https://declassified.library.utoronto.ca/files/original/25ed36b2c4545c90724898d541d9df00.pdf 7999349e25e93706983d87b61b96a311 PDF Text Text Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information 4 JIBTS 200-2113-2 TWIT h smn TOP SECRET CANADIAN EYES ONLY ATOMIC VULNERABILITY STUDY OF CANADA CITY OF HALIFAX I Object of the Study This is one of a series of reports on major Canadian cities and targets which provide the basic information on enemy capabilities to cause damage to persons and to Vital Points by atomic attack. This study is not concerned with the probability that such an enemy attack will be made. II Definitions of Terms Used HI Ground Zero The point on the ground directly under the point of burst in the air Aiming Point The point on the ground directly under the point where the bomb is aimed to be burst in the air No Rescue No organized and trained rescue is carried out, which means effectively that only people who are not trapped or who can escape by their own efforts survive Seriously Injured - Hospitalized persons who would not report to work for a considerable period of time Ligiitly Injured - First Aid cases who would be able to contribute to their work a few days after the attack Nighttime - The time during which people are in their normal places of residence Daytime - The time during which people are at their normal places of work Sources of Basic Information (a) population Information on the distribution of daytime and nighttime population in Halifax was obtained from the Civil Defenoe Director of the city of Halifax. (b) Military Establishments The military establishments important to the national war effort were selected by the Joint Planning Coiiuuittee. The Establishment in the Halifax area is listed in Appendix "A". 000620 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 2 (c) Vital Points Information on other Vital Points was taken from the 1953 List of Vital Points, which is the work of the Interdepartmental Committee on Vital Points. The list for the Halifax area is given in Appendix "A". (d) Scientific Data Basic data on the effects of atomic bomb explosions on people and structures was prepared by the Defence Research Board (Scientific Adviser to the Civil Defence Co-ordinator). IV Factors Considered in Selecting Aiming Points for Study The effects of an attack on a city vary widely with the location of the bomb burst. As it is not considered practicable to study all possible points of burst, a series of Aiming Points have been selected which are calculated to give the maximum effect on population and on different groupings of Vital Points. n ... The effects of an attack vary widely with the energy released by the bomb. As it is not possible to estimate the energy level of the bomb mpet likely to be used, separate animates war's mMde for k bbfiib *ith the lowest probable energy and the highest probablo energy level. The effects on people also vary widely with circumstances of warning and rescue. A series of estimates were therefore made for different conditions of warning and rescue. The estimates made for conditions WITH RESCUE are for ideal rescue conditions with organized and trained rescue teams, in temperate climates and when the atomic attack is unsupported by other weapons. In spite of rescue efforts casualties would tend towards those given for NO RESCUE under severe winter conditions, or if Chemical Warfare attack were combined with atomic attack or if the spread of fire were extensive. Conditions of visibility would also alter the effect of an attack. Poor visibility would reduce the extent of fire and the number of radiation casualties and would have some effect on the chances of pinpointing the target from the air. All calculations are based on an average clear day over a city with a visibility of about six miles. For the city of Halifax Aiming Points were chosen to give the maximum effect on the daytime and on the nighttime distribution of population; and to give the maximum effect on the Vital Points considered collectively. Aiming Points were also chosen to give the maximum effect on the installations at HMC Dockyard and the facilities at the Ocean Terminals. When selecting the Aiming Points to give the maximum effect on Vital Points considered collectively, those at Imperoyal and Eastern Passage were not included - they are beyond the range of destruction of all the Aiming Points selected. 000621 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY '« 3 «* The present study i s confined t o t h e effect of a bomb delivered by an airborne vehicle. I t i s possible t h a t Halifax, a Port City with important Naval I n s t a l l a t i o n s , would be a t a r g e t for an underwater bursty A separate study w i l l be made of the effects of t h i s type of a t t a c k . IV Results of the Study of the City of Halifax A daytime attack on t h i s c i t y by an a i r burst atomic bomb could insult i n c a s u a l t i e s among 55-70$ of the population if a 20 kiloton bomb were used, depending on conditions of warning and rescue; and 70-90$ if a 100 kiloton bomb were used; and cause damage t o many Vital Points i n Halifax. An a t t a c k on Vital Points by a 20 kiloton bomb would cause c a s u a l t i e s among 50-55$ of t h e population; 70-90$ i f a 100 kiloton bomb were used. Approximately 40-60$ of population would become c a s u a l t i e s i f a 20 kiloton bomb were used against HMO Dockyard; 55-80$ i f a 100 kiloton bomb were used* An a t t a c k on the Ocean Terminals and f a c i l i t i e s would r e s u l t in 30-45$ c a s u a l t i e s by a 20 kiloton bomb; 55-75$ by a 100 kiloton boirib. In a l l cases damage to Vital Points would be high. A nighttime attack by ah airborne atomic bomb could r e s u l t i n c a s u a l t i e s among 55-75$ of the population* depending on conditions of warning and rescue; 75-95$ i f a iOO kiloton bomb were used. An attack on V i t a l poihts by a 20 Kiloton bouin would cause c a s u a l t i d s among 45^60$ of the popvilation; 65-90$ it a 100 kiloton bomb were used. Approximately 40-60$ of the population would become c a s u a l t i e s i s a 20 kiloto n bomb were used against HMC Dockyard; 60-85$ if a 100 kiloton bomb were used. An a t t a c k on the Ocean Terminals and f a c i l i t i e s would r e s u l t i n 25-40$ c a s u a l t i e s by a 20 kiloton bomb; 50-60$ by a 100 kiloton bomb. In a l l cases damage t o Vital Points would be high. (a) Effects on Population The effect of an attack on the daytime and nighttime population is given in Tables I and II for each Aiming Point and for different conditions of warning and rescue, (b) Effects on Vital Points A summary of the effect on Vital Points is given in Table III for each Aiming Point. The extent of damage to Vital Points and the effect on their various functions is also described below for each of the Aiming Points. The relative importance of each Vital Point to the Canadian - U.S. war effort is indicated by the category (AA, A, B, or C ) , vihich is given for each Vital Point in Appendix "A". A definition of each of the categories is also given in Appendix w A n . �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 4 (c) Detailed Discussion of an Attack on iiach of the Aiming Points Effeot of a Burst over Aiming Point #I-D - Chosen to give maximum effect on population by a 20 kiloton bomb A daytime attack on this Aiming Point would cause casualties among 55-70$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B No damage other than superficial would be caused to the building or-contents by blast and the probability of fire is low, Approxiuately 5-10$ of the shift on duty would be seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A No damage other than superficial vovLlfcl be caused to the shops or equipment by blast and the probability of fire is lowi Less than 5$ of the shift on duty would be seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Slight structural building damage v«ould be caused by blast and the probability of fire is low. It is likely that most equipment would not be damaged. Less than 5$ of the shift on duty would be seriously injured. Electric Power Fuel Station, Nova Scotia Light and Power Station - Category A Building and equipment would be t o t a l l y destroyed by b l a s t and f i r e . Approximately 30-65$ of t h e shift on duty would be k i l l e d or seriously injured. Coromunicat ions - Telephonic Maritime Telephone And Telegraph Company, Main Exchange Category A Building and contents would be totally destroyed by blast and fire. Approximately 95-100$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunication Corp. Category A Very severe structural damage would be caused by blast and fire would probably cause complete destruction. Approximately 95-100$ of the shift on duty would be killed or seriously injured. 