DOCSLIB.ORG

Summer Sport Fishery for Lake Trout, Walleye and Northern Pike at Cold Lake, Alberta, 2005

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Summer Sport Fishery for Lake Trout, Walleye and Northern Pike at Cold Lake, Alberta, 2005 Summer Sport Fishery for Lake Trout, Walleye and Northern Pike at Cold Lake, Alberta, 2005 CCONSERVATIONONSERVATION RREPORTEPORT SSERIESERIES The Alberta Conservation Association is a Delegated Administrative Organization under Alberta’s Wildlife Act. CCONSERVATIONONSERVATION RREPORTEPORT SSERIESERIES 25% Post Consumer Fibre When separated, both the binding and paper in this document are recyclable Summer Sport Fishery for Lake Trout, Walleye and Northern Pike at Cold Lake, Alberta, 2005 Bill Patterson Alberta Conservation Association #111, 4999‐98 Avenue, Twin Atria Building Edmonton, Alberta, Canada T5R 2X3. Report Series Editor PETER AKU Alberta Conservation Association #101, 9 Chippewa Rd Sherwood Park AB T8A 6J7 Conservation Report Series Type Data, Technical ISBN printed: 978‐0‐7785‐6501‐7 ISBN online: 978‐0‐7785‐6502‐4 Publication No.: T/144 Disclaimer: This document is an independent report prepared by the Alberta Conservation Association. The authors are solely responsible for the interpretations of data and statements made within this report. Reproduction and Availability: This report and its contents may be reproduced in whole, or in part, provided that this title page is included with such reproduction and/or appropriate acknowledgements are provided to the authors and sponsors of this project. Suggested citation: Patterson, B. 2006. Summer sport fishery for lake trout, walleye and northern pike at Cold Lake, Alberta, 2005. Data Report, D‐2006‐005, produced by Alberta Conservation Association, Edmonton, Alberta, Canada. 24 pp. + app. Cover photo credit: David Fairless Digital copies of conservation reports can be obtained from: Alberta Conservation Association #101, 9 Chippewa Rd Sherwood Park AB T8A 6J7 Toll Free: 1‐877‐969‐9091 Tel: (780) 410‐1999 Fax: (780) 464‐0990 Email: info@ab‐conservation.com Website: www.ab‐conservation.com i EXECUTIVE SUMMARY The Alberta Conservation Association (ACA) conducted a creel survey at Cold Lake during the 2005 summer fishing season to provide information on angler use, sport fish yield and population structure. The survey focused primarily on the lake trout sport fishery although data on the walleye and pike sport fisheries were also collected. Access point surveys were conducted from two sites, the Cold Lake Marina (hereafter CLM) and the Cold Lake Provincial Park (hereafter PP) from 21 May to 21 August 2005. During the survey period, approximately 69% of the angling effort was from CLM and PP combined. The remaining 31% was by anglers who used access points not surveyed (e.g., provincial parks, boat launches). An estimated 9,088 anglers (95% CI = 7,839 ‐ 10,393, n = 1,940) fished the lake for 31,525 h (95% CI = 27,112 – 36,236, n = 6,933) or 0.90 h/ha (95% CI = 0.78 – 1.04). At the survey sites recreational anglers were the majority (i.e., CLM = 83%, n = 1,060; PP = 99%, n = 880). Anglers utilizing the guiding services available on Cold Lake represented 17% and 1% of the CLM and PP anglers, respectively. An estimated 1,098 lake trout (95% CI = 853 – 1,371, n = 244) were harvested by anglers during the survey period of which 68% were harvested by recreational anglers while guided anglers harvested 32%. Simulations using three scenarios of incidental mortality (i.e., low 5%, moderate 10%, and high 15%) suggest additional 174 ‐ 521 fish, respectively could potentially die from incidental mortality. An estimated 3,473 lake trout (95% CI = 2,829 – 4,174, n = 858) were reported released by anglers, of which 75% were by recreational anglers and 25% by guided anglers. Generally, the length of the harvested lake trout ranged 352 – 803 mm (fork length) and weight ranged 2,350 – 7,500 kg. Mean weight of a trout harvested by either group was 4,443 g (95% CI = 4,427 – 4,642, n = 161) with estimated yield of 0.140 kg/ha (95% CI = 0.139 – 0.144). The total catch rate for lake trout was 0.162 fish/h. Guided anglers had a higher total catch rate (harvest + released fish) than the recreational anglers i.e., 0.427 fish/h versus 0.130 fish/h. Harvest and release rates were 0.036 fish/h and 0.126 fish/h, respectively. Of the 165 observed harvest, 8 were protected‐length ii fish. Reported release rates for protected‐length and legal‐length lake trout were 0.089 fish/h and 0.037 fish/h, respectively. All lake trout captured were mature. An estimated 30 walleye (95% CI = 84 – 526, n = 26) were harvested by anglers during the survey period. All walleye were harvested by recreational anglers; guided anglers did not capture any walleye. Estimated mean weight of harvested walleye was 2,328 g/fish (95% CI = 2,175 – 2,519, n = 18) and yield was 0.015 kg/ha (95% CI = 0.006 ‐ 