cove near Ketchikan, Alaska, that is the same size and shape as Clio Bay cost the US and Alaska governments and the companies involved $2,563,506 in 2000 US dollars. The total cost of the cleanup of the site which was also contaminated with pulp mill effluent was $3,964,000. The estimated cost of capping the logs in the Alaska project was $110 per cubic yard.
The Alaska project shows that a remediation project means while most of the logs in a bay or cove can be capped, in some parts of a water body, depending on currents, contamination and planned future use, the logs have to be removed and the area dredged.
Agencies such as the State of Alaska, the US Environmental Protection Agency and the US Army Corps of Engineers all recommend using “clean sand” for capping operations. Although “clay balls” have been used for capping in some cases, the US officials contacted say they had no record of large amounts of marine clay ever being used for capping. They also noted that every log capping project they were aware of happened in sites that had other forms of contamination such as pulp mill effluent.
Chevron only recently retained the environmental consulting firm Stantec to study Clio Bay. The Department of Fisheries and Oceans has told District of Kitimat Council it recently completed mapping of the seafloor at Clio Bay. The Alaska project was preceded by five years of monitoring and studies before capping and cleanup began.
A letter from Fisheries and Oceans to the District of Kitimat says that Clio Bay has been mapped and the department is planning to monitor any capping operations. However, it appears from the Department of Fisheries and Oceans website that the department has no current policies on remediation since the Conservative government passed two omnibus which weakened the country’s environmental laws. According to the website, new remediation policies are now being drafted. That means that although DFO will be monitoring the Clio Bay operation, it is uncertain what standards DFO will be using to supervise whatever happens in Clio Bay.
Northwest Coast Energy News is continuing its investigation of the sunken logs problem. Expect more stories in the days to come.
Special report: Clio Bay cleanup: Controversial, complicated and costly
Haisla Chief Counsellor Ellis Ross says that capping the logs at Clio Bay was a Haisla idea, taking advantage of the opportunity to use the marine clay from Bish Cove to bring back the Clio ecosystem.
The Haisla were told by experts who video taped the bottom of Clio Bay that are between 15,000 to 20,000 sunken logs in Clio Bay.
“I know because I’ve spent a lot of time down there plus my dad actually worked for the booming company for years and knew what was going on out there,” Ross said. “There are two extreme areas we’re talking about, if you look at Clio Bay where it’s estimated that there 15,000 to 20,000 logs down there, imagine what Minette Bay looks like? And it’s all iron, it’s steel. It’s not just wood, there are a lot of cables down there.
“The Haisla have known about the degradation of our territory for years. The problem we have as Haisla members is to restore the habitiat is that nobody wants to clean up the habitat. This was our idea, after review from technical experts from DFO as well as our own experts. We’re looking for a three way solution, with the company, DFO and the Crown and the Haisla.”
“I’d love to go and catch halibut and cod, like my ancestors used to.”
He said that the Haisla have beem aware of environmental problems from sunken logs for decades and have been asking for cleanup of degraded areas since 2004, not just at Clio Bay, but in the Kildala Arm and at Collins Bay, which were studied by DFO in 1997.
“The logs are down there, they are oxidizing, but no one wants to do anything about it, including the company and including the Crown. We had independent people come in and review it and have them come up with a recommendation. There was a small scale project [involving marine clay] that proved that this could work.
“This system here is killing two birds with one stone, get rid of the clay and try to remediate some of the habitat,” Ross said.
He said that the original estimate of marine clay excavated at Bish Cove was 10,000 cubic metres. That has now risen to about 3.5 million cubic metres because the KM LNG project is digging deeper for the foundation of the LNG terminal. The original plan called for disposing 1.2 million cubic metres at sea and another 1.2 million cubic metres on land.
“The original idea was to dump the clay in the middle of the ocean. In small amounts it could have been mitigated, but in large amounts we said ‘no.’ If we try to dump clay in the middle of the channel, we have no idea where it’s going to end up, what the effect is going to be.” Ross said. “We did the same thing here for the terrestrial side, we said ‘OK that with the rock quarries above Bees Creek,’ use the clay to help remediate that as well, bring it back.”