000623 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY ** 5 *"• Po-Tt of Halifax (excluding Naval Facilities) Wharves ahd Piers No serious blast damage would be caused to any wharves and piers by this attack. Transit Sheds Severe damage would be caused to transit sheds. Damage to the most important sheds only is described below. Destroyed - transit sheds # 25 and 28 on Pier A, sheds # 23 and 24, sheds # 20 and 21 and 22 on Seawall; sheds on iPier 2, Pier 3, Pier 4 and the sheds of Furness Withy and Acadia Sugar would be destroyed by blast and fire. Serious damage - would be caused to the sheds # 26, 27 and 28 on Pier A, and Dartmouth Pier, by blast and fire. Moderate damage - would be caused to the sheds on Pier B,' Pier 9 and 9A, and Jetty # 6. Coal and Oil Bunkering No serious damage would be caused to any of the Coal & Oil jetties or bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type Of attack. No damage would be caused to the floating Dry. Dock, Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage No structural blast damage is likely to be caused either to the National Harbour Board Grain Elevator or boid Storage plant but the probability of fire damage to both is high. Shippi.ng (transports, light cruisers and aircraft carriers) Sunk - no ships would be sunk or destroyed by this attack. Immobilized - only ships berthed at the Cunard'. Pior might be immobilized. Slight damage - ships berthed between Pier B on the east and Pier 4 on the west or anchored between these limits in the Halifax side of .the channel would receive slight damage to superstructure and external equipment. HMO Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most importantbuildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters, The most important Stores are buildings # 40, 40A, 44 and 66 all of which contain vital Naval Stores. Buildings # 17 and 18 Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 - the Shipwright Boat Shop, Building # 105 - Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general the effect of blast on the buildings in this area would not be severe and the probability that serious fire damage would be caused is not high. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 6 Administration Flag Officer Atlantic Command Headquarters - this building would not be damaged structurally by blast and the probability of damage from fire is low. Stores Moderate structural damage would be caused to building # 66 and stores by blast and fire. No blast damage other than superficial would be caused to buildings # 40, 40A and 44 and the probability of fire is low. Workshops Serious damage would be caused to Shipwright's Boat Shop (building # 59) and equipment if fire were to occur. Moderate damage would be caused to buildings # 17, 18, 19, 105 and 108. Wharves and Piers No serious blast damage would be caused to the Royal Canadian Naval Jetties by this attack. HMCS Stadacona In general the effect of blast on buildings in this area wbuld not be serious and the probability of seriovts fire damage is not high* Naval Armament t)efc04t *• Dartmouth No serious damage would be caused by blast or fire* Effeot of a Burst Over Aiming point ,fep - .Ckogsh to give maximum effect on population by a 100 Kiloton bomb A daytime attack on this Aiming Point would cause casualties among 70-90$ of the population depending on conditions of warning and rescue (Tables I and II), Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B Moderate structural damage would be caused by blast and there is a probability of further damage to the building and contents from fire. Approximately 15-30$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Severe structural damage would be caused by blast and there is a probability of further damage to the shops and equipment from fire. Approximately 15-30$ of the shift on duty would be killed or seriously Halifei Shipyards Limited (Dartmouth) - Category A Severe structural damage would be caused by blast and there is a probability of further damage to the Shops and equipment from fire. Approximately 5-10$ of the shift on duty would be killed or seriously injured. 000625 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 7 Electric Power Fuel Power Station, Nova Scotia Light and Power Station Category A Building and equipment would be t o t a l l y destroyed by t h i s attack . Approximately 65-90$ of the s h i f t on duty would be k i l l e d or seriously injured. Communications - Telephonic Maritime Telegraph and Telephone Co, Main Exchange Category A Building and contents would be destroyed by blast and fire. Approximately 95-100$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A Building and contents would be destroyed by blast ahd fire* Approximately 95-100$ of the shift on duty would be killed or seriously injured* Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious blast damage would be caused to wharves and piers. Transit Sheds Alirid&t a l l t r a n s i t sheds would be coinpletely destroyed by blast and fire. Coal,and Oil Bunkering Little oi1 no serious damage would be caused to the maj oi1 bunkSring facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described above. Shipping (transports, light cruisers and aircraft carriers) Sunk - no ships would be sunk or destroyed by this attack. Immobilized - all ships berthed or anchored between Pier 2 on the west and Berth 30 on the east would be immobilized. Slight damage - all ships berthed or anchored within Halifax Harbour westward to the Graving Dock of Halifax Shipyards Limited would receive slight damage to superstructure and external equipment. HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important stores are Buildings # 40, 4QA, 44 and 66 all of which contain vital Naval Stores. Building # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 - the Shipwright Boat Shop, Building # 105 - Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. 000626 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 8 In general the effect of blast on buildings in this area would range from slight (well constructed multistorey structure) to severe (workshops, sheds etc)* There is a probability of serious fire damage in this area. Administration Flag Officer Atlantic Command Headquarters - slight structural damage would be caused by blast but there is a probability of further damage to building and contents from fire. Stores Serious damage would be caused to the most important stores buildings by a combination of blast and fire. Workshops Damage to the most important workshops and equipment would range from serious to total. Wharves and Piers No serious damage would be caused to the Royal Canadian Navy Jetties by this attack. HMCS Stadacona In general the structures in this area would receive from slight to moderate structural damage from blast and there is a probability of serious damage from fire. Naval Armament Depot Slight structural building damage wauld be caused by blast and there is a probability of further damage to buildings and contents from firet Effect of a Burst over Aiming Point #I-N - Chosen to give maximum effeot on nighttime distribution of population by a 20 kiloton bomb A nighttime attack on this Aiming Point would cause casualties among 50-75$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B Building and contents would be destroyed by blast and fire. Approximately 30-65$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Severe structural damage would be caused by blast and there is a probability of further damage to shops and equipment from fire. Approximately 60-70$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A No serious damage would be caused by blast or fire. Less than 5$ of the shift on duty would be killed or seriously injured. 000627 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 9 Electric Power Fuel Power Station, Nova Scotia Light & Power Station Category A Slight structural damage would be caused by blast and there is a probability of further damage to plant and equipment frcm fire. Approximately 10-20$ of the shift on duty would be killed or seriously injured. Communications - Telephonic Maritime Telegraph & Telephone Company, Main Exchange Category A No serious damage would be caused by blast but there is a probability of damage from fire. Approximately ,5-10$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A No serious damage would be caused by blast but there is a probability of damage from fire. Approximately 5-10$ of the shift on duty would be killed or seriously injured. Port of Halifag (excluding Naval Facilities) Wharves ana Piers No serious blast damage woiild be caudfed to atiy wharves and piers* Transit Sheds Damage to transit sheds could generally be described as moderate. Damage to the most important sheds only is described below: Destroyed - the shed on Pier # 6 would be destroyed by this attack. Serious damage would be caused to sheds on Pier 4, Piers 9 and 9A and Dartmouth Pier. Moderate damage - would be caused to sheds # 25 and 28 on Pier A, to sheds # 23 and 24, and the Irving Oil shed. Slight Damage - would be caused to shed # 20 on the Seawall and Acadia Sugar shed. Little or no damage would be caused to other major sheds in Halifax, Coal and Oil Bunkering No serious blast damage would be caused to any of the Coal or Oil jetties or bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described abow. Grain Elevators and Cold Storage No serious blast damage would be caused to either the Grain Elevator or Cold Storage Plants and the probability of fire is low. Shipping (transports, light cruisers and aircraft carriers) Sunk or immobilized - ships berthed between the Machine Shop Wharf on the west and the jetty of Furness Withy on the east or anchored between these limits in the Halifax side of the channel wouldfceceiveslight damage to superstructure and external equipment. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - i o ii HMC Dockyard For the purpose of this attack the buildings in this area have been grouped iinder the headings of Administration/ Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores are Buildings # 40j 40A, 44 and 66 all of which contain Vital Naval > Stores. Buildings # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 the Shipwright Boat Shop. Building # 105 - Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general the effect of blast on buildings in this area would range from slight (well constructed multistorey structure) to serious (single storey buildings shops) and there is a probability that a serious fire might occur. Administration Flag Officer Atlantic Command Headquarters - this building wbuld receive only slight structural damage frbin blast but there is a probability of serious damage to buildings and contents from fire* Stores No structural blast damage would be caused to building # 66 but slight structural damage would be caused to building^ # 40, 40A and 44. There is a probability of serious fire damage to all these buildings. Workshops All important workshops and equipment would be seriously damaged by blast and fire. Wharves and Piers No serious damage would be caused to the Royal Canadian Navy Jetties by blast. HMCS Stadacona In general building damage in this area would range from moderate (well constructed multi-storey buildings) to severe (single storey structures). Naval Armament Depot No serious blast damage would be caused and the probability of fire damage is not high. Effect of a Burst over Aiming Point #I-N - Chosen to give maximum effect on nighttime distribution of population by a 100 kiloton bomb A nighttime attack on this Aiming Point would cause casualties among 75-95$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below: 000629 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 11 Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B Plant and equipment would be totally destroyed by blast and fire. Approximately 65-85$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Shops and equipment would be destroyed by blast and fire. Approximately 80-85$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Severe structural damage would be caused by blast and there is a probability of further damage to shops and equipment from fire;. Approximately 5-10$ of the shift on duty would be killed or seriously injured. jflfrdtrid, t'ow.^r Fuel Power Station, Nova Scotia Light & Power Station Category A Very severe structural damage i/rould be caused by blast and there is a probability that fire would cause complete destruction. Approximately 35-60$ of the shift on duty would be killed or seriously injured. Communications - Telephonic Maritime Telegraph and Telephone Company, Main Exchange Category A Moderate structural damage would be caused by blast and the probability of serious fire damage is high. Approximately 10-15$ of the shift on duty would be killed or seriously injured. Comiuuni cat ions - Transmission and Reooption Cable Station, Canadian Overseas Telecommunications Corporation - Category A Serious structural damage would be caused by blast and the probability of further damage from fire is high. Approximately 10-15$ of the shift on duty would be killed or seriously injured. Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious damage would be caused to wharves and piers by this attack. Transit Sheds Moderate damage to the most important sheds only is described below: Destroyed - sheds # 25 and 28 on Pier A, sheds # 23 and 24, sheds on the Dartmouth Pier and Piers # 9 and 9A and Jetty # 6, and the sheds of Irving Oil and Acadia Sugar would be destroyed by this attack. Serious damage - would be caused to shed # 29, sheds # 20, 21 and 22 on the Seawall, the sheds on Pier # 3, and of Furness Withy would be severely damaged by blast and fire. Moderate damage - would be caused to the transit shed on Pier B, and sheds # 26 and 27 on Pier A. Slight damage - would be caused to the shed on Pier 2. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 12 Coal and Oil Bunkering No serious blast damage would be caused to any of the Coal or Oil jetties or bunkering facilities. Shipbuilding and Repairing The Graving Dock vrould not be damaged by this type of attack. No damage would be caused to the floating Dry Dock, Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage No structural blast damage would be caused to the Grain Elevator but there is a probability of serious damage to the National Harbour Board Cold Storage Plant from both blast and fire. Shipping (transports, light cruisers and aircraft carriers) Sunk - no ships would be sunk or destroyed by this attack. Immobilized - ships berthed or anchored between Pier 2 on the east and the jetties of HMC Dockyard would be seriously damaged or immobilized. Slight damage - all ships berthed or anchored east of Pier A on the Halifax side of the Harbour and the jetties of Halifax Shipyards Limited on the Dartmouth side would receive slight damage to superstructure and external equipment. HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores ase Buildings # 40, 4QA, 44 and 66 all of which contain Vital Naval Stores. Buildings # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 - the Shipwright Boat Shop. Building # 105 Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general the effect of blast alone on buildings would be severe and there is a high probability of fire. Admi ni st r ati on Flag Officer Atlantic Command Headquarters - this building would receive serious structural damage from blast and there is a high probability of further damage to building and contents from fire. Stores Moderate to severe structural building damage would be caused by blast and the probability of further serious damage to building and stores would be high. Workshops Workshops and equipment would receive from severe to total damage from blast and fire. Wharves and Piers No serious blast damage would be caused to Royal Canadian Naval Jetties with the exception of Jetty 2. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP 3ECRET CANADIAN EYES ONLY - 13 HMCS Stadacona Most buildings in this area would be destroyed by blast and fire. Naval'. Armament Depot - Dartmouth Buildings in this area would receive moderate structural damage from blast and there is a probability of further damage from fire. Effect of a Burst over Aiming Point # 2 - Chosen to give maximum effect on Vital points by a 20 Kiloton bomb A daytime attack on this Aiming Point would casualties among 50-55$ of the population depending on tions of warning and rescue. A nighttime attack would casualties among 45-60$ of the population depending on tions of warning and rescue (Tables I and II). cause condicause condi- Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B No structural damage would be caused by blast but there is a probability of damage from fire. Approximately 10-20$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Moderate structural damage would be caused by b]ast and there is a probability of further damage to shops and equipment from fire. Approximately 5-10$ of the shift on duty would be killed or seriously injured, Halifax Shipyards Limited (Dartmouth) - Category A Serious structural damage would be caused by blast and there is a probability of further damage to shops and equipment from fire. Approximately 5-10$ of the shift on duty would be killed or seriously injured. Electric Power Fuel Power Station, Nova Scotia Light & Power Station Category A Building and equipment would be destroyed by a combination of blast and fire. Approximately 30-65$ of the shift on duty would be killed or seriously injured. Communications - Telephonic Maritime Telegraph and Telephone Company, Main Exchange Category A Severe structural damage would be caused by blast and the probability of further damage to building and equipment is high. Approximately 15-25$ of the shift on duty would be killed or seriously injured. 