0.035). Anglers released 745 walleye (95% CI = 347 – 1,532, n = 101). The incidental mortality of walleye was an additional 41 fish (95% CI = 18 ‐ 73). Overall, the catch rate for walleye was very low. The exaggeration of catch rates may indicate that fishing success is much poorer than reported. An estimated 554 pike (95% CI = 409 – 697, n = 124) were harvested by anglers during the survey period. Similar to walleye, all pike were harvested by recreational anglers; guided anglers did not capture any. Estimated mean weight of harvested pike was 2,224 g/fish (95% CI = 1,997 – 2,425, n = 55) and yield was 0.036 kg/ha (95% CI = 0.030 ‐ 0.038). Anglers released 7,855 pike (95% CI = 6,458 – 9,369, n = 1,530). Based on data collected from the test angling, pike released had a mean weight of 0.909 kg/fish (95% CI = 0.861 – 0.946, n = 110); estimated additional yield due to incidental mortality was 0.011 kg/ha (95% CI = 0.009 ‐ 0.013). Age‐class distribution for pike (both recreational harvest and test angling) was moderately broad with low densities. The catch rate was low for legal‐size pike and moderate for protected‐length fish. Pike were growing to the legal‐size limit in five years. No large fish (>70 cm TL) were caught. Sport anglers had very poor success and a small portion of anglers harvested the majority of fish. iii ACKNOWLEDGEMENTS The Alberta Conservation Association funded this work. I thank Troy Furukawa and Kevin Yachyshyn for conducting the field component of this work; spending countless hours interviewing anglers on land and water, test angling, and conducting ratio‐of‐use (ROU) surveys. I also thank Alberta Sustainable Resource Development (ASRD), particularly George Walker and Wes English, for arranging accommodations and a work boat for the field, conducting ROUs, and providing local knowledge and fisheries expertise. I am grateful to the anglers who contributed their time and fish to this study, Alberta Student Temporary Employment Program (STEP) for financial support, and The Fish’n Hole for discounts on equipment. iv CCONSERVATIONONSERVATION RREPORTEPORT SSERIESERIES TABLE OF CONTENTS EXECUTIVE SUMMARY..............................................................................................ii ACKNOWLEDGEMENTS...........................................................................................iv TABLE OF CONTENTS ................................................................................................v LIST OF FIGURES.........................................................................................................vi LIST OF TABLES..........................................................................................................vii LIST OF APPENDICES ............................................................................................. viii 1.0 INTRODUCTION................................................................................................. 1 1.1 General introduction ......................................................................................... 1 1.2 Study rationale ................................................................................................... 2 2.0 STUDY AREA..................................................................................................... 2 3.0 MATERIALS AND METHODS ....................................................................... 4 3.1 Survey design ..................................................................................................... 4 3.2 Access point creel survey.................................................................................. 4 3.3 Ratio‐of‐use surveys .......................................................................................... 5 3.4 Test angling......................................................................................................... 5 3.5 Biological fish data............................................................................................. 6 3.6 Data management and analysis ....................................................................... 7 4.0 RESULTS ............................................................................................................. 9 4.1 Survey effort ....................................................................................................... 9 4.2 Angler surveys ................................................................................................. 10 4.3 Lake trout harvest and yield .......................................................................... 11 4.4 Lake trout population structure..................................................................... 12 4.5 Walleye harvest and yield .............................................................................. 15 4.6 Walleye catch...................................................................................................
