AGREEMENT BETWEEN THE GOVERNMENT OF CANADA AND THE GOVEEUJMENT OF THE UNITED STATES OF FLMERICA FOR WATER SUPPLY AND FLOOD CONTROL IN THE SOURIS RIVER BASIN
The Government of Canada and the Government of the Unite2 States of America, hereinafter referredto as !!the ?arties;ll
NOTING that significant benefits will accrueto the Parties by construction, operation, and maintenanceof reservoir projects in the Souris River Basin in Canada for the purposes of flood control in the United Statesof America and for water supply in Canada ; FURTHER NOTING that the Government of the United States of America and the Government of Canada are parties to the Treaty between the Government of the United States of America and the Government of the United Kingdom Concerning Boundary Waters and Questions Arising Alongthe Boundary between the UnitedStates of America and Canada, signed on January 11, 1909, hereinafter referred to as the ''Boundary Waters Treaty'!, and to the Conventicr? Between the Government of the United States of America and the Government of the United Kingdomfor the Protection of Migratory Birds in the United States of America and Canada, signedP.ugust on 16, 1916, hereinafterreferred to as the ItMigratoryBirds Conventiont1, anddesire in connection with the development contemplatedin this Agreement to fulfill their rights and obligations underthese instruments, and any agreementsor orders which implement them; INTENDING that the Souris River Basinbe developed for floc? control benefits in the United States of America .andsupply water benefits in Canadain a manner thatis consistent with the Boundary Waters Treaty and the Migratory Birds Convention;
NOW, THEREFOW, hereby agree to the following plan fcr development of the Souris RiverBasin:
t -2-
ARTICLZ I
1. In this Agreement, the term: a. "Alameda Dam" means the dam which will be constructedMoose on Mountain Creek in the Province of Saskatchewan approxinately four kilometers upstream from its confluence with the Souris River; b. "Boundary DamJ1means an existing dam located on Long Creek approximately seven kilometers ina southwesterly directicn from the City of Estevan in the Province of Saskatchewan; c. "Boundary Diversion Channel" means a channel that will,,be constructed in the Province of Saskatchewan with a maxinm capacity of 60 cubic meters per second(2 , 100 cubic feet per second) to allow the conveyance of water from the Boundary reservoir to the impoundment behind Rafferty Dam; d. 11~0undary meanstheimpoundment of water behind Boundary Dam; e. "construction costsf1 means expenditures made by Canada far construction of Rafferty Dam and Alameda Dam and rese-rvoirs. Such costs shall include expenditures for engineering,design, construction, land acquisition, and operation and meintenance prior to completion of construction;
f. "flood control storaget1 means the volume below the maximum allowable water level in a reservoir to store flood event runoff ;
g. "improvement" means a dam, reservoir or related facility tc; which this Agreement applies; h. "Lake Darling Dam" means an existing structure whichis part of the Upper Souris National Wildlife Refuge locatedon the Souris River approximately 25 kilometers in a northwesterly direction from the cityof Minot in the State of North Dakota; i. "maintenance curtailmentI1 meansan interruption or curtailment of operations under the Operating Plan which is necessaryfcr purposes of repairs, replacements, installation of equipment, performance of other maintenance work,. investigations, cr inspections; -3- "Operating Plan" means the plan of operation which is attached to this Agreement as AnnexA and which is an integral partof this Agreement, for certain dams, reservoirs,.and related works on the Souris River; "Rafferty Dam" means the dam which is under constructionat a location onthe Souris River approximately six kilometers upstream in a northwesterly direction from ofthe Estevan City in the Province of Saskatchewan;
1. "Reservoir Revlation Manual" means a document whichis used as a guide in the day-to-day operationof a reservoirby the agency responsible for the operationof the reservoir. The manual shall contain a description of the project and its history,and discuss watershed characteristics, data collection and communication networks, hydrologic forecasts, the water control plan, and water control management; m. "substantially destroyedt1 means whenthe cost of repairs or rehabilitation to an improvement to rectify damages ta that improvement would exceed50 percent of the replacement value of the improvement at the time the damage is sustained; n.. "uncontrollable forcell means any force or cause beyond the control of the party affected, including, but not limitedto, war,riot, civil disturbance, sabotage, earthcake, catastrophic storm event, and restraint by court order, which by exercise of due care and foresight, such partycould not reasonably have been expected to avoid;
0. Ituseful life" means the time renaining until an improvenent is permanently retired from service because it no longer effectively serves its intended purpose,as defined in this Agreementand the OperatingPlan, notwithstanding good maintenance, or because it is substantially destroyed by uncontrollable force; "water quality monitoringtt means the collection, andanalysis interpretation of water quality conditions, whether obtained through systematic surveysor special studies; "water quality objectiveIt means a concentration level,other measure, or narrative goal whichis intended to support the designated uses of water aat specific site; and "water supply in Canada" means theuse of reservoir storage in Canada for the puqoses of: cooling water for electric generating plants, irrigation, domestic use, municipzl ar,d industrial use, agricultural use, recreztion, conse,Tvzzicn, flood protection in Canada, or such other uses as the Government of Canada shall designate. -4-
2. Both the United States of America system of measurement and the Systeme international (metric system) are equallywhe, re valid used in this Agreement. The conversion table in the Operating Plan shall be usedto convert values in one measurement systemvalues to in the other measurement system. 3. The terms defined in this Agreement shall have the same meaning when used inthe OperatingPlan.
ARTICLE I1 1. The Government of Canadashall expeditiously provide the Government of the United States of America witha minimum of 466,000 cubic decameters (377,800 acre-feet) of floodstorage by: a. Completing construction of Rafferty Dam and includingin that improvement. a minimum of 327,100 cubic decameters (265,200 acre-feet) of flood control storage; and b. Constructing Alameda Dam and including in that improvement a minimum of 138,900 cubic decameters (112,600 acre-feet) of flood control storage. 2. The Government of Canada shall design and construct Raf ferty Dam and Alameda Dam in accordance with accepted engineering standards. Before the Government of the United Statesof America shall make anypayment pursuant to Article IV of this Agreement, the Government of Canada shall ensure, to the satisfaction of the Government of the United States of America, that Rafferty andDam Alameda Dam will be designed to have a 100-year projectlife, and will be capable of operation in accordance with the Operating Plan.
ARTICLE I11 1. The Government of Canada shall operate and maintain Rafferty Dan and Alameda Dam at no cost to the Governmentof the United States of America, except for those costs referred to in ArticleIV of the Agreement, in accordance with the Operating Plan or in accordance with any subsequent mutually agreed upon change to the Operating Plan for the tern of this Agreement. Operation and maintenance of Rafferty Dam and Alameda accordance.withDam in the Operating Plan shall commence immediately upon completion of cons truction of each dam.each construction of t. -5-
2. Tke Government of Canada shall operate and maintain the Boundary Reservoir at no cost to the Government of the United States of America in accordance withthe Operating Plan or in accordance with any subsequent mutually agreed upon change to the Operating Plan for the remainder of the useful lifeof the Boundary Resemoir. Operation and maintenanceof the Boundary Reservoir in accordance with the Operating Plan shall cmunence immediately upon entry into force of this Agreement.
3. The Government of Canada shall operate the Boundary Diversicn Channel and any future water resources development or flood control projects constructed after entry into forceof this Agreement for the term of this Agreement at no cost to the Governmentof the - United States of America in a manner which will not adversely affect the stream flow in the Souris River so as to reduce the flood control benefits providedby the RaffertyDarn and Alameda Dan and the Operating Plan;
4. The Government of the United States of America shall operate 2nd maintain the improvements located. in the United States for the remainder of their useful life at no cost to the Government of Canada and in accordance with the operatingor anyPlan subsequent mutually agreed upon changeto the Operating Plan. 5. The Parties shall notify one anotherof any maintenance curtailment that is proposed at any project addressedin the OperatingPlan an& the probable durationthereof, and take suchaction as is appropriate to minimize the effectsof such maintenance curtailments on operations under the Operating Plan, to include providing one year's notice of such maintenance curtailments when possible.
ARTICLE IV 1. The Government of the United States of America shall pay the Government of Canada $26.7 million (United States currency, based on October 1985 price levels) for the flood control storage provided at RaffertyDarn.
2. The Government of the United States of America shall pay the Government of Canada an additional $14.4 million (United States currency, based on October 1985 price levels) for the flood control storage provided at Alameda Dam. t -6- 3. The amount of the contributions specified in ?aragraphs 1 and 2 were determined by an allocation of construction costs based on the proportionate use of the Rafferty Dam and Alamedafor flood Dam control inthe United States of America and water supply in Canada. Such contributions shall be subject to adjustment for cost changes by the United States of America pursuant to Section 902(2) of Public Law 99-662 and shall fluctuate to reflect changes in the rate of exchange for currency between the United States of America and Canada that occurred between October1985 and the time such contributions are made.
4. At the 'end of each calendar month,the Government of Canada shall issue a progress billingto the Government of the United Statesof America for its shareof project construction costs, which shall be determined by an allocationof joint construction coststo flood control and water supply purposes. The Government of the United States of America shall review such billing and, ifdisputed, not make payment of the amount billed within thirtyof receipt days of the bill for the amountdue. If the Governmentof the United States of America disputes any billing or portion of such billing, it shall specify its reasons for disputing the billing andpay any undisputed amount. Disputed billings or disguted portions of billings shall be discussed by the Parties. Disputes concerning amounts billed that are not resolved by discussionbe settledmay in accordance with Article'XII. 5. Recordsshall beestablished and maintzined to pernit identification of the exact nature and amounts of costs of the Raf f erty Dam and Alameda Dam. The records established and maintained pursuantto this paragraph shall be subjectto audit at the request of the Government of the United Statesof America zt any reasonable time during the construction of the dams and for fiveyears thereafter, following reasonable notice to the Government of Canada.
6. The Governmentof Canada shall furnish quarterly status reports to the Government of the United Statesof America on the progressof construction on the Rafferty and Dam Alameda Dam,the total amount of funds expended on the dams at the time of thereport, and the anticipated costs to be billed to the United States for the remainder of the United States of America Government fiscalyear, which ends on September30, and for each following UnitedStates of America Government fiscal year.
ARTICLE V
1. The Parties shall cooperate and consult on the matters addressed in this Agreernent. The parties shall exchange suchinfomation as is appropriate to ensure timely and beneficial fulfillment cf obliqations under this Agreement. -7-
2. The Parties shall prepare the Reservoir Regulation Manuals required by the Operating Plan. In preparing such Manuals, the Parties shall consult with interested states and provinces.
