Exhibit 21.1

WISCONSIN ENERGY CORPORATION

SUBSIDIARIES AS OF DECEMBER 31, 2006

The following table includes the subsidiaries of Wisconsin Energy Corporation, a diversified holding company incorporated in the state of Wisconsin, as well as the percent of ownership, as of December 31, 2006:

Subsidiary (a)		State of Incorporation or Organization	Percent Ownership
Wisconsin Electric Power Company		Wisconsin	100%
	ATC Management Inc.	Wisconsin	29.41%
	American Transmission Company LLC	Wisconsin	25.81%
	Bostco LLC	Wisconsin	100%
	Blue Sky Wind Farm, LLC	Minnesota	100%
	Green Field Wind Farm, LLC	Minnesota	100%
	Lake Breeze Wind Farm, LLC	Wisconsin	100%
Wisconsin Gas LLC		Wisconsin	100%
Edison Sault Electric Company		Michigan	100%
	American Transmission Company LLC	Wisconsin	3.59%
W.E. Power, LLC		Wisconsin	100%
	Elm Road Generating Station Supercritical, LLC	Wisconsin	100%
	Elm Road Services, LLC	Wisconsin	100%
	Port Washington Generating Station, LLC	Wisconsin	100%
WEC Nuclear Corporation		Wisconsin	100%
	Nuclear Management Company, LLC	Wisconsin	33.33%
WISVEST Corporation		Wisconsin	100%
	CET Two, LLC	Delaware	100%
Minergy Corp.		Wisconsin	100%
	GlassPack, LLC	Wisconsin	100%
WISPARK LLC		Wisconsin	100%
	CenterPoint Wispark Land Company LLC	Wisconsin	35.83%
Wisconsin Energy Capital Corporation		Wisconsin	100%
	Riverfront Power LLC	Wisconsin	99%

(a) Omits the names of certain subsidiaries, which if considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary” as of December 31, 2006. Indirectly owned subsidiaries are listed under the subsidiaries through which Wisconsin Energy Corporation holds ownership.