Load more

Recommended publications
  • The Camper's Guide to Alberta Parks
    Discover Value Protect Enjoy The Camper’s Guide to Alberta Parks Front Photo: Lesser Slave Lake Provincial Park Back Photo: Aspen Beach Provincial Park Printed 2016 ISBN: 978–1–4601–2459–8 Welcome to the Camper’s Guide to Alberta’s Provincial Campgrounds Explore Alberta Provincial Parks and Recreation Areas Legend In this Guide we have included almost 200 automobile accessible campgrounds located Whether you like mountain biking, bird watching, sailing, relaxing on the beach or sitting in Alberta’s provincial parks and recreation areas. Many more details about these around the campfire, Alberta Parks have a variety of facilities and an infinite supply of Provincial Park campgrounds, as well as group camping, comfort camping and backcountry camping, memory making moments for you. It’s your choice – sweeping mountain vistas, clear Provincial Recreation Area can be found at albertaparks.ca. northern lakes, sunny prairie grasslands, cool shady parklands or swift rivers flowing through the boreal forest. Try a park you haven’t visited yet, or spend a week exploring Activities Amenities Our Vision: Alberta’s parks inspire people to discover, value, protect and enjoy the several parks in a region you’ve been wanting to learn about. Baseball Amphitheatre natural world and the benefits it provides for current and future generations. Beach Boat Launch Good Camping Neighbours Since the 1930s visitors have enjoyed Alberta’s provincial parks for picnicking, beach Camping Boat Rental and water fun, hiking, skiing and many other outdoor activities. Alberta Parks has 476 Part of the camping experience can be meeting new folks in your camping loop.
    [Show full text]
  • Cold Lake Health Assessment FINAL
    Cold Lake Health Assessment A study under the Regional Waterline Strategy and Governance Model Development Project Prepared for: Town of Bonnyville, City of Cold Lake, and Municipal District of Bonnyville Prepared by: Stantec Consulting Ltd. Project No.: 113929476 FINAL April 7, 2017 Sign-off Sheet This document entitled Cold Lake Health Assessment was prepared by Stantec Consulting Ltd. This document entitled Cold Lake Health Assessment was prepared by Stantec Consulting Ltd. (“Stantec”) for the account of the Partnership (the “Client”). Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document. Prepared by L. Karoliina Munter, M.Sc., P.Biol. Co-authors: Seifu Guangul, Ph.D., P.Eng, D.WRE Nick De Carlo, B.Sc., P.Biol., QWSP Stuart Morrison, Dip. B.Sc. Greg Schatz, M.Sc., P.Biol Reviewed by John Orwin, Ph.D., P.Geo.
    [Show full text]
  • Comparison of CSS and SAGD in Cold Lake
    University of Calgary PRISM: University of Calgary's Digital Repository Graduate Studies The Vault: Electronic Theses and Dissertations 2015-05-04 Comparison of CSS and SAGD in Cold Lake Shayganpour, Farshid Shayganpour, F. (2015). Comparison of CSS and SAGD in Cold Lake (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/25374 http://hdl.handle.net/11023/2240 master thesis University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. Downloaded from PRISM: https://prism.ucalgary.ca UNIVERSITY OF CALGARY Comparison of CSS and SAGD in Cold Lake By Farshid Shayganpour A THESIS SUBMITTED TO THE FACULTY OF GRADUATE STUDIES IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTERS OF ENGINEERING DEPARTMENT OF CHEMICAL & PETROLEUM ENGINEERING CALGARY, ALBERTA APRIL, 2015 © Farshid Shayganpour, 2015 ABSTRACT Several methods are being used to recover buried heavy oil or bitumen deposits within oil- sands reservoirs. Cyclic Steam Stimulation (CSS) has been a commercial recovery process since the mid 1980’s in the Cold Lake area in northeast Alberta. Also, Several Steam-Assisted Gravity Drainage (SAGD) projects are in operation in different types of reservoirs in the Cold Lake area. There is a debate over whether CSS is more efficient in the Cold Lake reservoirs or SAGD. It is very important for producers to know broadly about the performance and efficiency of the oil recovery process.
