Water Level - m Dec 1. Dec/ Jan/ Water Level - m 284.

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1 Present and Preliminary Preferred Lakes Fairy Lake, Peninsula Lake and Lake Vernon Lower Muskoka High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed Lakes Annual Operating Limits - dam operated in accordance with the Hackner-Holden Agreement and for recreation, navigation, fisheries, spring flood control and hydropower production - normal summer operating range varies from 0.43 m to 0.21 m (from start to end of summer) - summer minimum outflow of 3 m3/s for downstream fish habitat and water quality - fall drawdown of 0.24 m (to m elevation) between September 15 to October 15 to encourage lake trout to spawn deeper on spawning shoals; also prevents lake from freezing at high levels with subsequent ice damage to infrastructure - winter drawdown to m (0.3 m beyond fall drawdown limit) for spring flood control and winter hydropower production (release of 11m 3 /s during winter) - lake trout spawning shoals likely affected by winter drawdown - recreational lake with fishing and boating being popular activities - extensively developed shoreline with a high percentage of permanent residents, adequate access required for shoreline structures - uncontrolled outflow from Big East River can create challenges in controlling lake levels during high flow periods (i.e. spring freshet and summer storms) - low water levels may create navigational concerns on lakes or interconnecting channels - winter drawdown identified as concern for littoral zone habitat and wildlife - slightly higher spring level (to m) to improve ecological conditions for wetlands and spring spawning fish species - no change to spring freshet levels, exceedances of High Water Zone level ( m elevation) or ice damage potential - no change to spring maximum outflows or Flood Damage Zone flow exceedances - summer levels will decline gradually over the season and will remain within 10 cm (4 ) of the present median range - the range of summer levels will increase by up to 12 cm relative to average infrastructure elevation Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Lake Vernon - water level m Fairy Lake - water level m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

2 Present and Preliminary Preferred Mary Lake Lower Muskoka High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed Mary Lake Annual Operating Limits - dam operated in accordance with the Hackner-Holden Agreement, and for power production, spring flood control, fisheries, navigation and recreation - normal summer operating range of 0.33 m ( m and m) - summer minimum flow of 3 m3/s into North Muskoka River for fish habitat and water quality - fall drawdown of 0.22 m by October 15 (to m) to encourage lake trout to spawn deeper on spawning shoals, also prevents lake from freezing at high levels with subsequent ice damage to docks - winter drawdown to m elevation (0.45 m beyond fall drawdown limit) for spring flood control and winter hydropower production (release of 11 m 3 /s during winter) - lake trout spawning shoals are affected by large winter drawdown - fluctuating and low water levels affect boating activities (noted during the previous public consultation process) - water quality identified as a public concern - maintainence of summer fishery (particularly northern pike and smallmouth bass) - heavy rainfall, above average snowmelt, and/or extended dry periods can result in lake levels outside the Normal Operating Range - slightly higher spring level (to m) to improve ecological conditions for wetlands and spring spawning fish species - no chnage to exceedances of High Water Zone level ( m elevation) or to ice damage potential - summer levels will decline gradually over the season and will remain within 20 cm (8 ) of the present median range - the range of summer levels will increase by up to 10 cm relative to average infrastructure elevation - less differential between fall and winter drawdown levels (reduced to 0.15 m) to improve lake trout spawning habitat conditions (slightly more fall drawdown, significantly less winter drawdown) - no change to downstream flows for hydropower generation or minimum flows Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Mary Lake - water level m Mary Lake - water level m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

3 Present and Preliminary Preferred Kawagama Lake Lower Muskoka High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed Kawagama Lake Annual Operating Limits - dam operated in accordance with the Hackner-Holden Agreement, and for recreation, navigation, spring flood control, winter hydropower generation and fisheries needs - flow changes at dam are coordinated with downstream dams at sville and Matthiasville - normal summer operating range of approximately 0.4 m, with summer season drawdown (between 5 and September 1) of 0.38 m - fall drawdown of 0.58 m (to m elevation) between September 1 and October 15 to encourage lake trout to spawn deeper on spawning shoals - winter drawdown to m elevation (0.6 m below fall drawdown level) for hydropower production and spring flood control - minimum downstream flow of 3 m 3 /s for ecological needs - lake trout spawning shoals are affected by large winter drawdown - large summer drawdown identified as an issue by lake cottage association - high spring water levels cause damage to docks/beaches; loss of access identified as a concern by a number of property owners - ice damage identified as a concern along the south shore of the lake - shoreline erosion a concern at the east end of the lake during high water levels - low winter water levels a concern for shoreline dug wells and water lines - lower spring levels (about 0.1 m) to address shoreline erosion and high spring levels - no change to shoreline ecological conditions through the spring and summer - summer recreational water levels will be similar to present conditions and infrastructure access will not be affected - less differential (reduced to 0.2 m) between fall and winter drawdown levels to improve lake trout spawning habitat conditions (similar fall drawdown, significantly less winter drawdown) - improved minimum and base flows in summer and winter Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Kawagama Lake - water level m Kawagama Lake - water level m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

