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HomeMy WebLinkAboutFlood Control & Water Conservation Advisory Board 1970The Metropolitan Toronto and Region Conservation Authority MUflTIES C -1 Flood Control & Water Conservation Adv.Bd. Wed - April -1 -1970 #1/70 The Flood Control and Water Conservation Advisory Board met at The Metropolitan Toronto Board of Trade Golf & Country Club, Woodbridge, on Wednesday, April 1, 1970, commencing at 10:00 a.m. PRESENT WERE ABSENT Chairman Vice - Chairman Members Chairman of the Authority Secretary - Treasurer Director of Operations Adm. - FC &WC Division Adm. - Property Division Adm. - CLM Division R.G. Henderson A. O'Donohue C.A. Balsdon R,I. Hewitt E.A. Horton Mrs. N. Horwood C.F. Kline J.G. Mottershead K.G. Waters Dr. G. Ross Lord F.L. Lunn K.G. Higgs E.F. Sutter W.E. Jones W.A. McLean Member F.J. McKechnie MINUTES The Minutes of Meeting #1/69 were presented. Res. #1 Moved by: Dr. G. Ross Lord Seconded by: K.G. Waters RESOLVED THAT: The Minutes of Meeting #1/69, as presented, be adopted. CARRIED UNANIMOUSLY; PROJECT W.C.63 - "A PROJECT FOR THE EXTENSION OF THE PLAN FOR FLOOD CONTROL & WATER CONSERVATION" Project W.C.63 - "A Project for the Extension of the Plan for Flood Control & Water Conservation" was presented and discussed in great detail. Res. #2 Moved by: Mrs. N. Horwood Seconded by: C.F. Kline RESOLVED THAT: The draft Brief for Project W.C.63 - "A Project for the Extension of the Plan for Flood Control & Water Conservation ", be amended to include the construction of the Snelgrove Reservoir within the five -year period and that the levy for the years 1972 to 1975 be amended to read, in total, $1,150,000.00. CARRIED UNANIMOUSLY; Res. #3 Moved by: K.G. Waters Seconded by: C.A. Balsdon RESOLVED THAT: The Brief for Project W.C.63 - "A Project for the Extension of the Plan for Flood Control & Water Conservation ", be received, as amended; and further C -2 -2- THE BOARD RECOMMENDS THAT: Project W.C.63 - "A Project for the Extension of the Plan for Flood Control and Water Conservation ", be adopted; and further in this connection THAT the following action be taken: (a) The Brief be printed in suitable form and that a Sub- Committee, composed of the Chairman of the Authority, the Chairman of the Flood Control and Water Conservation Advisory Board, and a representative of the municipality concerned, present the Project to all participating municipalities; (b) All municipalities be declared as benefiting, on the basis set forth in the Project, and that when approved by All municipalities, the Project be submitted to the Minister of Energy and Resources Management for approval and for grants on the basis as set forth in the Project; and (c) The Project be submitted to The Ontario Municipal Board for their approval and necessary action. CARRIED UNANIMOUSLY; ADJOURNMENT On Motion, the Meeting adjourned at 12:30 p.m., April 1. R.G. Henderson F.L. Lunn Chairman Secretary- Treasurer The Metropolitan Toronto and Region Conservation ionn Authority M U T E S C -3 Flood Control & Water Conservation Adv.Bd. Wed - April -15 -1970 #2/70 The Flood Control and Water Conservation Advisory Board met at the Authority Office, #7 Highway on Wednesday, April 15, 1970, commencing at 2:00 p.m. PRESENT WERE Chairman Members Authority Member Chairman of the Authority Secretary - Treasurer Adm. - FC&WC Division Adm. - Property Division James F. MacLaren Limited ABSENT Vice - Chairman MINUTES R.G. Henderson C.A. Balsdon R.I. Hewitt E.A. Horton Mrs. N. Horwood C.F. Kline F.J. McKechnie J.G. Mottershead K.G. Waters V. Yerex Dr. G. Ross Lord F.L. Lunn E.F. Sutter W.E. Jones D. Sexsmith & Associates A. O'Donohue The Minutes of Meeting #1/70 were presented. Moved by: K.G. Waters Res. #4 Seconded by: R.I. Hewitt RESOLVED THAT: The Minutes of Meeting #1/70, as presented, be adopted. CARRIED UNANIMOUSLY; STAFF PROGRESS REPORT Mr. Sutter presented the Staff Progress Report for the period January 1 to April 15, 1970. Res. #5 Moved by: Mrs. N. Horwood Seconded by: R.I. Hewitt RESOLVED THAT: The Staff Progress Report for the period January 1 to April 15, 1970, be received and filed. CARRIED UNANIMOUSLY; REPORT ON EROSION CONTROL & RIVER BANK STABILIZATION A Staff communication was presented regarding a