    [Show full text]
  • Foster Creek Thermal Project
    C lea rwa Whitemud Fort McMurray ter !( River Falls Gregoire Lake !( iver asca R Athab FOSTER CREEK THERMAL PROJECT Fort McMurray First Nation Gordon Lake Grand Rapids 0 10 20 40 !( Lac Expressway / Highway Gregoire Gipsy Lake Wildland La Kilometres Lake Anzac Wildland Railway Loche 1:1,180,000 ST155 Cenovus Development Areas Foster Creek Proposed EIA Boundary Cheecham !(Garson Lake K !( Parks and Protected Areas CVE-0368-103 Stony Mountain Cold Lake Air Weapons Range/ March 15, 2012 Wildland Primrose Lake Range r N e v A NAD 83 UTM 12N i Indian Reserves R !( A Page Size: 8.5" x 11" Quigley a W n i T Peter t E Metis Settlements s i Created by: The Geospatial Solutions Team r R Pond H h C E Lake C B T 63 L ST A 881 A ST K Mariana Lake !( Janvier S A S Chard !( Pelican Portage Narrows Lake !( Crow Lake Proposed Development Chipewyan Prairie Dene First Nation House River Conklin !( Winefred Christina Lake Margie !( Lake Winefred Lake Remote Calling Calling Lake Lake Wandering River !( Philomena !( Sand River Heart Lake Calling River Water Access First Nation Imperial Mills La Biche !( River Wildland Jackson Lake Foster Creek Primrose Lac Trail Staging La Biche Lake Lac La Biche Islands Thermal Project Garner Orchid Fen r Cold Lake Air Weapons Range/ Sir Winston Churchill ive R olf Primrose Lake Range Athabasca Lac La Biche !( Lakeland W North Buck Lake Cold Lake Wolf Lake First Nation Beaver Lake Normandeau!( Cree Nation Cold Lake !(Rich Lake Happy Hollow Helina Area !( Cold Lake Crane Lake West Kikino Beaver River La Corey !( ST55 !( !( Long Lake Cold Lake Moose Lake Hanmore Lake White Fish Lake First Nation Bonnyville Minnie Lake Kehewin Egremont Cree Nation Saddle Lake 125 First Nation St Paul.
    [Show full text]
  • 88 Reasons to Love Alberta Parks
    88 Reasons to Love Alberta Parks 1. Explore the night sky! Head to Miquelon Lake Provincial Park to get lost among the stars in the Beaver Hills Dark Sky Preserve. 2. Experience Cooking Lake-Blackfoot Provincial Recreation Area in the Beaver Hills UNESCO Biosphere Reserve. This unique 1600 square km reserve has natural habitats that support abundant wildlife, alongside agriculture and industry, on the doorstep of the major urban area of Edmonton. 3. Paddle the Red Deer River through the otherworldly shaped cliffs and badlands of Dry Island Buffalo Jump Provincial Park. 4. Wildlife viewing. Our parks are home to many wildlife species. We encourage you to actively discover, explore and experience nature and wildlife safely and respectfully. 5. Vibrant autumn colours paint our protected landscapes in the fall. Feel the crunch of fallen leaves underfoot and inhale the crisp woodland scented air on trails in many provincial parks and recreation areas. 6. Sunsets illuminating wetlands and lakes throughout our provincial parks system, like this one in Pierre Grey’s Lakes Provincial Park. 7. Meet passionate and dedicated Alberta Parks staff in a visitor center, around the campground, or out on the trails. Their enthusiasm and knowledge of our natural world combines adventure with learning to add value to your parks experiences!. 8. Get out in the crisp winter air in Cypress Hills Provincial Park where you can explore on snowshoe, cross-country ski or skating trails, or for those with a need for speed, try out the luge. 9. Devonshire Beach: the natural white sand beach at Lesser Slave Lake Provincial Park is consistently ranked as one of the top beaches in Canada! 10.