3. The Parties shall jointly review the Operating Plan at five-year intervals, or as mutually agreed, in an effort to maximize the provision of flood control and water supply benefits thatcan be provided consistent with the termsof this Agreement. The Parties shall cooperate and consult, as necessary, with interestedstates, provinces, and agencies on the review of the Operating Plan and recommended changes in the Operating Plan.
4. Subject to the consent of the Government of Canada, officials of the Government of the United Statesof America may enter on lands in Saskatchewan acquired for construction of Rafferty, Alameda, and Boundary Damsfor the purpose of inspectionto ensure that such improvements are being constructed, operated, and maintained in accordance withthe terms of this Agreement. 5. The Parties shall consult with interested states and provinces upcn request, as appropriate, andso far as is practicable, concerning the supply of water throughout the SourisRiver Basin.
ARTICLE VI
_.1 The Parties shall ensure that all activities pursued under the terms of this Agreement are consistent with applicable provisi.ons of the Boundary Waters Treaty, particularly thoseof Article IV, paragraph two.
2. The Parties shall establish a Joint Water Quality Monitoring Program ("the Program") in the relevant portions of the Souris River Basin.
3. The Parties shall establish, within six months of the entry into force of this Agreement, a Bilateral Water Quality Monitoring Group ("the Group1'). The Group shall be composedof six members, three appointed by each Party, and be co-chaired by a Canadian and a United States of America member. Each Party may also identify advisors to the Group to assist its respective members.
9. The initial United States of America members of the Group shall include a representztive of eachof the United States Environmentel Protection Agency, the North Dakota Department of Health ana Consolidated Laboratories, and the United States GeologicalSurvey. A representative of the United States Fish and WildlifeService, the United States Department of the A"my, and the North Dakcte State Engineer shall serveas the initial advisors to the Unitsi States of America rneinbers of the Group. -8-
5. The initialCanadian members of the Groupshall include 2 representative of eachof the Government of Canada, Governmen: the of Saskatchewan, and the Governmentof Manitoba.
6. The Group shall: a. develop recommendations for the Parties on the Programon and water quality objectives; b. on a regular basis, exchange data providedthe byProgram;
C. collate, interpret, and analyze the data provided by the Program; d. review the Program and the water quality objectives at least every five years and recommendthe Parties,to as appropriate, any modifications to improve the, Program and the water quality objectives ; and e. prepare an annual report to be submitted to the Parties containing: i. a summaryof the principal activitiesof the Group during the year; ii. a summary of the principal activities affecting water quality in the Souris River Basin duringthe year; I iii. a summaryof the collated, interpretez, and analyzeddatl provided by the Program: iv . a summary of the water qualityof the Souris River at the two locations at which it crossesthe 1nternationz.l Boundary between Canada and the United States;
V. a section summarizing any definitive changes in the monitored parameters and the possible causes of such changes ; vi. a section discussing whetherthe water quality objectives. asestablished pursuant to Paragraph 7 have been attained; vii. a section summarizing other significant water quality changes and the possible causesof such changes;and viii. recommendations on new water quality objectives or en how existing water quality objectives can be met, including suggestions on water quality as it relatest~ water quantity during periods lowof flow, in the event that the annual report indicates thatthe water 5uality objectiveshave not been attained as a result of activities pursued under this Agreenent. -9-
I. The Parties shall, by April I, 1991, establish water quality objectives for the Souris River at the Saskatchewan/NorthDakota boundary and at the North Dakota/Manitoba boundary.
8. The Parties shall make reasonable efforts, consistent with then existing legal authorities, to implement the recommendations cf the Group and, where reasonably practicable, to improve water quality in the Souris River Basin. 9. If the annual reportof the Group indicates that the water quality objectives are not being attained, the Parties shall cmmence consultations to determine how thewater quality objectives canbe met, revised or otherwise addressed. Such consultations shall includeparticipation by interested states, provinces, and agencies.
ARTICLE VI1
The Parties agree that paragraph 1 of the 1959 interim Measures, which were approved by the Government of the United States of America and the Governmentof Canada, shallbe nodified as shown in Annex B attached hereto.
ARTICLE VI11
1. Should operation of any improvement result in flood danages in either the United States of America or Canada in excess of the flood damages thatwould have occurred hadthe improvement not been in operation, the Parties shall, the upon request of either Party, commence consultationson how such flood damagescan be avoided in the future and what mitigation and compensatory measures nay be appropriate, including possible changes to the Operating Plan. Such consultations shall include participation by interested states, provinces and agencies.
2. Notwithstanding Article Xi, paragraph 2, nothing in this Article shall preclude eitherParty from asserting any rights it nay have against the other Party for flood damages resulting from the actions of the other Party.
ARTICLE IX All obligations of the Government of the United St~tescf Americz to be carried out under the ternsof this Agreementshall De subject to the laws and regulations of the United States of America. All obligations of the Governmentof Cznada to be czrrie? cut under theterms of this Agreement shall be subject to laws the and regulations of Canada. - 10 - ARTICLZ X
1. The Governmentof Canada designates the Government of Saskatchewan as the Canadian entity respons-ible for the construction, operation, and maintenance theof improvements mentioned thisin Agreement and located in Canada. Such entity shall .issue the progress billings and receive the payments referred in to Article IV. 2. The Government of the 'United States of America designates the Department of the Army as the entity responsible for receiving billings and making the payments for flood control storage referred to in Article IV and for operating the improvements mentione'din this Agreement and located in the United States of America in accordance with the Operating Plan during periodsof.flood. The Governmentof the United States of America designates the Department of the Interior as the entity responsible for operating the improvements mentioned in this Agreement and located in the United States of America in accordance with the Operating Plan during non-flood periods.
ARTICLE XI
1. TheParties shall be liable to each other and, shallmake appropriate compensation to each other with respect to anyact, failure to act, omission or delay amountinq to a breachof this Agreement. For the purposes of this Agreeient, any act, failure to act, omission or delay occurring by reason of uncontrollable force shall not constitute a breach of this Agreement.
2. The Parties do not intend to create in this Agreement privateany right of action. Except as provided by Paragraph1 of the Article, neither Party shall be liable to the other orto any person in respect of any injury, damage, loss 'or occurring in the territory of the other caused by an act, failure toact, omission or delay under this Agreement whether the injury, damage, loss or results from negligence or otherwise.
3. Neither Party shall have any obligation under this Agreement to rebuild or further operate or maintain any improvement to be constructedunder this Agreement that is destroyed by uncontrollable force.
4. Neither Party shall have any obligation under this Agreement to take any act to extend the lifeof any improvement mentioned in this $.greenlent beyond. its norm21 useful life. - 11 - ARTICLE XI1
1. The Parties shall seek to resolve any dispute concerning the interpretation'orapplication ofthis Agreement through consultationsundertaken in good faith. As part of this, consultation process, the Parties may refer any dispute concerning the interpretation or application of this Agreement to the International Joint Commission for advice and recommendationsif mutually agreed. In making such a referral, the Parties shall request thatthe International Joint Commission provideits advice and recommqndations within90 days of the referral.
2. Any dispute concerning the interpretationor application of.this * Agreement which cannotbe resolved through good faith consultations shall, uponthe request of either Party, be referredto a neutral tribunal for review and examination and issuance of advice and recommendations.The tribunal shall consist of two members appointed by the Government of Canada, two members appointedby the Government of the United States of America, and a member jointly appointed by the Parties, who shallbe chairman of the tribunal.
3. The Parties shall give prompt and sympathetic consider.ationto the advice and recommendations of the International.Joint Commission and the tribunal.
4. The emenses of the International Joint Commissionthe andtribunal shall be shared equally by the Parties.
5. These procedures may be supplemented or modified by mutual agreement of the Parties.
ARTICLE XI11
I. This Agreement shall enter into force upon signature. 2. This Agreement maybe amended by mutual agreementof the Parties. 3. This Agreement shall remain in force for a periodof one .hunc!red years or until the Parties agree that the useful life of the Rafferty and Alameda Damshas ended, whicheveris first to occur. - 12 -
4. If either Party fails to receive appropriations or other revenues in amounts sufficient to meet anticipated 'obligations under this Agreement, that Party shallso notify the other Party. Ninety calendar days after providing such notice, eithermay Party elect to terminate this Agreementor to defer future performance, underthis Agreement. Termination or deferral of future performance shall not affect existing obligationsof the Parties under this Agreementor relieve the Partiesof liability for any obligation previously incurred. In the event that either Party terminates or suspends future performance under this Agreement pursuant to this provision, the Governmentof the United Statesof America. and the Government of Canada shall make appropriate adjustments in the Operating to Plan maximize the flood. control and water supply benefits that can be obtained in the United States of America and Canada from .the construction accomplished at the time of termination or suspension.
IN WITNESS WHEREOF the undersigned, duly authorized by their respective Government, have signed this Agreement.
DONE at .~.;~~~l~h,~,.'At in duplicate,this 24 //i day of - ?,X3. , 1989 in the English and French languages, each text &g &g equally authentic. For Canada:For UnitedtheFor StatesAmerica: of ANNEX A
OPERATING PLAN OPERATING PLAN FOR RAFFERTY, AWEDA, BOUNDARY, AND LAKE DARLING RESZXVOIFS
TABLE OF CONTENTS
Item ?a5e
"" "" INTRODUCTION A- 1
1.0 TERMINOLOGY A-4
1.1 Glossary of Terms and Definitions A-4 1.2 Abbreviations andSymbols A-7
1.3 Conversion Factors A-8
2.0 HYDROMETEOROLOGICAL DATANETWORX A-8
2.1 General A-8 2.2 Station Networks A-9 2.3 Additional Stations A-9
2.4 Data Collection,.Estimating,and Coordination A-9
3.0 CONTROL ?OINTS A-16
3.1 Raf ferty Dam A-16
3.2 Boundary Dam A-19 3.3 Alameda Dam A" 2 0
3.: Lake Darling Dam A-2 1 3.5 Souris River near Sherwood Crossing A-21 3.5 Souris River above Minot A- 22
3.7 Souris Rivernear Westhope Crossing A- 22 Eoundary Diversion Channel A-22
7.c Other Considerations A-22 A- i ..