Report on Erosion Control and River Bank Stabilization and the report was presented by Mr. D. Sexsmith of the firm James F. MacLaren Limited; Consulting Engineers. The report was discussed in considerable detail. Res. #6 Moved by: C.F. Kline Seconded by: R.I. Hewitt C -4 -2- RESOLVED THAT: The Staff communication and the Report on Erosion Control and River Bank Stabilization as prepared by James F. MacLaren Limited, Consulting Engineers, dated March 1970, be received; and further THE BOARD RECOMMENDS THAT: The following action be taken with regard to the Report on Erosion Control and River Bank Stabilization: (a) Copies of this report be submitted to the Conservation Authorities Branch, Department of Energy and Resources Management. (b) Copies of this report be submitted to appropriate Municipal officials for their review and comment. (c) That this report be referred to the Technical Advisory Committee on Parks and Conservation for review and recommen- dations. (d) That the Authority sponsor a special meeting of concerned Municipal officials to review the report and work out procedures for mutual use of the data contained therein. (e) That, in undertaking any new projects for erosion control and bank stabilization, the Authority give consideration to the priorities contained within the MacLaren report. (f) That the Staff be directed to prepare a report regarding our regulatory controls, specifically pointing out any inadequacies or deficiencies and recommending such amendments as may be necessary to improve their effectiveness. (g) That the Staff immediately prepare a set of procedures for updating of the data contained in the MacLaren report. CARRIED UNANIMOUSLY; PROJECT W.C. 57 - "A PROJECT FOR CHANNEL IMPROVEMENTS ON THE MIMICO CREEK - VILLAGE OF MALTON Project W.C. 57 - "A Project. for Channel Improvements on the Mimico Creek - Village of Malton" was presented and discussed in detail. Res. #7 Moved by: F.J. McKechnie Seconded by: Mrs. N. Hopwood RESOLVED THAT: The brief of Project W.C. 57 - "A Project for Channel Improvements on the Mimico Creek - Village of Malton" be received and appended as Schedule "A" of these Minutes; and further THE BOARD RECOMMENDS THAT: Project W.C. 57 - "A Project for Channel Improvements on the Mimico Creek - Village of Malton" be adopted; and further in this connection THAT the following action be taken: (i) The Town of Mississauga and the Township of Chinguacousy be designated as benefiting municipalities and be levied the Authority's share of the cost as set forth in the Project; (ii) The Minister of the Department of Energy & Resources Management be requested to approve of the Project and a grant of 50% of the cost thereof; (iii) When approved by the benefiting municipalities and the Minister of the Department of Energy & Resources Management, the appropriate Authority officials be authorized to take whatever action is required in connection with the Project including the execution of any necessary documents. CARRIED UNANIMOUSLY; -3- C -5 PROJECT W.C. 5$ - "A PROJECT FOR EROSION CONTROL AND CHANNEL IMPROVEMENTS ON THE WEST BRANCH OF THE DON RIVER BETWEEN BATHURST STREET AND FINCH AVENUE Project W.C. 5$ - "A Project for Erosion Control and Channel Improvements on the West Branch of the Don River between Bathurst Street and Finch Avenue" was presented and considered in detail. Res. #$ Moved by: C.F. Kline Seconded by: R.I. Hewitt RESOLVED THAT: The brief of Project W.C. 5$ - "A Project for Erosion Control and Channel Improvements on the West Branch of the Don River between Bathurst Street and Finch Avenue be received and appended as Schedule "B" of these Minutes; and further THE BOARD RECOMMENDS THAT: Project W.C. 5$ - "A Project for Erosion Control and Channel Improvements on the West Branch of the Don River between Bathurst Street and Finch Avenue ", be adopted and further in this connection THAT the following action be taken: (i) The Municipality of Metropolitan Toronto be designated as benefiting municipality as agreed by the said municipality; (ii) The Minister of the Department of Energy & Resources Management be requested to approve of this Project and a grant of 50% of the cost thereof; (iii) When approved, the appropriate Authority officials be authorized to take whatever