    [Show full text]
  • The Chipewyan from the North American Indian Volume 18
    From the World Wisdom online library: www.worldwisdom.com/public/library/default.aspx THE CHIPEWYAN NORTHERN Canada from about the fifty-seventh parallel to the Arctic circle and from Hudson bay to, and even beyond, the Rocky mountains is predominantly Athapascan territory. The region is char- acterized by large streams, numerous lakes, extensive swamps, prai- ries, barrens, evergreen forests, aspen groves, and bush-covered areas. There are two principal water systems. In the south, between Sas- katchewan and Athapascan rivers, Churchill river flows eastwardly to Hudson bay. In the northwest Athabasca and Peace rivers, carrying Rocky Mountain waters eastward, unite below Lake Athabasca and flow northward as Slave river into Great Slave lake, thence as Macken- zie river to the Arctic. The Chipewyan, who call themselves simply Déne (“people”), are a linguistic group occupying the country from Slave river southward to Cold lake, and from Heart lake (55º North, IIIº 30’ West) eastward to Reindeer lake in north-central Saskatchewan. The name is from Cree Wichipwayániwuk (“they pointed fur people”), referring to the northerners’ fur coats with pointed skirts. The Chipewyan at Cold lake recognize the following divisions: (1) Kaí-theli-ke-hot!ínne (“willow flat-country up they-dwell”), centering about the western end of Athabasca lake at Fort Chipewyan and extending northward to Fort Smith on Slave river and southward to Fort McMurray on Athabasca river. (2) Kés-ye-hot!ínne (“aspen house they-dwell”), at Lac Isle á la Crosse, Portage la Loche, Cold lake, Heart lake, Onion lake, all of which are near the head of the Churchill River system.
    [Show full text]
  • 2012 Marie Lake Report
    THE ALBERTA LAKE MANAGEMENT SOCIETY VOLUNTEER LAKE MONITORING PROGRAM 2012 Marie Lake Report COMPLETED WITH SUPPORT FROM: Alberta Lake Management Society’s LakeWatch Program LakeWatch has several important objectives, one of which is to collect and interpret water quality data on Alberta Lakes. Equally important is educating lake users about their aquatic environment, encouraging public involvement in lake management, and facilitating cooperation and partnerships between government, industry, the scientific community and lake users. LakeWatch Reports are designed to summarize basic lake data in understandable terms for a lay audience and are not meant to be a complete synopsis of information about specific lakes. Additional information is available for many lakes that have been included in LakeWatch and readers requiring more information are encouraged to seek those sources. ALMS would like to thank all who express interest in Alberta’s aquatic environments and particularly those who have participated in the LakeWatch program. These people prove that ecological apathy can be overcome and give us hope that our water resources will not be the limiting factor in the health of our environment. Historical data has been re-queried and summarized for the 2012 report. Acknowledgements The LakeWatch program is made possible through the dedication of its volunteers. We would like to thank Robina Sobey, Jim Ross, Julian & Harriet Nowicki, Hal & Marlene Martin, Hal & Pat Bekolay, and Shane Savard for their assistance in sampling Marie Lake in 2012. We would also like to thank Randi Newton and Erin Rodger who were summer technicians with ALMS in 2012. Program Coordinator Bradley Peter was instrumental in planning and organizing the field program.