000632 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 14 Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A Severe structural damage would be caused by blast and the probability of further damage from fire is high. Approximately 45-65$ of the shift on duty would be killed or seriously injured. Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious blast damage would be caused to wharves and piers with the exception of pier 4. Transit Sheds Damage to the most important sheds only is described below. Destroyed - sheds # 25 and 28 on Pier A, sheds # 23 and 24, the sheds on Pier 2, Pier 3, Pier 4, Jetty § 6 and Dartmouth Pier and the sheds of Acadia Sugar would be destroyed. Serious damage - would be caused to sheds # 20 and 24 on the Seawall, and the sheds on Pier 9 and 9A and Dartmouth Pier. Moderate damage - would occur to sheds # 22 on the Seawall. Slight damage - would be caused to shed # 29, sheds # 26 and 27 on Pier A, and the shed on Pier B. Coal and Oil Bunkering No serious blast damage would be caused to any of the Coal or Oil jetties or bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage No structural damage would be caused by blast to either the National Harbour Grain Elevator or Cold Storage facilities but there is a probability of damage from fire. Shipping (transports, light cruisers and aircraft carriers) Sunk - ships berthed at Piers 2 and 3, and 4 would be sunk or destroyed. Immobilized - ships berthed or anchored between the Furness Withy Jstty on the east and HMC Dockyard on the west would be immobilized by this attack. Slight damage - ships berthed or anchored between the Cunard Wharf on the east and Jetty # 6 on the west would receive slight damage to superstructure and external equipment. HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores are Buildings # 40, 40A, 44 and 66 all of which contain vital Naval Stores. Buildings # 17 and 18 - Combined Electric �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP .SECRET CANADIAN EYES ONLY ii 15 "» Shops, Building # 1 9 - the North Machine Shop* Building # 59 - the Shipwright Boat Shop^ Building # 105 - Boiler and Plate Shop and Building # 108 Combined Shop make up the most important Workshops. I n general the effect of blast on buildings in this area would range from slight (single storey shops and sheds) to total and there is a probability that serious fire would occur. Administration Flag Officer Atlantic Command Headquarters - slight structural blast damage would occur but there is a probability of damage to building and contents from fire. Stores Stores building # 66 would be destroyed b y blast and fire. Buildings # 4 0 , 40A and 4 4 would receive slight structural blast damage but there is a probability of damage t o buildings and contents from fire. Wharves and Piers No serious blast damage would be caused by this attack. HMCS Stadacona Moderate structural damage xrould be caused b y blast to buildings in this area and there is a probability that fire would occur. Naval Armament D6.-,ot - Dartmouth N o serious blast damage would be caused and the probability of fire damage is not high. Effeot of a Burst over Aiming Point # 2 - Chosen t o give maximum effect o n Vital Points b y a 1 0 0 Kiloton bomb A daytime attack o n this Aiming Point would cause casualties among 70-90$ of the population depending o n conditions of warning and rescue. A nighttime attack would cause casualties among 65-90$ of the population depending on conditions of warning and rescue (Tables I and I I ) , Damage t o Vital Points is described below: Aircraft and Aircraft Parts Oossor (Canada) Limited - Category B Moderate structural damage would b e caused b y blast and there is a probability of further damage to building and contents from fire. Approximately 25-60$ o f t h e shift o n duty would b e killed o r seriously injured. Shipbuildi ng and Repairing Halifax Shipyards limited (Halifax) - Category A Shops and equipment would be destroyed b y blast and fire. Approximately 15-30$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Shops and equipment vould be destroyed b y blast and fire. Approximately 15-30$ of the shift o n duty would b e killed or seriously injured. 000634 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 16 Electric Power . Fuel Power Station - Nova Scotia Light and Power Station Category A Building and equipment would be destroyed. Approximately 65-90$ of the shift on duty would be killed or seriously injured. Communications - Telephonic Maritime Telegraph and Telephone Company, Main Exchange Category A Building and equipment would be destroyed by blast and fire. Approximately 45-65$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A Building and equipment would be destroyed by blast and fire. Approximately 95-100$ of the shift on duty would be killed or seriously injured. Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious structural blast damage would be caused except to Pier 4 and the Acadia Sugar Jetty. Transit Sheds All the important transit sheds would be destroyed by blast and fire with the exception of the sheds on Pier B and sheds of Irving Oil which would be seriously damaged. Coal and Oil Bunkering Little or no serious damage would be caused to the major bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage Structural blast damage to the National Harbour Board Grain Elevator and Cold Storage facilities would not be serious but there is a probability of damage to both from fire. Shipping (transports, light cruisers and aircraft carriers) Sunk - ships berthed between the HMC Dockyard and the Furness Withy would be sunk. Immobilized - ships berthed or anchored east of Cunard Wharf and the Graving Dock would be immobilized by this attack. Slight damage « ships berthed or anchored in the harbour or channel east of Pier 4 would receive slight damage to superstructure and external equipment. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 17 HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores are Buildings # 40, 40A, 44 and 66 all of which contain vital Naval Stores. Buildings # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 - the Shipwright Boat Shop, Building # 105 Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general structural blast damage in this area would range from serious (well constructed multistorey structures) to total (single storey buildings stores) and there is a high probability that serious fire would occur. Administration Flag Officer Atlantic Command Headquarters - serious blast damage would be caused and there would likely be further serious damage from fire. Stores Stores building # 66 would be destroyed by blast. Buildings # 40, 4QA and 44 would receive moderate structural damage from blast and the probability of further damage from fire is high. Workshops All workshops and equipment would be totally destroyed by blast and fire. HMCS Stadacona Buildings in this area would receive serious! structural damage from blast and there is a high probability of fire. Naval Armament Depot - Dartmouth Buildings in this area would receive moderate structural damage from blast and the probability of fire is high. Effect of a Burst over Aiming Point # 3 - Chosen to give maximum effeot on BMC Dockyard by a 20 kiloton bomb A daytime attack on this Aiming Point would cause casualties among 40-60$ of the population depending on conditions of warning and rescue. A nighttime attack would cause casualties among 40-60$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below* �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 18 Aircraft and Aircraft Partis Cossor (Canada) Limited - Category B Slight structural damage would be caused by blast but therS is a probability of damage to the building and contents from fire. Approximately 10-20$ of the shift on duty would be killed or seriously injured. Shipbuilding and-Repairing Halifax Shipyards Limited (Halifax) - Category A Shops and equipment would be destroyed by blast and fire. Approximately 60-70$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Severe structural damage would be caused by blast and there is a probability of further damage from fire. Approximately 60-70$ of the shift on duty would be killed or seriously injured. Electric Power Fuel Power Station, Nova Scotia Light and Power Station Category A Slight s t r u c t u r a l damage would be caused by b l a s t and there i s a probability of further damage t o building and contents from f i r e . Approximately 10-20$ of the shift on duty vould. be k i l l e d or seriously injured. Communications - Telephonic Maritime Telegraph and Telephone Company - Category A Little or no serious damage would be caused by blast but there is a probabioity of damage from fire. Approximately 5-10$ of the shift on duty vould be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A Slight structural damage would be