ONTARIO PROVINCIAL STANDARD SPECIFICATION METRIC OPSS.PROV 185 NOVEMBER 2012 GENERAL SPECIFICATION FOR TEMPORARY FLOW CONTROL FOR CONSTRUCTION IN WATERBODIES TABLE OF CONTENTS 185.01 SCOPE 185.02 REFERENCES 185.03 DEFINITIONS 185.04 DESIGN AND SUBMISSION REQUIREMENTS 185.05 MATERIALS 185.06 EQUIPMENT - Not Used 185.07 CONSTRUCTION 185.08 QUALITY ASSURANCE - Not Used 185.09 MEASUREMENT FOR PAYMENT - Not Used 185.10 BASIS OF PAYMENT APPENDICES 185-A Commentary 185.01 SCOPE This specification covers the requirements for the design, installation, operation, maintenance and removal of temporary flow control in waterbodies during construction. 185.01.01 Specification Significance and Use This specification is written as a provincial-oriented specification. Provincial-oriented specifications are developed to reflect the administration, testing, and payment policies, procedures, and practices of the Ontario Ministry of Transportation. Use of this specification or any other specification shall be according to the Contract Documents. Page 1 Rev. Date: 11/2012 OPSS.PROV 185
185.01.02 Appendices Significance and Use Appendices are not for use in provincial contracts as they are developed for municipal use, and then, only when invoked by the Owner. Appendices are developed for the Owner s use only. Inclusion of an appendix as part of the Contract Documents is solely at the discretion of the Owner. Appendices are not a mandatory part of this specification and only become part of the Contract Documents as the Owner invokes them. Invoking a particular appendix does not obligate an Owner to use all available appendices. Only invoked appendices form part of the Contract Documents. The decision to use any appendix is determined by an Owner after considering their contract requirements and their administrative, payment, and testing procedures, policies, and practices. Depending on these considerations, an Owner may not wish to invoke some or any of the available appendices. 185.02 REFERENCES When the Contract Documents indicate that provincial-oriented specifications are to be used and there is a provincial-oriented specification of the same number as those listed below, references within this specification to an OPSS shall be deemed to mean OPSS.PROV, unless use of a municipal-oriented specification is specified in the Contract Documents. When there is not a corresponding provincialoriented specification, the references below shall be considered to be to the OPSS listed, unless use of a municipal-oriented specification is specified in the Contract Documents. This specification refers to the following standards, specifications, or publications: Ontario Provincial Standard Specifications, Construction OPSS 518 OPSS 801 OPSS 804 OPSS 805 Control of Water from Dewatering Operations Tree Protection Seed and Cover Temporary Erosion and Sediment Control Measures Canadian and Provincial Statutes Ontario Water Resources Act, R.S.O.1990, c. 0.40 Ontario Water Resources Act, R.S.O.1990, c. 0.40 - Ontario Regulation 387/04 - Water Taking 185.03 DEFINITIONS For the purpose of this specification, the following definitions apply: Deleterious Substance means as defined in Fisheries Act. Low Flow Event Return Period means a flow event that has a probability of occurrence equal to or less than once every 2 years. Original Waterbody Channel means the channel in which a waterbody was flowing prior to the commencement of the work. Page 2 Rev. Date: 11/2012 OPSS.PROV 185
Plug means an impervious, natural, or constructed drainage work that blocks water. Temporary Flow Control means a temporary flow control device in conjunction with a temporary water conveyance device that is used to isolate a Working Area from a waterbody. Temporary Flow Control Device means a material or a group of materials that are used to control water flow into and out of a water conveyance device and can include a plug. Temporary Waterbody Channel means the channel in which a waterbody is flowing at the completion of any temporary waterbody relocation sequence. Temporary Water Conveyance Device means a device that is used to move water downstream, around or through a Working Area in a waterbody from a temporary flow control device and can include a temporary waterbody channel, a fill and culvert, or a pumping and piping system. Waterbody means any permanent or intermittent, natural or constructed body of water including lakes, ponds, wetlands and watercourses, but does not include sewage works as defined in the Ontario Water Resources Act. Watercourse means a stream, creek, river, or channel including ditches, in which the flow of water is permanent, intermittent, or temporary. 185.04 DESIGN AND SUBMISSION REQUIREMENTS 185.04.01 Design Requirements Temporary flow control design shall be provided for Work to be undertaken in a waterbody, unless otherwise specified in the Contract Documents. As a minimum, the temporary flow control shall be designed for the low flow event return period of the waterbody. The elevation of the highest point of any temporary flow control device shall be a minimum of 0.30 m higher than the surface water elevations for the low flow event return period of the waterbody. 185.04.02 Submission Requirements 185.04.02.01 Working Drawings Three sets of Working Drawings shall be submitted for information purposes only to the Contract Administrator for the work at each location, at least 2 Days prior to the commencement of the temporary flow control installation. Prior to making a submission, the seals and signatures of a design Engineer and a design-checking Engineer shall be affixed on the Working Drawings verifying that the drawings are consistent with the Contract Documents. The following information shall be shown on the Working Drawings: a) Plans, Elevations, and Details. i. Location and extent of the temporary flow control. ii. Location and elevation of all elements that form the temporary flow control. b) The design flow return period on which the design in based. c) The number, type, and capacity of any pumps used in the temporary flow control. Page 3 Rev. Date: 11/2012 OPSS.PROV 185