    [Show full text]
  • State of the Watershed Environmental Inventory Report for Moose Lake: Summary of Current Information
    STATE OF THE WATERSHED ENVIRONMENTAL INVENTORY REPORT FOR MOOSE LAKE: SUMMARY OF CURRENT INFORMATION PREPARED FOR: THE MOOSE LAKE WATER FOR LIFE COMMITTEE BONNYVILLE, ALBERTA PREPARED BY: 1 AQUALITY ENVIRONMENTAL CONSULTING LTD. 11216-23B AVENUE EDMONTON, AB T6J 4Z6 AND 2 ALBERTA ENVIRONMENT NORTHERN REGION 111 TWIN ATRIA BUILDING 4999-98 AVENUE EDMONTON AB T6B 2X3 WRITERS: 1 COLLEEN PRATHER, PH.D., P.BIOL. 2 THÉO CHARETTE, M.SC. 1 JAY WHITE, M.SC., P.BIOL. MAY 12, 2005 Moose Lake State of the Watershed Report EXECUTIVE SUMMARY Moose Lake is a popular recreational lake in M.D. of Bonnyville of central Alberta. Permanent residents, seasonal residents and daily users have long been concerned about the environmental quality of Moose Lake. Early documented concerns included algal blooms, weed growth, boating speeds, boating noise, polluted water, poor fishing, excessive crowds and excessive development. These concerns led to the development of a Municipal Area Structure Plan by 1980 that was updated in 1985. These plans focused primarily on residential land development but there was consideration for agricultural land development and the lake environment. The purpose of this report is to summarize and document all of the current environmental information for Moose Lake and the watershed. This is an initial step required for the development of the Moose Lake Watershed Management Plan. The development of this plan is led by the Moose Lake Water for Life committee but is guided by the Alberta Environment document Framework for Water Management Planning. There was a large resource of reports and experts consulted during the preparation of this report.
    [Show full text]
  • Iron County, Wisconsin Outdoor Recreation Plan 2010-2015
    Iron County, Wisconsin Outdoor Recreation Plan 2010-2015 Prepared by: Iron County Forestry Department 607 3rd Ave N ~ Suite 2 Hurley, WI 54534 TABLE OF CONTENTS(715)-561 -2697 Wren Falls, Town of Anderson Section Title Page Number 1 County Officials 3 Iron County Forestry and Parks Department 3 Iron County Board of Supervisors 3 2 Statement of Need 4 3 Goals and Objectives 4 4 Description of the Planning Region 5 Social Characteristics 5 Location 5 Population Characteristics 5 Population Projections 5 Ethnicity & Ancestral Composition 6 Employment/Unemployment 6 Demographic Change & Age Distribution 7 Economy 8 Physical Characteristics 9 Topography 9 Water Resources 9 Climate 9 Iron County Geography and Water Resources Map 10 5 Outdoor Recreation Inventory 11 County Parks 11 City Parks 11 Town Parks 12 State Campgrounds 13 Private Campgrounds 13 Waterfalls 13 Non-Motorized Trails 14 Motorized Trails 15 Boat Landings 15 6 Outdoor Recreation Needs Assessment 16 Public Input Assesment 16 Public Input 16 Non-Motorized Trails 16 Motorized Trails 18 Parks 21 Miscellaneous Public Comments 22 Appendix 23 2 SECTION 1 COUNTY OFFICIALS IRON COUNTY FORESTRY AND PARKS DEPARTMENT 607 3rd Avenue North ~ Suite 2 Hurley, Wisconsin 54534 phone(715) 561-2697 fax (715) 561-4801 Joseph R. Vairus – Forest Administrator Tara Stuhr………………………………………..Office Manager/Trail Coordinator Angelo Aimone………………………………………………………………..Scaler Tim Krall …………………………………………………….Recreation Crewman Gary Glonek ………………………………………………………………..Forester Neil Martinko ………………………………………………………….GIS
    [Show full text]
  • Occurrence and Source of Geogenic Arsenic in Groundwater from the Cold Lake-Beaver River Basin, Alberta Michael C
    Occurrence and source of geogenic arsenic in groundwater from the Cold Lake-Beaver River Basin, Alberta Michael C. Moncur, S. Jean Birks, Emily Taylor, John J. Gibson Alberta Innovates-Technology Futures Dogan Paktunc CANMET Mining and Mineral Sciences Laboratory Brent Welsh Alberta Energy Regulator Carol J. Ptacek University of Waterloo Summary Elevated arsenic concentrations have been observed in shallow groundwater in the Cold Lake-Beaver River Basin (CLBR) of Alberta. The geology of this area includes up to 200 m of unconsolidated glacial deposits, with six regional interglacial sand and gravel aquifers, underlain by marine shale. Arsenic concentrations in unconsolidated sediment samples ranged between 1 to 17 ppm. Mineralogical characterization of the sediment samples revealed the presence of fresh framboidal pyrite in the deeper unweathered sediments with variable As contents of up to 1800 ppm. In contrast, the weathered sediments did not contain framboidal pyrite, but exhibited spheroidal Fe oxyhydroxide grains with elevated As concentrations, interpreted as pseudomorphs after pyrite. X-ray absorption near edge spectroscopy (XANES) indicated that the weathered sediments are dominated by As(V) species having spectral features similar to those of goethite or ferrihydrite with adsorbed As, suggesting that Fe oxyhydroxides are the dominant As carriers. XANES spectra collected from the unweathered sediment samples indicated the presence of a reduced As species characteristic of arsenopyrite and arsenian pyrite. A survey of over 800 water wells, isolated from industrial activity, were sampled for As and found that 50% of the wells contained As concentrations exceeding drinking water guidelines of 10 µg L-1. Higher As concentrations in groundwater were associated with increasing depth and reducing conditions, circumneutral pH and lower concentrations of SO4.
