Middle River of Pictou Middle River of Pictou Water Availability Final Report December 17, 2015 Prepared for: Middle River of Pictou Water Availability Final Report Province of Nova Scotia This report is protected by copyright and was prepared by R.V. Anderson Associates Limited for the account of the Province of Nova Scotia. It shall not be copied without permission. The material in it reflects our best judgment in light of the information available to R.V. Anderson Associates Limited at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. R.V. Anderson Associates Limited accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.” RVA 153094 December 17, 2015 Middle River of Pictou Water Availability MIDDLE RIVER OF PICTOU WATER AVAILABILITY TABLE OF CONTENTS EXECUTIVE SUMMARY ............................................................................ 1  1.0  INTRODUCTION ............................................................................... 2  1.1  1.2  2.0  WATERSHED DESCRIPTION.......................................................... 4  2.1  2.2  3.0  Flow Duration Analysis ................................................................ 7  Low Flow Frequency Analysis ..................................................... 8  Reservoir Storage ......................................................................... 8  WATER AVAILABILITY ................................................................... 9  4.1  4.2  5.0  Hydrometric Data .......................................................................... 4  Middle River Reservoir Fish Ladder ............................................ 5  HYDROLOGIC ANALYSIS ............................................................... 7  3.1  3.2  3.3  4.0  Scope of Work ............................................................................... 3  Approach ....................................................................................... 3  Environmental Protection Requirements .................................... 9  Sustainable Water Withdrawal Rate .......................................... 10  HYDROLOGIC CHANGES ............................................................. 12  5.1.1  Climate Projections..................................................................... 12  6.0  CONCLUSIONS .............................................................................. 14  LIST OF TABLES Table 2.1 – Flows Prorated from Middle River at Rocklin to the Granton Water Intake  Table 2.2 – Granton Water Intake – Monthly Demand Summary  Table 3.1 – Prorated Exceedance Flows (m3/s) for Middle River at Granton Water Intake  Table 3.2 – Low Flow Estimates (m3/s) for the Middle River at the Granton Water Intake  Table 4.1 – Middle River Monthly 85% Exceedance Probability Flows  Table 4.2 – Middle River Water Availability during a Typical Year  Table 5.1 – Climate Change Projections for Pictou, NS  LIST OF FIGURES Figure 1.1 – Water withdrawal location.  LIST OF APPENDICES Appendix A – Sustainable Withdrawal Rate Calculation Spreadsheet Appendix B – Fish Ladder Construction Drawings Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 1 EXECUTIVE SUMMARY R.V. Anderson Associates Limited (RVA) was retained by the Province of Nova Scotia to determine the surface water availability for the Middle River of Pictou at Granton and estimate a sustainable water withdrawal rate from the Middle River Reservoir. The scope of work for this hydrologic study included the review and summary of existing information, a description of the hydrology of the Middle River and hydrologic analyses of the Middle River stream flow and reservoir. The sustainable water withdrawal rate for the Granton water intake was determined to be 1.10 m3/s (95,040 m3/day), which considered the anticipated effects of climate change. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 1.0 Page 2 INTRODUCTION R.V. Anderson Associates Limited (RVA) was retained by the Province of Nova Scotia to determine the surface water availability for the Middle River of Pictou at Granton. The intent of this hydrologic review is to determine stream flow rates throughout the year to estimate allowable and sustainable water withdrawal rates. There is an existing water intake located at Pump House Road in Granton (N45°37’53.2”, W062°44’22.3”), approximately 500 m upstream of the dam that forms the Middle River Reservoir (circled on the figure below). Water Intake Middle River of Pictou Figure 1.1 – Water withdrawal location. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 1.1 Page 3 Scope of Work The scope of work for this hydrologic study included the following:  Gathering, review and summary of existing information, including previous hydrologic studies, hydrometric data, climatic data, and mapping.  Descriptive hydrology to define stream flow rates for the Middle River.  1.2 o tabulation of average annual, monthly, and daily flows (flow rates and volumes) and observed extreme low flows (flow rates) for the Environment Canada Middle River hydrometric station, o proration of selected flows to the study location, and o identification of hydrometric records that are typical of average and low flow years. Hydrologic analyses of the Middle River stream flow. o annual, monthly and seasonal flow duration analyses, o low flow frequency analysis, and o plotting and analysis of mass curves to determine the probability of surface water availability. Approach The surface water availability for extraction is referred to as the “safe yield” of a watershed. It is a measure of the probability that sufficient quantities of water are available to satisfy a withdrawal demand (either from direct stream flow or reservoir storage) while maintaining an environmental flow or aquatic protection flow, for both current and future conditions. In the context of this report, the term safe yield is intended as a water withdrawal rate with a given probability of being satisfied. Even though this probability may be small, it is not zero, and there is a chance that the demand for water withdrawal may not be met. The determination of safe yield, or the probability of sufficient surface water availability, consists of the following components:  an evaluation of the water available directly from the Middle River as stream flow,  a evaluation of the water available from the Middle River Reservoir storage,  an evaluation of the Middle River stream flow required for environmental or aquatic habitat protection, and  an evaluation of the potential for changes in the hydrologic regime (urbanization and climate change) that could affect the availability of water in the foreseeable future. Flow estimates for Middle River at the water intake were prorated from the hydrometric records of the upstream gauged station maintained by Environment Canada at Rocklin. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 2.0 Page 4 WATERSHED DESCRIPTION The Middle River, East River and West River of Pictou converge in Pictou Harbour and discharge to the Northumberland Straight. The Middle River flow regime was altered with the construction of the causeway at Abercrombie Point (1967) and the dam and spillway at Granton which impounds flow at the mouth of the Middle River. The Middle River watershed has a drainage area of 239 km2 at the water intake location in Granton. The reservoir upstream of the dam in Granton has a surface area of 5.2 km2 and provides storage for water withdrawal during periods of low stream flow. The water surface area of the reservoir was delineated using Google Earth Pro imagery and confirmed using imagery from the ESRI site (showed the water surface area to be approximately 5.4 km2). As no detailed bathymetric information was available for the reservoir, the size of the reservoir water surface was checked during different times of the year (October 05, 2003, June 09, 2004, July 03, 2007, June 18, 2012 and August 16, 2013) using historic imagery from Google Earth Pro and was found to be highly invariable with little change in the location of the shoreline on the above images. This indicates relatively steep shorelines which would be consistent with flooding of valley walls (artificial reservoir) rather than the flatter shorelines of natural reservoirs. The water surface elevation in Google Earth Pro is shown at 10 ft but does not change for the different images, indicating this elevation is associated with the latest August 2013 data (please note the elevation resolution is plus or minus 1 foot). For the purposes of this water availability study, the water surface area of the reservoir was assumed to be constant at 5.2 km2 (more conservative than the 5.4 km2 area measured from the ESRI data) for the range of water surface elevations analyzed. There is a hydrometric station on the Middle River at Rocklin (01DP001, drainage area 92.2 km2), approximately 17 km upstream of the water intake at Granton. This station is expected to provide representative unit flow rates for the Middle River as development within the watershed is sparse in both the upper and lower regions. 2.1 Hydrometric Data Flow data for the Middle River of Pictou hydrometric station at Rocklin was acquired from the Environment Canada HYDAT database. This data spanned from 1965 to 2012 and included a record of all daily flows, mean monthly flows, and flow extremes (maximum and minimum). This data was prorated based on drainage area from the Rocklin hydrometric station (92.2 km2) to the water intake location at Granton (239 km2). Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 5 Table 2.1 – Flows Prorated from Middle River at Rocklin to the Granton Water Intake Flows (m3/s) 2.2 Extreme Daily flows (m3/s) Average Min Max Min Max January 6.80 0.91 18.3 0.18 93.3 February 5.79 0.39 16.1 0.16 116.9 March 10.1 0.77 22.0 0.20 129.6 April 14.0 4.92 27.5 1.14 109.6 May 8.20 2.22 26.4 0.90 88.1 June 3.88 0.76 22.8 0.17 131.4 July 1.96 0.19 7.70 0.02 80.4 August 2.25 0.04 12.9 0.01 121.8 September 2.85 0.24 19.3 0.01 70.8 October 5.99 0.45 18.2 0.14 96.7 November 10.2 1.55 21.3 0.29 130.1 December 10.1 2.06 19.3 0.99 130.4 Full Year 6.87 4.22 10.0 0.01 131.4 Winter 7.56 -- -- -- -- Spring 8.69 -- -- -- -- Summer 2.35 -- -- -- -- Fall 8.76 -- -- -- -- Middle River Reservoir Fish Ladder The fish ladder at the Middle River Reservoir spillway is operated by Nova Scotia Department of Internal Services. This ladder was designed by DFO and is intended to protect and maintain fish passage between the Middle River and Pictou Harbour. An asbuilt survey of the fish ladder dated December 09, 2015 was used as the basis to calculate the minimum reservoir water level elevation and is attached in Appendix B. It should be noted that all elevations and water levels noted on the drawing as well as the tidal levels and reservoir operating levels discussed in the following paragraphs are referenced to geodetic datum. These elevations are presented in Imperial units throughout the report to be consistent with the survey drawing and fish ladder operations. The minimum water level in the reservoir is governed by Baffle 9 in the fish ladder, which has a concrete crest elevation of 6.0 ft. This elevation is above the higher high water elevation for a large tide (2.8 ft) and is sufficient to prevent the backflow of brackish water into the reservoir. The Middle River fish ladder was originally designed to convey 0.21 m3/s with an increase to 0.42 m3/s between April 21 and May 21 to improve downstream smolt migration. Subsequent modifications, including the installation of metal chutes, reduced the minimum flow requirement for fish passage upstream through the fish ladder to Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 6 0.14 m3/s with an increase to 0.42 m3/s between April 21 and May 21 (DFO personal correspondence). The proper functioning of the fish ladder during periods of low flow at 0.14 m3/s would require a 1.0 ft flow depth over Baffle 9 (flow control) or a water level at the obvert of the orifice in Baffle 9, i.e. 1.25 ft flow depth (fish passage). This converts to reservoir water level elevations of 7.0 ft and 7.25 ft, respectively, with the second more conservative scenario governing the design (minimum reservoir water level elevation required to ensure fish passage is 7.25 ft geodetic datum). Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 3.0 Page 7 HYDROLOGIC ANALYSIS The hydrologic information presented in this section forms the basis of determining water availability from both direct stream flow and reservoir storage. The availability of water in the context of environmental flows, climate change and safe yield is presented later in Section 6. 3.1 Flow Duration Analysis Flow duration analyses were used to determine the percent of time specified daily discharges were equaled or exceeded during a given period. If the period used for flow duration analyses represents the long-term flow of a stream, the results can be used to predict the distribution of future flows for water extraction. Flow duration analyses were completed for the entire year, for each month and for each season. Table 3.1 summarizes the prorated 50%, 75%, 90%, and 95% exceedance flows (i.e. the daily flows that are exceeded 50%, 75%, 90% and 95% of the time) at the water intake. The 50% exceedance flow represents the median flow for each period, while the 75%, 90%, and 95% exceedance flows are commonly used as hydrologic indices to describe low flows. Table 3.1 – Prorated Exceedance Flows (m3/s) for Middle River at Granton Water Intake Exceedance Probability 50% 75% 90% 95% January 3.94 2.13 1.12 0.58 February 3.08 1.61 0.73 0.39 March 5.47 2.72 1.17 0.64 April 9.69 6.48 4.20 1.92 May 5.44 3.01 1.86 1.46 June 1.94 1.17 0.72 0.53 July 0.90 0.44 0.21 0.11 August 0.67 0.24 0.12 0.04 September 0.90 0.43 0.20 0.10 October 2.59 1.07 0.45 0.27 November 6.71 3.19 1.78 1.21 December 6.22 3.89 2.05 1.45 Full Year 3.37 1.22 0.41 0.20 Winter 4.15 2.20 1.12 0.72 Spring 6.32 3.08 1.68 1.30 Summer 0.86 0.39 0.17 0.08 Fall 4.72 1.84 0.73 0.42 Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 3.2 Page 8 Low Flow Frequency Analysis Low flow frequency analyses detail the probability and magnitude of extreme flows (in this case droughts). Extreme flows are often specified as having a return period (or exceedance probability). For example, 1.01-year, 10-year, and 20-year return periods based on annual series low flow analyses are equivalent to probabilities of occurrence in any year of 99%, 10%, and 5%, respectively. Lower flow events would occur less frequently and thus have a greater return period or lower probability of occurrence. Usually, for low flows, the duration of an extreme event is also specified. The duration of the event is the time the flow condition would continue, with longer durations generally resulting in greater ecological consequences. The average of low flows over a longer duration, as determined by statistical analyses, should be greater than the extreme low flow experienced during a shorter period. Where a one-year, one-day duration low flow is an indicator of an annual extreme daily low flow, flows of seven days in duration are more indicative of average flows during drought conditions. The drought durations chosen for analysis were one-day, seven-day, and 14-day, which are commonly used in this type of low flow investigation. The low flow estimates for the Middle River water intake are presented in Table 3.2. Table 3.2 – Low Flow Estimates (m3/s) for the Middle River at the Granton Water Intake 3.3 Low Flow Events (1965-2012) 1 Day Duration Lowest on Record (2001) 0.004 0.005 0.006 Annual Average 0.119 0.334 0.418 Highest on Record (1977) 0.496 1.478 1.970 10 Year Return Period 0.080 0.104 0.130 7 Day Duration 14 Day Duration Reservoir Storage The Middle River Reservoir serves as a source of water during periods of low flows that could mitigate drought conditions. Therefore, the controlling factor affecting of water availability during low flow periods may not be the stream flow but rather the reservoir storage volume. The Middle River Reservoir has a surface area of approximately 5.2 km2. A 0.1 m drawdown in water level represents an extraction rate of 0.86 m3/s over 7 days, 0.43 m3/s over 14 days or 0.20 m3/s over 30 days during drought conditions. These values do not account for stream flow recharge to the reservoir, which was shown in 2001 to be extremely low during severe drought conditions. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 9 4.0 WATER AVAILABILITY 4.1 Environmental Protection Requirements In order to ensure that water extraction does not deplete the remaining flow in the Middle River to a level that causes damage to the aquatic habitat, environmental protection flows or maintenance flows (minimum flows that are to remain in watercourses) are typically specified by regulatory and permitting agencies. The primary agencies that regulate water withdrawal are Nova Scotia Environment (NSE, provincial) and the Department of Fisheries and Oceans (DFO, federal). The situation at the Granton water intake is not typical of water extraction from a freeflowing watercourse. The Middle River Reservoir discharges directly to the tidal estuary upstream of the Pictou Causeway. This does not include a connecting section of natural watercourse that would have low flow concerns. As such, an environmental protection flow is not needed for the watercourse at or downstream of the Granton water intake. Fish migration between the Middle River and Pictou Harbour, therefore, becomes the primary concern in determining an aquatic protection flow. The sustainable water withdrawal rate for the Granton intake was determined based on the following three (3) criteria: 1. Minimum fish ladder design flows are maintained at all times prior to water withdrawal. a. April 21 to May 21: 0.42 m3/s b. Rest of the year: 0.14 m3/s 2. Maximum allowable operational reservoir water level drawdown is to be 6.75 ft. This accounts for drawdown from a full reservoir operating level of 15.0 ft in the spring to 8.25 ft in the summer/fall. The full reservoir water level elevation at the end of the spring freshet was selected at 15.0 ft as this is the maximum water level elevation fully contained on property owned by the Province of Nova Scotia and is the maximum normal operating water level of the reservoir. The minimum reservoir water level elevation was selected at 8.25 ft based on a minimum reservoir water level elevation of 7.25 ft needed for proper functioning of the fish ladder (see Section 2.3) plus a 1.0 ft allowance for evaporative losses from the reservoir. This 1.0 ft allowance was deemed to be needed to correct for the higher percentage of lakes and swamps and resulting evaporative losses for the entire watershed compared to the gauged upper portion of the watershed. These drawdown calculations also include steam flow recharge as noted below. 