Asked about Ward Cove in Alaska, where the US Environmental Protection Agency ordered a cleanup, Ross said. “The difference here is that no one is ordering these companies to clean up the sites, they walk away. No one is taking responsiblity, The Haisla are trying to do this within the parameters they’ve given us.So if someone could come in and order these companies and do something, we’ll look for something else to do with the clay. Until that day comes, the Haisla are still stuck with trying to bring back this land by ourselves. If the District of Kitimat wants to pay the bill, great. Let’s see it.
“We need to put pressure on the province or Canada to cleanup these sites. We’ve been trying to do this for the last 30 years. We got nowhere. Before when we talked about getting those logs and cables cleaned up, it fell on deaf ears [at DFO]. They [DFO] had no policy and no authority to hold these companies accountable. So we’re stuck, we’re stuck between a rock and hard place. How do we fix it?”
Ross also noted that Shell’s LNG Canada project also faces remediation problems, “Shell is going to have the same problem, their’s is going to be different, they’re going to have get rid of contamination on the ocean bottom and beneath that it’s basically going to be gravel, it’s not clay, they’re going to have get rid of that product.”
Special report: Clio Bay cleanup: Controversial, complicated and costly
Ward Cove, just eight kilometres west of Ketchikan, Alaska, was so polluted by effluent from pulp and saw mills and a fish plant, and filled with 16,000 sunken lots that it qualified for a U.S. Environmental Protection Agency Superfund cleanup.
The Ward Cove project is now considered a benchmark for cleaning up similar bays. Alaska officials emphasized to Northwest Coast Energy News, that while Ward Cove does provide guidelines for capping and dredging logs, they were not aware of any project where logs were capped that did not have other forms of contamination.
If you take a look at satellite images of Clio Bay, BC and Ward Cove side by side you immediately you see the similarities and differences between the two bodies of water. (Note due to parameters of Google Earth, images are slightly different scales)
Both Clio Bay and Ward Cove are 1.6 kilometres long, somewhat elbow shaped, off a main channel and surrounded by mountains.Ward Cove is 0.8 kilometres wide. Clio Bay is about 0.5 kilmetres wide, 0.8 at its widest point. Both have steep slopes from the mountains. Ward Cove is 61 metres deep at the mouth of the cove, descreasing toward the head. Clio Bay is deeper, 182 metres at the mouth, 90 metres in the centre and between 20 metres and 9 metres at the head.
Both Clio Bay and Ward Cove are subject to tidal circulation. Both Clio Bay and Ward Cove are also influenced by fresh water. Ward Cove is fed by Ward Creek, a smaller Walsh Creek and runoff precipitation the enters the cover from the steep mountain slopes. Clio Bay is fed by one creek, a number of small streams and mountain slope runoff, especially during the spring melt.
Haisla Chief Counsellor Ellis Ross estimates there are between 10,000 and 20,000 sunken logs in Clio Bay. The official summary from the United States Environmental Protection Agency said there were 16,000 sunken logs in Ward Cove.
The major difference with Ward Cove is that it was the site of major industrial development including a pulp mill, a sawmill and a fish plant. That meant the level of pollutants in Ward Cove were much higher than in Clio Bay, which has never been used for an industrial plant. It was the pollutants in Ward Cove, mainly ammonia, hydrogen sulfide, and 4-methylphenol combined with the thousands of sunken logs that made the cove a target cleanup and the associated studies.
A fish plant, Wards Cove Packing opened in 1912 and ceased operations in 2002. The Ketchikan Paper Company mill began operating in 1954 and closed in 1997. Prior to 1971, with the rise of the enviromental movement no permits were required by KPC for discharging effluent into the cove. After that the US Environmental Protection Agency issued a discharge permit and monitored effluent. Throughout the time the KPC mill was operating, the EPA says, “high volumes of log storage (approximately 7 billion board feet) caused accumulation of bark waste and sunken logs at the bottom of the cove.” Gateway Forest Products, a sawmill and veneer plant, continued to store logs in Wards Cove until 2002.
A 2009 monitoring report, conducted by the US Army Corps of Engineers after the cleanup for the EPA noted:
An ecological risk assessment was also conducted using a food-web assessment to estimate risks of bioaccumulative chemicals to representative birds and mammals at the top of the Ward Cove food web. The chemicals evaluated were arsenic, cadmium, mercury, zinc, chlorinated dioxins/furans, and PAHs. The results of this assessment indicated that there are no unacceptable risks to higher trophic level organisms in Ward Cove.