4 Present and Preliminary Preferred Lake of s Lower Muskoka High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed Lake of s Annual Operating Limits - sville dam operated in accordance with the Hackner-Holden Agreement, and for recreation, navigation, spring flood control, winter hydropower generation and fisheries needs - normal summer operational range of 0.22 m maintained for recreation channel navigation, dock and marina access - minimum outflow of 3 m 3 /s for downstream water quality and fisheries needs - dam operation co-ordinated with Kawagama and Tea Lake dams (upstream) and Matthiasville and Bala dams (downstream) - fall drawdown of 0.07 m prior to lake trout spawning period - winter drawdown to m (0.76 m beyond fall drawdown level) by March 15 for spring flood control and winter hydropower production (release of nominal flow of 17 m 3 /s during winter) - lake trout spawning shoals are affected by large winter drawdown - popular tourist/recreational area with high value shoreline development - public issues include high water levels, low water levels, and effect of winter drawdown on lake trout spawning beds - shoreline infrastructure survey found that docks and boathouses were on average 0.46 m above the summer - downstream flows not consistent, minimum flows not achieved on regular basis - maintain higher outflow to ensure that a base flow of 3m 3 /s is available at South Falls during walleye spawning and incubation period (mid-april to early June) - slightly higher and earlier spring peak with gradual seasonal drawdown to improve ecological conditions for wetland species and spring spawning fish species - no change to flood or ice damage potential; slightly higher maximum outflow and potential for more exceedances of downstream flow limit during the spring - median summer water levels and water level fluctuations will be similar to present conditions, lower end of summer water levels (up to 10 cm lower) not expected to cause recreational access and/or infrastructure concerns - less differential (reduced to 0.5 m) between fall and winter drawdown levels to improve lake trout spawning habitat conditions (more fall drawdown, less winter drawdown) - improved minimum and base flows in summer and winter (more consistent and greater quantity) Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Lake of s - water level 315.2m Lake of s - water level 315.2m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

5 Present and Preliminary Preferred Lakes Rosseau and Joseph Lower Muskoka High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed Lakes Rosseau & Joseph Annual Operating Limits - Port Carling dam complex (consisting of 2 navigational locks and operational dam) controls the water levels on lakes Rosseau and Joseph - dam operated in accordance with Hackner-Holden Agreement and for recreation, navigation, spring flood control and winter hydropower generation needs - normal summer operating range of 0.2 m for navigational requirements of large tour boats through locks - fall drawdown of 0.1 m by October 15 (to m elevation) to encourage lake trout to spawn deeper on shoals; also to avoid ice damage to docks during winter drawdown - winter drawdown to m (0.46 m beyond fall drawdown limit) for spring flood control and winter hydropower production - minimum downstream discharge of 0.7 m 3 /s - an intensively used recreational lake with extensive high value shoreline development, July and August are peak recreational boating months - high flows in channel downstream of dam can cause flooding of downstream marinas - navigational requirements for commercial vessels - lake trout spawning shoals on Lake Rosseau are affected by the winter drawdown; Lake Joseph has a self sustaining lake trout population - slightly higher spring peak with gradual seasonal drawdown to improve ecological conditions for wetland species and spring spawning fish species - no change to flood or ice damage potential; lower average maximum outflow and no substantial change in exceedances of downstream flow limit during the spring - median summer water levels and water level fluctuations will be similar to present conditions - no change to end of summer water level, hence no navigation or infrastructure access changes - less differential (reduced to 0.25 m) between fall and winter drawdown levels to improve lake trout spawning habitat conditions (same fall drawdown, less winter drawdown) - improved minimum and base flows in summer and winter (more consistent and greater quantity) Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Lake Rosseau - water level 7m Lake Joseph - water level 7m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

