Information relative to IPL’s and WPL’s ownership interest in these jointly-owned EGUs at December 31, 2022 was as follows (dollars in millions):


	Ownership	Electric	Accumulated Provision	Construction
	Interest %	Plant	for Depreciation	Work in Progress
IPL
Ottumwa Unit 1	48.0%	$612	$241	$17
George Neal Unit 4	25.7%	193	103	4
George Neal Unit 3	28.0%	176	80	6
Louisa Unit 1	4.0%	43	21	—
		1,024	445	27
WPL
Columbia Units 1-2	53.5%	805	338	13
West Riverside Energy Center and Solar Facility	91.0%	716	53	2
Forward Wind Energy Center	42.6%	118	50	—
		1,639	441	15
Alliant Energy		$2,663	$886	$42

Information relative to IPL’s and WPL’s ownership interest in these jointly-owned EGUs at December 31, 2022 was as follows (dollars in millions):


	Ownership	Electric	Accumulated Provision	Construction
	Interest %	Plant	for Depreciation	Work in Progress
IPL
Ottumwa Unit 1	48.0%	$612	$241	$17
George Neal Unit 4	25.7%	193	103	4
George Neal Unit 3	28.0%	176	80	6
Louisa Unit 1	4.0%	43	21	—
		1,024	445	27
WPL
Columbia Units 1-2	53.5%	805	338	13
West Riverside Energy Center and Solar Facility	91.0%	716	53	2
Forward Wind Energy Center	42.6%	118	50	—
		1,639	441	15
Alliant Energy		$2,663	$886	$42