3. Stream flow into the reservoir equals monthly flows with an 85% exceedance probability. These are the flows that historically would be exceeded on 85% of the days during each month, represent a reasonably conservative estimate of inflow into the reservoir (based on a comparison to other environmental protection flows), and are presented in Table 4.1. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 10 Table 4.1 – Middle River Monthly 85% Exceedance Probability Flows 85 % Exceedence Prob Flow (m3/s) % Exceedence Prob Flow (m3/s) 4.2 January 1.53 July 0.26 February 0.99 August 0.17 March 1.70 September 0.27 April 5.24 October 0.65 May 2.36 November 2.08 June 0.88 December 2.83 Sustainable Water Withdrawal Rate A maximum sustainable withdrawal rate of 1.10 m3/s satisfies all three of the environmental requirements described in the previous paragraphs. Table 4.2 presents the monthly flow summary and estimated reservoir water levels associated with a sustainable withdrawal rate of 1.10 m3/s during a year with monthly flows that are exceeded 85% of the time. Table 4.2 – Middle River Water Availability during a Typical Year Sustainable Fish Ladder Total Flow 85 % Exceed Reservoir Reservoir Design Flow Requirement Prob Flow Withdrawal Gauge Ht Yield 3 (m3/s) (m3/s) (m3/s) (%) (ft) (m /s) Jan 1.10 0.14 1.24 1.53 -- 12.9 Feb 1.10 0.14 1.24 0.99 0.25 12.5 Mar 1.10 0.14 1.24 1.70 -- 13.3 Apr 1.10 0.42 1.52 5.24 -- 15.0 May 1.10 0.42 1.52 2.36 -- 15.0 Jun 1.10 0.14 1.24 0.88 0.36 14.4 Jul 1.10 0.14 1.24 0.26 0.98 12.7 Aug 1.10 0.14 1.24 0.17 1.07 10.9 Sept 1.10 0.14 1.24 0.27 0.97 9.3 Oct 1.10 0.14 1.24 0.65 0.59 8.3 Nov 1.10 0.14 1.24 2.08 -- 9.7 Dec 1.10 0.14 1.24 2.83 -- 12.4 The data presented in Table 4.2 indicate that withdrawal from the reservoir storage would typically be required from June until October, with water levels rebounding above 12 ft by the start of the year. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 11 Withdrawal rates higher than the sustainable rate of 1.10 m3/s could be safely accommodated during April and May as long as the reservoir levels are maintained at gauge height of 15.0 ft. The water withdrawal rates could also be increased partway through the summer if the reservoir levels exceed those presented in Table 4.2. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 5.0 Page 12 HYDROLOGIC CHANGES The low population density and low population growth within the Middle River basin indicates that increased urbanization within the developed areas is not likely to significantly increase the volume of runoff from the watershed as a whole. As such, the effects of future land-use changes on hydrology were assumed to be minimal. Climate change is expected to have a greater impact on the Middle River hydrology. Although uncertainties as to the magnitude of the effects of climate change on low flows makes quantification of these impacts difficult, a general evaluation of the potential effects of climate change was performed and the results are presented below. An increasing body of observations indicates changes in climate, the most noticeable observations being a gradual warming and an increase in precipitation of 0.5% to 1% per decade in the 20th century over most mid- and high latitudes of the Northern Hemisphere (IPCC, 2001a). Evidence exists that most of the warming observed over the last 50 years is attributable to human activities. Furthermore, emissions of greenhouse gases and aerosols due to human activities continue to alter the atmosphere in ways that are expected to affect the climate for many centuries (IPCC, 2001a). Predictions of the future effects of climate change are primarily based on a number of Global or General Circulation Models (GCMs) that predict increases in the global average temperature and sea level under all scenarios modelled by the Intergovernmental Panel on Climate Change (IPCC). The globally averaged surface temperature is projected to increase between 1.4°C and 5.8°C over the period 1990 to 2100, with nearly all land areas warming more rapidly than this global average. In addition, precipitation is projected to increase during the 21st century, especially during the second half of the 21st century over northern mid- to high latitudes (IPCC, 2001a). Climate change will affect hydrological systems, as precipitation is the main driver of variability in the water balance over both space and time (IPCC, 2001b). The frequency of low flows is affected primarily by changes in the seasonal distribution of precipitation, its year-to-year variability, and the occurrence of prolonged droughts (IPCC, 2001b). Increased temperatures, in effect, reduce the snow pack storing water during winter. Furthermore, if a smaller proportion of precipitation during winter falls as snow, there is proportionately more runoff in winter and, as there is less snow to melt, less runoff during spring. 