Romaine River Project Quebec

Transcription

Watson Lake Hydro Project
Feasibility Study
Presented by David Morissette, P. Eng.
Access Consulting Group, Whitehorse
March 24, 2014
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Presentation Outline
• Project objectives
• Current Watson Lake power demand
• Pre-screening phase
• Site reconnaissance
• Selection of 3 preferred hydro schemes
• Conceptual study
• Site ranking and recommendations
Watson Lake Hydro Project – Feasibility Study
March 24, 2014
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Hydropower Basics
Head (m): vertical change in elevation between the water level upstream and
downstream of the power plant
Main dam: dam closing the main stem of the river
Spillway: gated or overflow structure used to evacuate the floods
Powerhouse: building in which turbines are located
Dike: closing a secondary valley, to close a reservoir for example
Penstock: pipe to convey water to the turbines
Watson Lake Hydro Project – Feasibility study
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Hydropower Basics
Watson Lake Hydro Project –
Feasibility Study
March 24, 2014
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Project Objectives
• Assess hydro potential in the Watson Lake area
• Identified 3 preferred hydro scheme that can fulfill part or
all of Watson Lake energy demand
• Preliminary conceptual study to determine:
–
–
–
–
Potential project layout
Power and energy potential
Order of magnitude construction costs
Environmental and Socio-Economic considerations
• Recommendations for future work on preferred hydro
schemes
March 24, 2014
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Current Watson Lake Power and Energy Demand
• Total annual energy generation 15.5 GWh per year
• Expected growth 1.1%/year
• Energy demand could double in the next 50 years
• Potential for electrical space heating
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Dec
Nov
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
y (MWh)
165713951424120811411043
997 1061132015101730
Watson
Lake Hydro Project – Feasibility982
Study
March 24, 2014
Oct
0
Sep
200
Aug
400
Jul
600
Jun
800
May
1000
Apr
1200
Mar
1400
Feb
1600
Load/Generation (kW)
1800
3,250
3,000
2,750
2,500
2,250
2,000
1,750
1,500
1,250
1,000
750
500
250
0
Jan
2000
Location of 3 Preferred Hydro Schemes
Rancheria River
Watson Lake/Creek
Tootsee River
March 24, 2014
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Watson Lake Hydro Scheme
March 24, 2014
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March 24, 2014
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March 24, 2014
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Watson Lake Hydro Scheme – Proposed Layout
• Available head: 60 m
• Proposed installed capacity 1.5 MW
• Includes the diversion of McDonald Creek into Watson Lake
• Control structure at the outlet of Watson Lake to regulate
outflows
• Storage in Watson Lake for winter power generation (within
natural range with potential increase drawdown in the winter)
• No flooding of land required
• 7 km of new access road
March 24, 2014
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Watson Lake Hydro Scheme – Proposed Layout
March 24, 2014
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Watson Lake Hydro Scheme – Hydrology
• Data derived from adjacent Tom Creek gauging station
• Average yearly flow of 2.3 m³/s
• Large year to year variation
35
Month
Maximum Discharge
30
Average Discharge
25
Minimum Discharge
Discharge (m³/s)
20
15
10
5
March 24, 2014
01-Dec
01-Nov
01-Oct
01-Sep
01-Aug
01-Jul
01-Jun
01-May
01-Apr
01-Mar
01-Feb
01-Jan
0
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
Total Average
Discharge Watson and
McDonald Creeks
(m3/s)
0.4
0.4
0.3
0.6
7.0
6.6
4.5
2.0
1.9
1.8
1.0
0.5
2.3
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Watson Lake Hydro Scheme – Power and Energy
• Base case 1 m storage in Watson Lake
• Annual energy generation
7.1 GWH/year
• Storage constantly utilized from
December to April
• Average plant utilization factor 55%
• Provides approximately 45% of current
energy demand for Watson Lake
