SIERRA PACIFIC RESOURCES /NV/

Q: Sep 30 2013

Q: Jun 30 2013

Q: Mar 31 2013

FY: Dec 31 2012

Q: Sep 30 2012

Q: Jun 30 2012

Q: Mar 31 2012

FY: Dec 31 2011

Q: Sep 30 2011

Q: Jun 30 2011

Q: Mar 31 2011

FY: Dec 31 2010

Q: Jun 30 2010

Q: Mar 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

FY: Dec 31 2009

Q: Sep 30 2009

8.01

2.01,3.01,3.03,5.01,5.03,9.01

8.01,9.01

1.01

2.02,7.01,9.01

8.01

5.07,8.01,9.01

1.01

8.01

5.02,9.01

8.01,9.01

8.01,9.01

2.03

8.01,9.01

2.02,7.01,9.01

8.01

8.01,9.01

Regulation FD Disclosure

Other Events

1.01,8.01,9.01

Certification of termination of registration of a class of securities (Section 12(b))

Notification of removal from listing and/or registration on a national securities exchange

Post Effective Amendment to S-8

No description available

Post Effective Amendment to S-8

Automatic Shelf Registration

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post Effective Amendment to S-8

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post Effective Amendment to S-8

Notification of removal from listing and/or registration on a national securities exchange

Prospectus Supplement for Delayed or Continuous Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Automatic Shelf Registration

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Prospectus Supplement for Primary Offering

No description available

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

none

none

CHRISTENSON GLENN C

COBB ALICE A

DENIS ROBERTO R

FRANK STEPHEN E

Geraghty Kevin

Halkyard Jonathan S

KALETA PAUL J

KENNEDY BRIAN J

MULLARKEY MAUREEN T

OREILLY JOHN F

SATRE PHILIP G

SNYDER DONALD D

STEWART ROBERT E JR

YACKIRA MICHAEL W

ANDERSON JOSEPH B JR

ANDERSON JOSEPH B JR

BETHEL E KEVIN

CLARK SUSAN F

Post-effective amendment to an automatic shelf registration statement

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

No description available

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Post-effective amendment to an automatic shelf registration statement