caused by blast but the probability of damage from fire is high. Approximately 15-30$ of the shift on duty would be killed or seriously injured. Port of Halifax (excluding Naval Facilities) Wharves and Piers Pier 4 would receive serious damage from blast. Other major piers and wharves would not be seriously damaged. Transit Sheds Damage to the most important sheds only is described below: Destroyed - sheds on Piers 3 and 4, Piers 9 and 9A, Jetty # 6 and the sheds of Acadia Sugar and Furness Withy would be destroyed by blast or fire. Serious damage - would be caused to the shed on Pier 2, Moderate damage - would be caused to transit sheds # 25 and 28 on Pier A, sheds # 23 and 24 and the sheds of Irving Oil would be moderately damaged by blast and fire. Little or no damage would be caused to sheds # 26 and 27 on Pier A and sheds # 2 0 , 21 and 22 on the Seawall, 000637 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY ** 19 « Coal and Oil Bunkering Little or no serious damage would be caused to the major bunkering facilities. Shipbuilding ahd Repairing The Graving Dock would not be damaged by this type of attack* No damage would be caused to the floating Dry Dock, Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage Little or no damage would be caused to either the Grain Elevator or the National Harbour Board Cold Storage facilities. Shipping (transports, light cruisers and aircraft carriers) Sunk - all ships berthed or at anchor in the vicinity of the HMC Dockyard Jetties would be sunk or destroyed. Immobilized - ships berthed or anchored between Pier 2 on the east and the Machine Shop Wharf on the west would be immobilized. Slight damage - ships berthed between the jetty of Furness Withy on the east and Jetty # 7 on the west or anchored in the harbour within these limits would receive slight damage to superstructure and external equipment. HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops, Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores are Buildings # 40, 40A, 44 and 66 all of which contain vital Naval Stores. Buildings # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 the Shipwright Boat Shop, Building # 105 - Boiler and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general the effect of this attack on HMC Dockyard would be complete destruction of buildings from blast alone and serious damage would be caused to all jetties with the exception of Jetty # 3. HMCS Stadacona The buildings in this area would be destroyed by blast and fire. Naval Armament Depot - Dartmouth Almost total structural damage would be caused to buildings and equipment by this attack. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 20 Effect of a Burst over Aiming Point # 3 - Chosen to give maximvim effect on HMC Dockyard by a 100 Kiloton bomb A daytime attack on this Aiming Point would cause casualties among 55-80$ of the population depending on conditions of warning and rescue. A nighttime attack would cause casualties among 60-85$ of the population depending on conditions of warning and rescue (Tables I and II), Damage to Vital Points is described below: Aircraft and Aircraft ffafrta CossOr (Canada) Limited - Category B Building and OOntents would be almost completely destroyedi Approximately 25-60$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Shops and equipment would be destroyed by blast and fire. Approximately 80-85$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Shops and equipment would be destroyed by blast and fire. Approximately 80-85$ of the shift on duty would be killed or seriously injured. Electric Power Fuel Power Station, Nova Scotia Light and Power Station Category A Building and equipment would be severely damaged by blast and there is a probability of further damage from fire. Approximately 25-60$ of the shift on duty would be killed or seriously injured. Communications - Telephonic Maritime Telegraph & Telephone Company, Main Exchange Category A Moderate structural damage would be caused by blast and the probability of further damage from fire is high. Approximately 10-15$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation Category A Severe structural damage would be caused by blast and the probability of further damage from fire is high. Approximately 45-65$ of the shift on duty would be killed or seriously injured. 000639 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 21 Port of Halifax (excluding Naval Facilities) Wharves and Piers Damage to the most important wharves and piers would not be serious. Serious damage would be caused, however, to Dartmouth Pier^ the pier of Furness Withy and the Machine Shop Wharf. Transit Sheds Damage to the most important sheds only is described below: Destroyed - sheds # 25 and 28 on Pier A, sheds • # 23 and 24, sheds on Piers 2, 3 and 4, the sheds on Piers 9 and 9A, Dartmouth Pier and Jetty # 6 and the sheds of Furness Withy, Acadia Sugar and Irving Oil would be destroyed by this attack. Serious damage - would be caused to sheds # 20, 21 and 22 on the Seawall, Moderate damage - would be caused to sheds on Pier B, shed # 29, and sheds # 26 and 27 on Pier A. Coal and Oil Bunkering Little or no serious damage would be caused to the major bunkering facilities. Shipbuilding and Repairing The Graving Dock vould not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage No serious blast damage would be caused tb the Grain Elevators but there is a probability of damage from fire. Slight structural blast damage would be caused to the Cold Storage Plant and there is a probability of damage from fire. Shipping (transports, light cruisers and aircraft carriers) Sunk - all ships berthed or anchored between Pier # 4 on the east and the Graving Dock on the west would be sunk or destroyed. Immobilized - all ships berthed or at anchor within the limits of the Furness Withy Jetty on the east and Jetty # 7 on the west would be immobilized. Slight damage - all ships berthed or at anchor west of the Seawall would receive slight damage to super* structure and external equipment. EMC Dockyard All buildings and equipment in the HMC Dockyard area would be totally destroyed by blast and fire. Damage to the Navy jetties would be severe with the exception of jetty # 3. HMCS Stadacona Buildings and equipment in this area would be destroyed by blast and fire. Naval Armament Depot - Dartmouth Buildings and equipment in this area would be destroyed by blast and fire. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 22 Effect of a Burst over Aiming Point # 4 - Chosen to give maximum effect on Commercial Harbour by a 20 kiloton bomb A daytime attack on this Aiming Point would cause casualties among 30-45$ of the population depending on conditions of warning and rescue. A nighttime attack would cause casualties among 25-40$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B This plant would receive no serious damage. Less than 5$ of the shift on duty would be seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Shops and equipment would receive no serious damage. Less than 5$ of the shift on duty would be seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Slight structural damage would be caused by blast but the probability of further damage from fire is low. Less than 5$ of the shift on duty would be seriously injured. Electric Power Fuel Power Station, Nova Scotia Light and Power Station Category A Building and equipment would be completely destroyed by blast and fire and 100$ of the shift on duty vould be killed. Communications - Telephonic Maritime Telegraph & Telephone Company, Main Exchange Category A Building and equipment would be destroyed by blast and fire. Approximately 95-100$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation Category A Serious structural damage would be caused by blast and the probability of fire is high. Approximately 15-25$ of the shift on duty would be killed or seriously injured. 