A human health risk assessment was conducted to identify potential risks posed by chemicals detected in sediments or seafood (e.g., fish, shellfish). Ingestion of seafood that may contain chemicals bioaccumulated from the sediments was identified as the only complete exposure pathway for humans. The chemicals that were evaluated included: arsenic, cadmium, mercury, zinc, phenol, 4-methylphenol, chlorinated dioxins/furans, and PAHs. Results concluded that sediments in Ward Cove do not pose an unacceptable risk to human health.
A 2007 report on the Wards Cove remediation from the Alaska Department of Environmental Conservation, noted:
The continuing residues impairment in Ward Cove is caused by the historical accumulation of wood waste on the bottom of the cove. The waste includes an estimated 16,000 sunken logs over at least 75 percent of the bottom and decomposing pulp, wood, and bark waste in sediments in thicknesses up to 10 feet over at least 50 percent of the bottom. Wood waste residues can displace and smother organisms, alter habitat, release leachates, create anoxic conditions, and produce toxic substances, all of which may adversely affect organisms that live both on top of sediments and within sediments.
That is a similar problem to Clio Bay.
The report notes that problems with oxygen increase with depth, noting:
The dissolved oxygen impairment was due largely to the fish-processing waste discharge from the seafood processing facility until 2002, and it was limited to the summer months in deeper waters of the cove (below the picnocline, or stratification layer, approximately 10 meters deep). With that discharge removed, limited monitoring in August and September 2003 indicated that dissolved oxygen impairment might remain near the bottom in waters at depths of 30 meters and greater at certain times and locations due to low natural levels of dissolved oxygen and the continuing decomposition of wood waste. Above 30 meters depth, the waters of the cove appeared to meet the [Alaska state] standard for dissolved oxygen. However, there may be limited capacity for waters at 30 meters and deeper to receive additional loading of oxygen-demanding materials and still meet the standard in summer months.
That should mean that the worries about oxygen depletion at Clio Bay are justified due to Clio’s greater depth.
Studies of the biology of Ward Cove began in 1951, with more in the 1960s and one in 1974. In 1995, Ketchikan Paper Company signed a consent decree with the EPA that called for remediation of Ward Cove, In 2000, KPC and Gateway Forest Products signed a second consent decree with the EPA. Those agreements called on the companies to dredge sediments to improve navigation, remove logs and other debris from the dredging areas and “placing a thin-layer cap of 15-30 cm (six to 12 inches) of sand over about 11 hectares (27 acres) of sunken logs.”
The major studies of Ward Cove began in 1995 after first consent decree. The remediation did not take place until the initial studies were complete in 1999, with dredging and capping taking place from November 2000 to March 2001.
The EPA positioned 13 water quality monitoring stations which operated from 1997 to 2002, to measure salinity, temperature and disolved oxygen, nine inside Ward Cove and four outside the cove in Tongass Narrows. Those studies showed that levels of dissolved oxygen in the cove varied by season, depth and location. Many species from salmon to mobile bottom dwellers like crabs were often able to detect and avoid low oxygen areas.
The EPA and the companies involved planned the remediation so that it included both dredging, capping logs and sediment and leaving some areas where nature would take its course.
The reports say that complete dredging, removal and disposal of the contamination would have cost $200 million, The total actual cost of the Ward Cove Remediation Project, beginning with development of the Remedial Design Work Plan, was estimated to have cost $3,964,000 (in 2000 US dollars).
The EPA says cost for the capping component of the project “including preliminary field investigations and reporting, design and plans development, post construction engineering, procurement, construction management, project management, mobilizationm demobilization, engineering/QC and science support, surveys, and capping items” was $2,563,506. Based on the volume of capping material placed, the unit cost of log capping for the Ward Cove Remediation Project was $110 per cubic yard.
The plan called for dredging about 17,050 cubic yards in the area near the cove’s main dock and the dredging of 3,500 yards metres nearby to improved navigation. Before the dredging, 680 tonnes of sunken logs had to be removed. After dredging, a “thin-layer cap of clean, sandy material” was placed in dredged areas unless native sediments or bedrock was reached during dredging.
In other areas, most covered in sunken logs, the plan called for placement of a thin-layer cap (approximately 6- to 12-inches) of clean, sandy material, with the possibility of “mounding” dropping mounds of sand on specific areas. The 2009 report says the area of sand deposits actually increased “due to the fact that thin layer placement was found to be successful over a broader area, and it was not necessary to construct mounding.”
