Xcel Energy

1. Xcel Energy Projects From 2008 Reliability Assessment

2. Douglas Co 2nd Transformer: • Low voltages in the region for the loss of Douglas Co transformer. • Install a 2nd Douglas Co 115/ 69 kV transformer. • Planned inservice date is ~ 2011

3. Monticello Transformer Upgrade: • Loss of Sherco – Benton 345 kV line overloads Monticello 345/230 kV transformer. • Upgrade the existing transformer to 550 MVA. • Inservice date ~ 2011.

4. Sioux Falls Area Upgrades • Add second 112 MVA transformer at Lawrence • ISD – 12/1/2012 • Split dbl ckt 115 kV line from Split Rock-Cherry Creek/West Sioux Falls • ISD – 6/1/2011 • Solves low voltages and transformer overloads

5. South Minneapolis Electric Reliability Project (SMERP) To Lexington New HWY 280 345/ 115kV sub 2013 2-672 MVA @ Parkers Lake 2015 115 kV line 2013 Open Elliot Park-Hiawatha line 2013-2020 345 kV line 2013-2020 New Hiawatha sub 2010 and Midtown sub 2010 New Crosstown sub 2014 Dbl ckt 115 kV line 2014 2-672 MVA @ Red Rock 2013 2-672 MVA @ Eden Prairie 2014

6. Cannon Falls Area Upgrades • Loss of either Cannon Falls transformer overloads the other transformer. • Add a 115/69kV 112MVA transformer at Colville substation. • Reroute Cannon Falls-Byllesby 69kV line to Colville-Byllesby. • Replace bus tie breaker with a breaker ring bus at Cannon Falls. • ISD – 6/1/2012