000641 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 23 Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious damage would be caused to the most important wharves and piers by this attack. Transit Sheds Damage to the most important sheds only is described below: Destroyed - all sheds on Pier A, Pier B, sheds # 20, 21 and 22 on the Seawall, sheds # 2 3 , 24 and 29, sheds on Pier 4 and the sheds of Acadia Sugar would be destroyed by this attack. Serious damage - would be caused to the sheds of Furness Withy and the shed on Dartmouth Pier. Moderate damage - would be caused to the sheds on Pier 3. Little or no damage would be caused to the other important transit sheds. Coal and Oil Bunkering Little or no serious damage would be caused to the major bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock, Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage Severe structural damage would be caused to both the National Harbour Board Grain Elevators and Cold Storage Plant facilities by blast and the probability of further severe damage from fire is high. Shipping (transports, light cruisers and aircraft carriers) Sunk - ships berthed at the seawall would be sunk or destroyed. Immobilized - ships berthed or anchored between berth 30 on the east and the Cunard Wharf on the west would be immobilized. Slight damage - ships berthed or anchored within the harbour westward of Pier 2 would receive slight damage to superstructure^and external equipment. HMC Dockyard None of the most important buildings in this area would be damaged structurally by blast and the probability of damage from fire is low. None of the jetties in this area would be damaged. HMOS Stadacona Buildings in this area would not be damaged structurally by blast and the probability of damage from fire is low. Naval Armament Depot - Dartmouth Buildings in this area would not be damaged structurally by blast and the probability of damage from fire is low. 000642 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 24 Effeot of a Burst over Aiming Point # 4 - Chosen to give maximum effect on Commercial Harbour by a 100 kiloton bomb A daytime attack on this Aiming Point would cause casualties among 55-75$ of the population depending on conditions of warning and rescue. A nighttime attack would cause casualties among 50-60$ of the population depending on conditions of warning and rescue (Tables I and II). Damage to Vital Points is described below: Aircraft and Aircraft Parts Cossor (Canada) Limited - Category B Very slight structural damage would be caused by blast but there is a probability of further damage from fire. Approximately 10-20$ of the shift on duty would be killed or seriously injured. Shipbuilding and Repairing Halifax Shipyards Limited (Halifax) - Category A Moderate structural damage would be caused by blast but the probability of further damage from fire is low. Approximately 5$ of the shift on duty would be killed or seriously injured. Halifax Shipyards Limited (Dartmouth) - Category A Serious structural damage would be caused by blast and there is a probability cf further damage to shops and equipment from fire. Approximately 5-10$ of the shift on duty would be killed or seriously injured. Electric Power Fuel Power Station, Nova Scotia Light and Power Station Category A Building and equipment would be completely destroyed and 100$ of the shift on duty would be killed. Communications - Telephonic Maritime Telegraph and Telephone Company, Main ExchangeCategory A Building and contents would be destroyed by blast and fire. Approximately 95-100$ of the shift on duty would be killed or seriously injured. Communications - Transmission and Reception Cable Station, Canadian Overseas Telecommunications Corporation - Category A Building and equipment would be almost completely destroyed by b l a s t and f i r e . Approximately 45-65$ of the s h i f t on duty would be k i l l e d or seriously injured. 000643 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY - 25 Port of Halifax (excluding Naval Facilities) Wharves and Piers No serious damage would be caused to the most important piers by this attack. Transit Sheds Damage to the most important sheds only is described below: Destroyed - all sheds on Pier A, sheds on Pier B, sheds # 23, 24 and 29, sheds # 20, 21 and 22 on the Seawall, sheds on Pier 3 and Pier 4 and the sheds of Furness Withy and Acadia Sugar wouldbe destroyed. Serious damage - would be caused to the sheds on Pier 2, Pier 9 and 9A and Jetty # 6. Moderate damage - would be caused to the sheds of Irving Oil. Coal and Oil Bunkering Little or no serious damage would be caused to the major bunkering facilities. Shipbuilding and Repairing The Graving Dock would not be damaged by this type of attack. No damage would be caused to the floating Dry Dock. Damage to Halifax Shipyards Limited is described above. Grain Elevators and Cold Storage Severe blast damage would be caused to both the National Harbour Board Grain Elevator and Cold Storage Plant facilities and the probability of fire is high. Shipping (transports, light cruisers and aircraft carriers) Sunk - ships berthed or anchored between pier A on the east and the privately owned jetties beyond the Seawall on the west would be sunk or destroyed. Immobilized - ships berthed as far west as the jetty of Furness Withy and anchored within these limits on the Halifax side of the channel would be immobilized. Slight damage - ships berthed or anchored as far west as the jetties of HMC Dockyard would receive slight damage to superstructure and external equipment. HMC Dockyard For the purpose of this attack the buildings in this area have been grouped under the headings of Administration, Stores, and Workshops. Damage to only the most important buildings in each of these categories is described below. The most important Administration Building is the Flag Officer Atlantic Command Headquarters. The most important Stores are Buildings # 40, 40A, 44 and 66 all of which contain vital Naval Stores. Buildings # 17 and 18 - Combined Electric Shops, Building # 19 - the North Machine Shop, Building # 59 - the Shipwright Boat Shop, Building # 105 Border and Plate Shop and Building # 108 - Combined Shop make up the most important Workshops. In general structural blast damage to buildings would range from slight (well constructed multi-storey structures) to severe (single storey shops and sheds etc) and there is a probability that serious fire might occur in this area. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET CANADIAN EYES ONLY « 26 Administration Flag Officer Atlantic Command Headquarters - no structural blast damage would be caused but there is a probability of damage from fire. Stores Slight structural damage would be caused to buildings # 40 and 66 by blast. There is a probability of fire damage in all important stores buildings. Workshops Serious damage would be caused to all major workshops by blast and there is a probability of further damage from fire. Wharves and Piers No serious blast damage would be caused to the Royal Canadian Navy jetties by this attack. HMCS Stadaoona Little or no structural building damage would be caused by blast but the probability of damage from fire is high. Naval Armament Depot - Dartmouth Little or no structural building damage would be caused by blast but there is a probability of damage from fire. (d) Effects on Morale It is expected that the effect on morale in large centres of popvilation in Canada, and at least the northern parts of the United States, would be much the same whichever city is attacked by an atomic bomb. The effect will probably be somewhat proportionate to the size of the casualties inflicted by individual bombs and by the number of cities attacked, VI Air Navigation Aspects of an Attack With the equipment at present available to the Russian Long Range Air Force, Halifax would not be a difficult target to locate on either a high or low level attack under most weather conditions for a well trained navigator not familiar with the area. Accuracy in identifying specific Aiming Points is a more critical aspect. However the Vital Points are spread over the built up area and an atomic explosion over almost any part of the centre of the city would cause serious damage to both Vital Points and Population, though of a lesser magnitude than described by this report. 000645 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET TABLE I - CASUALTY ESTIMATES - CITY OF HALIFAX CANADIAN EYES QNL1 DAYTIME ATTACK 100 Kiloton Bomb 20 Kiloton Bomb Daytime Attack Attack Aiming Point ;f I.- Chosen to Give Maximum Effect on Population During a Daytime Killed Seriously Injured Lightly Injured Killed Seriously Injured Lightly Injured No Warning - NO Rescue 57,800 11,100 5,200 No Warning - No Rescue 81,400 9,800 4,500 No Warning - V/ith Rescue 38,000 19,800 9,800 No Warning - With Rescue 58,700 21,300 8,600 With Warning - With Rescue 30,500 15,700 10,500 With Warning - With Rescue 49,100 16,000 8,700 No Warning - No Rescue 81,100 10,200 4,600 Aiming Point # 2 - Chosen t o Give Maximum Effect on V i t al P o i n t s No Warning - No Rescue 43,900 12,000 7,300 No Warning - With Rescue 33,200 20,000 11,800 No Warning - With Rescue 53,700 22,600 9,000 With Warning - With Rescue 25,800 15,700 11,000 With Warning - With Rescue 46,300 16,200 8,600 ...* 2 000646 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TABLE I - CASUALTY ESTIMATES - CITY OF HALIFAX TOP SECRET CANADIAN EYES ONLY DAYTIME ATTACK 100 Kiloton Boirib 20 K i l o t o n Bomb Aiming P o i n t # 3 - Chos en t o Give Maximum Effect on HMC Dockyard Killed Seriously Injured No Warning - No Rescue 72,300 11,300 11,900 No Warning - With Rescue 45,300 24,000 10,400 With Warning - V/ith Rescue. 