Customer fund program update Gary Hinkle Omaha Maintenance Engineering & Mgmt Support Chief 13 June 2017

Fiscal year 2016 statistics and performance by facility Generation Plant O&M Costs Forced Outage Scheduled Outage Availability   No. of Units Nameplate Capacity (MW) % of NWO Capacity Net Generation (MWh) O&M Cost ($/MWh) O&M Cost ($/MW) Total No. Hours Unavail Factor (%) Yearly Hours Hours Avail Fort Peck 5 185.3 7.4% 785,506 $8.96 $37,993 580 1.3% 8 11,112 25.3% 43,920 32,228 73.4% Garrison 583.3 23.3% 1,913,683 $5.64 $18,494 16 170 .4% 5,802 13.2% 37,948 86.4% Oahe 7 786.0 31.4% 2,049,195 $3.87 $10,095 11 216 29 9,113 14.8% 61,488 52,159 84.8% Big Bend 494.3 19.8% 746,571 $11.87 $17,920 9 1,081 1.5% 46 3,185 4.5% 70,272 66,006 93.9% Fort Randall 320.0 12.8% 1,460,965 $4.51 $20,595 36 123 .2% 15 11,586 16.5% 58,563 83.3% Gavins Point 3 132.3 5.3% 694,260 $7.70 $40,837 0% 13 2673 10.1% 26,352 23,679 89.9% Total/Average 2,501.2 100.0% 7,650,180 $6.09 $18,612 77 2,170 .7% 127 43,470 13.6% 315,360 270,584 85.6%

Hydropower Master plan Website: http://www.nwo.usace.army.mil/Missions/ Dam-and-Lake-Projects/Hydropower/

Project Status Report Top Initiatives FR Oil Fill Cable Modification WSPC internal exhibits 3rd Qtr Awards A/E IDIQ Program Obligations/Expenditures Authorized: $163M $79M Obligated/$53M Expended FY Obligations: FY14: $8.7M FY15: $28.0M FY16: $22.2M FY17 Queued Contract Obligations To Date: 3 Award/$3.5M 3rd Qtr: 7 Awards/$14.5M 4th Qtr: 3 Award/$7.3M Total: $25.3M Current Workload & Execution Status Projects Design Acquisition Construction Fort Peck 13 6 7 Garrison 3 Oahe 9 4 2 Big Bend 1 Fort Randall 8 Gavins Point Multi-Plants Total 46 19

Fort Randall Current work New Bridge Crane Rehabilitate bridge cranes Complete: June 2017 Switchyard upgrade Complete: Jun 2018 Replace exterior station service equipment Complete: Mar 2018 Replace oil-filled cable Replace generator relays Purchase and install unwatering valves Upgrade station service switchgear and transformers Complete: Dec 2018

Switchyard upgrade & Replace exterior station service equipment New Switchyard Breakers Failed SS Service Equipment

replace oil filled cable, Replace generator relays, & Install Unwatering Valves New & Old Generator Relays New Unwatering Valve New Oil Filled Cable

Closeout/Remaining Funds Fort Randall # ID PROJECT TITLE Authorized $$ PH STA PM BOD Q3 Q4 Q1 Q2 FY17 FY18    1 399807/505 Rehab bridge cranes $3,199,997 C G JP 1/18 F 2 455996/564 Rehab 13.8kV outdoor SS equipment $810,000 10/18 3 399806/504 Oil filled cable replacement $16,674,112 A 9/18 4 449297/547 Purchase & install unwatering valves $1,100,000 11/17 5 Multiple Upgrade switchyard $15,450,000 2/18 6 406244/521 Replace generator relays $500,000 MK 3/18 463086/601 Replace programmable logic controllers $1,000,000  AW 6/19 7 449300/542 456029/566 Upgrade station service switchgear & Replace Station Service Transformers $3,220,000 D 456036/565 Replace powerhouse PT & CTs $195,000 LB 12/18 8 461738/ 595 & 596 Major unit rehab $24,656,334 12/31 S FY18 DSG Digital Governors FY18 AWD Install High Resistance Grounding Replace draft tube stop logs/intake gate PHASE STATUS Projects DSG ACQ CNS G A R 8 2 6 7 1 FINANCIAL Authorized Obligations Expenditures Available $67.2M $32.3M $23.6M $31.5M OA Amber: Thrust Bearing Cooler Repair & GSU Transformer Bushing Repair, PT/CT FY16: 1 project closed out 1 Project awarded FY17: 1 Closeout Complete Oil Containment & Possibly Thrust Bearing Cooler Repair Award: PLC Supply, PT & CTs, Exciters, & Bridge Crane Purchase: GSU bushings 3 New Projects Closeout/Remaining Funds LEGEND 449299/541 Generator step up transformers 125884/476 MRER validation study 399807/505 Rehab bridge cranes PH= Phase, STA= Status, PM = Project Manager D=Design, A=Acquisition, C=Installation/Construction, F=Closeout

Fort Randall Unit Rehab Update Project Objectives: Improve Reliability Increase Turbine Efficiency Optimize Unit Capacity Acquisition Strategy: Conduct sources sought Conduct pre-design industry day Acquisition plan development 4 Contract Actions Rotor spider evaluation (study phase) Hazardous Material Abatement Evaluation (Study Phase) Contract Phase Supply of Generator Step-Up Transformers Main unit rehabilitations includes all generator and turbine work

Rewind Restack Generators & replace turbines ID Description Authorized Funding FY18 Request Total Funding End of FY18 Total Estimate Program Costs Funding Still Required 1 Study, design, develop specifications $3,000,000 $0 2 Rewind Generators $44,156,000 $8,844,000 $53,000,000   Rewind stator Reinsulate field windings Replace stator core 3 Replace Turbines $23,000,000 $159,000,000 $136,000,000 Install turbine maintenance platform Furnish turbine Install turbine runners Modify thrust/guide bearings Replace wicket gates Gates/servos/packing box Refurbish head cover stay ring Miscellaneous system repair 4 Supply and install transformers $15,256,000 $15,256 $25,000,000 $9,744,000 Total $47,362,000 $47,100,000 $94,256,000 $240,000,000 $145,744,000

Study Phase

Biofouling Invasive Species –Gavins Point Dam 2016

Biofouling Invasive Species – Lewis & Clark Lake 2016

Biofouling– Gavins Point Dam 2017