action is required in connection with the Project including the execution of any necessary documents. CARRIED UNANIMOUSLY; PROJECT W.C. 64 - "A PROJECT FOR EROSION CONTROL AND BANK STABILIZATION ADJACENT TO MARKHAM DISTRICT HIGH SCHOOL - TOWN OF MARKHAM Project W.C. (;4 - "A Project for Erosion Control and Bank Stabilization adjacent to Markham District High School - Town of Markham" was presented and considered in detail. Res. #9 Moved by: C.A. Balsdon Seconded by: K.G. Waters RESOLVED THAT: The brief of Project W.C. 61.E - "A Project for Erosion Control and Bank Stabilization adjacent to Markham District High School - Town of Markham ", be received and appended as Schedule "C" of these Minutes; and further THE BOARD RECOMMENDS THAT: Project W.C. 64 - "A Project for Erosion Control and Bank Stabilization adjacent to Markham District High School - Town of Markham" be adopted; and further in this connection THAT the following action be taken: (i) The Town of Markham be designated as benefiting municipality; (ii) The Minister of the Department of Energy & Resources Management be requested to approve of the Project and a grant of 50% of the cost thereof; C -6 -4- (iii) When approved by the benefiting municipality and the Minister of the Department of Energy & Resources Management, the appropriate Authority officials be authorized to take whatever action is required in connection with the Project including the execution of any necessary documents. CARRIED UNANIMOUSLY; ADJOURNMENT On Motion, the Meeting adjourned at 1.:00 p.m., April 15. R. G. Henderson F. L. Lunn Chairman Secretary - Treasurer SCHEDULE *AI C -7 METROPOLITAN TORONTO AND REGION CONSERVATION AUTHORITY PROJECT W.C. -57 ^A PROJECT FOR CHANNEL IMPROVEMENTS ON THE MIMICO CREEK IN THE VILLAGE OF MALTON" Submitted for Approval to the Honourable Minister of Energy and Resources Management May, 1970 C -$ CONTENTS OF BRIEF I. DETAILS OF PROJECT (a) Location and description (including maps and pictures (b) Purpose of project (c) Costs (d) Financing II. AUTHORITY APPROVAL AND REQUESTS (a) Motions (b) Letter of request to Minister (and Ontario Municipal Board if required) (c) Date of approval by Minister (d) Date of approval by Ontario Municipal Board III.' DISPOSITION BY ONTARIO PARKS INTEGRATION BOARD IV. LAND VALUES (a) Ownership and cost to vendor (b) Authority appraisal V. AGREEMENTS - MANAGEMENT OR OTHER AGREEMENTS VI. MINISTER'S APPROVAL RE GRANT C -9 I. DETAILS OF PROJECT (a) Location and DescrAption: The section of the creek under consideration is in the Village of Malton and extends from Airport Road to a point approximately 3,000 feet west of Airport Road. The West Branch of the creek runs partly through the CNR station yard and partly through undeveloped ground and is adjacent to residential and commercial property. The Hull Street watercourse runs almost entirely through undeveloped ground and, where adjacent to Hull Street, the watercourse is immediately north of the street with residential property located immediately south of Hull Street. Extensive residential and commercial development has taken place on the flood plain, and flooding of property adjacent to the creek frequently occurs. At times of high flow, flooding is aggravated by backwater effects resulting from the constrictions imposed by bridges over the creek at Airport Road and North Alarton Street. The work proposed involves the widening and deepening of the existing channel for the West Branch of thr: creek, with local improvements to the channels at Ai. :port Road and North Alarton Street bridges and the provision of a new channel for the Hull Street water, course. A new culvert will he required to carry the Hull Street .:: atercourse under the CNR right -of -way. The location of this culvert is shown at a point approximately 3,000 feet west of the intersection of Airport Road and the West branch of the creek and is at a point ,where an existing 31 x 4' masonry culvert passes under the railway. It should be noted, however, that the location of this new culvert may be adjusted to suit the limits of subdivision or other proposed development in this area. At the upstream limit of thl proposed improvements to the West Branch, dykes will be formed from the banks of the riew channel and