35,100 16,800 8,500 Killed Seriously Injured No Warning - No Rescue 40,900 12,100 8,500 No V/arning - With Rescue 21,600 19,600 With Warning - With Rescue 15,800 14,200 Aiming Point # 4 Lightly In.iured lightly Injured 5,700 • 10,400 aitfStallations Chosen t o Give Maximum Effect on Ocean Terminals and In.stallations No Warning - No Rescue 31,900 10,700 No Warning - with Rescue 19,300 15,100 With Warning - With Rescue 15,400 10,100 7,900 10,000 8,000 No Warning - No Rescue 64,300 11,300 6,800 No Warning - With Rescue 38,700 21,300 11,500 With Warning - With Rescue 31,100 13,700 8,400 000647 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TABIE I - CASUALTY ESTIMATES - CITY OF HALIFAX TOP SECRET NIGHTTIME ATTACK 20 Kjloton Bomb CANADIAN EYES ONLY 100 Kiloton Bomb Aiming Point # I-N - Chosen to Give Maximum Effect on Population During a Nighttime Attack Killed Seriously Injured Lightly Injured Killed Seriously Injured Lightly Injured No Warning - No Rescue 57,300 9,700 4,800 No Warning - No Rescue 75,600 7,300 3,200 No Warning - With Rescue 37,200 19,500 9,400 No Warning - With Rescue 57,300 17,600 6,500 With Warning - With Rescue 29,000 15,500 10,600 With Warning - With Rescue 48,700 13,500 7,600 Aiming Point # 2 - Chosen t o Give Maximum Effect on V i t a l Points No Warning - No Rescue 43,500 10,300 6,600 No Warning - No Rescue 69,300 8,800 4,100 No Warning - With Rescue 24,800 17,800 8,300 No Warning - V/ith Rescue 45,800 20,200 8,300 With Warning - With Rescue 18,900 13,300 9,400 With Warning - With Rescue 36,700 14,000 7,500 000648 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET TABLE I - CASUALTY ESTIMATES - CITY CF HALIFAX CANADIAN EYES ONLY NIGHTTIME ATTACK 100 Kiloton Bomb 20 Kiloton Bomb Aiming Point # 5 - Chosen to Give Maximum Effect on HMC Dockyard Killed Seriously Injured Lightly Injured No Warning - No Rescue 37,600 10,600 7,000 No Warning - With Rescue 19,800 17,400 10,200 With Warning - With Rescue 14,500 12,600 9,100 Killed Seriously Injured Lightly Injured No Warning - No Rescue 64,900 9,200 4,600 No Warning - V/ith Rescue 41,000 20,900 9,000 With "Warning - V/ith Rescue 31,900 14,100 7,500 Aiming Point ff 4 - Chosen t o Give Maximum Effeot on Ocean Terminals and I n s t a l l a t i o n s .ax-xons 10,100 5,900 No Warning - No Rescue 24,700 8,600 6,200 No Warning - No Rescue No Warning - V/ith Rescue 13,700 12,100 7,900 No Warning - With Rescue 29,700 19,200 10,100 V/ith Warning - V/ith Rescue 11,000 8,300 6,300 V/ith Warning - With Rescue 23,000 12,200 7,000 43,600 « 000649 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'infornjation TOP SECRET TABIE I I - CASUALTIES PERCENTAGE OF POPULATION X CANADIAN EYES ONLY DAYTIME ATTACK 20 Kiloton Bomb 100 Kiloton Boirib Aiming Point ft I-D - Chosen to Give Maximum Effect on Population During a Daytime Killed Seriously Injured Idgitly Injured Attack Killed Serious l y Injured Lightly Injured No Warning - No Rescue 75 10 5 10 No Warning - With Rescue 55 20 10 10 V/ith Warning - With Rescue 45 15 10 No Warning - No Rescue 75 10 5 No Warning - No Rescue 55 10 5 No Warning - V/ith Rescue 35 20 With Warning - With Rescue 30 15 Aiming Point # 2 - Chosen t o Give Maxim. set on V i t a l Points No Warning - No Rescue 40 10 5 No Warning - V/ith Rescue 30 20 10 No Warning - V/ith Rescue 50 20 10 V/ith Warning - With Rescue 25 15 10 V/ith Warning - With Rescue 45 15 10 .•• . 2 000650 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information TABLE I I - CASUALTIES AS PERCENTAGE OF POPULATION X TOP SECRET DAYTIME ATTACK ^CANADIAN EYES ONLY 20 K i l o t o n Bomb 100 Kiloto n Bomb Aiming P o i n t # 5 - Chosen t o Give Maximum E f f e c t on HMC Dockyard Killed Seriously Injured Lightly Injured Killed Seriously Injured Lightly Injured No Warning - No Rescue 40 10 10 No Warning - No Rescue 65 10 5 No Warning - With Rescue 20 20 10 No Warning - V/ith Rescue 40 20 10 V/ith Warning - V/ith Rescue 05 35 10 V/ith Warning - With Rescue 30 35 10 Aiming P o i nt ft 4 - Chosen t o Give Maximum Effect on Oceans T e r m i n a l s and Installations nstallations No Warning - No Rescue 30 10 5 No Warning - V/ith Rescue 20 35 10 V/ith Warning - V/ith Rescue 35 10 5 x Based on 108,200 w i t h i n 5 m i l e s of an Aiming P o i n t . No Warning - No Rescue 60 10 5 No Warning - V/ith' Rescue 35 20 10 With Warning - With Rescue 30 15 10 The p o p u l a t i o n of t h e m e t r o p o l i t a n a r e a i s 133,900 of t h e c i t y p r o p e r i s 85,600 000651 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TABLE II - CASUALTIES AS PERCENTAGE OF POPULATION TOP SECRET NIGHTTIME ATTACK 20 Kiloton Bomb CANADIAN EYES ONLY 100 Kiloton Bomb Aiming Point #I-N - Chosen to Give Maximum Effect on Population During a Nighttime Attack ghttime Attack Killed Seriously Injured Light l y Injured Killed Seriously Injured Ligitly Injured No Warning - No Rescue 80 10 5 No Warning - No Rescue 60 10 5 No Warning - V/ith Rescue 40 20 10 No Warning - V/ith Rescue 60 20 5 V/ith Warning - V/ith Rescue 30 35 10 V/ith Warning - With Rescues 50 25 10 No Warning - No Rescue 75 10 5 Aiming Point # 2 - Chosen t o Give Maximum Effect on Vital P o i n t s No Warning - No Rescue 45 10 5 No Warning - With Rescue 25 20 10 No Warning - With Rescue 50 20 10 V/ith Warning - With Rescue 20 15 10 V/ith Warning - With Rescue) 40 15 10 a. . . & 000652 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'inforrpation TABIE I I - CASUALTIES AS PERCENTAGE OF POPULATION X TOP tfSECRET CANADIAN EYES ONLY NICHETUSE ATTACK k 100 Kiloton Boirib 20 K i l o t o n Bomb Aiming Point # 5 - Chosen t o Give Maximum E f f e c t on HMC Dockyard Lightly Injured Killed Seriously Injured No Warning - No Rescue 70 10 5 10 No Warning - With Rescue 45 20 10 10 V/ith Warning - V/ith Rescue 35 15 10 Killed Seriously Injured Lightly Injured No Warning - No Rescue 40 10 10 No Warning - With Rescue 20 20 With Warning - V/ith Rescue 15 35 Aiming Point ft 4 - Chosen t o Give Maximum E f f e c t on Ocean T e r m i n a ls and I n s taallllaattiioonnss No Warning - No Rescue 25 10 5 No Warning - With Rescue 35 35 10 V/ith Warning - With Rescue 10 10 5 x Based on 93,100 within 5 miles of an Aiming P o i n t . No Warning - No Rescue 45 10 5 No Warning - V/ith Rescue 30 20 10 With Warning - V/ith Rescue 25 15 10 The population of the metropolitan area i s 133,900 of the c i t y proper i s 85,600 000653 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SECRET TABLE I I I -.SUMMARYCF EFFECT ON VITAL POINTS CANADIAN EYES ONLY Aiming Point ft I-D - Chosen t o Give Maximum Effect on Population During a Daytime Attack by a 20 Kiloton Bomb V i t a l Point V i t a l Point Category Structural Damage b y B l a s t (fo) Probability of Fire Damage t o C o n t e n t s V/ith F i r e No F i r e Halifax Shipyards (Halifax side) A 0 Low 50$ Approx 0-25 Halifax Shipyards (Darmouth side) A 0 - 2 5 Low 50$ Approx 0-25 Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Power Fuel Power Station A 100 High 100 75 - 100 Maritime Telephone & Telegraph Main Exchange A 100 Higb 100 75 - 100 Canadian Overseas Telecommunications Corp A High 100 75 - 100 Cossor (Canada) Ltd B 0 - Low Fairey Aviation Ltd B 0 None 75 - 100 50$ Approx - 0-25 0 000654 �Document disclosed under the Access to Information ActDocument divulgue en vertu de la Loi sur I'acces a /'information TOP SECRET TABLE III - SUMMARY OF EFFECT ON VITAL POINTS CANADIAN EYES ONLY Aiming Point ft I-D - Chosen to Give Maximum Effect on Population During a Daytime Attack by a 100 Kiloton Boirib V i t a l Point V i t a l Point Category Structural Damage b y B l a s t (fo) Probability of Fire Damage t o (3 o n t e n t s V/ith F i r e No F i r e Halifax Shipyards (Halifax side) A 50 - 75 Med 75 - 100 50$ Approx Halifax Shipyards (Darmouth side) A 75$ Approx Med 75 - 100 50 - 75 Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Power Fuel Power Station A 100 High 100 100 Maritime Telephone & Telegraph Main Exchange A 100 High 100 100 Canadian Overseas Telecommunications Corp A 100 High 100 100 B 25 - 50 Med 50-75 B 0 None • Cossor (Canada) Ltd Fairey Aviation Ltd Z.50 0 000655 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information TABIE III - SUMMARY OF EFFECT ON VITAL POINTS TOP SECRET CANADIAN EYES 'ONLY Aiming Point ft I-N - Chosen to Give Maximum Effect on Population During a Nighttime Attack by a 20 Kiloton Bomb Vital Point V i t a l Point Category Structural Damage b y Blast (fo) Probability of Fire Halifax Shipyards (Halifax side) A 75 - 100 Med Halifax Shipyards (Darmouth side) A 0 None Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Power Fuel Power Station A Z.25 Maritime Telephone & Telegraph Main Exchange A Canadian Overseas Telecommunications Corp Damage t o Contents With F i r e 75 - 100 No F i r e 75$ Approx mm 0-25 Med 50 - 75 0-25 0 Med 50 - 75 0-25 A 0 Med -50 - 75 0-25 Cossor (Canada) Ltd B 75 - 100 Hi^x 100 75 - 100 Fairey Aviation Ltd B 0 None - 0 000656 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a rinformation TOP .SECRET TABLE I I I - SUMMARY OF EFFECT ON VITAL POBITS CANADIAN