5.1.1 Climate Projections The Province of Nova Scotia and Environment Canada commissioned a study entitled Adapting to a Changing Climate in Nova Scotia: Vulnerability Assessment and Adaptation Options (published September 2005, DeRomilly and deRomilly Limited, Dillon Consulting Limited, Allan Bell Environmental Management Services, Cameron Consulting, and Environment Canada). This report identified key issues related to climate change, the impacts associated with changes and a recommended framework for adapting to the potential climate changes. The following points were among the key findings associated with surface water availability.  Potential for increased variability in the quality and quantity of regional water resources. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability Page 13  Projected climate change likely to alter snow and rainfall patterns, resulting in less frequent, but heavier precipitation earlier than present (April rather than May).  It is anticipated that less water is likely to be available for consumption, agriculture and recreation with more conflicts over use.  Longer and warmer summers likely to result in more droughts. The Climate Change Nova Scotia website (https://climatechange.novascotia.ca/climatedata) provides climate change projections for the various regions of the province. The relevant parameters for the Middle River watershed are presented in the table below. Table 5.1 – Climate Change Projections for Pictou, NS Historical 1980s Parameter Projected 2020s Projected 2050s Projected 2080s Annual 5.7 6.8 8.0 9.2 Winter -5.4 -4.3 -3.0 -1.7 Spring 3.5 4.4 5.5 6.6 Summer 16.8 17.8 19.0 20.1 Fall 8.1 9.2 10.3 11.5 3.1 6.3 11.6 18.6 Annual 1,383 1,416 1,424 1,462 Winter 364 378 385 404 Spring 324 334 340 352 Summer 292 297 294 295 Fall 404 407 404 411 Days With Rain 108.2 120.7 124.2 127.1 Days With Snow 35.0 51.7 45.2 38.8 Temperature (deg. C) Hot Days (Tmax > 30 deg. C) Precipitation (mm) The above projections indicate warmer temperatures and an increase in annual precipitation. This is no increase in summer precipitation and it is likely that changing precipitation patterns could make stream flow conditions more variable in the future. Storage within the reservoir is likely to help offset changing flow patterns. An overall increase in runoff volume should help the Middle River Reservoir to satisfy demands at the Granton water intake. The slightly increasing precipitation predictions also indicate that we can continue to rely on historic data as a predictor of runoff volume to the Middle River Reservoir. Province of Nova Scotia December 17, 2015 RVA 153094 Final Report Middle River of Pictou Water Availability 6.0 Page 14 CONCLUSIONS Based on the information presented in the previous sections of this report, the following conclusions were drawn. 1. The Middle River Reservoir discharges to the tidal estuary upstream of the Pictou Causeway. There is no section of free-flowing natural watercourse downstream of the Granton water intake that would have low flow concerns. As such, the fish ladder at the reservoir outlet is the only location where an aquatic protection flow is recommended. 2. The fish ladder at the Middle River Reservoir has a design flow of 0.42 m3/s for the period of April 21 to May 21 and 0.14 m3/s for the rest of the year. These design flows were used in all analyses as the minimum flows to be maintained at the reservoir outlet. 3. The minimum water level in the Middle River Reservoir to sustain fish passage through the fish ladder is 7.25 ft, geodetic. This represents the obvert elevation of the orifice in the fifth most upstream baffle (#9). 4. Climate change is likely to make the Middle River stream flow patterns more variable, however runoff volumes are not expected to decrease. Storage within the reservoir is likely to offset the changing flow patterns. As such the effects of climate changes are not expected to significantly impact the ability of the Middle River Reservoir to satisfy withdrawal demands. 5. Withdrawal rates higher than the recommended sustainable rate could be safely accommodated during April and May as long as the reservoir levels are maintained at gauge height of 15.0 ft. Water withdrawal rates could also be increased partway through the summer if the reservoir levels exceed those presented in Table 4.2. 6. The maximum sustainable withdrawal rate for the Granton intake is 1.10 m3/s (95,040 m3/day). Province of Nova Scotia December 17, 2015 RVA 153094 Final Report APPENDIX A Sustainable Withdrawal Rate Calculation Spreadsheet Middle River Water Availability November 10, 2015 Monthly Exceedence Prob Flows for Stn 01DP004 ‐ Middle River at Rocklin (Drainage Area = 92.2 km2) Prorated to Middle River Reservoir (Drainage Area = 239 km2) Table 1. Exceedance Probability Flows (m 3/s) Table 2. Subtract Fish Ladder Design Flows Exc  Prob % 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Exc  Prob % 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Jan 41.73 19.44 13.09 10.37 8.68 7.41 6.48 5.70 5.05 4.41 3.94 3.60 3.19 2.85 2.49 2.13 1.83 1.53 1.12 0.58 0 Feb 43.29 17.89 11.38 8.55 6.79 5.70 4.95 4.41 3.89 3.50 3.08 2.72 2.45 2.20 1.94 1.61 1.27 0.99 0.73 0.39 0 Mar 54.44 30.85 22.11 17.16 14.36 11.92 10.14 8.66 7.31 6.25 5.47 4.85 4.17 3.76 3.32 2.72 2.19 1.70 1.17 0.64 0 Apr 62.21 35.51 26.70 22.01 18.72 16.49 14.62 12.86 11.82 10.58 9.69 9.02 8.27 7.65 7.02 6.48 5.96 5.24 4.20 1.92 0 May 43.81 23.49 16.28 12.86 10.94 9.33 8.17 7.23 6.45 5.86 5.44 4.90 4.43 3.86 3.42 3.01 2.67 2.36 1.86 1.46 0 Jun 32.14 11.28 7.34 5.68 4.59 3.91 3.27 2.83 2.48 2.21 1.94 1.74 1.58 1.45 1.31 1.17 1.03 0.88 0.72 0.53 0 Jul 16.75 6.12 3.68 2.72 2.15 1.77 1.56 1.36 1.21 1.05 0.90 0.79 0.69 0.60 0.54 0.44 0.34 0.26 0.21 0.11 0 Aug 27.48 8.22 4.28 2.64 1.93 1.53 1.32 1.09 0.91 0.77 0.67 0.58 0.48 0.39 0.30 0.24 0.20 0.17 0.12 0.04 0 Sept 27.22 8.48 5.21 3.34 2.54 2.06 1.72 1.38 1.20 1.03 0.90 0.79 0.69 0.62 0.53 0.43 0.34 0.27 0.20 0.10 0 Oct 50.29 20.06 13.19 10.06 7.85 6.38 5.39 4.59 3.86 3.16 2.59 2.14 1.84 1.55 1.27 1.07 0.85 0.65 0.45 0.27 0 Nov 54.95 28.77 20.06 16.64 13.71 11.79 10.29 9.25 8.40 7.49 6.71 5.96 5.18 4.54 3.81 3.19 2.55 2.08 1.78 1.21 0 Dec 53.92 27.48 20.22 15.97 12.94 10.99 9.54 8.45 