rising to marry with a natural ground elevation of 555 feet or. C -10 I. DETAILS OF PROJECT (a) Location and Description (Contd.) both sides of the channel. This will,contain the flooding which will occur upstream of the improved section. Since the creek channel is formed in overburden and the water velocities are high, it will be necessary to line the full length of the channel. The section proposed has side slopes of 2 horizontal to 1 vertical and incorporates a granular filter layer placed under the lining. The lining may be either gabions or grouted riprap and current prices indicate that gabions are slightly more economical. These improvements will allow the new channels to pass the design flow, which originates upstream of the area under consideration, through this flood - vulnerable area and on downstream of Airport Road. However, it should be noted that existing low - lying ground on either side of the new channel between Airport Road and the confluence of the West Branch and the Hull Street watercourse will lie below the maximum water level in the new channel. This would result in flooding of these areas, due to local precipitation, t during the periods when the new channel is at maximum water level. This problem can be eliminated in the area south of the new channel, where it occurs to a very limited extent, by placing fill material to raise the ground level above the maximum water level in the channel. The land in this area is mainly a CNR yard and does not appear to be developed at present. In the area north of the new channel, low dykes will be required to contain the maximum flow in the new channel. It should be noted that this condition occurs only at particularly low areas, notably immediately downstream of the confluence of the new channels and again downstream of the timber trestle bridge. It is recommended that these low areas are drained by intake basins, piped to the new channel and fitted with a flap valve at the outlet. Assuming that the Hull Street watercourse is diverted to the north of the CNR right -of -way, the existing open ditch channel of the watercourse adjacent to Hull Street will be adequate to handle the local storm water. However, to allow for development of the land C -11 1. DETAILS OF PROJECT (a) Location and Description (Contd.) lying between Hull Street and the CNR right -of -way, it is recommended that the open ditch be replaced with a storm water sewer laid in the existing channel bed. This new sewer would follow, approximately, the line of the existing Hull Street water- course and would utilize the existing culverts to pass under North Alarton Street and the CNR track. C -12 I. DETAILS OF PROJECT (b) Purpose of Project: The purpose of this Project is to enable the Metropolitan Toronto and Region Conservation Authority to undertake channel improvement measures to provide flood protection on the Mimico Creek in the Village of Halton immediately upstream of Airport Road. I. DETAILS OF PROJECT (c) Costs: C -13 Schedule 'A' $420,000. tt /BI 190,000. tt fcf 90,000. ft fDf 100,000. $800,000. Allowance for easement rights 50,000. Survey, legal, interest and contingency 50,000. TOTAL $900,000. C -14 I. DETAILS OF PROJECT (d) Financing:_ (1) The Authority proposes to raise the money required for this Project in the years 1970 and 1971, on the following basis: 1970 1971 Total Authority Share $225,.000. $225,000. $450,000. Province of Ontario Grant 225,000. 225,000. 450,000. TOTAL $450,000. $450,000. $900,000. (2) The Municipalities of the Town of Mississauga and the Township of Chinguacousy are hereby designated as the benefiting municipalities and shall be levied the Authority's share of the cost, as follows: 1970 Total Town of Mississauga $131,000. $131,000. $262,000. Township of Chinguacousy 94,000. 94,000. 1$$,000. TOTAL $225,000. $225,000. $450,000. SCHEDULE "B" C -15 METROPOLITAN TORONTO AND REGION CONSERVATION AUTHORITY PROJECT W.C. -58 "A PROJECT FOR EROSION CONTROL AND CHANNEL IMPROVEMENTS ON THE WEST BRANCH OF THE DON RIVER BETWEEN BATHURST STREET AND FINCH AVENUE" Submitted for Approval to the Honourable Minister of Energy and Resources Management May, 1970 C -16 CONTENTS OF BRIEF I. DETAILS OF PROJECT (a) Location and description .