Canadian Dam Association Bulletin - Fall 2016 - 18

The replacement dam will continue to be a water supply dam with some functional modifications. The proposed structure is intended to meet functional, technical and aesthetic requirements of Halifax Water and the residents of Dartmouth. Functional requirements of the replacement dam are similar to the existing dam. The structure is required to 1. Maintain a riparian flow for fish species in the river upstream and downstream of the dam and as a means of 752916_Teledyne.indd 1 egress for the fish species to connect the two ecosystems. 2. Retain as much water as possible and only spill during periods of excess inflow. The current Lake Major System does not have multiyear storage and all water is either consumed by customers, discharged as riparian flow, or as spill over the spillway crest. 3. Safely discharge an inflow design flood (IDF) with a peak equal to the 1,000 year flood plus one-third the difference between a flood with an 6/16/15 The Industry Leader in Grouting Equipment 18 821831_ChemGrout.indd 1 annual exceedance probability of 1,000 years and a probable maximum flood (PMF). Safe discharge is defined, in part, as a maximum reservoir water level during the IDF that allows adequate freeboard at the abutments. The structure is required to discharge the IDF such that the maximum water level during the IDF does not unduly infringe on residents located at the perimeter of Lake Major or the Lake Major pumping station. The technical requirements of the replacement dam are similar to the existing dam. For rigid structures, an adequate factor of safety is required for different load combinations defined in the CDA Guidelines, as well as other foreseeable load combinations that may or may not be included in the Guidelines. Likewise, the resultant of all forces should be in the middle third of the base for normal load conditions and the middle half for all other loading events. All structures shall have adequate freeboard to mitigate against external erosion, erosion of the foundation and erosion of the shell. Special considerations for frost penetration, vertical and horizontal deformation, and susceptibility to vibration loading are required, where these conditions prevail. For embankment structures, the dam will have an adequate factor 1:02 AM of safety for slope stability, adequate freeboard at the crest and adequate internal controls to mitigate risk of internal erosion of the dam and foundation. The aesthetic requirements of a dam are less well defined. Architecturally, while buildings are defined by proportions, infrastructure tends to be defined by contrasts in geometry through parallelism, orthogonality, repetition, with linear or curved structures presenting the greatest confidence. The visual projection can either stand out, or blend in, but it should always appear neat, articulate and balanced. Successful structures fit into an environment, either by enhancing it or by blending in. View past issues of the CDA Bulletin 25/08/16 12:27 AMonline at www.naylornetwork.com/cda-NXT/ http://www.blueview.com/?utm_medium=print&utm_source=Canadian_Dam_Association_Bulletin&utm_campaign=BW_product_promotion_Q416&utm_content=homepage http://www.blueview.com http://www.chemgrout.com http://www.chemgrout.com http://www.naylornetwork.com/cda-NXT/

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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