4.0 PROJECT OPERATION A-23
4.1 Ob jectives and Procedures A-23
4.2 Consistency with Interim Measures A-24
4.3 Flood Operation A-2 6
4.3.1 Drawdown Prior to Spring Runoff A-27
4.3.2 Spring Runoff A-29
4.3.3 Drawdown After Spring Runoff A-30
4.3.4 Significant Spring and Summer Rainfall x-3 1
4.3.5 Flood System Operation Steps A-3 1
4.4 Nonflood Operation A-34
4.4.1 Nonflood Project Operation Steps A-34
4.5 Operating Provisions During Construction and Filling A-35
5.0 REPORTS A-35
6.0 LIAISON A-3 6
7.0 DATA AND COMMUNICATION A-3 6
A-ii List of Tables
""""""" Number
""" 2.1 Hydrometric Station Network for Souris Basin in Saskatchewan A-11 2:2 Hydrometric Station Network for Souris Basinin North Dakota A-13 2.3 Meteorological Station Network for Souris Basin in Saskatchewan A-14 2.4 Meteorological Station Network for Souris Basin in North Dakota A-16 3.1 Data For Reservoirs A-17 3.2 Summary of Rafferty Elevation-Area-Capacity Data A-18 3.3 Summary of Boundary Elevation-Area-Capacity Data A-19 3.4 Summary of Alameda Elevation-Area-Capacity Data A-20 3.5 Summary of Lake Darling Elevation-Area-Capacity DataA-21 3.6 Approximate Bankfull Channel Capacity A-2 3 List"""""""_ of Figures Number
""" A-1 Souris Basin Map A- 3 A-2 Weather and River Gaging Stations A-10
List of Plates
""""""" Number
""" A- 1 Target Drawdown Level- Rafferty Reservoir A- 2 Target Drawdown Level- Boundary Reservoir A-3 Target Drawdown Level- Alameda Reservoir A-4 Target Drawdown Level- Lake Darling Reservoir A-5 Peak Target Flow at Sherwood A-6 Peak Target Flow at Minot A-7 Rafferty Area-Capacity Curve A-8 Alameda Area-Capacity Curve A-9 Lake Darling Area-Capacity Curve
A-iii INTRODUCTION purpose: This Operating Plan was developed pursuant to the Agreement between the Government of the United stst25 of America and the Government of Canada for water supply and flood control in the Souris River “3sin (hereinafter ref erred asto “the subjectAgreemerit. 11)
It provides for operationof the Souris Basin Project and sets forth a framework for completing project specific Reservoir Regulation Manuals. scope: The Operating Plan is limited to the operation cf t?,e Souris Basin Project in the Souris River Basin in Saskatchewan,Canada, and North Dakota, United States of America, in accordance with the subject Agreement. Ob jectives : The objectives of the OperatingPlan are:
- To provide 1-percent (100-yezr) flood protection 2: Minot, North Dakota; - To provide flood protection to urban and rcral areas downstream from Raf ferty Dam, Alameda D~T., and Lake Darling Dam:
Document :
A- 1 Forecasting: The abilityto provide increased flood protscz' (including the ability to limit flows at Minot 5,000 cfs for floodsup to the 1-percent ever,-, while optimizing the potential supply of waterin the Souris River Basin is dependent upon the accuracy cf theestimates of runoff provided to the agencies responsible ' forthe daily operation of 23ch improvement (.Section 4.3.1). The runoff estimates usedin this OperatingPlan are: runoffvolune, 30-day: runoff volume, 90-day; Sherwood Crossing uncontrolled runoff volume; and runoff volume, 90- percent,90-day. Data used to develop the runcfZ estimates are gatheredby Environment Canada and SaskatchewanWater Corporation in Canada and the National Weather Service in the United States. - Z.s notedin Section 2.4, newestimating techniques will be developed. If the new estimating techniques cannot be developed for the four items listed above, (withsufficient accuracy meetto the Ccal objectives of flood control and wat.er conservation), then the Operating Plan will be modified to use existing methodsof estimating runoff.
A-2 .-
K 3 0 v, 1.0 TERMINOLOGY
1.1 Glossary of Te,rns and Definitions Alameda Dam The dam which will be constructed on Moos2 Mountain-CreektheProvince in Cf Saskatchewanapproximately four kilometres upstream from its confluence with theSouris River. Authority The Souris Basin Development Authority. Bankfull capacity The maximum flow that a given watercourse can conveyin aspecified reach without the water level rising above the level of eit-her bank. Boundary Dam An existing damlocated on Long Creek approximately sevenkilometres in a southwesterly direction from the City of Estevan in theProvince of Saskatchewan. Boundary Diversion A channel that willbe constructed in the Channel Provinceof Saskatchewan with a maximun capacity of.60 m3/s (2,100 cfs) to allow the conveyanceofwater from the Bound Reservoir to the impoundment behind Raffe- Dam. Canadian reservoirs A collectiveterm for RaffertyReservoir, Boundary Reservoir,and Alameda Reservoir. Control point A streamflow gaging station or dam which is usedto develop operating decisions fcr
RaffertyReservoir, Alameda Reservcir, BoundaryReservoir, andLakeDarling Rese,rvoir.
Controlled volume Thevolume runoffof that Can be controlledusingby available floc6 control storage. Drawdown Thephysical act oflowering the pccl level of. areservoir through controlle-6 releases.
Estimate A value based on the bestjudginent cf qualifiedpersonnel using ell avzilzble data.
A-4 05 w
her=at, -4 al m
Y 0 Ll E 0 m+J -4 c w m ac c, 1 4
060 a f-lax
ri al 3 ! Qt a il h 2 4 a a a h v1 3 4J al v) k v) a, Id ri w al ri w rl 3 Id al b.4 lx rr; Reservoir level Thestatic water surface elevation of s. reservoir.
Reservoir Regulation A document which isto be used as a Guide 'zy Manual the responsible agency in the day to cay operation of a reservoir. The manual shall discussthe following topics: description of the project,history of the projec:, watershedcharacteristics, data ca1lecki.cn andcommunication networks, hydroloqic forecasts, the water control plan, and watercontrol management. Runoff The flow of water in a watercourse in responseto rainfallor snomelt or 2 combination ofrainfall and snowmelt. 'Runoff volume, 30-day Maximum30-consecutive-day runoff volurne (30-day volume) that occurs in any water year. Runoff volume,90-day Maximum90-consecutive-day runoff voluxe (90-day volume) that occurs in any water year. Runoff volume, The estimatedvolume90-day 90-percent, unregulatedrunoff with 90-percerr a 9O-day probability of being equalled or exceeded ky the actual runoff.
Saskatchewan works The works described in Article 111 of the subject Agreement in Saskatchewan, Canadz, to include Rafferty Dam, Alameda Dam, 2F.C the Boundary Diversion Channel. Sherwood Crossing The Internationalgaging station, number 05114000 (05ND007), latitude 48:59:24, longitude 101:57:28, on the Souris Xiver, 0.8 mile downstream of the International boundary. Sherwood Crossing The uncontrolled volume from the Canacizr. uncontrolled Reservoirs,if any, and thelocal flsw runoff volume betweentheCanadian Reservoirs 2 "C Sherwood Crossing. SourisBasin developmentThe and operation of t?.e Pro ject (Proj ect) Saskatchewanworks in Canada ; i".=" operation of existingthe -Dound2r" Reservoir in Saskztchewan 2r.d the c?er?Eicn of theexisting Lake Darling Xeser-~c in North Dakota in the United States.
Spills The uncontrolled discharge of water Ercz 2 reservoir.
A-6 Target drawdown level A pool level to which a reservoir should je loweredin response to estimated sprizq runoff so that the desired level of flccd protection will be provided. Target flow The instantaneousflowat a given locationthat should not be exceeded during a given flood event as a result of releases from a reservoir or reservoirs. Temporary target flow A target flow at Sherwood Crossing that has beenmodified to takeinto acc3unz available storage in Lake Darling. Uncontrolled volume The volumeofrunoff that cannot be controlled by the available flood contrzl storage. Unregulated flow That flow thatwould occur at Sher-..:gcd at Sherwood Crossing Crossing if Rafferty Dam and Alameda bier2Dam not in place.
Water year October 1 to September 30. Westhope Crossing The Internationalgaging station, nunber 05NF012 (15124000), latitude 48:59:47, longitude 100:57:29, on the Souris River i.6 kilometres upstream ofthe International boundary. 1.2 Abbreviations and symbols Followingis a list Operating Plan:
ac-ft acre-feet cf s cubic feet per second. dam3 cubic decametre ft feet m metre m3/ s cubic metres per second km kilometre
A-7 1.3 Conversion Factors As provided in the subject agreement, the following table may - usedto convert measurements in the English (United States) system of units to the SI or metric' (Canadian) systemof units.
Multiply English Units by To obtain SI Units Length 25.4 ""millimetre (mm)
0.3048 ""metre (m)
1.609344 -"- kilometre (kn) Area 2.590 -"- square kilometre(kn')
4046.9 ""square metre (n2) Flow cubic foot per second------0.02831685 ----cubic metre per seccnd (cfs) (m3/s 1 Volume acre-foot (ac-ft)------1.233482 ""cubic decametre (dan') Velocity foot per second (ft/s)----- 0.3048 ""metre per second (n/s) Slope foot per mile (ft/mi)------0.1894 ""metre per kilonetre (m/km) 1 ha = 10,000 mz == ha x 2.471054 = acre
1 dam3 = 1,000 m3 == dam3 x 0.811 = ac-ft
2.0 HYDROMETEOROLOGICAL DATA NETWORK 2.1 General
The collectionand distribution of hydrologic 2nd meteorological data in the Souris River basin involves governnezt agenciesin the United.States andCanada. The 2atz collection networkisvital tothe successful operation of Rafferty Reservoir, Boundary Reservoir, and Alameda'Reservoir in Canada ai?.',
Lake Darling in the United States. The network may be modifi=.':""d from time to time..?he data collection network is cperated by 55s following agencies.
A- 0 .'
Canada In Canada, the Water Resources Branch sperates and naintains a network of hydrometricstations to record streanflow ana ~2~21: levels andthe Atxospheric Environment Service cperates 2nd maintains a network of meteorologicalst3tions. Seth the ~zzsr Survey of Canada and the Atmospheric EnvircnxentSemice are part 2: Environment Canada, a Federal g0vernrner.t aqency. In zdciticn, the SaskatchewanWater Corporation, a ProvincizlCrown Car?oratisn, operates a nunber of snowcourse stations in the basin. The purpose of the snow course measurementsis to provide additionaldzza. for estimating spring runoff. United States In the UnitedStates, the U.S. Geological Survey cperates zzd maintains a network of hydrometric stations to record streemflz-:; and water levels, and the National Weather Sepice operates sn5 maintains a network of meteorological stations. Both crganizaticzs areFederal agencies. additionIn to the neteorolcgical stations, theNational Weather Service undertakes. eerizl gaczz surveys toprovide additional snow data for estimatingspring runoff. The networks operated by these agencies ars shown on the nap in figure A-2 and are described in the following section. 2.2 Station Networks
The existing hydrometric station networks are shownon Table 2.1'=-""e Canada and on Table 2.2 for the United States.
