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Note 3 - Rate and Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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 –

December 27, 2019

January 1, 2020

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

2015 Incentive and Cost Recovery

A –

July 19, 2016

October 1, 2016

8,590

$0.00275

/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

2016 Annual Update

A –

July 5, 2016

September 1, 2016

4,736

Various

Environmental Cost Recovery

2018 Annual Update

A –

November 29, 2018

December 1, 2018

of base

2017 Rate Reset

A –

October 30, 2017

November 1, 2017

(1,943

)

-0.935%

of base

2016 Annual Update

A –

July 5, 2016

September 1, 2016

11,884

6.927%

of base

Renewable Resource Adjustment

2019 Annual Update – Revised

A –

December 19, 2019

January 1, 2020

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

2020 Annual Update

R –

December 31, 2019

April 1, 2020

3,828

3.744%

of base

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

2016 Annual Update

A –

March 15, 2017

April 1, 2017

9,156

7.005%

of base

2015 Annual Update

A –

June 22, 2016

July 1, 2016

9,262

7.573%

of base

Transmission Cost Recovery

2019 Annual Update

A –

December 18, 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

2016 Annual Update

A –

December 14, 2016

January 1, 2017

6,916

Various

Environmental Cost Recovery

2019 Update

A –

October 22, 2019

November 1, 2019

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

2017 Annual Update

A –

July 12, 2017

August 1, 2017

9,917

7.633%

of base

2016 Annual Update

A –

June 22, 2016

July 1, 2016

10,359

7.904%

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

2020 Annual Update

R –

October 31, 2019

March 1, 2020

2,407

Various

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

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

2015 Annual Update

A –

February 12, 2016

March 1, 2016

1,895

Various

Environmental Cost Recovery

2018 Interim Rate Reset

A –

October 18, 2018

(189

)

-$0.00075

/kwh

2017 Annual Update

A –

October 13, 2017

November 1, 2017

2,082

$0.00483

/kwh

2016 Annual Update

A –

October 26, 2016

November 1, 2016

2,238

$0.00536

/kwh

Phase-In Rate Plan Recovery

2019 Initial Request

A –

August 21, 2019

September 1, 2019

864

3.345%

of base

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

Rate Rider (in thousands)	2019			2018			2017
Minnesota
Conservation Improvement Program Costs and Incentives	$	8,271		$	8,127		$	6,008
Renewable Resource Adjustment		5,513			3,067			(196	)
Transmission Cost Recovery		2,497			(2,039	)		2,973
Environmental Cost Recovery		(1	)		(24	)		8,148
North Dakota
Transmission Cost Recovery		5,292			7,016			8,729
Generation Cost Recovery		878			-			-
Environmental Cost Recovery		550			7,318			9,782
Renewable Resource Adjustment		230			8,529			7,620
South Dakota
Transmission Cost Recovery		2,165			1,664			1,843
Conservation Improvement Program Costs and Incentives		851			628			598
Environmental Cost Recovery		(29	)		1,676			2,345
Phase-In Rate Plan		(125	)		-			-
Total	$	26,092		$	35,962		$	47,850