6 Present and Preliminary Preferred Lake Muskoka Lower Muskoka Lake Muskoka / Burgess GS Annual Operating Limits High Water Zone Maximum 90 Percentile Mean Median 10 Percentile Minimum Proposed the Bala dam complex, including the Burgess GS in a side channel north of the North and South Bala dams, controls the water levels on Lake Muskoka, the largest lake in the Muskoka watershed - dams are operated in accordance with the Hackner-Holden Agreement, and for recreation, navigation, spring flood control and winter hydropower generation - normal summer operating range of 0.24 m - minimum downstream flow of 3 m 3 /s to be maintained from each dam for downtream water quality and fisheries needs - Burgess generating station requires 4.2 to 4.9 m 3 /s to operate; plant is shut down in summer if insufficient water to maintain lake levels and minimum downstream flow of 6 m 3 /s - fall drawdown of 0.15 m by October 30 (to m elevation) to encourage lake trout to spawn deeper on shoals; also avoids ice damage to docks during winter drawdown - winter drawdown to m elevation (0.61 m beyond fall drawdown elevation) for spring flood control and winter hydropower production - an intensively used recreational lake with extensive high value shoreline development, July and August are peak recreational boating months - lake trout spawning shoals are affected by the large winter drawdown; lake trout populations maintained by stocking - lake supports a wide variety of cold and warm-water sportfish species including lake trout lake whitefish, walleye, largemouth and smallmouth bass and northern pike - commercial navigation on lake occurs from ice-out in April until freeze up in early December - outflow from lake is primary determinant in maintaining suitable flows for walleye spawning in the lower portion of the Moon River - slightly higher spring peak with gradual seasonal drawdown to improve ecological conditions for wetland species and spring spawning fish species - no change to flood or ice damage potential - no change to average maximum outflow and no change in exceedances of downstream flow limit during the spring - median summer water levels and water level fluctuations will be similar to present conditions - less differential (reduced to 0.35 m) between fall and winter drawdown levels to improve lake trout spawning habitat conditions (similar fall drawdown, less winter drawdown) - commercial navigation will not be affected by preferred strategy - improved minimum and base flows in summer and winter (more consistent and greater quantity) - improved spring flows for walleye spawning in Moon River Historical Data 1980 to Operating Rules and Daily Water Level Statistics ARSP Simulation Base Case - Operating Rules and Daily Water Level Statistics Lake Muskoka - water level m Lake Muskoka - water level m ARSP Simulation Proposed Case - Operating Rules and Daily Water Level Statistics

7 Muskoka River Water Management Plan McCraney, Camp and Tasso Lakes McCraney Lake McCraney Lake Annual Operating Limits - remote dam, access by helicopter - late summer (August to October) drawdown of 2-3 m to augment late summer flow in Big East River - lake refills over fall and winter, no storage of spring freshet - late summer drawdown impacts recreational uses of lake (part of Algonquin Park canoe route) - abrupt cessation of flow into McCraney Creek and the Big East River in mid October appears to be incompatible with brook trout biology (start of migration/spawning period, and in the worst case, could strand migrating fish in isolated pools). - abrupt cessation of flow in mid-october has been observed to adversely affect local congregations of fish in McCraney Creek leading to the Big East River. - desire to increase efficiency of dam operations. - reduced drawdown range (1 m total) that will not affect summer recreational uses - a more natural water level regime, with a spring peak, a gradual summer season drawdown, and stable fall and winter water levels - potential to eliminate dam operation (overflow structure with slot or valve to accommodate summer base flow release) Camp Lake - long dam spillwall easily passes high flows (spring freshet, summer storms) - stable summer water levels for recreation - fall drawdown of 1 m to encourage lake trout to spawn deeper - normally three operational trips per year, valve used to release flows - fall drawdown exposes portion of lake trout spawning shoals and may be detrimental to population Lower Muskoka - reduced fall drawdown (0.25 m total) will improve lake trout spawning habitat area - a more natural water level regime, with a spring peak, a gradual summer season drawdown, and less fall drawdown Tasso Lake Camp Lake Annual Operating Limits Tasso Lake Annual Operating Limits - stable summer water levels for recreation (navigation through culvert to South Tasso Lake) - limited fall drawdown (0.2 m) and stable fall/early winter levels - late winter drawdown of 0.4 m for spring flood control for lake - maintain navigational access to South Tasso Lake - maintain 0.5 m3/s base flow in Tasso Creek for brook trout habitat Proposed - no change to summer or fall water levels (maintain recreational uses and water access to South Tasso Lake) - slightly elevated spring peak and longer duration to improve habitat conditions for wetlands and spring spawning fish species - winter drawdown level the same as present operation, but spread out over the October 15 to April 1 time span to maintain flow into downstream habitats (i.e.tasso Creek and Big East River) - continued winter drawdown to maintain spring storage