The existing meteorological station networks are shown onTable 2.3 for Canada and on Table2.4 for the UnitedSC3tes. 2.3 Addition21 Stations
Gages and methods will be established . to zeasure inf?ow, 3CZL levels, anddownstream flows for Rzfferty ReserJoir en2 fsr AlamedaReservoir. Additional gaging stztions nay 5e added z: ensure the appropriate operation of theProjeC. 2.4 Data Collection, Estimating, and Coordination
A-9 I I L i ac XYDROETTZIC STATION
StationStation Name Location No. Lztitude Longitxde
05NA003 Long Creek at 49 00 01 103 21 08 (05113360) WesternCrossing
05NA004 Long Creeknear 49 15 32 103 57 22 Maxim
05NA005 Gibson Creek 49 29 02 104 20 11 near Raaville
OSNX006 Larson Reservoir 49 28 30 104 16 50 near zadville
05N3001 Long Creeknear 49 06 15 103 00 48 Estevan
OSNB009 Souris River nr. 49 04 34 102 45 53 Roche 3ercee
05NBOll Yellow Grass 49 47 11 104 02 16 ditch near Yellow Grass
05NB012 Boundary Res. 49 05 49 103 01 28 near Sstevan
0~~014Jewel Creek nr. . 49 23 10 103 42 42 Goodwzter
05N3015 Roughbark Res. 49 30 08 103 43 07 near Weyburn
05N5017 Souris River nr. 49 29 37 103 39 44 HalSrite
05NB018 Tatap-a Lzke Dr. 49 35 sa 103 56 50 near Weyburn
05N3020 Nickle Lake nr. 49 36 33 103 47 23 Keyburn
Sholrl Creeknr. 49 01 52 102 50 57
49 17 23
$9 58 37 104 or, 33 staticn Station Name Location Tyge Nc. Latitude Longittlde
05N3029 Dead Lake - 49 17 23 1C3 26 40 Water level;auco SourisRiver recDr=iuer
05NB030 SourisRiver 4946 10 104 00 54 Flow; zuto r=corder near McTaggart seascnal
05NB031 souris River 5949 20 104 11 24 nearBechard
05NC001 Moose Mountain 49 52 23 103 00 54 Flow; 2ut0 recor~er. Creek below seascnal Moose Mountain Lake
O5NC002 XooseMountain 49 53 29 103 01 58 Water level;auto Reservoir nr. Corning recorder
05ND001 SourisRiver 49 11 02 102 01 42 Flow; est3 r2corCiEr nr. Glen Ewen
05ND004 Moose Mountain 49 13 58 102 13 41 Flow; auto rscox Creek nr. Oxbow seasonal
05NF006 LightningCreek 49 13 17 101 43 06 Flow; 2ut3 recsre5r nearCarnduff seasonzl
05NF010 Antler River 49 35 03 101 50 52 Flow; auto recor5F-r near Wauchope seasonal
05NF013 GainsSorough 39 24 51 101 31 36 Creeknear Sta,"thoaks
23-131 SourisRiver at 49 07 42 103 01 17 Flow; rnanuzl $18 Iiighway recorder; -=xtr~r.,r?_ flow only
24-132 Scuris ?.iiver at 49 07 11 102 59 32 r- low; nanuzl 847 HiGhway recorder; Extrl-3~ flow only
24-133 Souris River at $9 13 04 102 11 08 oxsow
49 40 50 TABLE 2.2 HYDROMETRIC STATION NETWORK FOR SObXTS BASIN IN NORTS CAXL7T.A
StationStation Name Location Tyr, e No. Latitude Longitude
05114000Souris River 48 59 24 101 57 28 nr. Sherdood
05115500Lake Dzrling 48 2727 101 35 14 Water l;.vp,I; zu~o near Foxholm recorder
05116000 Souris River 48 22 20 101 30 18 Flow; acto recsrdsr: near Foxholm Telemark
05116500 Des Lacs River 48 22 14 101 34 11 Flow; atic-io , recordsr ; near Foxholm Telernark 05117500Souris River 48 14 45 101 22 15 Flow; auto recorder above Minot rn elemarlc
05120000Souris River 38 09 3s 100 43 45 z- low; aut3 rec-ior:sr near Verendrye
05120500 Wintering River 48 10 14 100 2032 Flow; auto recor5zr near Xzrlsruhe
05122000Souris River 48 2030 100 26 04 Flow; acto rscorder; near Bantry Telemark
05123000 Lake Metigoshe 48 59 05 100 20 52 Water level; auto near Bottineau recorder
05123500.Deep River near Upham
OS123900 3oundz--y Creek 48 48 46 100 51 46 Flow; 2Ct3 r2c3re2z nedr Lznda TABTS 2.3 METEOROL3GICAL STATION NZTWORK FOR SOURIS BASIY IY SAS'KATCI-:ZSV'XN
Alameda 49 24 102 16 x 4010150 49 37 104 44 xx Fmulet v Arcola COA 4010240 49 38 102 32 A 4010540 50 03 104 13 xx Bechard V Broadview 4010879 50 23 102 35 xxxA XX x .x Carlyle 4011160 49 38 102 17 xx Carlyle 49 39 102 16 x Carlyle C-7 49 39 102 20 x Carnduf f 4011250 49 13 101 45 X Ceylon 4011441 49 24 104 39 xx Davin 4012162 SO 24 104 11 X Cavin 4012165 50 22 104 09 x Davin 4012166 SO 23 104 10 xx X X Estevan 49 05 102 59 x 103 00 X xx:i XX Estevan A 4012400 49 04 xxx v Estevan C-9 49 08 102 56 .'L Fertile 4012485 49.20 101 27 xx Fleming S. 4012525 50 02 101 35 X Francis 4012720 50 07 103 55 xx Frobisher 49 13 102 09 X Gainsborough 4012790 49 18 101 32 X Glenavon 50 12 103 08 x Hzndsworth 4013098 48 51 102 52 xx Kandswortn 49 53 103 02 x Heward 4013221 49 45 103 09 xx Hitchcock 49 15 103 10 X Hune 49 40 103 37 x Indian Head CDA 4013480 50 32 103 40 xx X Indian Head PFRA 4013490 50 31 1C)3 41 xx x x X
Kipling 4014040 50 12102 44 xx KisSey 49 40 102 45 X
*TS - Temperature EV - Evapora"cion PR - preci2itation SV - Sunshine 'rTw - Hourly Weather SS - Snow Survey ~li- ?.ate of ?.zinfall NS - Nipner SROW Me2Surhe2CS ST - Soil Texgerature WS - Piindsgeod Station Name StationLocation Obse-rviilg 3rograns 5. "- Latitude Longitade TX ?X ?T?i Xi7 ST Z'V SU SS NS ax:
Macmn 4014870 14 49 103 14 x Maryfield 401504549 50 32 101 xx Maxi= 103 39 19 57 x Midale 24 494015160 103 25 xx Moose Mountain xesenoir 4015344 4953 103 02 xx X Moosomin 4015360 50 09 101 40 xx Neptune 4922 104 06 x Neptune S . 4919 10402 X Noonan N. D. 48 57 10303 X Odessa 4015648 50 20 103 41 xx Oungre 49 09 103 45 x Oxbow 4015800 4919 102 07 xx oxsow 3914 10207 x Racviile CDA 4016400 4930 104 17 X Eledvers 4016522 4932 101 42 XX ToruTay 4018105 49 05 103 30 X Trossachs N.Z. 49 36 104 11 x Trossachs S. 4934 104 17 x Wapella - Newfinland 40185oa 50 27 101 56 xx
'.'.I 'w'awcta 49 4018678 56 101 58. xx xxx
Weyburn 49 40 103 53 X W Weyburn 2 103 40 4018762 49 51 A Willmar 4018960 30 10249 25 X Yellow Grass 401904049 48 io4 10 xx
*TS - Tenperature HV - Evaporation ?R - Precipitation SU - Sunshine ?X - Hourly Weather SS - Snow SurJey 3.3 - Rate of Rainfall NS - Nipher Snow Measurecents ST - Soil Tenperature WS - Windspeed TXBLS 2.3 MZTEOROLSGICXL STATION NETWORX FOR SOUXIS 3ASiN IN NOF?TX DAKOTA Location Cbse-minq Programs * Station Name " LatitudeLongitude ?R TE ss t.li~ sz -
.Wrose 49 00 103 28.. X X 48 50 99 45 X X X Belcourt v Berthold 48 19 44101 A X 3ottineau 48 50 100 27 X X X aowbells 48 48 102 15 X X X Butte 47 50 100 40 X X x 38 55 102 50 X X Columbus V Crosby 5448 103 18 X A x Drake 8NE 48 02 100 17 X X X Fortuna IW 48 55 103 49 x X X Foxholm 7N 48 20 101 33 X x X 48 16 100 51 X X X Granville v Kenmare 48 4.9 102 06 X X A Lake 48 59 100 21 X x Metigoshe V Max 47 49 101 18 A X X Minot 48 16 101 17 X X X x .. ?.LA v CL A. .. Minot 31. 48 II 101 18 x X x E-. v Mohall 48 48 101 31 A X X Rolla 3NW 48 54 99 40 X X X Rugby 48 21 100 00 x X X Sherrtood 3N 49 00 101 38 X X V Tagus 48 20 101 56 A X Tower NE 48 21 100 23 x X X Upnam 3N 48 37 100 43 X X X WesthoDe 48 55 101 22 X X X
*PR - Precipitaticn TE - Temperature SS - Snow Survey hi- - Eiourly Neather SU - Sunshine ETJ - Evaporation
3.0 CONTRCL POiPJTS Table 3.1 DATA TOR ESERVOIRS
Description Zlevation
Raffertv Reservoir Maximum allowable 554.00 m 633,000 dam 3 flood level (1817.59 ft) (513,000 ac-ft)
Fullsupply level 550.50 m 439,600 dzm5 (1806.10 ft) (356,400 ac-f<)
Noma1level prior 549.50 m 394 , 000 darn’ ,to s?ring, runoff (1802.82 ft) (319 , 000 ac-ft)
Minimum supplylevel 537.50 m 13 , 000 cam’ (1763.45 ft) (10, 000 ac-ft) Boundarv Reservoir Full supply level 560.83 m 61,500 darn3 (1840.00 ft) (49, 800 ac-ft) 3 Minimum supply level 553.21 m 24 , 900 czm (1815.00 ft) (20,300 ac-ft) Alameda ?.eservoir Maxisum allowable 567.00 in 189 , 500 dam’ flood level (1860.24 ft) (153,710 ac-ft)
Fullsupply level 562.00 m 105,500 darn2 (1843 -83 ft) (85,530 ac-ft) goma1 levelprior 561.00 m 94,245 dm’ to spring runoff (1840.55 ft) (76,400 ac-=”L L)
Xinimum supplylevel 555.35 m SO,700 dam’ (1823.65 ft) (41,100 ac-ft) Lake Darlina Reservoir Maxinum zllowable 1601.00 ft flood level (487.98 m) -. Full supplylevel 1597.00 ft 110,000 ac--1= (486.77 m) (136,000 dam’)
1577.00 ft 3 , 500 2C“ft (480.57 m) (4, 300 dZT?j E leva tion ,orage Elevation metres feet dam" ac-ft
547.5 1796.25 305287 247500 Maxisum rewired drawdown (11 549.5 1802.82 392371 318100 Normal drawdown (2) 550.5 18.06.10 439613 356400 iSL 554.0 1817.59 632776 513000 Maximum storage level
E leva tion SurfaceElevation Area Storage metre feet ha acres darn3 ac-ft
535.0 1755.25 0 0 0 0 537.0 1761.81 807 1992 4737 3840 538.0 1765.09 1464 3614 16159 13 100 540.0 1771.65 2495 5159 56370 45700 545.0 1788.06 3574 8822 209075 169500 546.0 1791.34 3795 9367 245833 199300 547.0 1794.62 4022 9928 284811 230900 547.5 1796.25 4134 10205 305287 247500 549.0 1801.18 4480 11060 359675 299700 549.5 1802.82 4599 11353 392371 316100 550.0 1804.46 4719 11549 416547 337700 550.5 1806.10 4881 12048 439613 356400 551.0 1807.74 5045 12454 464306 376500 551.5 1809.38 5212 12866 490062 397300 552.0 1811.02 5407 13347 515582 418800 552.5 1812.56 5605 13836 543966 441000 553.0 1814.30 5807 14334 572459 464100 553.5 1815.94 6012 14841 602063 488100 554.0 1817.59 6222 15360 632776 513000 555.0 1820.87 6651 16418 697041 565100
1. Assuming stzrtingelevation of 547.5 metres, flood control storageavailzble would be 632,775 (513,000) - 305,287(247,500) = 327,489 dam' (265,500 ac-ft) (FSL = 550.5(.
