Canadian Dam Association Bulletin - Fall 2016 - 25

conditions, such as at Lake Major. The substrate for each pool will be either concrete or rock ballast. LAKE MAJOR ROAD BRIDGE The bridge at Lake Major road was rebuilt in 2010 but was not designed to accommodate the design spillway discharge at Lake Major Dam. Previous high discharge events at the current spillway structure noted backwater effects and conditions where the barrel of the bridge flowed nearly full. In order to dimension the gated structure in the hybrid concept such that it discharges up to approximately a 100 year inflow flood, a HEC-RAS model was prepared from the site of the new dam to a sufficient distance downstream of the Highway Bridge so that the effect of the bridge's back water could be evaluated. The analyses were carried out for flows ranging from 10 to 145 m³/s. The sensitivity of the results to differing values of channels slope was tested by assuming values of 0.25% and 0.44% respectively. Negligible differences were found between the resulting H-Q curves below the New Dam. The results determined that a flow of 105 m³/s (the routed out flow during the IDF) can discharge through the bridge barrel, although there would be negligible clearance to the bridge soffit. CULVERT LAKE MAJOR ROAD RECOMMENDED STRUCTURE The time to construction is a key decision criterion. The current Lake Major Dam sustained damage during a storm in 2014 and is currently repaired, but only in a temporary manner. The fishway is not functional and currently operated as a pumping system, which is working well, but is designed as a temporary solution. Time is essential in building a replacement structure. www.mavel.cz Construction of a dam immediately upstream of the existing dam is the best structural solution, while meeting current average demand. The gated concept and the hybrid concept provide for an additional 0.5m of storage in the reservoir to extend the capacity of the current system beyond the current yield. A replacement dam at location C will require a more rigorous environment process because, while it is replacing an existing structure, it is far enough upstream that it will likely be treated as a new structure. ■ HYDRO TURBINES Kaplan Francis Pelton 30 kW to 30+ MW 678727_Mavel.indd 1 For a replacement structure at Location F, in order to maintain a culvert approximately fifty (50) metres south of the existing dam, near Old German Road, a small control structure is required upstream of the existing culvert to maintain the flow design. The inlet control will be established in final design to allow comparable flow to what is currently discharged through the culvert. The culvert does not provide any benefit to operation of the reservoir and may be a legacy structure for the residents on the down gradient of the road. Removing the culvert may require upgrading of the road to act as a water retention structure, both for safety of the downstream residents Canadian Dam Association * Fall 2016 and to mitigate losses through seepage through the road fill. Benesov, CZ +420 317 728 483 info@mavel.cz Boston, MA USA +1 617 242 2204 americas@mavel.cz 1/29/14 3:26 AM Your Dam and hydropower specialist Knight Piésold specializes in dams for hydropower, mining and water storage, from VLWHLGHQWL¿FDWLRQFRQFHSWGHYHORSPHQW and detailed engineering to dam safety. Hydropower | PUMPED STORAGE | MINE TAILINGS | WATER STORAGE| FLOOD CONTROL (QJLQHHULQJDQG(QYLURQPHQWDO&RQVXOWDQWV 826317_Knight.indd 1 www.knightpiesold.com 11/08/16 25 12:41 AM http://www.mavel.cz http://www.mavel.cz http://www.knightpiesold.com http://www.knightpiesold.com

Table of Contents for the Digital Edition of Canadian Dam Association Bulletin - Fall 2016

Board of Directors
Board of Directors Nominations
Remedial Work at Lake Major Dam
CDA Conference Report: Otto Holden Generating Station Alkali-Aggregate Reaction Investigation
DSR Bulletin
Icold Corner
Notice of Annual General Meeting
Call for Papers, 2017 Conference
Young Professional Activities
Buyers’ Guide and Trade List
Canadian Dam Association Bulletin - Fall 2016 - cover1
Canadian Dam Association Bulletin - Fall 2016 - cover2
Canadian Dam Association Bulletin - Fall 2016 - 3
Canadian Dam Association Bulletin - Fall 2016 - 4
Canadian Dam Association Bulletin - Fall 2016 - 5
Canadian Dam Association Bulletin - Fall 2016 - 6
Canadian Dam Association Bulletin - Fall 2016 - Board of Directors
Canadian Dam Association Bulletin - Fall 2016 - 8
Canadian Dam Association Bulletin - Fall 2016 - Board of Directors Nominations
Canadian Dam Association Bulletin - Fall 2016 - Remedial Work at Lake Major Dam
Canadian Dam Association Bulletin - Fall 2016 - 11
Canadian Dam Association Bulletin - Fall 2016 - 12
Canadian Dam Association Bulletin - Fall 2016 - 13
Canadian Dam Association Bulletin - Fall 2016 - 14
Canadian Dam Association Bulletin - Fall 2016 - 15
Canadian Dam Association Bulletin - Fall 2016 - 16
Canadian Dam Association Bulletin - Fall 2016 - 17
Canadian Dam Association Bulletin - Fall 2016 - 18
Canadian Dam Association Bulletin - Fall 2016 - 19
Canadian Dam Association Bulletin - Fall 2016 - 20
Canadian Dam Association Bulletin - Fall 2016 - 21
Canadian Dam Association Bulletin - Fall 2016 - 22
Canadian Dam Association Bulletin - Fall 2016 - 23
Canadian Dam Association Bulletin - Fall 2016 - 24
Canadian Dam Association Bulletin - Fall 2016 - 25
Canadian Dam Association Bulletin - Fall 2016 - CDA Conference Report: Otto Holden Generating Station Alkali-Aggregate Reaction Investigation
Canadian Dam Association Bulletin - Fall 2016 - 27
Canadian Dam Association Bulletin - Fall 2016 - 28
Canadian Dam Association Bulletin - Fall 2016 - 29
Canadian Dam Association Bulletin - Fall 2016 - 30
Canadian Dam Association Bulletin - Fall 2016 - 31
Canadian Dam Association Bulletin - Fall 2016 - 32
Canadian Dam Association Bulletin - Fall 2016 - 33
Canadian Dam Association Bulletin - Fall 2016 - 34
Canadian Dam Association Bulletin - Fall 2016 - 35
Canadian Dam Association Bulletin - Fall 2016 - 36
Canadian Dam Association Bulletin - Fall 2016 - 37
Canadian Dam Association Bulletin - Fall 2016 - DSR Bulletin
Canadian Dam Association Bulletin - Fall 2016 - Icold Corner
Canadian Dam Association Bulletin - Fall 2016 - 40
Canadian Dam Association Bulletin - Fall 2016 - Notice of Annual General Meeting
Canadian Dam Association Bulletin - Fall 2016 - Call for Papers, 2017 Conference
Canadian Dam Association Bulletin - Fall 2016 - 43
Canadian Dam Association Bulletin - Fall 2016 - Young Professional Activities
Canadian Dam Association Bulletin - Fall 2016 - Buyers’ Guide and Trade List
Canadian Dam Association Bulletin - Fall 2016 - 46
Canadian Dam Association Bulletin - Fall 2016 - cover3
Canadian Dam Association Bulletin - Fall 2016 - cover4
Canadian Dam Association Bulletin - Fall 2016 - outsert1
Canadian Dam Association Bulletin - Fall 2016 - outsert2
Canadian Dam Association Bulletin - Fall 2016 - outsert3
Canadian Dam Association Bulletin - Fall 2016 - outsert4
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