7.70 6.97 6.22 5.73 5.31 4.87 4.33 3.89 3.37 2.83 2.05 1.45 0 April/May Table 5. Monthly Reservoir Water Level Change (m) Exc  Prob % 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Days Exc  Prob % Jan Feb Mar Apr May Jun 0 20.86 19.74 27.40 30.25 21.78 15.40 5 9.38 7.81 15.25 16.94 11.31 5.00 10 6.10 4.76 10.75 12.55 7.60 3.04 15 4.70 3.43 8.20 10.21 5.84 2.21 20 3.83 2.61 6.76 8.57 4.85 1.67 25 3.18 2.09 5.50 7.46 4.02 1.33 30 2.70 1.74 4.58 6.53 3.42 1.01 35 2.30 1.49 3.82 5.65 2.94 0.79 40 1.96 1.24 3.13 5.13 2.54 0.62 45 1.63 1.06 2.58 4.51 2.23 0.48 50 1.39 0.87 2.18 4.07 2.02 0.35 55 1.22 0.70 1.86 3.74 1.74 0.25 60 1.00 0.57 1.51 3.36 1.50 0.17 65 0.83 0.45 1.30 3.05 1.21 0.10 70 0.64 0.33 1.07 2.74 0.98 0.04 75 0.46 0.18 0.76 2.47 0.77 ‐0.03 80 0.30 0.01 0.49 2.21 0.59 ‐0.10 0.15 ‐0.12 0.24 1.85 0.43 ‐0.18 85 90 ‐0.06 ‐0.24 ‐0.04 1.34 0.17 ‐0.26 95 ‐0.34 ‐0.40 ‐0.31 0.20 ‐0.03 ‐0.35 100 0 0 0 0 0 Feb 102.6 40.6 24.7 17.9 13.6 10.9 9.1 7.7 6.5 5.5 4.5 3.6 3.0 2.4 1.7 0.9 0.1 ‐0.6 ‐1.3 ‐2.1 0 31 28.25 Mar 142.5 79.3 55.9 42.6 35.1 28.6 23.8 19.9 16.3 13.4 11.3 9.7 7.9 6.7 5.6 4.0 2.5 1.2 ‐0.2 ‐1.6 0 31 Apr 157.3 88.1 65.3 53.1 44.6 38.8 34.0 29.4 26.7 23.5 21.2 19.4 17.5 15.9 14.3 12.9 11.5 9.6 6.9 1.0 0 30 May 113.3 58.8 39.5 30.4 25.2 20.9 17.8 15.3 13.2 11.6 10.5 9.1 7.8 6.3 5.1 4.0 3.1 2.3 0.9 ‐0.2 0 31 Jun 80.1 26.0 15.8 11.5 8.7 6.9 5.3 4.1 3.2 2.5 1.8 1.3 0.9 0.5 0.2 ‐0.2 ‐0.5 ‐0.9 ‐1.4 ‐1.8 0 30 Jul 41.5 13.1 6.5 4.0 2.4 1.4 0.8 0.3 ‐0.1 ‐0.5 ‐0.9 ‐1.2 ‐1.5 ‐1.7 ‐1.9 ‐2.2 ‐2.4 ‐2.6 ‐2.8 ‐3.0 0 31 Aug 70.3 18.7 8.1 3.8 1.8 0.8 0.2 ‐0.4 ‐0.9 ‐1.3 ‐1.5 ‐1.8 ‐2.0 ‐2.3 ‐2.5 ‐2.7 ‐2.8 ‐2.9 ‐3.0 ‐3.2 0 31 Sept Oct Nov 67.3 131.4 139.2 18.8 50.4 71.4 10.3 32.0 48.8 5.5 23.6 39.9 3.4 17.7 32.3 2.1 13.8 27.4 1.2 11.1 23.5 0.4 9.0 20.8 ‐0.1 7.0 18.6 ‐0.5 5.1 16.2 ‐0.9 3.6 14.2 ‐1.2 2.4 12.2 ‐1.4 1.6 10.2 ‐1.6 0.8 8.5 ‐1.8 0.1 6.7 ‐2.1 ‐0.5 5.1 ‐2.3 ‐1.1 3.4 ‐2.5 ‐1.6 2.2 ‐2.7 ‐2.1 1.4 ‐2.9 ‐2.6 ‐0.1 0 0 0 30 31 30 Dec 141.1 70.3 50.8 39.4 31.3 26.1 22.2 19.3 17.3 15.4 13.3 12.0 10.9 9.7 8.3 7.1 5.7 4.2 2.2 0.6 0 31 Other 3 0.14 m /s Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 41.59 43.15 54.30 61.79 43.39 32.00 16.61 27.34 27.08 50.15 54.81 53.78 19.30 17.75 30.71 35.09 23.07 11.14 5.98 8.08 8.34 19.92 28.63 27.34 12.95 11.24 21.97 26.28 15.86 7.20 3.54 4.14 5.07 13.05 19.92 20.08 10.23 8.41 17.02 21.59 12.44 5.54 2.58 2.50 3.20 9.92 16.50 15.83 8.54 6.65 14.22 18.30 10.52 4.45 2.01 1.79 2.40 7.71 13.57 12.80 7.27 5.56 11.78 16.07 8.91 3.77 1.63 1.39 1.92 6.24 11.65 10.85 6.34 4.81 10.00 14.20 7.75 3.13 1.42 1.18 1.58 5.25 10.15 9.40 5.56 4.27 8.52 12.44 6.81 2.69 1.22 0.95 1.24 4.45 9.11 8.31 4.91 3.75 7.17 11.40 6.03 2.34 1.07 0.77 1.06 3.72 8.26 7.56 4.27 3.36 6.11 10.16 5.44 2.07 0.91 0.63 0.89 3.02 7.35 6.83 3.80 2.94 5.33 9.27 5.02 1.80 0.76 0.53 0.76 2.45 6.57 6.08 3.46 2.58 4.71 8.60 4.48 1.60 0.65 0.44 0.65 2.00 5.82 5.59 3.05 2.31 4.03 7.85 4.01 1.44 0.55 0.34 0.55 1.70 5.04 5.17 2.71 2.06 3.62 7.23 3.44 1.31 0.46 0.25 0.48 1.41 4.40 4.73 2.35 1.80 3.18 6.60 3.00 1.17 0.40 0.16 0.39 1.13 3.67 4.19 1.99 1.47 2.58 6.06 2.59 1.03 0.30 0.10 0.29 0.93 3.05 3.75 1.69 1.13 2.05 5.54 2.25 0.89 0.20 0.06 0.20 0.71 2.41 3.23 1.39 0.85 1.56 4.82 1.94 0.74 0.12 0.03 0.13 0.51 1.94 2.69 0.98 0.59 1.03 3.78 1.44 0.58 0.07 ‐0.02 0.06 0.31 1.64 1.91 0.44 0.25 0.50 1.50 1.04 0.39 ‐0.03 ‐0.10 ‐0.04 0.13 1.07 1.31 0 0 0 0 0 0 0 0 0 0 0 Table 4. Monthly Flow Volumes (1,000,000 m 3) Jan 108.5 48.8 31.7 24.5 19.9 16.5 14.0 12.0 10.2 8.5 7.2 6.3 5.2 4.3 3.3 2.4 1.6 0.8 ‐0.3 ‐1.8 3 0.42 m /s Jul 7.99 2.51 1.26 0.76 0.47 0.27 0.16 0.06 ‐0.02 ‐0.10 ‐0.17 ‐0.23 ‐0.28 ‐0.33 ‐0.36 ‐0.41 ‐0.46 ‐0.50 ‐0.53 ‐0.58 0 Table 3. Subtract Sustainable Withdrawal Flow Exc Prob  % 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Jan 40.49 18.20 11.85 9.13 7.44 6.17 5.24 4.46 3.81 3.17 2.70 2.36 1.95 1.61 1.25 0.89 0.59 0.29 ‐0.12 ‐0.66 Feb 42.05 16.65 10.14 7.31 5.55 4.46 3.71 3.17 2.65 2.26 1.84 1.48 1.21 0.96 0.70 0.37 0.03 ‐0.25 ‐0.51 ‐0.85 0 Mar 53.20 29.61 20.87 15.92 13.12 10.68 8.90 7.42 6.07 5.01 4.23 3.61 2.93 2.52 2.08 1.48 0.95 0.46 ‐0.07 ‐0.60 0 Apr 60.69 33.99 25.18 20.49 17.20 14.97 13.10 11.34 10.30 9.06 8.17 7.50 6.75 6.13 5.50 4.96 4.44 3.72 2.68 0.40 0 May 42.29 21.97 14.76 11.34 9.42 7.81 6.65 5.71 4.93 4.34 3.92 3.38 2.91 2.34 1.90 1.49 1.15 0.84 0.34 ‐0.06 0 1.10 m3/s  Jun 30.90 10.04 6.10 4.44 3.35 2.67 2.03 1.59 1.24 0.97 0.70 0.50 0.34 0.21 0.07 ‐0.07 ‐0.21 ‐0.36 ‐0.52 ‐0.71 0 1.15 15.51 4.88 2.44 1.48 0.91 0.53 0.32 0.12 ‐0.03 ‐0.19 ‐0.34 ‐0.45 ‐0.55 ‐0.64 ‐0.70 ‐0.80 ‐0.90 ‐0.98 ‐1.03 ‐1.13 0 Aug 26.24 6.98 3.04 1.40 0.69 0.29 0.08 ‐0.15 ‐0.33 ‐0.47 ‐0.57 ‐0.66 ‐0.76 ‐0.85 ‐0.94 ‐1.00 ‐1.04 ‐1.07 ‐1.12 ‐1.20 0 Sept 25.98 7.24 3.97 2.10 1.30 0.82 0.48 0.14 ‐0.04 ‐0.21 ‐0.34 ‐0.45 ‐0.55 ‐0.62 ‐0.71 ‐0.81 ‐0.90 ‐0.97 ‐1.04 ‐1.14 0 Oct 49.05 18.82 11.95 8.82 6.61 5.14 4.15 3.35 2.62 1.92 1.35 0.90 0.60 0.31 0.03 ‐0.17 ‐0.39 ‐0.59 ‐0.79 ‐0.97 0 Nov 53.71 27.53 18.82 15.40 12.47 10.55 9.05 8.01 7.16 6.25 5.47 4.72 3.94 3.30 2.57 1.95 1.31 0.84 0.54 ‐0.03 0 Dec 52.68 26.24 18.98 14.73 11.70 9.75 8.30 7.21 6.46 5.73 4.98 4.49 4.07 3.63 3.09 2.65 2.13 1.59 0.81 0.21 0 May 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.08 0.00 Jun 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 14.89 14.65 14.40 14.13 10.90 0.00 Jul 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 14.95 14.68 14.42 14.23 14.06 13.89 13.80 13.51 13.12 12.73 12.37 8.96 0.00 Aug 15.00 15.00 15.00 15.00 15.00 15.00 15.00 14.74 14.39 13.88 13.45 13.10 12.76 12.44 12.19 11.80 11.34 10.89 10.44 6.90 0.00 Sept 15.00 15.00 15.00 15.00 15.00 15.00 15.00 14.97 14.31 13.53 12.88 12.35 11.86 11.40 11.01 10.46 9.85 9.29 8.72 5.01 0.00 Oct 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 13.91 12.88 11.94 11.06 10.16 9.17 8.26 7.36 3.34 0.00 Nov 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 13.40 11.35 9.67 8.25 3.28 0.00 Table 6. Estimated Reservoir Water Level (ft) Aug Sept Oct Nov Dec 13.51 12.95 25.26 26.77 27.13 3.59 3.61 9.70 