The plan called for natural recovery in areas where neither capping nor mounding was practicable and so about 50 acres was left alone. (DFO says it plans to leave some parts of Clio Bay uncapped as “reference areas.”) Slope and sand
Two studies were carried out as part of the remediation at Ward Cove that do not appear to be contemplated at Clio Bay. The first looked at the “ability of the organic material to support the weight of 15 to 30 centimetres of sand.” Standard engineering equations used at other fill and capping sites were used as part of that study. A second study was carried out to determine the “minimum safety for a given slope,” which given the steep mountains that line Clio Bay, are likely to be factor in the deposit of marine clay. That study determined “For a silty fine sand and a factor of safety of 1.5, the maximum slope would be approximately 40 per cent.”
Those studies led to the conclusion that for the Ward Cove remediation project, the material to be placed on the fine organic sediment could not be gravel and course sand.”
That’s because the larger gravel and course sand “would tend to sink into the sediment and would not provide quality benethic (seabottom) habitat.”
The project decided to use “fine to medium sand with minimal fines.” It also concluded “Because of the very soft existing sediments and steep slopes at Ward Cove, the … material must be released slowly so that the settling velocity is low and bed impact minimized.”
That meant that the EPA had look for a source of quality sand that met their criterion. The sand was found at Construction Aggregates in Sechelt, BC, loaded on 10,000 tonne deck barges, tugged up the coast, unloaded onto land using a conveyor and stockpiled while more tests were done to determine how to deposit the sand on the sunken logs.
Sand was placed on a smaller barge and taken to the deposit site. Initial tests were done with a mechanical dredge equipped with a clamshell bucket. The operator deposited the sand using “swaths” released from the bucket. To make it work properly, the bucket, as supplied by a manufacturer had to be modified by welding baffle plates to the bucket and lengthening the chains to insure consistent deposition of the sand. Two computers with special software called WINOPS, designed for dredging operations “provided the operator and deck engineer the precise locations of the derrick barge position” in order to ensure precise deposition of the sand. WINOPS dredge positioning and guidance software. The WINOPS system made use of three differential global positioning receivers. One GPS receiver was located at the top of the derrick and provided the center positioning of the dredge bucket. Two fixed receivers, one near the starboard center spud and one near the center aft, provided the barge position and heading.
Although using marine clay is likely to produce different engineering challenges at Clio Bay, it is not currently clear that the project has contemplated the level of precision that was used at Ward Cove.
While KM LNG must find a way to dispose of the marine clay from the Bish Cove excavation site, there is a silver lining for the Haisla Nation’s aim of restoring both Clio Bay and the other 50 sites in their traditional territory, since the Kitimat Sand Hill would likely be a ready resource for any future projects. Monitoring
The EPA considered the project finished in September 2001, and long term monitoring began, with major updates every five years in 2004 and 2009.
An EPA report on the 2004 review showed that the three sand-capped areas and one shallow natural recovery area (not sand-capped) had achieved biological recovery; three other natural recovery areas tested had not achieved biological recovery but were making significant progress.
The 2004 studies showed that benethic (sea bottom) communities in uncapped areas showed “species commonly found in areas where organic enrichment is low or declining.” adding “In three other natural recovery areas, benthic communities have not progressed as far toward recovery but are making significant progress.
By the time of the 2009 update, most of the old industrial infrastucture on land at Ward Cove had been demolished and the land area was slated for redevelopment. Many of the companies that had been there had either gone out of business or had declared bankruptcy and the land was taken over by the Ketchikan Gateway Borough,mostly through foreclosure.
The EPA declared that “The remedial action construction is complete, and the remedial action is an operating or ongoing remedial action.”
The 2009 report says that the project was successful in eliminating sediment toxicity. The area was then quickly being recolonized by a diverse bottom dwelling macroinvertebrate species and those species were spreading beyond the specific study areas, so recovery of Ward Cove is expected to continue.
However the 2004 report went on to say that “the achievement of stable benthic biological communities with balanced species composition in more than 75 percent of the area with documented coverage by wood residues on the bottom of Ward Cove” would happen within 40 years from the 2004 study.
