Note 3 - Rate and Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

Schedule of Revenues Recorded under Rate Riders [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
Rate Rider (in thousands)	2019			2018			2019			2018
Minnesota
Conservation Improvement Program Costs and Incentives	$	1,518		$	1,488		$	4,246		$	4,300
Renewable Resource Recovery		1,316			817			3,949			2,001
Transmission Cost Recovery		(284	)		(1,196	)		301			(1,683	)
Environmental Cost Recovery		-			24			(1	)		(25	)
North Dakota
Transmission Cost Recovery		908			1,922			3,554			5,149
Renewable Resource Adjustment		(20	)		2,220			616			6,266
Generation Cost Recovery		137			-			607			-
Environmental Cost Recovery		(7	)		1,823			556			5,474
South Dakota
Transmission Cost Recovery		743			496			1,587			1,282
Conservation Improvement Program Costs and Incentives		100			238			440			589
Phase-In Rate Plan Recovery		(10	)		-			(10	)		-
Environmental Cost Recovery		(2	)		545			(29	)		1,580
Total	$	4,399		$	8,377		$	15,816		$	24,933

Schedule of Information on Status of Updates for Previous Periods [Table Text Block]

Rate Rider	R - Request Date A - Approval Date		Effective Date Requested or Approved	Annual Revenue ($000s)			Rate
Minnesota
Conservation Improvement Program
2018 Incentive and Cost Recovery	A –	October 24, 2019	December 1, 2019	$	11,926		$0.00710	/kwh
2017 Incentive and Cost Recovery	A –	October 4, 2018	November 1, 2018	$	10,283		$0.00600	/kwh
2016 Incentive and Cost Recovery	A –	September 15, 2017	October 1, 2017	$	9,868		$0.00536	/kwh
Transmission Cost Recovery
2018 Annual Update–Scenario A	R –	November 30, 2018	June 1, 2019	$	6,475		Various
–Scenario B				$	2,708		Various
2017 Rate Reset	A –	October 30, 2017	November 1, 2017	$	(3,311	)	Various
Environmental Cost Recovery
2018 Annual Update	A –	November 29, 2018	December 1, 2018	$	-		0%	of base
2017 Rate Reset	A –	October 30, 2017	November 1, 2017	$	(1,943	)	-0.935%	of base
Renewable Resource Adjustment
2019 Annual Update – Revised	R –	September 30, 2019	November 1, 2019	$	12,506		$0.00467	/kwh
2018 Annual Update	A –	August 29, 2018	November 1, 2018	$	5,886		$0.00219	/kwh
2017 Rate Reset	A –	October 30, 2017	November 1, 2017	$	1,279		$0.00049	/kwh
North Dakota
Renewable Resource Adjustment
2019 Annual Update	A –	May 1, 2019	June 1, 2019	$	(235	)	-0.224%	of base
2018 Rate Reset for effect of TCJA	A –	February 27, 2018	March 1, 2018	$	9,650		7.493%	of base
2017 Rate Reset	A –	December 20, 2017	January 1, 2018	$	9,989		7.756%	of base
Transmission Cost Recovery
2019 Annual Update	R –	August 30, 2019	January 1, 2020	$	5,739		Various
2018 Supplemental Update	A –	December 6, 2018	February 1, 2019	$	4,801		Various
2018 Rate Reset for effect of TCJA	A –	February 27, 2018	March 1, 2018	$	7,469		Various
2017 Annual Update	A –	November 29, 2017	January 1, 2018	$	7,959		Various
Environmental Cost Recovery
2019 Update	A –	October 22, 2019	November 1, 2019	$	-		0%	of base
2018 Update	A –	December 19, 2018	February 1, 2019	$	(378	)	-0.310%	of base
2018 Rate Reset for effect of TCJA	A –	February 27, 2018	March 1, 2018	$	7,718		5.593%	of base
2017 Rate Reset	A –	December 20, 2017	January 1, 2018	$	8,537		6.629%	of base
Generation Cost Recovery
2019 Initial Request	A –	May 15, 2019	July 1, 2019	$	2,720		2.547%	of base
South Dakota
Transmission Cost Recovery
2019 Rate Reset	A –	September 17, 2019	October 1, 2019	$	2,046		Various
2019 Annual Update	A –	February 20, 2019	March 1, 2019	$	1,638		Various
2018 Interim Rate Reset	A –	October 18, 2018	October 18, 2018	$	1,171		Various
2017 Annual Update	A –	February 28, 2018	March 1, 2018	$	1,779		Various
2016 Annual Update	A –	February 17, 2017	March 1, 2017	$	2,053		Various
Environmental Cost Recovery
2018 Interim Rate Reset	A –	October 18, 2018	October 18, 2018	$	(189	)	-$0.00075	/kwh
2017 Annual Update	A –	October 13, 2017	November 1, 2017	$	2,082		$0.00483	/kwh
Phase-In Rate Plan Recovery
2019 Initial Request	A –	August 21, 2019	September 1, 2019	$	864		3.345%	of base