    [Show full text]
  • By Carolyn Campbell, AWA Conservation Specialist Conservation AWA Campbell, by Carolyn I M
    IN SITU TAR SANDS EXTRACTION RISKS CONTA M INATING MASSIVE AQUIFERS By Carolyn Campbell, AWA Conservation Specialist ecent research has revealed significant risks to huge underground freshwater channels Rfrom tar sands activity north of Lac La Biche and Cold Lake. In this region, the bitumen resource is deep enough that underground extraction (in situ) techniques, often involving high-pressure steam, are used instead of surface strip mining. Given that accidental steam blowouts have already occurred in the region, the potential for pollution of Canada’s largest freshwater aquifer is very real. Increased monitoring requirements are necessary now to manage these risks, and new oil sands project approvals in the region should be halted until these risks can be better understood. F Few Albertans are aware of the scale EATURES of this underground freshwater resource, located in a wide swath running 40 km north of Lac La Biche and 30 km north of Cold Lake. This aquifer network is generally 200 to 300 metres below the surface. It consists of thick sand and gravel layers, called the Empress Formation, through which groundwater slowly flows at rates of perhaps a WLA October 2008 • Vol. 16, Vol. October 2008 • WLA hundred metres per year. The aquifer layers sit on shale bedrock valleys that predate the last glacial period. In a 2003 report, Alberta Geological Survey (AGS) presented the most comprehensive information available on the Empress Formation, based on oil and gas well data, water well drilling Key features 200 m below ground from the pre-glacial (pre-Quaternary) period. Yellow data, and a few of its own core samples.
    [Show full text]
  • Daghida: Cold Lake First Nation Works Towards Dene Language Revitalization Heather Blair, Sally Rice, Valerie Wood, John Janvier
    Daghida: Cold Lake First Nation Works Towards Dene Language Revitalization Heather Blair, Sally Rice, Valerie Wood, John Janvier The Daghida Project is a research alliance between the community of Cold Lake First Nations and the University of Alberta sponsored by the Social Sci- ences and Humanities Research Council of Canada. As is the case in many First Nations communities in North America (Blair & Fredeen, 1995; Crawford, 1995; Kirkness, 1998; Zepeda & Hill, 1991), the people of Cold Lake are very con- cerned about the risk of losing their language. In this paper, we will outline the context of language loss on the Cold Lake First Nations (CLFN) reserve as well as describe the collaborative research project between the academic community and that of Cold Lake First Nations and the efforts supported by this project to revitalize the Dene Suline language. The Cold Lake First Nations Dene Suline1 live near Cold Lake, Alberta, approximately 300 kilometres northeast of Edmonton on the Alberta and Saskatchewan border. They originally lived in family groups on lands encom- passing roughly 150,000 square kilometres, although the reserve lands that they now inhabit represent less than one percent of their traditional territory. They were a nomadic people who maintained both summer and winter camps, travel- ling between them by foot or dog team. After the signing of Treaty Six in 1876, many families worked on their reserve farms in summer raising cattle and horses. In winter, they continued to travel north to hunt, trap, and fish. In the early 1950s, the federal government turned the traditional Dene Suline territory into an air weapons range (Canadian Forces Base 4-Wing Cold Lake).
    [Show full text]