13.72 13.51 1.56 1.98 6.16 9.38 9.78 0.72 1.05 4.54 7.68 7.59 0.35 0.65 3.41 6.22 6.02 0.15 0.41 2.65 5.26 5.02 0.04 0.24 2.14 4.51 4.27 ‐0.08 0.07 1.72 3.99 3.71 ‐0.17 ‐0.02 1.35 3.57 3.33 ‐0.24 ‐0.10 0.99 3.12 2.95 ‐0.29 ‐0.17 0.70 2.73 2.57 ‐0.34 ‐0.22 0.47 2.35 2.31 ‐0.39 ‐0.27 0.31 1.97 2.10 ‐0.44 ‐0.31 0.16 1.64 1.87 ‐0.48 ‐0.35 0.02 1.28 1.59 ‐0.51 ‐0.40 ‐0.09 0.97 1.36 ‐0.53 ‐0.45 ‐0.20 0.65 1.10 ‐0.55 ‐0.48 ‐0.31 0.42 0.82 ‐0.58 ‐0.52 ‐0.41 0.27 0.42 ‐0.62 ‐0.57 ‐0.50 ‐0.02 0.11 0 0 0 0 0 Exc Prob  % 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Start  WL 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.39 15.00 15.00 0.00 Jan 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.89 14.80 13.87 0.00 Feb 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.49 13.99 12.54 0.00 Mar 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 13.27 13.87 11.51 0.00 Apr 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.18 0.00 Dec 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 15.00 12.39 9.64 3.64 0.00 APPENDIX B Fish Ladder As-Built Record Drawings Nova Scotia Transportation and Infrastructure Renewal December 09, 2015 LIST OF DRAWINGS: Transportation and Infrastructure Renewal C-001 FISL LADDER LOCATION PLAN C-101 FISH LADDER PLAN AND PROFILE C-102 FISH LADDER BAFFLE DETAILS Public Works Division Industrial Utilities Section PROJECT TITLE: MIDDLE RIVER FISH LADDER LOCATION GRANTON, PICTOU County PROJECT NUMBER: N/A TENDER NUMBER: N/A DATE: 09/12/2015 AS BUILT J.B. Yates Engineering Limited Consulting Engineers Record Drawing CONTACT: CONTACT: JAMIE YATES, P.Eng BARRY ARSENAULT, CET cell: (902)499 1956 cell: (902)478 8273 email: jyates@eastlink.ca email: barrya@eastlink.ca 1 2 3 4 GENERAL NOTES: 1.) N ALL ELEVATIONS ARE INDICATED IN FEET, DIMENSIONS ARE IN FEET AND Transportation and Infrastructure Renewal INCHES. PICTOU HARBOUR Public Works Division 106 2.) SLUICEWAY ELEVATIONS SHOWN ARE TO SITE DATUM BASED, TOP OF SLUICEWAY Industrial Utilities Section CONCRETE DECK ELEVATION 20.0 FEET. KEY PLAN DO NOT SCALE DRAWINGS, USE FIGURED DIMENSIONS ONLY. 4.) ALL MEASUREMENTS AND DIMENSIONS ARE BASED ON SITE SURVEY TO 3.) OU CT PI D CONDUCTED 14 SEPTEMBER, 2015 AND SUPPLEMENTAL MEASUREMENTS G TAKEN AT SITE ON 09 NOVEMBER, 2015. MANY MEASUREMENTS WERE TAKEN _ n to n ra UNDERWATER. m ro rc e b A 5.) AS CONSTRUCTED DIMENSIONS ARE BASED ON ORIGINAL CONSTRUCTION e i b (DRAWINGS DATED 1965), AND FISH LADDER IMPROVEMENTS AND EXIT 2 LOGO ALTERATIONS AS DIRECTED BY FISHERIES AND OCEANS CANADA (DFO) IN 1985 AND 1995, AND LOCALIZED REPAIRS CARRIED OUT IN 2015 AS PART OF MIDDLE RIVER SLUICEWAY REPAIRS. MIDDLE RIVER R oa d OF PICTOU Y HW 106 SITE LOCATION 1:10,000 C OAD SS R ACCE TREES N AS BUILT PICTOU HARBOUR TIDAL WATERS Record Drawing 0 2 1 5 GRAPHIC SCALE SHORE LINE O L F W 12/09/15 DATE B 1 AS BUILT MARK ISSUE STAMP FISH LADDER SLUICEWAY STRUCTURE SHORE LINE O L F MIDDLE RIVER HEAD POND W SCALE AS NOTED DRAWN BY: BJA CHECKED BY: JBY REVIEWED BY: SHORE LINE APPROVED BY: AS-BUILT CHECK DATE: DEC. 09 2015 PROJECT MIDDLE RIVER S S E C C A TREES SHORE LINE SLUICEWAY FISH LADDER D A O R PICTOU CO., GRANTON PROJECT NO.: A SHEET TITLE FISH LADDER LOCATION PLAN INTERNAL NO.: C-100 PLAN 1"= 50' SHEET 1 2 3 1 OF 3 4 TPW A1 REV OC13 2003 2 3 4 2" 1 1'-8 1 1'- 2" 3 1'-8 1'-9 1 3 4" MATCH KEY PLAN 3'-6" LOGO 11 3 8" 3'-3" 1'-7 1'-8 3'-4" (POOL #4 2" BAFFLE 8" 1 Public Works Division Industrial Utilities Section 1 2" 4" 3 1'-7 2" 1 2'-2 #4 #5 BAFFLE and Infrastructure Renewal FIXED METAL CHUTE 3'-3 2" 1 11 1 1'-8 4" 3 #9 DTIR DTIR #7 DTIR #6 #8 1'-7 9'-0" (POOL #5) Transportation 4" BAFFLE 4" BAFFLE 2'-1 1 #6A 2" 1 3'-3 1'-8" 2" 1 1'-0 1 2" 8'-11 FIXED METAL CHUTE DTIR #5 DTIR LINE "A" #6 #7 1 1'-7 3'-4" #4 DTIR 5.00' BAFFLE #1 2" 1 1'- (POOL #1) 1'-0"(TYP.) DTIR #12 DTIR #11 AS BUILT EL.5.92'± ORIFICE INVERT ORIFICE INVERT EL.6.04'± EL.6.04'± CREST EL.6.89' WEIR CREST WEIR CREST EL.5.76' AS BUILT MARK ISSUE METAL CHUTE (FIXED) STAMP CREST EL.4.81' 13'-9" 13'-0" (POOL #8) (POOL #7) DTIR #5 DTIR #6 DTIR #7 (POOL #9) DTIR #4 DATE 1 WEIR CREST 11'-6" (POOL #10) 12/09/15 EL.5.83' 8" ORIFICE OPENING 11'-5" DTIR #3 0.00' 11'-6" (POOL #11) DTIR #2 (POOL #12) DTIR #1 (POOL #13) 11'-3" GRAPHIC SCALE EL.5.93' (BLOCKED & SEALED 14 SEPT.) (14 SEPT.) 6'-9" MATCH EL.8.89' LINE "B" (FIXED) EL.7.16' EL.7.89' (FIXED) (14 SEPT.) METAL CHUTE T.O.C. EL.8.26' BAFFLE #6A CREST (NOT OPERATING) (RETRO-FIT) WEIR CREST (OPEN 14 SEPT.) (OPEN 14 SEPT.) METAL CHUTE EL.9.43' BAFFLE #6 ORIFICE INVERT CREST TOP EL.10.26'(FIXED) METAL CHUTE 2 1 5 EL.8.21' EL.11.30' 0 EXTENSION EL.10.21' T.O.C. CREST (PLATE REMOVED 18 SEPT.) 7'-1" ENTRANCE 10 FIXED METAL CHUTE T.O.METAL WALL BAFFLE #7 CREST METAL CHUTE EL.9.43' METAL CHUTE EL.4.0' 3" RAISED SILL 1 7'-10 2" > FLOW 3 4" 5'-10 1 2" 11 5'-7" 8'-5"± 1 2" 3 4" 1'-8 DTIR #10 DTIR #9 DTIR #8 3 1'-7 8" 7 8" CONC. U/N 1 2" 3'-3" 11" 1'-9 1 2" 5'-8 1 8" 1'-9 3 4" 1'-7 1'-9 1 2" 1'-8 2" 1 1'- FIXED METAL CHUTE 11 3 8" BAFFLE #2 BAFFLE #3 BAFFLE #4 1 8" 3'-3 1 1'-9 2" 3 1'-8 4" (POOL #2) 9'-512" Record Drawing EXTENSION EL.10.00' T.O.C. EL.9.93' (OPEN 14 SEPT.) (POOL #3) 8'-4" ‚"=1'-0" T.O.METAL WALL BAFFLE #8 EL.9.93' EXTENSION EL.11.43' EL.7.70'± BULKHEAD 8'-1012" (NOT OPERATING) T.O.METAL WALL EL.10.60' EL.12.14' EL.14.60' WEIR CREST EL.5.83'± MATCH ORIFICE GATE EL.9.26 REMOVABLE 1'-8 3'-4" DTIR #7 SEALED WITH PLATE T.O.C. CREST WEIR CREST ORIFICE INVERT LINE "A" 1 2" 11 1 2" 3 4" 1'-7 ORIFICE GATE (ONLY) WEIR CREST (OPEN 14 SEPT.) BAFFLE #5 BAFFLE #6 1 4" 2'-2 1 2" 1'-7 CHUTE AND INTEGRAL T.O.C. RANGE OPERATING NORMAL (POOL #6) FIXED METAL CHUTE FIXED METAL CHUTE ORIFICE BLOCKED AND ORIFICE INVERT ONE-PIECE (POOL #4) 3'-6" LIFTING YOKE FOR 10.00' FLOW 9'-0" WOOD B FIXED METAL CHUTE LIFTING YOKE FOR WEIR CREST EL.10.76' (POOL #5) LIFTING YOKE FOR CHUTE. (OPERATING) METAL CHUTE 15.00' (SEPT.9) 1 2" PLAN BAFFLE #10 FSL EL.15.00' EL.13.55' EL.15.49' T.O.C. CREST BAFFLE #11 BAFFLE #12 CHUTE 8'-1112" FIXED METAL CHUTE (OPERATING) METAL (POOL #6) 1'-8 3 4" 1'-8" ORIFICE GATE 8'-1112" FIXED METAL CHUTE 2'-1 BAFFLE #6A 3'-3 CHUTE AND INTEGRAL (OPERATING) EL.14.89' LIFTING YOKE FOR AND ORIFICE GATE BAFFLE #13 (OPERATING) FIXED METAL CHUTE FOR MOVABLE CHUTE T.O.C. AND ORIFICE GATE EL. 9.6' 1 4" 13'-0" 1 2" TWIN ACTUATORS FOR MOVABLE CHUTE DTIR #6 TWIN ACTUATORS HEAD POND 4" 1'-8" 1'-7" 1'-0" #3 DTIR 13'-9" 1 1'-7 4" DTIR #5 DTIR #4 FIXED METAL CHUTE N.