d) Written procedures that fully describe the sequence and timing of the work, the associated waterbody and fish habitat protection measures, and the related contingency measures associated with each stage of the temporary flow control. 185.07 CONSTRUCTION 185.07.01 General Requirements Continuous temporary flow control shall be provided to the keep the Working Area stable and well drained for the duration of construction in a waterbody. 185.07.02 Operational Constraints Work shall be undertaken according to the timing constraints specified elsewhere in the Contract Documents. 185.07.03 Permit to Take Water For any Work that includes temporary flow control requiring the taking of water, a permit to take water, under the appropriate category specified in Ontario Regulation 387/04 made under the Ontario Water Resources Act shall be obtained from the Ontario Ministry of the Environment, unless specified elsewhere in the Contract Documents, prior to the installation of the temporary flow control. 185.07.04 Protection of Trees Protection of trees not designated for removal shall be according to OPSS 801. 185.07.05 Temporary Erosion and Sediment Control Measures The installation, maintenance, and removal of temporary erosion and sediment control measures shall be according to OPSS 805. 185.07.06 Sediment Traps Sediment traps shall be designed, constructed, and maintained according to OPSS 805. 185.07.07 Protection in Waterbodies and on Waterbody Banks Protection in waterbodies and on waterbody banks shall be according to the Contract Documents. 185.07.08 Control of Water from Dewatering Operations The control of water from dewatering operations shall be according to OPSS 518. 185.07.09 Seed and Cover Seed and cover shall be according to OPSS 804. 185.07.10 Installation 185.07.10.01 Installation of a Temporary Flow Control Outside of a Waterbody As a minimum, temporary flow control outside of a waterbody shall be deployed according to the following Page 4 Rev. Date: 11/2012 OPSS.PROV 185
a) The temporary flow control shall be constructed or installed according to the design submitted to the Contract Administrator. Upstream and downstream plugs separating the original waterbody channel and the temporary water conveyance device shall remain in place. b) The downstream plug shall be opened to allow water into the temporary water conveyance device and water pressure shall be allowed to equalize between the original waterbody channel and the temporary water conveyance device. c) The upstream plug shall be opened to allow water to flow through both the original waterbody channel and the temporary water conveyance device. d) A plug shall be installed in the original waterbody channel, at the inflow confluence of the original waterbody channel and the temporary water conveyance device, to fully divert the water to flow through the temporary water conveyance device. e) A plug shall be installed in the original waterbody channel, at the outflow confluence of the temporary water conveyance device and the original waterbody channel, to prevent backflow into the original waterbody channel. f) The original waterbody channel isolated by the temporary waterbody channel shall be dewatered and any stranded fish shall be rescued as required. g) If cover material is specified in the design, it shall be applied immediately after exposure of soils. 185.07.10.02 Installation of a Temporary Flow Control Within a Waterbody At a minimum, temporary flow control within a waterbody shall be deployed according to the following a) The temporary flow control shall be constructed or installed according to the design submitted to the Contract Administrator. An upstream temporary flow control device shall be installed to divert water flow into the temporary flow control according to the design. b) A plug shall be installed in the original waterbody channel, at the inflow confluence of the original waterbody channel and the temporary water conveyance device, to fully divert the water to flow through the temporary water conveyance device. c) A plug shall be installed in the original waterbody channel, at the outflow confluence of the temporary water conveyance device and the original waterbody channel, to prevent backflow into the original waterbody channel. d) The original waterbody channel, isolated by the temporary waterbody channel, shall be dewatered and any stranded fish shall be rescued as required. e) If cover material is specified in the design, it shall be applied immediately after exposure of soils. 185.07.11 Removal 185.07.11.01 Removal of a Temporary Flow Control Outside of a Waterbody As a minimum, temporary flow control outside of a waterbody shall be removed according to the following a) All Work in the Working Area shall be completed and the temporary flow control, isolated by the temporary waterbody channel, shall be stabilized according to the Contractor s design prior to returning the flow of water to the original waterbody channel. Page 5 Rev. Date: 11/2012 OPSS.PROV 185
b) The downstream plug in the original waterbody channel shall be opened to allow water into the original waterbody channel and water pressure shall be allowed to equalize between the original waterbody channel and the temporary flow control. c) The upstream plug in the original waterbody channel shall be opened to allow water to flow through both the original waterbody channel and the temporary flow control. d) A plug shall be installed in the temporary flow control, at the inflow confluence of the original waterbody channel and the temporary flow control, to fully divert the water to flow through the original waterbody channel. e) A plug shall be installed in the temporary flow control, at the outflow confluence of the temporary flow control and the original waterbody channel, to prevent backflow into the temporary flow control. f) The isolated temporary flow control shall be dewatered. 185.07.11.02 Removal of a Temporary Flow Control Within a Waterbody As a minimum, temporary flow control within a waterbody shall be removed according to the following a) All Work in the Working Area shall be completed and the original waterbody channel, isolated by the temporary flow control, shall be stabilized in accordance with the Contractor s design prior to returning the flow of water to the original waterbody channel. b) The downstream plug shall be removed. c) The upstream plug shall be removed. d) The temporary flow control shall be removed. 185.07.12 Management of Excess Material Management of excess material shall be according to the Contract Documents. 185.10 BASIS OF PAYMENT Payment at the Contract price for the appropriate tender items that require temporary flow control shall include full compensation for all labour, Equipment, and Material to do the work. When the Contract contains separate items for work required by this specification, payment shall be at the Contract prices and according to the specifications for such work. Page 6 Rev. Date: 11/2012 OPSS.PROV 185
Appendix 185-A, November 2012 FOR USE WHILE DESIGNING MUNICIPAL CONTRACTS Note: This is a non-mandatory Commentary Appendix intended to provide information to a designer, during the design stage of a contract, on the use of the OPS specification in a municipal contract. This appendix does not form part of the standard specification. Actions and considerations discussed in this appendix are for information purposes only and do not supersede an Owner s design decisions and methodology. Designer Action/Considerations No information provided here. Related Ontario Provincial Standard Drawings No information provided here. Page 7 Rev. Date: 11/2012 OPSS.PROV 185