The next review of Ward Cove is slated for August 2015.
Special report: Clio Bay cleanup: Controversial, complicated and costly
The Department of Fisheries and Oceans has declined an invitation from District of Kitimat Council to appear at a special meeting on Monday, September 30 to discuss the Clio Bay remediation project. A representative of Chevron will be in the council chambers at the Kitimat branch of Northwest Community College to make a presentation and answer questions.
The letter from DFO to the council from Dave Pehl works at DFO office in Kamloops says:
Thank you for the invitation to attend District of Kitimat Council meeting on September 30, 2013 to address plans by Chevron Canada and Apache Canada(Kitimat LNG) to remediate habitat conditions in Clio Bay. Regretfully, Fisheries and Oceans Canada (DFO) is unable to attend the scheduled council meeting.
Fisheries and Oceans Canada has reviewed a proposal to dispose of soil materials, generated at the Kitimat LNG plant, in Clio Bay, Clio Bay has been used as a log handling site for decades which has resulted in areas of degraded habitat from accumulations of woody debris materials on the sea floor. The project intends to cap impacted areas with inert materials and restore soft substrate seafloor. The remediation of the seafloor is predicted to enhance natural biodiverstiy and improve the productivity of the local fishery for Dungeness crab. The project area does support a variety of life that will be impact and therefore the project will require authorization from Fisheries and Oceans Canada for the Harmful Alteration, Disruption or Destruction (HADD) of fish and fish habitat.
Mapping of the seafloor in Clio Bay has been completed and the project plans prioritizes capping on areas of dense woody debris, followed by areas of soft substrate with woody debris distributed throughout. Mapped areas that are avoided include hard substrates and sensitive habitats such as freshwater streams and eelgrass beds. Buffers have been allocated around sensitive areas and no capping will be conducted in areas of less 10m in depth. Proposed mitigation to avoid potential impacts to areas outside Clio Bay includes avoiding deposition of material within 500m of the confluence of Clio Bay and kitimat Arm. Some areas of degraded or partially degraded habitat will not be capped to serve as reference areas.
Chevron will be required to conduct a pre-construction, construction and post construction monitoring program. Pre-construction monitoring will include collection of baseline information that will be used to assess effectiveness monitoring during and at the completion of the project. Water quality monitoring for turbidity and total suspended solids will be undertaken during construction to determine if established performance criteria are met. The monitoring plan for the project will evaluate
1. Water quality near the sea floor.
2. Fish habitat quality and quantity
3. Biodiversity of the seafloor ecosystem and
4. Distribution of a fishery resource (Dungeness crab)
Reference sites will be used to make comparison between capped and uncapped habitats. Monitoring will continue for a period of five years following the completion of the works. The proponent will be required to report the follow-up monitoring program to DFO in years 1,3 and 5 following construction.
AP reports that Enbridge and the US Environmental Protection Agency are haggling over how much “oil” was spilled into the Kalamazoo River. Enbridge is sticking with its estimate that 849,000 gallons were spilled when the pipeline was breached. The EPA says 1.1 million gallons have been recovered and there may be more to be recovered.
Apparently it all comes down to different definitions of the word “oil.”
Alberta will continue to feed America’s energy needs but must work to clean up resource extraction operations, David Jacobson, the U.S. Ambassador to Canada, said Tuesday…..
However, additional improvements in the environmental performance of oilsands extraction operations are “necessary,” he said.
“We’re aware of the progress that has been made to address some of the environmental impacts in the Alberta oilsands. . . . But as I’ve said on many occasions in the past, additional improvements are necessary.”
The Canadian Association of Petroleum Producers took a more positive spin on Jacobson’s speech in this tweet.
@OilGasCanada US ambassador sees Canada as a pillar “safest and most secure foreign supplier” http://goo.gl/HgB24 #KeystoneXL #tarsands #oilsands
The U.S. Environmental Protection Agency has expressed new fears about the safety of Calgary-based TransCanada Corp.’s proposed Keystone XL oilsands pipeline, warning decision makers in the Obama administration to “carefully consider” whether the project’s proposed route through ecologically sensitive areas in the U.S. Great Plains is appropriate.
In a letter to the State Department, the EPA said two recent leaks that shut down the existing Keystone pipeline highlight the need to require the Canadian company to take more rigorous steps to limit the threat of a major spill on the new line.