Working in and Around Watercourses and Wetlands
By: Karen Halwas, Project Manager
Rivers, lakes, and wetlands support a huge diversity of aquatic organisms and influence a large number of catchment processes such as runoff, groundwater recharge and organic carbon storage. Riparian areas help to maintain water quality and provide habitat and movement corridors for wildlife.

West Castle River
Oil and Gas Developments and Aquatic Resources
Industrial users, including the oil and gas industry, leave a large footprint on the land base. For example, approximately 23,734 km of new transmission pipelines were constructed in North America between 1997 and 1999 (Reid and Anderson 1999) and estimates show that an additional 85,000 km are planned between 2001 and 2010. Watercourse crossings represent a major potential impact associated with pipeline projects. Construction activities increase sediment loads resulting in behavioural and physiological responses in aquatic biota, downstream sediment deposition and altered habitat. Physical characteristics at the crossing site may be altered through the excavation and backfilling of the pipeline trench.

Trenched crossing of the Bow River, Canmore, Alberta. Construction of a crossing may result in changes to the physical, biological, and chemical components of the aquatic system and its associated riparian area.
Protection of Aquatic Resources
The federal Fisheries Act is the primary legislation mandating the conservation and management of fisheries and fish habitat. The Fisheries Act states that “no person shall carry on any work or undertaking that results in the harmful alteration, disruption or destruction of fish habitat”. “The Department of Fisheries and Oceans (DFO) Policy for the Management of Fish Habitat” supports the Fisheries Act, clarifies implications for fish habitat management and provides a framework for the achievement of conservation, restoration and enhancement goals under a central guiding principle of “no net loss of productive capacity of fish habitat” (DFO 1986).

Federal and provincial legislation aim to protect aquatic resources like bull trout, a ‘Sensitive’ species native to Alberta.
Typically, provincial governments also administer regulations designed to protect water resources, aquatic habitats and valued species. For example, under the Alberta Water Act, the Code of Practice for Pipelines and Telecommunication Lines Crossing a Water Body and the Code of Practice for Watercourse Crossings are the regulatory mechanisms that establish the objectives, standards and conditions to be met when crossing a water body. Under the same Act, separate provisions regulate activities impacting or capable of impacting water bodies that are excluded from the Codes of Practice, such as headwater areas, lakes and wetlands. In British Columbia, the Oil and Gas Commission reviews ‘Applications for Changes In and About a Stream’ under the authority of the British Columbia Water Act, the Water Act Regulation and the Forest Practices Code of British Columbia Act.
How Can Qualified Aquatic Environment Specialists Assist Oil and Gas Companies?
The Alberta Water Act Codes of Practice define the educational and experience level required to perform pre-development aquatic assessments. A Qualified Aquatic Environment Specialists (QAES) must have sound knowledge of the ecological, regulatory, and engineering issues associated with oilfield construction projects. They have the expertise to ensure that developments comply with federal and provincial regulations. They can also determine if a net loss in the productive capacity of fish habitat is likely to occur and, if so, can design appropriate restoration plans. Crossing design is most effective if performed in conjunction with engineers and construction specialists.
Based on an understanding of the habitat at a crossing location, and regulatory and industry requirements, a Qualified Aquatic Environmental Specialist can provide a range of options. For example, it is often assumed that directionally drilled crossings are less damaging than trenched techniques. However, if a loss of drilling fluids is likely, as a result of geotechnical conditions, a properly planned and rapidly completed trenched crossing may be preferred.
Consulting a QAES is also important for contingency and emergency response planning. A fully developed contingency plan, based on an understanding of environmental conditions at the crossing, may prevent construction delays if the preferred crossing method fails.
Current Issues and Future Considerations
Expectations for proactive planning and ‘learning from experience’ will continue as regulatory requirements increase and authorities become less tolerant of unauthorized activities. Proponents are will continue to be required to minimize or prevent harmful impacts to aquatic resources. For example, the use of common corridors will lead to greater project integration within organizations (i.e. between drilling and pipelining divisions) and also between user groups (i.e. Forest Management Agreement (FMA) holders, other oil and gas companies and recreational enthusiasts).
With the oil and gas industry developing Canada’s north, protecting watercourses and wetlands in this frontier area has become a prominent issue, particularly since the ecological importance of northern peat lands is now better understood and appreciated. At the same time, considerable activity affects watercourses and wetlands in traditional operating areas. Replacement of existing pipeline crossings is an ongoing responsibility, as scour, channel realignment and corrosion take their toll. Additionally, maintenance and replacement of ageing and / or undersized oilfield bridges and culverts continues.
The oil and gas sector is a major land user who, more and more, must work to satisfy a variety of interests, stakeholders and regulators. Consequently, proactive and comprehensive planning will be required. Industry, now more than ever, has the tools and experience to operate responsibly in and around watercourses and wetlands, while still protecting aquatic resources for future generations.
If you are planning to work in and around watercourses and/or wetlands, ARC inc. has the expertise to help guide you through the regulatory process. Our Aquatics Unit, comprised of Qualified Aquatic Environment Specialists and Regulatory Specialists focuses on oil and gas construction projects, and helps to ensure that organizations are compliant with all applicable regulations. To contact the Aquatics Unit at ARC Inc., please call 403-543-1948.
References
The Department of Fisheries and Oceans. 1986. The Department of Fisheries and Oceans Policy for the Management of Fish Habitat, Ottawa, Ont.
Reid, S.M. and P.G. Anderson. 1999. Effects of sediment released during open-cut pipeline water crossings. Canadian Water Resources Journal, 24: 23-39.
Submitted by James Power and Karen Halwas, ARC Inc., 7535 Flint Road SE, Calgary, Alberta. T2H 1G3.
Photography is credited to B. Goetz and B. Redmond.
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