2. Assuning stzrting elevation of 549.5 metres, flcod controlstorage available would 5e 532,776 (513,000) - 392,371(318,100) = 240,405 dam3 (194,900 ac-ft) (?SL = 550.5(. 3.2 3oundaAry Dam
The relevantdata for this control point zr'e shown cn Tables 2.1 and 3.3.
Elevation Storage metre feet dam' ac-ft
557.8 1830.0 44725 36259 *Xax reqired drtwdown (1)- 560.8 1840.0 61480 49845 FSL, Normal, & Max.
Elevation Surface Area Storage metre feet ha acres dam3 ZC-ft
554.7 1820.0 407 1005 30691 24882 555,s 1822.51049 425 33970 27540 556.3 1825.0 445 1C98 37400 30320 557.0 1827.5 486 1200 41000 33240 557.8 1830.0 506 1249 43725 36259 558.5 1832.51348 546 48625 39420 559.3 1835.0 547 13 50 4270052670 560.1 1837.5560.1 607 56910 1498 46140 1840 .0 688 1698 61480560.8 1698 6881840.0 49845
1. At maximum rl-Tired drawdown levcl of 557.8 mecres (1830 feet) , storageavailable would Se 61,3480 (49,845) - 44,725(36,259) = 16,755 dam (13,586 == 13 , 600 ac-ft) . This necesszr'r storage may also be obtained by drawing Rzffert'J below required levels and diverting the 16,755 dam' (13 , 600 ac-ft) to gaffe-ey Resemoir. 3.3 Alzmeda Dam
The relevant datafor this control point are shotin on Tables 2.1 2.7~ 3.4. The elevaticn-area-capacity caves ere shown on Plate A-S.
Elev atio n Storage Elevation metresac-ft dam3 feet
555.85 1823.65 50700 41100 Maximum raquired drawdown (I)' 561. o 1840.55 94245 76400 Normal drawdown (2) 562. o 1843.83 105500 85530 FSL 567.0 1860.24 189600 153710 ~aximumstorage level Elevation Surface Area Storage e. metres feet ha acres darn3 ZC-L-, 528.0 1732.28 0 0 0 0 530.0 1738 .a427 11 110 90 532.0 1745.4167 27 490 400 534.0 1751.97 101 41 1170 950 536.0 1758.53 143 58 2160 1750 538.0 1765.09538.0 77 190 .' 3500 2540 540.0 1771.65 93 230 5200 4215 542.0 1778.21 124 306 7370 5975 544.0 1784.78 156. 385 10170 8245 546.0 1791.34 200 494 13700 11110 548.0 1797.90 253 625 18260 14805 550.0 1804.46 3 18 785 23970 19430 552.0 1811.02 386 953 31000 25130 554.0 1817.59 495 1222 39800 32265 555.85 1823.65 624 154 0 50700 41100 556.0 1824.15 635 1567 51100 41425 558.0 1830.71 770 1900 65160 52825 560.0 1837.27 1010 2493 82990 67250 561.0 1840.55 112s 2777 94245 75400 562.0 '1843.83 1240 3061 105500 85530 564.0 1850.39 1520 3752 i33200 107990 566.0 1856.96 1940 4789 167800 1x040 567.0 1860.24 2180 5381 189600 153710 568.0 1863 .sz 2420 5974 211400 171385 569.0 1866.80 2660 6566 236800 191980
1. Assuming starting elevation of 555.85 metres, flood control storage zvailable puld be 189,600 (153,710) - 50,700 (41,100) = 138,900 dam 3 (112,608 ac-ft) (FSL = 562.0(. 3.4 Lake Darling Dan
Elevation Storage feet metres ac-ft dm3
1591 484.94 53,000 65,375 Maximum drawdown (1) 1596. 486.46 99,000 122,115 Nornal drawdown (2) 1597 486.77 110,100 135,800 Normal pool 1601 487.98 158,600195,063 Existingmaxinun Ele vatio n Surface AreaElevationSurface Starage feet metres feet xres ha ac-ft daiii 3
1591.0 484 -94 7,431 3 , 010 53 ,000 65 , 375 1592.0 485.24 8,200 3,322 60,800 75,000 1593.0 485.55 8 ,910 3,610 69,400 as ,600 1594.0 485.85 9 , 650 3 , 910 78 ,600 96,950 1595.0 486.16 10 ,220 4,140 88 , 600 109,290 1596.0 486.46 10 ,800 4 ,375 99 ,000 122,115 1597.0 486.77 11,270 4 ,566 110 ,100 135,800 1598.0 487.07 li,750 4 , 750 12i,600 150 , 000 1599.0 487.38 12,150 4,922 133 ,600 164 , 790 1600.0 487.68 12 ,550 5 ,084 145 ,900 179 ,955 1601.0 487.98 12 , 900 5,226 158 , 600 195,630
Servica spillway crest at 1598.0 feet.
1. Assaning a starting elevation of 1591 feet, flccc cmtrol storage available would be 156,600 (195,630) - 53,000 (65,375) = 105,600 ac-ft (130,255 dam')
2. Assuming a starting eicvation of 1596 feet, flccd controlstorage avzilabie would be 158,500 (155,630) - 99,000 (122,115) = 59,600 ac-ft (73,515 This contr=lpoint is the Interzational cjaqing statior?, ZCZi~SZ 6'- n 05115000, lztituae 48:59:24, longitude 101':57:28, cn Lr-- ScCZiS River, 0.8 slile downstream of the International bocndzry. 3.6 SourisRiver above Minoc The control point, Souris Riverabove Minot, is a =LOW in5 stationoperated by t,ie U.S. GeologicalSurvey and maintained by t?.e North Dakota State WaterCommission. The station number 15 05117500. The station is located approxinately 3.5 miles (5 v e st 0: Minot,North Dakota , andapproximat.ely '7 nil 11 kz 1 downstreamfrom theconfluence theof souris Des Rivers. The caordinates of thestztion are lzt $8: longitude 101:22:i5. 3.7 SourisRiver near Westhope Crossing This controlpoint is theInternational qaging station, r,ui;l.Ser 05NF012, latitude 48:59:47, longitude 100:57:29, on the Scufis rive: 1.6 kilometres upstream of.the International Sounds-zy near .-westhoce, NorthDakota. 3.8 Bounca-ry DiversionChannel .. . Boundary-Diversion Channel may be used for floodcsntral prav-sez thatstorage is availableRaffertyin Rese,-voir in excess cf the amount requiredto . meet UnitedStates flcoa ccntrsl requirementsin that year, by the amount of volume to be diverted. 3.9 'Other Considerations This OperatingPlan for the Canadian rssemoirs and Lake DarLiZ$ Reservoirrequires that flood pretection be ;;rovided for urbar. 2ne =1 -PC rural downstream areas. The operation of the Projectfor "VU flows will consider theapproximate bankfull channel capacizils ofurban and ruralreaches. Release rates will be based on r2eucinq flood damages as much as pcssible. An indication cf the flows 3, whichflooding occurs is providedTablein 3.6, for VariScS reaches of the SourisRiver, ' Long Creekand Moose Xocnt2in Creek. These flows should be consideredas approximate only. Description of Reach Long Creek aounda,ry Dam to SourisRiver 25 m3/s (900 cfs) Moose Mountain Creek 3 Alameda Dam toSouris River 50 m /s (I,800 cfs) SourisRiver Rafferty Dam to Long Creek 14 m:/s (500 cfs) * Long Creek to Shznd 85 m_/s (3,000 cfs) Shand to Moose Mountain Creek 60 d/s (2,000 cfs) Souris River at Oxbow 90 m:/s (3 , 200 cfs) Souris River at Shemood Crossing 90 m3/s (3,200 cfs) Sherqood to UpperSouris Refuge 60 m/s (2,000 cfs) Upper SourisRefuge to Lake Darling Dam Rese-voir pool Lake Darling Dam to Minot 2,500 cfs <70 ia3/s) Souris River at Minot 5,000 cfs (215 $/s) Minot to Logan. 2,500 cfs (70 mf/s) Logan to Velva 1,400 cfs (40 n:/s) Velva to. Verendrye 1,400 cfs (40 mf/s) Verendrye to WinteringRiver 1,500 cfs (42 n”/s) Wintering River to Towner 600 cfs. (17 $’/s) Towner to Coulter 200 cfs (6 m”/s) 3 Coulter to Melita 600 cfs (17 m /s) Melitato Hartney 1,100 cfs (31 m’/s) *Withproposed channel improvements. 4.0 PROJZCT OPEXATION 4.1 Objectivesand Procedures The objectives to be inulemented by this FloodOperation If a FebrJary 1 orsubsequent spring mncff estiazte shows a reasonablechance (50 percent) of a runoff volume at Shezxzcd Crossingbeing equzl toor greater than a 10-percenz (I in 13 - i. years)flood, then operations will proceed on. the bzsis cz -2 e floodOperating Plan. Flood operation will cease when flzed volumeshave Seen dischzrged and streamflows are at or Selcw 500 c:s at Minot. NonfloodOperation If a February 1 or subsequentspring runoff estimate shows 2 reasonablechance (50 percent) of a mnoffevent less than a 19- percent (I in 10 years) flood, thenoperations will 2roceed on t:?~ basis of thenonflood Operating Plan. 4.2 Consistencywith interim Measures As set out in the 1959 Interin Measures as modified,under cerzzin conditions, a portion of theNorth Dakota. share will be in t:?s form of evaporation from RaffertyReservoir endAlameea Xeservcir. Duringyears when these conditionsoccur, the mininurn amount cf flowactually passed to North Dakots. will be 40 percer,t v- the natural.flow at Sherwood Crossing. This lesser amount is j recognitionofSaskatchewan's agreement tooperate both Raffer Dam and Alameda Dam forflood control and forevaporztion a 1 result of the Project.Therefore, this is deened to bein c3rnpliznc2 with allapplicable obligations. The volume of natural flcw :ti11 be dete,-;ninecl by the IntenationalSouris'River Board of Concrsl ( "the Board" ) . The following rules detsmine the percentage of the natural flcw 2: Sherwood Crossing which is to be passed to NorthDakota. a. If the level of Lake DarlixgReservoir is below 2:: elevation of 1592.0 feet (485.24 metrss) on October .1 in 22:- calendaryear, Saskatchewan will pass 50 percext sf th~ naturalflcw Sherdoodat Crossing inthat year 2nd ir succeedingyears until the level of Lake Darling Xeservcir is aboveanelevation of 1593.0 feet (485.55 zetres! 2:: October I. b. If the naturalflow at ShercoodCrossing is equal to cr Izss than 20,000 acre-feet (24,700 cubic decametres) prlcr =z October 1 of that year,then Saskazchewan ;ill pass zc:-1 percentof that natural flow to North Dakota in th~tca~sz~z~ year. C. d. If releases are delayed,they nay be called fsr zt ZP.