EYES ONLY Aiming Point ft I-N - Chosen to Give Maximum Effect on Population During a Nighttime Attack by a 100 Kiloton Bomb Vital Point Vital Point Category Structural Damage by Blast (fo) Probability of Fire Damage to Contents With Fire No Fire Halifax Shipyards (Halifax side) A 100 High 100 Halifax Shipyards (Darmouth side) A 50 - 75 Med 75 - 100 Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Power Fuel Power Station A 75 - 100 Med 100 Canadian Overseas Telecommunications Corp A 50$ Approx High 75 - 100 50$ Approx Maritime Telephone & Telegraph Main Exchange A 25 - 50 High 75 - 100 50$ Approx Cossor (Canada) Ltd B 100 High 100 Fairey Aviation B 0 None — 75 - 100 50$ Approx 75 - 100 100 0 000657 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TABLE I I I - SUMiARY OF EFFECT ON VITAL POINTS TOP SECRET CANADIAN EYES ONLY Aiming Point ft 2 - Chosen t o Give Maximum Effect on V i t a l Points by a 20 Kiloton Bomb V i t a l Point V i t a l Point Category Structural Damage b y B l a s t (fo) Probability of Fire Damage t o Content s V/ith F i r e No F i r e Halifax Shipyards (Halifax side) A 25-50 Med 75 - 100 25$ Approx Halifax Shipyards (Darmouth side) A 50$ Approx Med 75 - 100 ^50$ Nova Scotia LL^it & Power Fuel Power Station A 75 - 100 Med 100 Maritime Telephone & Telegraph Main Exchange A 50$ Approx Hiijb 75 - 100 Canadian Overseas Telecommunications Corp A 100 High Imperial "Refinery (Imperoyal) A 0 None Cossor (Canada) Ltd B 0 F a i r e y Aviation Ltd B 0 75 - 100 50$ Approx 100 100 Med. 50 - 75 0 None •« 0 000658 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'infof motion TABLE I I I - STM.IARY OF EFFECT ON VITAL POINTS TOP SECRET CANADIAN EYES ONLY Aiming Point ft 2 - Chosen to Give Maximum Effect on Vital Points by a 100 Kiloton Bomb V i t a l Point ital Point Category Structural Damage by Blast (fo) Probability of Fire Damage to Contents With Fire No Fire Halifax Shipyards (Halifax side) A 100 Hi^i 100 75 - 100 Halifax Shipyards (Darmouth side) A 100 Hi^i 100 75 - 100 Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Power Fuel Power Station A 100 Higi 100 100 Maritime Telephone & Telegraph Main Exchange A 100 Hi^i 100 75 - 100 Canadian Overseas Telecommunications Corp A 100 High 100 100 Cossor (Canada) Ltd B Med 75 - 100 Fairey Aviation Ltd B None «. 25$ Approx 0 25$ Approx 0 000659 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'infofmation TABLE I I I - SUMMARY CF EFFECT ON VITAL POINTS TOP SECRET CANADIAN EYES ONLY Aiming Poin t ft 3 - Chosen t o Give Maximum E f f e c t t o HMC Dockyard by a 20 K i l o t o n Bomb Vital Point V i t a l P o i nt Category Structural Damage b y B l a s t (fo) Damage t o Contents Probability of Fire With F i r e H a l i f a x Shipyards (Halifax s i d e ) A 100 High 100 H a l i f a x S h i p y a r d s (Darmouth s i d e ) A 50 - 75 Med 75$ Approx I m p e r i a l Refinery A 0 None Nova S c o t i a Light & Power F u e l Power S t a t i o n A Z. 25 Med Maritime Telephone & T e l e g r a ph Main Exchange A 0 Canadian Overseas Telecommunications Corp A .£.25 Cossor (Canada) Ltd B Z.25 F a i r e y A v i a t i o n Ltd B (Imperoyal) 0 No Fire 75 - 100 50$ Approx 50 - 75 0-25 50 - 75 0-25 High 50 - 75 £25 Med 50 - 75 £25 w» 0 None 000660 �Document disclosed under the Access to Information Act Documentdivulgue en vertu de la Loi sur I'acces a I'infqffnqtion TOP SECRET TABLE I I I - SUM.IAHY OF EFFECT ON VITAL POINTS CANADIAN EYES ONLY Aiming Point ft 3 - Chosen t o Give Maximum Effect t o HMC Dockyard b y a 100 Kiloton Bomb V i t a l Point V i t a l Point Category Structural Damage by Blast (fo) Probability of Fire Damage t o Contents With F i r e No F i r e H a l i f a x S h i p y a r d s (Halifax s i d e ) A 100 High 100 75$ Approx H a l i f a x S h i p y a r d s (Darmouth s i d e ) A 100 High 100 75$ Approx Imperial Refinery A 0 None 75 - 100 (Imperoyal) A 75 - 100 Med 100 Maritime Telephone & Telegraph Main Exchange A 25 - 50 High 75 - 100 50$ Approx Canadian Overseas Telecommunications Corp A 75$ Approx High 75 - 100 75$ Approx Cossor (Canada) Ltd B 75 - 100 High F a i r e y A v i a t i o n Ltd B Nova S c o t i a Light & Power F u e l Power S t a t i o n 0 None 100 75 - 100 0 000661 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'infqffnation TABLE III - SUMMARY OF EFFECT ON VITAL POINTS TOP SECRET CANADIAN EYES ONLY Aiming Point ft ^4-;' - Chosen to Give Maximum Effect t o Ocean Terminals and I n s t a l l a t i o n s by a 20 Kiloton Bomb V i t a l Point i t a l Point Category Structural Damage b y B l a s t ($) Probability of Fire Damage t o Content s V/ith F i r e - No F i r e Halifax Shipyards (Halifax side) A 0 None Halifax Shipyards (Darmouth side) A 0-25 Low Imperial Refinery (Imperoyal) A 0 None Nova Scotia Light & Pov/er Fuel Power Station A 100 High 100 . 100 Maritime Telephone & Telegraph Main Exchange A High 100 75 - 100 Canadian Overseas Telecommunications Corp 75 - 100 50$ Approx 0 0-25 A £50 High 75 - 100 Cossor (Canada) Ltd B 0 None 0 0 Fairey Aviation Ltd B 0 None „, 0 50$ Approx 000662 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'infqffnation TOP SECRET TABLE I I I - SUMMARY OF EFFECT ON VITAL POIMTS CANADIAN EYES ONLY Aiming Point ft ^'•C - Chosen to Give Maximum Effect t o the Port by a 100 Kiloton Bomb Vital Point V i t a l Point Category Structural Damage b y B l a s t ($) Probability of Fire Damage to Contents With F i r e No F i r e Halifax Shipyards (Halifax side) A 25 - 50 Low 50 - 75 £50 Halifax Shipyards (Darmouth side) A 75$ Approx Med 75 - 100 £75 Imperial Refinery (Imperoyal) A Nova Scotia Light & Power Fuel Power Station A 100 High 100 100 Maritime Telephone & Telegraph Main Exchange A 100 High 100 100 Canadian Overseas Telecommunications Corp A 75 - 100 High 100 75 - 100 Cossor (Canada) Ltd B 0-25 Med Fairey Aviation Ltd B 0 None 50$ Approx «* 0-25 0 000663 �4 " Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information - - ,„ TOP SECRET CANADIAN EYES ONLY APPENDIX "A" - STUDY OF CITY OF HALIFAX For the City of Halifax the list of Vital Points as determined by the Interdepartmental Committee on Vital Points is as follows: Category "A" Halifax Shipyards Limited Imperial Refinery (Imperoyal) McColl Frontenac, 1536 Barrington Street Nova Scotia Light and Power Company Fuel Power Station Maritime Telephone and Telegraph main Halifax Exchanges Canadian Overseas Telecommunications Corporation, Barrington Street Naval Dockyard Category "Bn Cossor (Canada) Limited Fairey Aviation Company The categories determined by the Interdepartmental Committee on Vital Points are designed for sabotage studies. They have been adapted for the present study by raising those points which are important to the joint Canadian U.S. war effort from Category "A" to a superior Category "AA", and by restating the significance of the categories. The categories used are as follows: Category "AA" Individual plants or buildings of sufficient importance to the North American war effort to be considered possible atomic bomb targets, irrespective of any effects of an A-bomb attack on the target on other vital points. Additional effects will, however, play a part in determining the relative importance of Category "AA" targets and they have, therefore, been studied and reported. Category "A" Individual plants or buildings not of sufficient importance to the North American war effort to be considered A-bomb targets by themselves, but which may become A-bomb targets if the other effects of the explosion of a bomb over the target would produce a sufficient cumulative effect on population and other vital points. �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information TOP SLCRLT L-xiNAblAN x-YLS ONLY - 2 - Category "B" Important points to be considered in conjunction with attacks on Category "AA" and Category "A" targets. Category "C" Minor points to be considered in conjunction with attacks on Category "AA" and Category "A" targets. 000665 � Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context CDIM02659 Title A name given to the resource Report, "Atomic Vulnerability Study of Canada, City of Halifax" Date A point or period of time associated with an event in the lifecycle of the resource 8/18/1953 Source A related resource from which the described resource is derived Nuclear Vulnerability Study, RG25, Vol. 4563, File 50041-A-40, Part 2, LAC. Creator An entity primarily responsible for making the resource Department of External Affairs Rights Information about rights held in and over the resource Canadian Crown Subject The topic of the resource Early Cold War, Atomic Vulnerability Description An account of the resource Atomic Vulnerability Study Panel, Ottawa Publisher An entity responsible for making the resource available Canada Declassified Type The nature or genre of the resource Text Format The file format, physical medium, or dimensions of the resource PDF Language A language of the resource en