S-3.1.01, r. 1 - Dam Safety Regulation

Section 58 Disposition versions

2023-07-06

58. In addition to the plans and specifications and the certificate required under section 6 of the Act, the following information and documents adapted and prepared specifically in relation to the proposed alteration must be submitted with an application for authorization for a structural alteration to a dam whose failure consequence category is equal to or greater than “moderate” or of an associated dam, other than one referred to in section 57:

(1)  the structural and foundation stability studies for the dam, including the calculations on which they are based, carried out in accordance with good practice and the minimum safety standards applicable, and assessing possible failure modes;

(2)  the opinion of the engineer in charge concerning the liquefaction potential of the dam and its foundation and the data on which that opinion is based, unless the dam failure consequence category is “very low” or “low”;

(3)  the geotechnical studies required to support the studies and opinion referred to in subparagraphs 1 and 2 of this paragraph, unless the dam failure consequence category is “very low” or “low”;

(4)  confirmation that emergency preparedness procedures are provided for in the event of the failure of the dam or of other temporary structures during the construction work referred to in the application, if an emergency action plan is required under Subdivision 2 of Division III for the dam;

(5)  if the proposed structural alteration would enlarge the area affected by a dam failure, the recommendation of the engineer responsible for drawing up the plans and specifications for the proposed alteration in respect of the dam failure consequence category, to which is appended the dam failure analysis, rough mapping or characterization required under section 18 for the consequence category the engineer considers appropriate for the dam;

(6)  detailed cost estimates for the planned work;

(7)  a recommendation from the engineer in charge concerning the classification of the dam following the work;

(8)  a notice stating that the emergency action plan has been reviewed and indicating the authority to which the plan or a summary of the plan has been sent in accordance with section 39, if such a plan must be drawn up for the dam and if the completion of the project covered by the application for authorization will enlarge the area affected by a dam failure.

In addition to the information and documents referred to in the first paragraph, if the structural alteration would change the safety check flood, the impounding capacity, the full supply level or the discharge capacity of the dam, the following documents must also be appended to the application for authorization:

(1)  the appropriate hydrologic and hydraulic studies;

(2)  the results of a topographic analysis of the reservoir rim;

(3)  if applicable, the recommendations of the engineer in charge as to the need for an intervention at the locations, on the reservoir rim, through which overflow could occur during a flood equal to the dam’s safety check flood;

(4)  a notice from the owner or the engineer in charge stating that an impounded water management plan has been drawn up or reviewed and indicating the authority to which the plan or a summary of the plan has been sent in accordance with section 33 if, pursuant to Subdivision 1 of Division III, such a plan must be drawn up for the dam.

O.C. 300-2002, s. 58; O.C. 17-2005, s. 11; O.C. 402-2011, s. 9; O.C. 901-2014, ss. 19 and 22; O.C. 989-2023, s. 42.

2014-11-13

58. In addition to the information and documents required by the Act, the following information and documents adapted and prepared specifically in relation to the proposed alteration must be submitted with an application for authorization for the structural alteration of a dam that is not an alteration under section 57:

(1)  the structural and foundation stability studies for the dam, including geotechnical investigations;

(2)  seismic stability calculations for the dam, unless the dam failure consequence category is “very low” or “low”;

(3)  the opinion of the engineer in charge on the liquefaction potential of the dam and its foundation and the data on which that opinion is based, unless the dam failure consequence category is “very low” or “low”;

(4)  a description of emergency preparedness procedures in the event of a dam failure or failure of the temporary structures during the structural alteration work for which the authorization is sought, if an emergency action plan is required for the dam under Subdivision 2 of Division III;

(5)  if the proposed structural alteration would enlarge the area that would be affected by a dam failure, the recommendation of the engineer in charge of drawing up the plans and specifications for the proposed alteration in respect of the dam failure consequence category, to which is appended the dam failure analysis, rough maps or characterization required under section 18 for the consequence category the engineer considers appropriate for the dam; and

(6)  detailed cost estimates of the planned work.

In addition to the information and documents referred to in the first paragraph, if the structural alteration would change the safety check flood, the impounding capacity, the full supply level or the discharge capacity of the dam, the following documents must also be appended to the application for authorization:

(1)  the appropriate hydrologic and hydraulic studies;

(2)  the results of a topographic analysis of the reservoir rim;

(3)  if applicable, the recommendations of the engineer in charge as to the need for an intervention at the locations, on the reservoir rim, through which overflow could occur during a flood equal to the dam’s safety check flood;

(4)  the impounded water management plan summary, as revised at the time of the application for authorization if such a plan is required for the dam under subdivision 1 of Division III.

A $200 deposit on the fees prescribed in section 64 must accompany the application for authorization. The deposit is not refundable under any circumstances.

O.C. 300-2002, s. 58; O.C. 17-2005, s. 11; O.C. 402-2011, s. 9; O.C. 901-2014, ss. 19 and 22.

2012-09-01

58. In addition to the information and documents required by the Act, the following information and documents adapted and prepared specifically in relation to the proposed alteration must be submitted with an application for authorization for the structural alteration of a dam that is not an alteration under section 57:

(1)  the structural and foundation stability studies for the modified dam, including geotechnical investigations;

(2)  seismic stability calculations for the modified dam, unless the dam failure consequence category under sections 17 and 18 is Very Low or Low, but in the latter event, only if the dam is situated in seismic zone 1, 2 or 3;

(3)  a topographic analysis of the reservoir rim with respect to the safety check flood, if applicable;

(4)  a description of emergency preparedness procedures in the event of a dam failure or failure of the temporary structures during the structural alteration work for which the authorization is sought, if an emergency action plan is required for the dam under Subdivision 2 of Division III;

(5)  if the proposed structural alteration would enlarge the area that would be affected by a dam failure, the recommendation of the engineer in charge of drawing up the plans and specifications for the proposed alteration in respect of the dam failure consequence category under sections 17 and 18, to which is appended the dam failure analysis, rough maps or characterization required under section 18 for the consequence category the engineer considers appropriate for the dam; and

(6)  detailed cost estimates of the planned work.

In addition to the information and documents referred to in the first paragraph, if the structural alteration would change the safety check flood, the impounding capacity, the full supply level or the discharge capacity of the dam, the following documents must also be appended to the application for authorization:

(1)  the appropriate hydrologic and hydraulic studies; and

(2)  the impounded water management plan summary as revised for the purpose of the application for authorization if such a plan is required for the dam under Subdivision 1 of Division III.

A $200 deposit on the fees prescribed in section 64 must accompany the application for authorization. The deposit is not refundable under any circumstances.

O.C. 300-2002, s. 58; O.C. 17-2005, s. 11; O.C. 402-2011, s. 9.