March 24, 2014
Month
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
Average Power
Output (MW)
0.5
0.5
0.4
0.5
1.5
1.4
1.2
0.9
0.8
0.7
0.8
0.6
0.8
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Average Monthly
Energy (GWh)
0.4
0.3
0.3
0.4
1.1
1.0
0.9
0.6
0.6
0.5
0.6
0.4
7.1
Watson Lake Hydro Scheme – Construction Costs
• Construction costs estimated at $19 M, with 25%
contingency
• Cost of energy at $0.18/kWh (10% discount rate)
• Yearly savings of $1.3 M per year compared to diesel
generation
March 24, 2014
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Watson Lake Hydro Scheme – Environmental and SocioEconomics Considerations
• Estimated footprint of 60 ha
• No flooding of land required around Watson Lake required
• Land tenure at the project site (LFN, Town boundaries)
and around Watson Lake
• Recreational use of Watson Lake
• Fisheries and trap lines on Watson Lake, Watson Creek
and McDonald Creek (pike and other species)
• Assessment and permitting of the project (YESAB, Water
license, Fisheries Authorization, Land acquisition)
March 24, 2014
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Watson Lake Hydro Scheme – Land Status
March 24, 2014
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Tootsee River Hydro Scheme
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Tootsee River Hydro Scheme – Proposed Layout
• Available head 80 m, in canyon near Alaska Highway
• Proposed installed capacity 3.5 MW
• Small dam on the river to control flows
• Storage in Tootsee Lake in BC for winter power generation
(assume 2 m storage)
• 100 km transmission line to Watson Lake
• 5 km of new access road to the dam and powerhouse
• 10 km of new access road to Tootsee Lake (from existing
road in the valley)
March 24, 2014
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Tootsee River Hydro Scheme – Proposed Layout
March 24, 2014
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Tootsee River Hydro Scheme – Hydrology
• Data derived from adjacent Rancheria River gauging station
• Average yearly flow of 5.9 m³/s (likely conservative)
• Storage in Tootsee Lake (4.4 km²)
100
90
Maximum Discharge
Average Discharge
80
Minimum Discharge
60
50
40
30
20
10
March 24, 2014
01-Dec
01-Nov
01-Oct
01-Sep
01-Aug
01-Jul
01-Jun
01-May
01-Apr
01-Mar
01-Feb
0
01-Jan
Discharge (m³/s)
70
Month
Total Average Tootsee
River (m3/s)
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
1.8
1.5
1.3
1.5
9.3
20.2
11.7
6.5
6.3
5.1
3.1
2.3
5.9
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Tootsee River Hydro Scheme – Power and Energy
• Base case 2 m storage in Tootsee Lake
• Annual energy generation 19.6 GWH/year (12 GWh/year
of usable energy in 2014)
• Storage in Tootsee Lake utilized constantly from
Average Power
December to April
Month
• Provide approximately 80% of
Watson Lake power demand
March 24, 2014
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
Output (MW)
1.3
1.1
0.9
1.1
3.4
3.5
3.5
3.2
3.1
2.9
1.6
1.6
2.3
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Average Monthly
Energy (GWh)
0.9
0.8
0.7
0.8
2.5
2.5
2.5
2.3
2.3
2.1
1.2
1.2
19.6
Tootsee River Hydro Scheme – Construction Costs
contingency
• Annual savings of $2.4 M per year compared to diesel
generation
March 24, 2014
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Tootsee River Hydro Scheme – Environmental and
Socio-Economics Considerations
• Estimated footprint at 158 ha and 8 ha of potential flooding
at Tootsee Lake
• Land tenure at the project site (very limited, only at
Tootsee lake)
• Regulatory process in 2 jurisdictions (Yukon and BC)
• Foothills pipeline right of way
• Fisheries impact at Tootsee Lake and in river (fish
migration, spawning, etc)
March 24, 2014
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Tootsee River Hydro Scheme – Land Status
March 24, 2014
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Rancheria River Hydro Scheme
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Rancheria River Hydro Scheme – Proposed Layout
• Proposed head: 15 m
• 25 m high dam to create head
• Proposed installed capacity 3 MW