(includ' reaps and pictures (b) Purpose of project (c) Costs (d) Financing II. AUTHORITY APPROVAL AND REQUESTS (a) Motions (b) Letter of request to Minister (and Ontario Municipal Board if required) (c)' Date of approval by Minister (d) Date of approval by Ontario Municipal Board III. DISPOSITION BY ONTARIO PARKS INTEGRATION BOARD IV . LAND VALUES (a) Ownership and cost to vendor (b) Authority appraisal V. AGREEMENTS - MANAGEMENT OR OTHER AGREEMENTS VI. MINISTER'S APPROVAL RE GRANT I. DETAILS OF PROJECT C -17 (a) Location and Description The work proposed under this Project is located immediately' upstream of Bathurst Street as indicated on the accompanying drawing. The river follows the west side of the valley and the stability of the high bank is affected by undermining as a result of erosion of the toe of the slopes by the river. Unless this condition is controlled, the steep banks will eventually recede, endangering development along the top of the bank. In addition, there are two sharp oxbows or return bends which are dangerous to the facilities of the Y.M.H.A. property located on the west side of Bathurst Street immediately north of the river. Channelization work is to be carried out as shown on the accompanying drawing. In order to maintain the desired channel cross section and alignment, it is proposed that the channel be lined, preferably with stone- filled gabion baskets. The realigned channel will be some 1,000 feet shorter than the existing channel, with a consequent steeper gradient. In order to control velocities within acceptable limits, it is proposed that a structure to dissipate the excess hydraulic energy be constructed near the up- stream end of the proposed channel. The abandoned sections of the existing river channel will be filled, using excavated material, and these areas will be sodded and /or seeded as may be required. c -18 I. DETAILS OF PROJECT (b) Purpose of Project The purpose of this Project is to enable the Metropolitan Toronto and Region Conservation Authority to carry out erosion control and channel improvement measures on the west branch of the Don River in that section of the watercourse immediately upstream of Bathurst Street. implementation of this work will afford the river a more suitable approach to the Bathurst Street bridge opening, protect established utilities, including the West Don Sanitary Trunk Sewer, and eliminate serious erosion in this area, with a consequent reduction of the silt load carried by the river. I. DETAILS OF PROJECT (c) Cos Realignment and channelization of the river for a distance of some 1600 feet upstream from Bathurst Street: C ;i9 Excavation, Shaping and Grading $ 70,000.00 Gabions $175,000.00 Dewatering $ 23,000.00 Concrete Spillway & Cut•.Off Wall $ 60,000.00 Seeding, Sodding and Planting $ 35,000.00 Foot Bridges $ 25,000.00 Parking Area Restoration and Replacement $ 12,000.00 Model Study $ 6,000.00 Engineering Services $ 70,000.00 Interest and Contingencies $ 21i.,000,00 TOTAL $500,000.00 t, r_ C -20 1. DETAILS OF PROJECT (d) Financing (1) Costs Total Cost of Project $500,000.00 Authority Share $250,000.00 Government Share $250,000.00 (2) Benefiting Municipalities The Municipality of Metropolitan Toronto has agreed to be benefiting municipality and to raise $250,000. toward the cost of this work II. AUTHORITY APPROVAL AND REQUESTS (a) Motions THE MUNICIPALITY OF METROPOLITAN TORONTO Clerk's Department 2nd Floor, City Hall, Toronto 1. F. L. Lunn, Esq., Secretary - Treasurer, Metropolitan Toronto and Region Conservation Authority Box 720, Woodbridge, Ontario. Dear Sir: C -21 June 11, 1969. I am enclosing for your information the appended Clause No. 3 of Report No. 8 of the Parks and Recreation Committee, headed "Respecting Erosion Control iri West Don Valley - Finch Avenue to Bathurst Street ", which was adopted, without amendment, by the Council of The Municipality of Metropolitan Toronto on June 10, 1969. A :Hall /pgl Enclosure. Yours truly, (SIGNED) A. HALL Deputy. Metropolitan Clerk. " The Technical Advisory Committee on Parks and Conservation considered this matter at its meeting held on Thursday, May 22, 1969, and made the following recommendations: (1) that the Metropolitan Corporation should request the Metropolitan Toronto and Region Conservation Authority to prepare a