(MAX.)W.L. ‚"=1'-0" (POOL #7) 1'-0 1'-0" 3'-4" 1'-7" 1'-8" 1'-8" 3'-4" 1'-0" (POOL #8) PLAN 27'-3" 1 2" 11'-6" BAFFLE #9 BAFFLE #7 BAFFLE #8 BAFFLE #9 C 13'-0" FIXED METAL CHUTE (LIMITS APPROXIMATE) T.O.C. EL.20.0' METAL CHUTE 13'-9" 8'-11 ROOF OVER FISH LADDER REMOVABLE BULKHEAD (POOL #9) (POOL #7) FIXED METAL CHUTE BAFFLE #13 IS A ONE-PIECE 11'-5" 27'-3" BAFFLE 1'-0" (POOL #8) 3'-4" 1'-8" 4" 3 3'-4" 2" METAL CHUTE METAL CHUTE #8 METAL CHUTE 1 1'-6 #2 DTIR NOTE: #1 METAL CHUTE DTIR WEIR AND MOVEABLE 11'-6" BAFFLE BAFFLE (POOL #9) 1'-6 4" 1 1'-7 5'-2 ORIFICE ROOF OVER FISH LADDER (LIMITS APPROXIMATE) 11'-5" 1'-0" 2" 1 1'-7" ORIFICE WEIR/ 6" 6" WING WALL WEIR/ 1'-8" 4'-6" ORIFICE CONC. 1'-8" WEIR #9 #10 #11 METAL CHUTE (POOL #10) 1'-8" 2" (POOL #11) 1 1'-7 1'-6" 4'-11" ORIFICE EXIT BULKHEAD 6'-9"± 11'-6" BAFFLE CHUTE 11'-3" BAFFLE METAL (POOL #12) 2'-3" (POOL #13) WING WALL FLOW 6'-9" BAFFLE BAFFLE 7'-1" CONC. D #12 #13 ROOF OVER FISH LADDER (LIMITS APPROXIMATE) 4" 1 8'-1112" (POOL #6) 15.00' SCALE 8'-1112"AS NOTED DRAWN BY: BJA CHECKED BY: JBY REVIEWED BY: PROFILE APPROVED BY: ‚"=1'-0" 6 4.81 5.83 N/A (POOL #7) SETPEMBER 14 AND NOVEMBER 09 2015. 6.89 N/A 7 5.93 7.89 #7 N/A 8 5.76 9.43 5.76 9 8.26 11.30 6.04 10 9.26 10.26 6.04 11 9.93 14.60 5.92 12 9.93 15.49 5.83 13 10.76 10.76 7.70 EL.2.91' EL.3.56' 13'-0" EL.2.71' 8'-1112" (POOL #6) WEIR CREST EL.1.81' 8'-1112" (POOL #5) 5.00' (POOL #4) PROJECT NO.: (FIXED) EL.1.78' CREST WEIR CREST EL.0.71' SHEET TITLE FISH LADDER PLAN AND PROFILE WEIR CREST ‚"=1'-0" 3 0.00' EL.-1.33' 8'-1012" (POOL #3) PICTOU CO., GRANTON METAL CHUTE 9'-0" APPROX. 2 SLUICEWAY EL.0.75' PROFILE 1 CREST WEIR CREST EL.3.11' COLLECTED BY FIELD MEASUREMENTS T.O.C. N/A (FIXED) BAFFLE #1 4.86 METAL CHUTE 8'-4" (POOL #2) INTERNAL NO.: 9'-512" #12 3.56 PROJECT FISH LADDER (POOL #1) DTIR 5 WEIR CREST EL.3.18' INFORMATION ILLUSTRATED IS AS T.O.C. N/A CREST BAFFLE #2 3.85 EL.3.85' (FIXED) #11 EL.4.81' 2.71 - CREST METAL CHUTE DTIR NOTE: 4 6A EL.4.86' WEIR CREST EL.4.17' N/A T.O.C. 2.91 (FIXED) BAFFLE #3 1.81 METAL CHUTE #10 3 DEC. 08 2015 MIDDLE RIVER NORMAL OPERATING RANGE DTIR N/A EL.5.15' 1.78 CREST T.O.C. 0.75 (FIXED) BAFFLE #4 2 EL.5.83' METAL CHUTE #9 N/A 10.00' DTIR 0.17 EL.6.16' -1.33 CREST T.O.C. 1 EL.6.89' DTIR A INVERT (FIXED) BAFFLE #5 (ORIGINAL) CREST #8 ORFICE DTIR METAL METAL CHUTE MATCH BAFFLE # CONCRETE DATE: LINE "B" (FIXED) EL.7.16' SUMMARY OF CREST ELEVATIONS (SEPT.14, 2015) T.O.C. METAL CHUTE BAFFLE #6 AS-BUILT CHECK -5.00' -5.00' C-101 SHEET 2 OF 3 4 TPW A1 REV OC13 2003 1 2 3 4 METAL CHUTE CHUTE METAL TOP OF DECK AND 1'-6" BULKHEAD 6" 4'-9" Transportation and Infrastructure Renewal Public Works Division NOTE: Industrial Utilities Section METAL CHUTE METAL CHUTE BAFFLE No.13 IS ONE PIECE AND KEY PLAN IS REMOVABLE. 1'-8" 1134" OPEN SEPT. 14) 1'-8" 1 2" 11 METAL CHUTE 2'-0 SEPT. 14) 1 2" 1'-2" 10 2'-5 ORIFICE GATE 1 2" 5'-10 3'-8" 8" BLOCKED 1 2" 7'-0" GATE ORIFICE 2'-0" WALL EXTENSION ORIFICE 2'-0 1 2" 1'-11" (OPEN 100% LOGO 3'-3" CHUTE AND 2'-1" METAL ORIFICE ORIFICE 1 2" 1 2" 1'-0 1'-10 1 2" 1 2" 1'-0 2'-012" 8'-4 1 2" 9'-7 1'-2 1'-10" 1 2" 11'-0 GATE 1'-8" INTEGRAL 1 4" 2'-10 CHUTE AND 1 2" 2'-012" 10" 1 2" 3'-7 INTEGRAL 1'-0" 1'-0" 3'-3" ORIFICE ORIFICE 1'-8" 1 2" 3'-4" 1 2" 1 2" 1'-0" 4'-11 12'-3 16'-6" 1 2" 1'-8" 2'-0" C METAL CHUTE METAL CHUTE CHUTE METAL 1'-3" 5'-212" 1 1 4" GATE (100% 7 D METAL ORIFICE 4'-11" 9'-3" 2'-3" ORIFICE OPENING SEPT.14 BAFFLE #13 & EXIT BULKHEAD BAFFLE #12 BAFFLE #11 BAFFLE #10 …"=1'-0" …"=1'-0" …"=1'-0" …"=1'-0" ORIFICE ORIFICE (OPEN 100% (OPEN 100% SEPT. 14) BAFFLE #9 SEPT. 14) BAFFLE #8 …"=1'-0" …"=1'-0" FIXED METAL CHUTE FIXED METAL CHUTE FIXED METAL CHUTE 3'-318" ORIFICE DIMENSIONS BAFFLE No.9 ALTERED SUBSEQUENT TO NOV.09/15 SUPPLEMENTAL SURVEY. ORIFICE PLATE REINSTALLED 3'-3" 1'-3 SUBSEQUENT TO SEPT. 18 REMOVAL. 2. AS BUILT ORIFICE DIMENSIONS BAFFLE No.10 ADJUSTED SUBSEQUENT TO NOV. 09/15 SUPPLEMENTAL SURVEY. 1 4" 1'-3 1'-4" 3. 1'-7" 1 4" 4'-1 BAFFLE 1'-9" 1. 1138" 1'-012" 1 2" 3'-434" 2'-0" 5'-7" 2'-3 1 2" 1 2" 2'-4" 2'-0" TIMBER 1'-812" FIXED METAL CHUTE 1112" 2'-3" 4'-8 1'-734" 4'-1" 2'-212" SUPPLEMENTAL INFORMATION 09 NOV. 2015 FIXED METAL CHUTE 3 4" 1'-814" 2'-7 1'-8" 1 2" 1'-012" 4'-2 EXTENSION 3'-312" 1 2'-4 4" WALL ORIFICE DIMENSIONS BAFFLE No.11 ADJUSTED SUBSEQUENT TO Record Drawing NOV. 09/15 SUPPLEMENTAL SURVEY. 4. ORIFICE DIMENSIONS BAFFLE No.12 ADJUSTED SUBSEQUENT TO NOV. 09/15 SUPPLEMENTAL SURVEY. 5. 0 2 1 5 GRAPHIC SCALE BULKHEAD No.13 IS ONE-PIECE METAL CONSTRUCTION AND IS RESTING ON A 3”HIGH CONCRETE, METAL OR WOOD SILL BAFFLE #7 BAFFLE #6A BAFFLE #6 BAFFLE #5 BAFFLE #4 …"=1'-0" …"=1'-0" …"=1'-0" …"=1'-0" …"=1'-0" EXTENDING ACROSS THE FISH LADDER FLOOR AT THE TOP END (OUTLET) OF THE FISH LADDER, SUBSEQUENT TO NOV.09/15 SUPPLEMENTAL SURVEY. DATE FIXED METAL CHUTE 11" 5'-10" 5'-7" 2'-5" 1 2" AS BUILT MARK ISSUE 2'-6" 1'-8" A 4'-5 4'-2 1 STAMP 1034" FIXED METAL CHUTE 4'-11 5 8" 2'-3" 1 2" 2'-4 4'-1" 1'-714" 1'-5" 5'-712" FIXED METAL CHUTE 1'-012" VARIES 1'-912" 1 4" 1'-912" 2'-5" B 12/09/15 -- 1112" SCALE AS NOTED DRAWN BY: BJA CHECKED BY: JBY REVIEWED BY: APPROVED BY: AS-BUILT CHECK METAL CHUTE DETAIL - PLAN BAFFLE #3 BAFFLE #2 BAFFLE #1 …"=1'-0" …"=1'-0" …"=1'-0" DATE: DEC. 09 2015 ƒ"=1'-0" PROJECT MIDDLE RIVER SLUICEWAY NOTE: UPSTREAM (U/S) VIEW. ALL DIMENSIONS ARE FIELD PICTOU CO., GRANTON PROJECT NO.: 10" MEASURE ±. SEPT.14 AND 2 NOV.09, 2015 1 SHEET TITLE FISH LADDER BAFFLE DETAILS 10"± A FISH LADDER VARIES BAFFLE DETAILS ARE BASED ON A -- SECTION ƒ"=1'-0" INTERNAL NO.: C-102 SHEET 1 2 3 3 OF 3 4 TPW A1 REV OC13 2003