8 Buck and Fox Lakes Lower Muskoka Buck Lake Buck Lake Annual Operating Limits - spring peak to m elevation - stable summer water levels for recreation - winter drawdown of approximately 0.15 m during January and February (to create storage for spring freshet) - stop logs replaced after spring freshet has receded - dam operated in conjunction with Fox Lake dam - flooding occurs at lake levels above m - channel constriction between lake and dam slows release of high spring waters - difficult to balance discharge to achieve target lake levels - maintenance of warm water fishery (northern pike, smallmouth bass and walleye) - spring peak at same elevation (301.0 m), no change in flooding or ice damage potential - spring peak two weeks earlier to improve habitat conditions for wetlands and spring spawning fish species - quicker reduction to summer to address spring high water concerns - summer recreation water levels similar to present conditions Fox Lake water Level - Meters (GSC Datum) narrow summer operating range of 0.2 m for recreation - winter drawdown of 0.15 m by end of March (storage for spring freshet) - stop logs replaced after spring freshet has receded - dam operated in conjunction with Buck Lake dam Fox Lake Annual Operating Limits - resident concerns over high early summer water levels, shoreline erosion and loon nesting - downstream bridge restricts outflow during high flow events - difficult to balance discharge to achieve target lake levels - walleye spawning area at Hoodstown rapids (Vernon Lake downstream of dam) - maintenance of warm water fishery (northern pike, smallmouth bass, perch and walleye) - proposed operating strategy similar to existing operations - earlier and slightly higher spring peak for ecological attributes (spring spawning fish and wetlands) - shorter duration spring peak and quicker return to summer to address social concerns (flooding and shoreline erosion) - summer levels similar to existing operations Proposed

9 High Falls, Wilson Falls and Falls High Falls GS Headpond Lower Muskoka Proposed High Falls GS Annual Operating Limits - operated by Generation - normal operating range of 0.77 m ( m to m); maximum possible range of 2.74 m - daily water level fluctuations - poor water quality in river - low water levels - no changes proposed to headpond operations - no change to flows available for hydropower generation due to proposed operational changes in upstream lakes Wilson Falls GS Headpond Wilson Falls GS Annual Operating Limits - operated by Generation - normal operating range of 0.83 m ( m to m); maximum possible range of 2.45 m - daily water level fluctuations - no changes proposed to headpond operation - no change to flows available for hydropower generation due to proposed operational changes in upstream lakes Falls GS Headpond Falls GS Annual Operating Limits - operated by Generation - normal operating range of 1.01 m ( m to m); maximum possible range of 2.56 m - none identified - no changes proposed to headpond operation - no change to flows available for hydropower generation due to proposed operational changes in upstream lakes