~ time before October 1. If they are not called fcr bef3rz October 1 , the water may be recained far us2 In Saskatchewan. Lake DarlingRese,noir and the Canadian rese,-voirs will be operated (insofar . as is compatible with the ?roj.ect‘s purpses 2. ric consistentwithpastpractices) ensureto that the pccl elevations, which deternineconditions for sharingevapor=Elzn losses,are. not artificially altered. The triggeringelevatisn of 1592.0 feet (485.24 metres) for Lake Darling Resemcir is besee on existingwater uses in North Dakota, including refuges cperzzoe by the U.S. ?ish- and Wilctlife Service. Each year,cperzting plans far the refuges on the SourisRiver will be presented ts the Board.Barring unforeseen circumstances, cperztions will follcx saidplans during each given year. Lake DarlingReservoir will nct be drawn down for thesole puqose of reaching the elevation of 1592.0 feet (485.24 metres) on October 1. Late seasan releases will notbe made by Saskatchewan Kacsr Corporation from theCanadian reserroirs for thesole purFcss cf raisingthe elevation of Lake Darling Rese,-voir above 1593.0 feet (485.55 metres) on October 1. Flow releases to tne United States shouldoccur (except in flcoc years) in the pattern whichwould have occurred in a state of natars. To theextent possible and in consideration of potentialchamel losses and operatingefficiencies, releases from theCanadian elm Will be scheduled to coincide with periods of beneficial use in EIcry:?. Dakota.Normally,, the period of beneficial use in North Dak,st= coincides with the timing of thenatural hydrcgraph, and that tizinq Should be a guide to releases of the UnitedStates portion cf -ha natural flow. The flow release to theUnited States may be delzyk when theState of NorthDakota dete-qines and notifies Saskstcher,*jEn throughthe Board thatthe release wouldnor be of benezlt to 5:s Stateat that time. The delayedrelease nay be retained. fcr cse iz Saskatchewan,notwithstanding the minimum rslease limits, unless iz is called for by the State of NorthDakota through the B~ard befsra October 1 of eachyear. The delayedrelease shall be measurec! zt =?,E point. of releaseand the delive-y at ShervJocd Crossing shell nct ks -. lessthan the delayed release minus the.conveyance losses tkzt VCCIZ .haveoccurred under natxral conditions between the point of rele~s2 ana the ShemoodCrossing. Prior to these releases5einq xzds, consultztions shzll occurSetween the Saskztckewan ‘N‘ater Ccr?craticn, the U.S. Fish and Wildlife Service, 2nd the State of Nor~h DaXz~2. All releases will be within the specified tar52t flows at the csfi~r31 points. 4.3 ~loocOperation General This section sets forththe Operating Plan for Rafferzy Zeservcir, Alameda Reservoir, Boundary Reservoir,and Lake Darl ir. : -. Rese-rvoir forflood control. general,In the purpose is =.; follows:the three reservoirs in Canada are to be operated in such z manner so that, along with Lake DarlingReservoir, it will k~ possible to obtain1-percent (100-year) level of protection zc Minot. The l-percentlevel of protectionat Minot allobis z maxi?num discharge of 5,000 cfs. After thespring estimats c: streamflow is received, .- a 1-percent or greaterflood volurr.: is anticipated, it will be necessary to draw Lake Darling Resz,rvcir down' to anelevation of 1591.0 feet, to draw RaffertyReservoir down to anelevation of. 547.5metres, to draw Alameda Reservoir aoc to anelevation of 555.85 metres, and to drawBoundary 'Reservoir down to zn elevation of 557.8 metres qiventhat the estimat5:S 90-day volume as set forth inPlates A-l to A-3 and the estimatct 30-dayvolume inPlate A-4 will require the maximum rsquirsd cirawdown levels. As discussedin Section 3.2, additional drawdoc:: inRafferty Reservoir may be usedin lieu of drawdown of Boundzry Rese-oir. Themanner in which this is to be accamplisheband =:?e reasons for doing so arepresented in the following sections. "_.. thosecases where the floodevent is greaterthan a l-percent (1OC- year)event, the Project will beoperated as set forth in - ReservoirRegulation Xanuals toattemFt to reducedownstream dami;- f withoutendangering the structures thenselves. This nay requirz flows grp-ater 5;OOO cfs at Minot theperiod before ZazE than for .. 1, and may alsorequire flows greater than 500 cfs (which CCC:~~ also exceed 5,000 cfs) afterJune 1. The Canadianreservoirs will be operated for Sherwocd Crcssin; giving due consideration to thelevel at Lake Darling Resencir 2:i the flow at Minot. It is not possible to obtainl-?ercenr (100-year)flood protection at Minotunless Rafferty ReserTJJ=iri Alameda Reservoir, Boundary Reservoir,and Lake Darling ReserJcir 2rE operatedas a complete system. Thissection will be used when theestimated 30-day unroqulzzfr volume at Sherwrood Crossing equalsorexceeds a 10-l;ercent (1:- year) event,which is equal to 175,200 ac-ft (216,110 dam') ; ' ar?d/cr when the local 30-day volume at Sherwrocc Crossi?g Is ex?ect=c! z: equal or exceed 30,000 acre-feet (37,000 dam3). From the perica cf recordat She-Tcod Crossing, 1930 to 1988 , 58 years, 2.". OperatingPlan wouldhave been usedapproxiaately 6 tizes, cr zbcC:= 10 percent of the time. The floodOperating Plan is divided into four separate >nas2s in accordancewith the annual hydrograph. These phasesrelazs 23: a. Operations to lower reservoirs prior t=, spring runor^=. b. Operations during spring runoff. c. Ouerations- after runoff to restore reservoirs to full supply level. d. Operationsduring the summer, fall, and winter. 4.3.1 Drawdown Prior to Spring Runoff The drawdown of Rafferty Reserroir, Boundz-zy Rese-Tvoir, AlarneCt Reservoir and Lake Darling Rese,moir in response to a qivsr. predictedflood event is an integralpart of the Operating ?lan. -T5a extent of drawdown will depend cn the estinated ssring rclnorz" volume foreach as shown on the curves in Plates A-1 to A-4, Any releases from Lake Darling . Reservoir inusttzke :riz2 considerationinflows resulting from releases from the' CanecF-n reserzoirs andany localinflow between the Cznzdian T~S~TVOFIS andLake Darling Rese-rvoir. Regardlesstheofestimated volumes of runoff, the reservoizs will cperatedbe to ensurethateach is at or below tka following pool levels by February 1. a. RaffertyReservoir - 549.50 m. (1802.82 ft.) b. Alameda Reservoir - 561.00 m, (18.40.55 ft.) c. Lake DarlingXesenoir - 1596.00 ft. (486.46 m.) The reservoirs will be drawn down, appropriate,as over the summer, fall, and wintermonths, and release rates will taks incz considerationchannel and ice conditions.Release rates will be set to ensurethat the maximum controlled flow at ShemcoC Crsssinq will not exceed the followingrates, provided Lake Qzrlix~ Reservoir is at or below full supplylevel: a.June 1 to August 31 - 11 mS/s (400 cfs) b. September I to January 31 - 14 mf/s (500 cfs) c. February 1 to March 15 - 60 ZI~S(2,120 cfs) d. March 16 to May 31 - 90 m3/s (3,200 cfs; up to.50-yr) 113 m /s (4,000 cfs; over 50-yr) Estimates of spring runoff will be made initizlly on Febn2-y 1 2r.c thereafter on the15th and last day of ezch month uzcil ru~cz~" occurs. The target drawdown levels will be zs shown on Tlztes -:-- 1 through A-4. Forthe Canadian reservoirs', these levels ~rekaseC on the 90-percent 90-dzy spring runoff volume for each z2s2rvsir. ~sin5this parameter will ensurethat cperating the ' ~anzcirz reservoirs for flood control will not czmprsinlse the ~ccszti~~ c For i ... ,cz the supply of yater. Lake Darling Fieser;;cir, "" rsrget drawdown level is based on che estirnztee ShP-r:.;CC5 Crossinguncontrolled runoff volume and 2 sliclixq scz!lc, relzzi:.; - c- Lko, runoff volume t=,a Lake Darling Sese-Tvcir level 2s shown y.. Plate A-4. As theestimated spring ,unoff volume is -1-uyca-, during the spring,the Lake DarlingReserroir target level will al- change. . Should the level of myreservoir on February 1 be hiqher thar its target drawdown level,releases will be made as ZeszrFbe5 below.Should thelevel for a reservoir on February 1 bs equal to orlower than the target drawdown level, no relezses need be made from that reservoir. Channel Ice Effects The Reservoir Regulation Manuals will includefettuzrs th25 will directly- address the ice problems thtt may occur. Rafferty Reservoir and Alameda Reservoir The drawdown of RafferyyReservoir and Alameda Rese~cir will 5e the responsibility of theSaskatchewan Water Csrporation. 2eleasez from eachreservoir will be made toachieve its target ciravcov?~ level. While thereservoirs are being drawn down, thetctal fl=w 2’= Sherwood Crossing shouldnot exceed the peak target flow r’rr, Plate A-5. The releaserate will takeinto consideration ice and char~~el conditionsbetween the Canadianreservoirs and Lake Darl Reservoir.Suchreleases will be reviewedadjustedand ” necessary on a reqdlzr basis,at a minimum aftereach estimate k- thespring runoff’volune. Releases will beestablished achieveto the target draw2aw:- levels prior to the occurrence of spring runoff to the reserJoi-s. Boundary Reservoir andBoundary DiversionChannel Boundary.Rese-rvoir and the BoundaryDiversion Channel will 2s operztedwithin the limits of the drawdown curres. Bour?dCr’- Rese,voir will be drawn down ta theelevation shown on Plate A-2 providedthat the associated drawdown volume shown on ?late A-2 i: ewe1 to theestimatad 90-percent 90-day runoffvolume. To ccerzz-: the Boundary DiversionChannel, there must be excess ca-,zciz:. availableRaffertyin Reservoir to stors the divertsd Z~OUT‘Z. This excess capacitymust be in addition to tke capacity C!IE: would be made available as per Plate A-1. The operation cr‘ eec~ will attemut- to maximize floodreduction within the conscraizz~ of the requirements for water supply in Gzntdt. The oFeraticr. cf each will be such to ensure that the resulting peak flaw ’ =-” Sherwood Crossingduring runoff is not grezter than the peak vouldhave occurred without the oFeration of Bcundary RessrJ-Jci:.. and Sounaa,-y Diversion Channel: and that flood contrcl 5e prcv~;e: 2s set forth above. 