scheme for the approval of the Province of Ontario to carry out remedial measures with respect to erosion in the area of the Y.M.H.A. upstream from Bathurst Street, at an estimated cost of $500,000.00, naming the Municipality of Metropolitan Toroflo as the benefiting municipality, the work to be carried out in 1970 provided that the Borough of North York (and /or the Y.M.H.A.) provide two thirds of the financing required for the Metropolitan share of the undertaking; (2) that the Y.M.H.A. grant a public right -of -way through its property as access to public parkland of the future to the north.at a location to be defined following construction; (3) that funds be provided in the Metropolitan Toronto and Region Conservation Authority Capital Estimates in 1970 as a specific item to enable this work to be C -22 II. AUTHORITY APPROVAL AND REQUESTS (a) Motions completed, this sum to be additional to the $50,000.00 already provided for erosion control on private properties which will be utilized to deal with top priority items as suggested in the James F. MacLaren report now under preparation; and (4) that the appropriate Metropolitan Officials be authorized and directed to take the necessary action to give effect to the fore- going.n SCHEDULE "C" C -23 METROPOLITAN TORONTO AND REGION CONSERVATION AUTHORITY PROJECT W.C.-64 HA PROJECT FOR EROSION CONTROL AND BANK STABILIZATION ADJACENT TO THE MARKHAM DISTRICT HIGH SCHOOL IN THE TOWN OF MARKHAM't Submitted for Approval to The Honourable Minister of Energy & Resources Management May, 1970 C -24 CONTENTS OF BRIEF I. DETAILS OF PROJECT (a) Location and description (including maps and pictures) (b) Purpose of project (c) Costs (d) Financing II. AUTHORITY. APPROVAL AND REQUESTS (a) Motions (b) Letter of request to Minister (and Ontario Municipal Board, if required) (c) Date of approval by Minister (d) Date of approval by Ontario Municipal Board III. DISPOSITION BY ONTARIO PARKS INTEGRATION BOARD IV. LAND VALUES (a) Ownership and cost to vendor (b) Authority appraisal V. AGREEMENTS - MANAGEMENT OR OTHER AGREEMENTS VI. MINISTER'S APPROVAL RE GRANT C -25 I. DETAILS OF PROJECT (a) Location and Description: The proposed remedial works to be undertaken in connection with this Project are to be located on a tributary of the Rouge River at the westerly limit of the Markham District High School, immediately south of Church Street in the Town of Markham. It is proposed to relocate the channel (as shown on the accompanying plan) away from the main valley slopes and that trees be planted to more positively resist erosion on the valley slopes during times of high water. The channel location selected follows as closely as possible the existing channel and requires no structural concrete work at the culvert. Erosion of the outer bank immediately south of the culvert during extreme flooding (50 -year and 25 -year storms) is controlled by gabions installed on a slope and extending vertically to an elevation equal to the obvert of the culvert. This higher' protection diminishes as the watercourse completes its bend and presumably allows the water to spread over the valley at a diminished velocity. The channel is fixed in its alignment and grade using gabions which would be required on the slopes only in the upper portion, but would be required as well in the invert at the lower end, particularly at the points of discharge of the storm sewers, all as shown on the drawing. C -26 I. DETAILS OF PROJECT (b) Purpose of Project: The purpose of this Project is to enable the Metropolitan Toronto and Region Conservation Authority to carry out erosion control and bank stabilization measures in the Town of Markham, in order to protect the westerly extension of the Markham District High School. I. DETAILS OF PROJECT (c) Costs: C -27 Channel Excavation and Gabion Lining $14,000. Re- locate outfall structure 4,000. Sodding, Tree Planting, etc. 2,000. Engineering 2,000. Interest and contingencies 3,000. TOTAL $25,000. C -2$ I. DETAILS OF PROJECT (d) Financing: (1) Costs Total Cost of Project $25,000. Authority Share $12,500. Government Share 12,500. (2) Benefiting Municipality The Town of' Markham is hereby designated as benefiting municipality and will be required to raise $12,500. toward the cost of this work.