10 Burnt Island, Joe and Ragged Lakes Burnt Island Lake Lower Muskoka Proposed Burnt Island Lake Annual Operating Limits - remote dam, access by boat or float plane, no winter access (unless emergency) - fall drawdown of 1.5 m between September 15 and October 15, no winter drawdown - lake allowed to rise naturally during high flow periods as no shoreline development - lake is self regulating in the summer - maintain habitat conditions for lake trout and lake whitefish (fall drawdown not required if no winter drawdown) - recreational lake located within Algonquin Park (no permanent infrastructure), part of interior canoe route with 52 remote camp sites, no motorized boats allowed - higher spring peak and gradual seasonal drawdown will improve ecological conditions for wetland species and spring spawning fish species - gradual decline in lake level over summer recreation season (no infrastructure concerns) - improved habitat for lake trout in long term (no drawdowns) - reduced operational demands (potential to convert to non-operational structure) Joe Lake Joe Lake Annual Operating Limits - vehicular access in summer, snowmobile or foot access in winter - normal summer operating range of 0.4 m for recreation (Algonquin Park canoe route) - fall drawdown of 0.3 m (September 15 October 15), no winter drawdown - fall drawdown corresponds with Burnt Island Lake fall drawdown - maintain habitat conditions for lake trout and lake whitefish (fall drawdown not required if no winter drawdown) - recreational lake located within Algonquin Park, part of interior canoe route with 61 remote camp sites, 1 lodge, 1 youth camp and 6 private cottages, no motorized boating allowed. - higher spring peak and gradual seasonal drawdown will improve ecological conditions for wetland species and spring spawning fish species - gradual decline in lake level over summer recreation season improves downstream flows - lower end of summer levels (up to 18 cm) may cause infrastructure concerns - improved habitat for lake trout in long term (no drawdowns) - reduced operational demands (potential to convert to non-operational structure) Ragged Lake Ragged Lake Annual Operating Limits - remote dam, boat access in summer and winter access by snowmobile or ski equipped aircraft in an emergency - dam partially failed and acting as an overflow weir (self regulating) - fall drawdown of 1.1 m by mid-september, no winter drawdown - maintain habitat conditions for lake trout and lake whitefish (fall drawdown not required if no winter drawdown) - recreational lake located within Algonquin Park, used mainly for canoeing - eliminate fall drawdown and allow lake to naturally regulate itself - improved ecological conditions will result from higher spring water level and gradual seasonal drawdown (spring to fall) - improved downstream minimum and base flow regime - improved habitat for lake trout in long term (no drawdowns) - reduced operational demands (maintain as a non-operational structure)

11 Canoe, Tea, Smoke, Wood Lakes and Matthias GS Canoe/Tea/Smoke Lakes Lower Muskoka Proposed Tea,Smoke & Canoe Lakes Annual Operating Limits - dam at outlet to Tea Lake controls water levels on Tea, Bonita, Canoe and Smoke lakes - dam operated in accordance with the Hackner-Holden Agreement - water levels and flows are controlled to meet recreation, navigation, spring flood control, winter power generation and fisheries needs - vehicular access in summer, access by foot in winter - summer operating range of 0.35 m for recreational purposes - no specific fall drawdown on the lakes, just gradual decline with spring water level 0.55 m lower than mid-october. - winter drawdown maintained for power production - minimum downstream flow release of 1.4 m 3 /s - lake trout lakes; Smoke Lake spawning shoals reported to be unaffected by the fall/winter drawdown; no information regarding effects to spawning shoals in Canoe Lake; no spawning is documented for Tea Lake - recreational lakes located within Algonquin Park, heavily used canoe route; extensive shoreline development, lake trout and smallmouth bass primary sport fish species - higher spring peak and gradual seasonal drawdown to improve ecological conditions for wetland species and spring spawning fish species - gradual decline in lake level over summer recreation season will improve downstream flows - lower end of summer levels (up to 20 cm lower) may cause recreational access and infrastructure concerns - less differential (0.2 m) between fall and winter drawdown levels to improve lake trout spawning habitat conditions (significantly more fall drawdown, slightly less winter drawdown) Wood Lake - summer water levels maintained for recreational purposes within a 0.3 m operating range - fall/winter drawdown of 0.56 m, beginning October 15 to provide storage for spring freshet - dam is not operated in the winter or spring (unless threat of spring flooding) - warm water lake (predominantly walleye, largemouth and smallmouth bass fishery) - extensive shoreline cottage development - no change to spring peak or fall/winter drawdown levels - very similar to the present operations (end of summer level 0.1 m lower) Matthias GS Headpond Wood Lake Annual Operating Limits Matthias GS Annual Operating Limits - operated by Orillia Power Corporation - normal operating range of 0.91m (292.91m to m); maximum possible range of 1.8 m - downstream release of 3 m 3 /s during walleye spawning period (for walleye spawning in South Falls bypass channel) - daily water level fluctuations and occasional larger drawdown - fish habitat issues associated with larger drawdown - maintain consistent spring release of 3 m 3 /s during walleye spawning period - no changes proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period)