• Storage possibilities in Tootsee Lake and Daughney Lake
• 85 km transmission line to Watson lake
• 6 km of new access road
March 24, 2014
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Rancheria River Hydro Scheme – Proposed Layout
Watson Lake Hydro Project – Feasibility Sudy
March 24, 2014
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Rancheria Hydro Scheme – Hydrology
• Data obtained from Rancheria River gauging station
• Average yearly flow of 22 m³/s (likely conservative)
400
Row Labels
350
Maximum Discharge
Average Discharge
Minimum Discharge
Discharge (m3/s)
300
250
200
150
100
50
March 24, 2014
01-Dec
01-Nov
01-Oct
01-Sep
01-Aug
01-Jul
01-Jun
01-May
01-Apr
01-Mar
01-Feb
01-Jan
0
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
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Total Average
Discharge
(m3/s)
6.8
5.6
5.0
5.7
34.8
75.8
43.9
24.3
23.7
19.4
11.4
8.7
22.1
Rancheria Hydro Scheme – Power and Energy
• Base case 2 m storage in Tootsee and Daughney Lakes
• Annual energy generation 14.7 GWH/year (10 GWh of
usable energy in 2014)
• Storage constantly utilized from
December to April
• Provide approximately 65% of
Watson Lake power demand
March 24, 2014
Month
Average Power
Output (MW)
January
February
March
April
May
June
July
August
September
October
November
December
Mean Yearly
0.8
0.6
0.5
0.6
2.8
3.0
2.9
2.5
2.4
2.1
1.2
1.0
1.7
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Average
Monthly Energy
(GWh)
0.5
0.4
0.4
0.5
2.0
2.2
2.1
1.8
1.7
1.5
0.8
0.7
14.7
Rancheria Hydro Scheme – Construction Costs
contingency
• Annual savings of $800,000 per year compared to diesel
generation
March 24, 2014
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Rancheria River Hydro Scheme – Environmental and
Socio-Economics Considerations
• Estimated footprint at 192 ha plus 127 ha of potential flooding
• Land tenure at the project site and Daughney Lake (LFN,
TTFN)
• Recreational value of Rancheria River (including Daughney
Lake)
• Impact on lower Rancheria River canoe route
• Impact on fisheries resources (migration, spawning, habitat)
March 24, 2014
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Rancheria River Hydro Scheme – Land status
March 24, 2014
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Summary
Watson Lake
Hydro Scheme
Tootsee River
Hydro Scheme
Rancheria River
Hydro Scheme
(1 m storage)
1.5
0.8
0.2
54
(2 m storage)
3.5
2.3
0.4
65
(2 m storage)
3.0
1.7
0.3
57
Average annual energy (GWh)
7.1
19.6 (14.3)*
14.7 (12.0)*
Portion of current demand (%)
40
75
60
Capital costs ($M)
19
46
63
Cost of energy ($/kWh)
0.18
0.21
0.35
Savings per year ($M)
1.3
2.4
0.8
Installed capacity
Average yearly power (MW)
Firm winter power (MW)
Average yearly capacity factor (%)
*Value in parenthesis represent estimated usable energy in 2042
March 24, 2014
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Summary – Site Ranking
• Comparison analysis conducted to analysed each scheme
on the technical/economical, environmental and socioeconomics aspects
1) Watson Lake is the best site on an economical
perspective
2) Tootsee River is the best site on an environmental and
socio-economic perspective
3) Both sites are attractive and can provide energy at a cost
significantly lower than diesel generation
4) Both site can be design to avoid adverse environmental
or socio-economic impacts
March 24, 2014
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Recommendations
1) Detailed topographical mapping of site
2) Conduct pre-feasibility engineering study
3) Advance community consultation
4) Continuous flow gauging
Engineering
Conceptual study
Pre-feasibility
Feasibility
Detail design
Construction
Regulatory
Preliminary considerations
Baseline data collection
Effects assessment
Permitting
Mitigation
March 24, 2014
Duration
6 months
1 year
1 year
1 year
2 years
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Thank you – Questions?
Presented by David Morissette, P. Eng.
Access Consulting Group, Whitehorse
March 24, 2014
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Romaine River Project Quebec

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