'reflood Lake DarlingSpring Drawdown Drawdown of the Lake Darling Reservoir prior to a given flocc event is an integralpart of the overallOperating 312n. ~aks DarlingRese-oir drawdown is the first stepin the Operating P1-n and is inportantbecause the extent of drawdown hzs 2 direc-, relationshiptheto amountof storageavailable for' flood control. Drawdown. is dependent upon the runoff voluz;,e (uncontrolled)at Shemood Crossing, the rate of drawdown,and ihe time availablefor drawdown between March 1 andssrinq brsakup. Inaddition, it mustinclude the releaseof water fram the Caqtaiz? reservoirs if needed,or it couldbe reduced based on rzservolr levelsin Canada lowerthan what is needed for flood csntrol bassf on the estimated 30-day volume. The rateof drawdown sht11. 'se reviewed andadjusted on a regularschedule, as ,ne winter progresses,to ensure that the Lake Darling Reservoir will be at or below the targetelevation by April 1. Any drawdowns r=Gii-ed after April 1 snall be made afterconsultation with Manitoba. 4.3.2. Spring Runoff If the estimated uncontrolled volume is sufficient to raise Lake DarlingReserqoir to its full supply level of 1597.0 feec, thenthe Canadian dams will store water untilthey htve r22chee- their respective full supplylevels of 550.5 metres Tor RaffertyReservoir and 562.0 metres for Alameda 2eservoir. Once a reservoir has reached its full supply level, excess watsr will bereleased at a controlied rete inacmrdance with the terzs of theOperating Plan. If target drawdown levelsforRafferty Rese-oir end ALzme52 Reservoirwere not reached prior t:, thespring runof 2, then the volume theinreservoir above thetzrget drzwdown level cr. February 1 will bereleased within the specifiedtarget flows at controlpoints, and they will be caordinated with the U.S. Fish azC Wildlife Service and the State of North Da)cotz. SaskatchewanWater Coqoration may draw down thelevel of the Canadian resenoirs below their target drawdown level.. RelezssS resulting from said drawdown shall remainwithin the sTeci5ief target flows atcontrol points, however,and will be cDordinatzc with the representatives of the UnitedStates Departxent of the A-ZZy. The Q.S. Fish and Wildlife Service may draw down the level 25 Lake DarlingXeservoir below its target drawdown level to nee': fisk.- and wildlife needs.Xeleases resulting from said drewdcwr, w:l- renainvithin the specifiedtarget flows at control -351z'L5; ' however,they will be coordinatedwith the S.=ska=zhew2" Water ' Coporation,Manitaba Depzrtxent of Naturzl Xesoczces, 2 r: z the U.S. Depzrtmext of theAny. Sherwood CrcssingTarget Flow The Sherwood Crossingtarget flow is a function of the bke Dzrli~,~ Reservoirlevel which is itself a function of thetarget flow a: Minot. To enable theoperation of the totalsysten for thl,OS2 objectives set forthin Section 4.1, it is necessa,q to vary the target flows at Shemood Crossingas given on Plate A-5. The maximum targetflow at Sherwood Crossing will be as provided ir: Plate A-5, exceptthat, under certain conditions, the targetflcw may betemporarily lowered. Once Lake DarlingReserY'oir levels are lowered to a level whichallows the Kinot tzrget flow tg .kz maintained, the She-mood Crossing target flow czn be increzss? " to the starting value as was determined from ?late "5. - 1: releases from theCanadian reservoirs are not increased, then tks Lake Darling Dam operator must be notifiedi-mediately and relezs2s from Lake DarlingReserroir reduced accordingly. The maximum tarqe? flow will continuewhile water remainsabove FSL in either RaffertyReservoir or Alameda Reserqoirand Lake Dzrling Reservoir is below 1597 feet. By having a varyingtarget flow at Sherwocd Crossing, the summer releaseperiod would decrease, as well as tks problemswnich occur with long summer releases. Lake Darling Level The release of the maxinum targetflow at Sherdood Crossinc; r.4' allow Lake DarlingReservoir to release water at the Xinot t~rg.- level which may beabove the Shemood Crossing maxixun tzrgez level resulting in thelowering of the Lake Darling Reservoir 5elc:- 1597 feet. The need to drawLake DarlinqReservoir below 155- feet will- only occur when there is sufficient water in Zz~ffsrty Reservoir and Alameda Reservoirabove their iSL's tz fill Lak2 DarlingResenoir back to 1597 feet and will enable relezses cf excesswater during the periodbefore May 15 and at ..rscxcse levels before June 1. The drawing of Lake DarlingResemolr zelc:.: 1597 feet will allowthe summer release period to be shortznee zr.5 in some cases it will notbe needed. 4.3.3 Drawdown after Spring XQnoff If anyA of the reservoirs 2r0, above full sapy: spring-runoff has occurred,the reservoir brought down to full supply levelusing the Section 4.3.2. It should be noted that at from Canadianthe reservoirs cause the Crossing to exceed the targetflow from Plats A-5 cnless tke flc:;; cannot be controlled by the reser*roirs. Post-?o,ak Flcod Storage Release -2 full supply level, xith the following excepticns: a. After June 1, 500 cfs or less is maintained. b. After May 15, but beforeJune 1, thetarget flw 2: Xincz is maintained at a levelnot toexceed 2,500 cfs unci1 pool levelsreach FSL, unlessthe 5,000 cfstzrget nus? be extended to. enablethe desired reservoir levels to 2s reached by FeSr~ary1 ofthe following year. 4.3.4 Significznt Spring and Summer Rainfall If significantrainfall occurs during the s3ring cr summer flccd recession,the2esemoir Iiegulation Manual will provLde _-_;rr w discharging the rainfallrunoff Sased on followizq i.L22 unregulated flow recession. All rainfallinflow to Lake Czrlizq Reservoirabove FSL is dischzrgeduntil theunreqtllateC f 1 recessionat Minot reaches 500 cfs. All rainr'all mnoff upstre-2.- of Lzke DarlingResenoir which would cause flows inexcess of 500 cfs at Minot would Sestored, but not to exceed a reservcir elevation of 1598 feet. (Des Lacs flowcaul2 zit tines CEUSS flews hicjherthan 500 cfs at Minot.) 4.3.5Flood System Operation Steps The followingoperating steps wouldbe used when the Febxzzy 1 flow estimateexceeds the limits as set forth inSection 4.3. OPE,PATING PLAN STEFS These steps use EnglishUnits only toavoid confusion. I. PRE-FL30D (Februa,y 1 to stae of runoff) A. Deternine Sherwood Crossing 30-dayvolume B. Dete-Dine Rafferty Resewoir 30-day volume C. Deternine Alzmeda Reservoir 30-dayvolume D. Dete-Tine loczl Shervrood Crossing 30-day volume: 1. SubtractRafferty Reservoir 30-cay volune fr~m Sk2r-dcce Crossing 30-day volume (i.A - 1.2 = I.D.i( 2. Subtract Alameda Resenoir 30-22.y volume frcm rssult cf above (I.D.1 - 1.C = I.D.3( Based on theestimated runoff volume and ?lacs A-: deterinine what levelRafferty Reservoir shculd be arr c: below. a. if the actualreservoir level is below C." level reqired, use the actuallevel in the follcwl~q steps. b. If +&e actualreservoir level is above t5e level required,use the level shown on ?late A-1 in the followingsteps. i.E.l=I.E.2) 3. Determine if 30-dayvolume is c9ntrolled: a. if result from 2.2 above is largerthan ZO-day volume,there is no excess (I.E. 2 1.B). 5. if not, subtract E.2 amount from 30-day value, this is the RaffertyReservoir excess (1.3 - I.L.~- - I.E.3b) 4. ft Based on the estimated runoff volume and ?late x-:. determine what level Alzmeda Reservoir should. be aC c1: below. a. if theactual reservoir level is below that level required,use the actuzl level in the following szsgs. b. If the actual reservoirlevel is above the Ie~e: required, use the level shown on plate ~-3in followingsteps. 5. Subtractstarting storage from 153,710 ac-r^t {153,710 - 1.2.4 = 1.3.5) 6. Determine if 30-dayvolume is cancrolled: a. if result from E:5 above, is larger than 30-d~. volEme, there is no excess (I.E.5 i.C} L "- b. if not, subtract E.5 amourrt frcn 30-day VZlUC- his is the Blameda ReserJcir excess (I.C - A. 5.3 7. expected, the Lake Darling Dan c;erazc?r L-ST be infomed, so that Lake Darling Reservoir c=n be at f1.L~ supplylevel after flood (if (i.B - (356,400 - 1.E.l)) 0 and (i.C - (85,530 - I.E.4)) 0, then call) Crossing by adding the Rafferty Resermir and . Alaneda Resenoir excesses, if any, to the ShergoodCrcssinq local 30-day volume.foundabove (I.D.3 i I.E.3.b - 1.2.6.5 = 1.F) G. Using result from above, dete-rmine Lake Darlizq Reserqoirsta,rting level from plate A-4 (I.r" - Plate X-$ .== i.G} 3. Detenine starting Shemood Crossing tarqet flow 5y usir.~ Plate A-5 and thetotal Shemood Crossinq 30-day volume frm t*A1t above (i.A i Plate A-5 == . 