12 Tretheway, Hanna Chute and South Falls GS Trethewey GS Headpond Lower Muskoka Proposed Trethewey GS Annual Operating Limits - operated by Ontario Power Generation - normal operating range of 0.91m ( m to m); maximum possible range of 1.68 m - maintain downstream release of 3 m 3 /s during walleye spawning period (for walleye spawning at South Falls bypass channel) - low water levels affecting boating and fish habitat - water level fluctuations - no changes proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period) Hanna Chute GS Headpond Hanna Chute GS Annual Operating Limits - operated by Ontario Power Generation - normal operating range of 0.39m ( m to m); maximum possible range of 1.95 m - maintain downstream release of 3 m 3 /s during walleye spawning period (for walleye spawning at South Falls bypass channel) - no issues identified - no changes proposed proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period) South Falls GS Headpond operated by Ontario Power Generation - normal operating range of 0.73m ( m to m); maximum possible range of 1.56 m - maintain downstream release of 3 m 3 /s into spillway bypass channel during walleye spawning period (for walleye spawning at base of bypass channel) - maintenance of consistent flow through walleye spawning area during spawning and incubation period (mid April to early June) - walleye spawning period can be extended due to temperature differences in Lake Muskoka - no changes proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period) South Falls GS Annual Operating Limits

13 Ragged Rapids GS, Moon Dam, Big Eddy GS, Go Home and Skeleton Lakes Bala Reach/Ragged Rapids GS and Moon Dam Lower Muskoka Proposed Ragged Rapids GS Annual Operating Limits - Ragged Rapids GS and Moon Dam are both operated by Ontario Power Generation - run-of-river operation with summer and winter operating ranges - normal summer (June 1 to October 15) operating range recently changed from m elevation (0.3 m range) to m elevation (0.27 m range) in response to resident concerns - normal winter operating range of 0.3 m (from m to m elevation) - flood damage zone occurs at m elevation, which corresponds to a flow of 283 m 3 /s, which results in a maximum operating range of 1.74 m - typically, a flow of approximately 84 m 3 /s is passed down Musquash River to Go-Home Lake if sufficient flow is available (flow in excess of this value can destabilize ice conditions on Go Home Lake which becomes dangerous to snowmobiles) - adequate, steady flow (42 m 3 /s if available, minimum of 14 m 3 /s) to be passed through the Moon dam and down the Moon River during walleye spawning and incubation period for 6 weeks (from April 15 to June 1) - maximum flow into Go Home Lake restricted to m 3 /s to avoid flooding/high flow conditions in that lake - fluctuating water levels during the summer recreation season - high water levels during high flow periods (spring freshet and summer storms) - essentially all flow from Muskoka watershed passes through this small area which can result in significant variation in flows and water levels - flow sharing between hydropower facilities and Moon River walleye spawning grounds during the spring walleye spawning period - minimum flow on Moon River during other periods - no additional changes proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period) Big Eddy GS Headpond Issues - variable flows downstream of facility are reported to affect boat access to seasonal properties - walleye spawning grounds at outlet of Musquash River into Go Home Lake - no changes proposed to headpond operations - upstream flow changes will increase flows available for hydropower generation during the April to October period and reduce the flows available for generation during the November to March period (reallocation from winter to summer period) Go Home Lake Big Eddy GS Annual Operating Limits - remote control dam, water access in summer, snowmobile or helicopter access in winter - dam operated to match seasonal flow changes at Bala and Moon River dams - normal summer operating range of 0.2 m for recreational uses - significant fluctuations in summer level (0.2 to 0.3 m) due to intermittent operation of upstream hydropower generation facilities - fall and winter drawdown to m elevation (0.78 m below summer level) commences in November and completed by mid-february - no winter operation of control dam - second dam on lake, located near the north end on the original lake outlet now functions as a porous filter dam, continuously releasing 1.4 m 3 /s into the downstream channel Skeleton Lake - overflow weir passes high flows (spring freshet, summer storms) - minimum downstream flow (0.4 to 0.2 m 3 /s) released through weir via low level valve - stable summer water levels for recreation with no fall drawdown - winter drawdown of 0.1 m to provide storage for spring freshet - operated by Ontario Power Generation - normal operating range of 0.95m (207.3 m to m); maximum possible range of 1.47 m - maximum flow into Go Home Lake of m 3 /s to avoid flooding/high flow conditions in that lake Skeleton Lake Annual Operating Limits Go Home Lake Annual Operating Limits No changes are proposed under the plan for these two structures