TEMPORARY OPERATING INSTRUCTION No. 15-269 15-00774 15-00117 15-11259 15-00085 1-09573810 15-00118 O.O. MISO No 1-09472767 File No. 240801 15-00119 1-09472769 15-00087 15-00362 15-00120 15-00121 Generator 2 Running (Selkirk G.S.) 115 kV Bus Section 2 & 3 - (Seven Sisters G.S.) 115 - 2.3kV Station Service Bank 7 - (Seven Sisters G.S.) Generator 1 - (Seven Sisters G.S.) Abnormal Generator 2 - (Seven Sisters G.S.) Operating Condition: Generator 3 - (Seven Sisters G.S.) 115 kV Line SG12 (Seven Sisters – Beausejour East) 115 kV Line SR3 (Seven Sisters – McArthur Falls) 115 kV Line SW2 (Seven Sisters – Whiteshell) 115 kV Line SW3 (Seven Sisters – Whiteshell) 2015-11-18 from 1000 to 2015-11-18 at 1400 CST Effective Dates: (2015-11-18 from 1100 to 2015-11-18 at 1500 EST) Standing Guide Reference: MH Study as per L. Ruchkall

Description of Work: Seven Sisters – Black Start Testing. Selkirk G.S. – Generator 2 Running

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Special Instructions Export: If RTCA indicates that the loss of SW1 will cause overloads on SW4, to MHEB Operator: and vice versa, transfer from IESO may need to be curtailed.

Import: If RTCA indicates that the loss of ST5 or ST6 will cause overloads on WT34, transfer from IESO may need to be curtailed.

MISO North RC MH_ONT_E (Export) SOL = 196 MW Notes: MH_ONT_W (Import) SOL = 225 MW

Special Instructions: TOI Extensions - This TOI may be extended until 23:59, by performing the following steps.

a) Verify system conditions to confirm there are no additional tie line facilities outages, or new internal MH outages. b) Review RTCA to confirm there are no new contingencies. c) Contact MISO to confirm there are no new outages, if there are no new outages provide notice to MISO that MH is extending the TOI. d) Extend the outage in COLA e) Update TLAP outage table f) Provide notice to affected balancing authorities

Prepared By: S. Brooks Date: 2015 11 12

Copies to: SOSS, System Control Centre NSSS, System Control Centre 2 TEMPORARY OPERATING INSTRUCTION No. 15-269 GSSS, System Control Centre GSO, System Control Centre Operating Order Ontario IESO MISO – St. Paul MHEB OASIS File 240801

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