1.i) I. DeternineXinot target flow by usingPlate A-5 and tke total Sherwood Crossing 30-dayvolume from IrAtr above (I.A - Plate A-6 = 1.H) J. Determine Bounda-ry Reservoir 30-dayvclume L. Deternine if Boundzry DiversionChannel will be used M. Adjust estimate of 30-dayvolume at Sheriood Czassinq 5zss.i on us2 of Boundary Reserqoirand Soundary Diversi.cn Channel 11. DURING FMO'D (Yarch 16 to May 31) A. Using data as is available from within Sash, estiazt'cl the peakdischarge to be eqected at Sheriood Crossing: 1. if discharge is less thantarget flow at Sherwccf Crossing,releases can be made from Xzff-erty 3eserJcir L,.- andAlanedz Resermir which increase che peaK tc, yc- not greaterthan, target 2. if discharge is greatsr than tzrget flcw a= ="7 She-mood Crossing, releases ar~!not to be m%Ce i- u ..I Rafferty Rese-lvoir ana Alameda ReserJoir which Xi:: add to the peak flow at SherdoodCzassi3q .. B. Shemood Crossing Tzrget (After peak at Sheraod cross in^) After the peak flow hasoccurred at Sherdood .Crzssinq, estimate theaverage daily flows expected at Sherwccd Crossing from the uncontrolledareas. Using this flow, zhe current Lake Darling Rese,Toir elevation,and the lccz1 flows at Minot,estimate future Lake Darlin5 Reservoir elevztions.Using thisdata, include to t52 Sherwcc Crossingtarget flows, make releases to drawdown Rafferty Reserroir and Alameda Reservoirwithin the tzrget flows in Plate A-5'. Plate A-9 containsstorage data for Lake Dzrlinq Reservoir to aid in the estimates. Repeatthis operation as needed to reducereservoir levsls to FSL. Note: The same starting SherdoodCrossing target flow AS'- used for the entireflood event, ,UNLESS, the estimatse 30-day volume at Shervrood Crossing is adjust& based c:: updateddata. C. To aidin the operation of ALL reservoirs ALL operatzlrs nust communicate on a reqular basis. D. Basedon reservoir levels, determine if the Minot ttrsez date of May 15 must be extended so thatthe 500 maximum at Minot after June 1 will not be exceeded. 111. POST FLOOD (June 1 toJanuary 31) A. Following the operatingguidelines, release alLowz5l-z flows to bring the reservoirs to' their FSL's. B. Review actionstaken during flood and note problens whiz:? occurred. C. If flood was a largeevent, prepare a Pcst F1md Report. 4.4 NonfloodOperation Prima-ry emphasis is given to operaticns duringyears of flccc runoff; i.e., when the spring runoff volume exceeds a 10-percer.: flood. Nonflood operationsare guided primarily by LL-.- iz Board. This OperatingPlan sets forth the understandins Setweo-r! t5.E Partiesregarding flows in nonfloodyears, and prcvides guidance c.- theimplementation of that understanding. It is recognize&, however. that the actualimplementation of the OperatingPlan will 53~ deperdent upon the close coordination of the Tszrties duzinq =>G hydrolosic year. 3.4.1. ??onflood ProjectOTeration Steps 1. The flow passed to North Dakota shall be either 40 percenc or 50 percent of the natural flow at SherdoodCrossing according ~3 the 1954 interimMeasures as modified. 2. An apportionmentbalance will be .estimatedat the sprinq meecinq of the Board. 3. If additionalreleases are needed to meet the apportionment balance, North Dakota will assess its needs. if the releases would notbe of benefit at that time, they mzy be 6elzyec7,. ' 4. if releases are delayed,they may be called for by North i)akocz at any time before . October 1. If theyare nct called iar beforeOctober 1, the water may be retained for use in Saskatchewan. 5. If delayedreleases are called for, the delayedrelease shall be measured atthe point of releaseand the delive-Ty at Shergcoc Crossingshall not be less. than the delayedrelezse minus the cmveyancelosses that wouldhave occurred under natural conditionsbetween the point of relezse and the Sherclccc Crossing. 6. On October 1, a finalapportionment ' balance will be detemined. Any portionof the NorthDakota apportionmenc ro,maining in Saskatchewan on October 1 shall be acSed arit,?metically to the storagein Lake DarlingReser-Jciz c:: October 1 to detrmine the October 1 leTrel of Lake DarLizq Reservoirfor purposes of Section4.2.a. 5.0 REPORTS Reports will be preparedeach year on behalf of the L'nitsd States andCanada by both the Saskatchewan Wztc Cor7oraticn 2r.d the U.S. Fishand Wildlife SerJice describingthe cperztisr, Of the 2roject. The repor'Ls will be issued to the 30ardana at B mir?iTizz will include a description of theoDeration of the.reser?lcirs includingany problens encountered, a siimmzzy of water levels, inflows and relezses from eachreservoir,, and an estinate c-- reservoir levels,inflows and releases for the renainder of thev.. calendar year. In anyyear in which flocd ccerationscccur, the U.S. AI-y of Zngineers will prepzre 2 pos~-flcod. r23orz. Corps. rnb- "- 2 -= report will then becjme 2 par-, of the G.S. ?ish 2nd Wil The Government of Saskatchewan, the Departnent of the A,zzy, U.S. Fish and Wildlife Service within the Departinent of the shall appoint a liaisonperson with whcm interested Provinces, and Aqencies may consult .frcm tine to time as operation of the improvements constructed and operated under :?.E terns of the subject Agreement. Representativesof the U.S. Department of the A,ny, Szskatchewan Water Conoration, U.S. Fish and Wildlife Service, ~ and the Dakota State Engineer will beresponsible for. OperatingPlan. It is eqected %bat the reserroir need to be closely monitored for the first after the project goes intooperation. 7.0 DATA .9ND C0K"NICXTION The Parties shall exchange all desireddata collscted respect to the manaqement of water in the Souris River Basin zr,c wili use their best efforts to keep all interestedStates, Provinces, and Agenciesadequately infomec', of all activitiesrelated tc this Operating Plan. -., . Y 1 TARGET DRAHrDOWX EYE!E!S - BWARYRES n b L Y 2 I IARG€T ROW AT SH3WooO I I 7 b PLATE A-8 E 0 u3 1. The Prcvince of Saskatchewan shall have the right to divert, store, and use waters which originatein the Saskatchewan porticr, of theSouris River Basin, provided that scch diversion,-stcraaa ”I anduse shall not diminish the annual flow of the river at the Sherwood Crossing more than 50 percent of that which would,have .occurredin a state ofnature, as calculated by tho- aoard. Fcr the benefit of riparian users of waterbetween the Sheriood Crossing and the upstream end of Lake Darling,the Province or’ Saskatchewanshall, so faras is practicable,requlate its diversions,storage,,and uses insuch a manner that the flow in the Souris Riverchannel at the SherdoodCrossing shall not be less than 0.113 cubic meters per second (4 cubi.c feet per secc~d) when that much flow would haveoccurred under the conditions a? water use development ‘prevailing in the SaskatchewanporTion of the SourisRiver Basin prior to canstruction of the Boundary Dan, Razferty Dam 2nd Alameda Dam. (a) Under ceeainconeitions, a portion of the XorthDakota share will be in the forn of evaporztion from Raffert‘y‘ 2.nd Alameda Xeservoirs.During years when thesecsndizions occxr, the minimum alnount of flow actuallypasse6 to North Dakota will be 40 percent of the natural flow at the Sherwood Crossing. This lesser amount is inrecognition of Saskatchewan’soperation of Rafferty Dam ar,d Alameda Dan fc\r flood cantrol. i. If thelevel cf SakeDzrling is below an elevation- cf 485.24 Deters (1592.0 feet) on Ocroker 1 in any -. calendaryear, Saskatchewan will pass 50 sercent c; =he naturzlflow at Sherwood Crossing in that year 2nd in succeedingyears until the level of Lake Darlinq is abcvean elevation of 485.55 meters (1593.0 52%:) SR Octsber 1. ... -!i (3) Flow releases to &e-UnitedStates should. occur (except in floodyears) in the pattern whichwould haveocczrred in d state of nature. To the extentpossible and in consideration of potentialchannel losses andoperating efficiencies, relelses from the Canadian dams will be scheduled to”. coincide with periods of beneficial use in North Dakott. Nonually, the period of beneficizluse in North Dakota coincides with the timing of the natural hydrograph, .end that timing shouldbe a wide to releases of the United States Fortion of the nztural. flow. The flow release to the United‘States may be delayed vhen the State of North Dakota determinesand notifies Saskatchewzn Lhrough the BoarrJ that the release would not be of’,benefit to the State at that time. The delayedrelease may be retained for usein Saskatchewan, notvithskandin$. the. minimm rel.ease lisi’ls , unless it is called far by the State of North Dakotz through the Board before October I of eachyear. The’delayed ‘release shall be measured at the point of release and the delivery at She,mood Crossingshall not be less than the delayed release minus the conveyance losses that would have occurredunder natural conditions between the point of release and the Sheriooc? Crossing. A detemination of the ’ annualapportionment balance shall be made by the Boar2 on or aboutOctober 1, of eachyear. Any shortfallthzt exists as of that date shall be delivered by Saskatchewanprior to December 31, if NorthDakota requests the delivery. 3-2