Supreme Court of the United States · Official docket →
Texas, Plaintiff v. New Mexico and Colorado
Original jurisdiction
Decree entered · May 26, 2026
Counsel of record
For petitioner
—
For respondent
Chad Matthew Wallace
Case
Conference history
Distributed for 18 conferences
Amicus briefs
5 cert-stage · 17 merits
(17 supporting pet./neither)
Argument & decision
Argued January 8, 2018 — Ann O'Connell · Scott A. Keller · Frederick R. Yarger · Marcus J. Rael. Audio and transcript
Decided March 5, 2018. Opinion by Gorsuch.
Proceedings
- Jun 08 2026The United States' claims in this case are hereby dismissed with prejudice.
- May 26 2026The proposed final decree, Appendix A to the Fourth Interim Report of the Special Master, is entered. The Honorable D. Brooks Smith, of Duncansville, Pennsylvania, the Special Master in this case, is hereby discharged with the thanks of the Court.
- May 05 2026DISTRIBUTED for Conference of 5/21/2026.
- Mar 02 2026The Fourth Interim Report of the Special Master is received and ordered filed. Exceptions to the Report, with supporting briefs, may be filed within 45 days. Replies, if any, with supporting briefs, may be filed within 30 days. Sur-replies, if any, with supporting briefs, may be filed within 30 days.
- Feb 11 2026DISTRIBUTED for Conference of 2/27/2026.
- Feb 06 2026Fourth Interim Report of the Special Master received.
- Jul 17 2024The Honorable Michael J. Melloy, of Cedar Rapids, Iowa, the Special Master in this case, is hereby discharged with the thanks of the Court. It is ordered that the Honorable D. Brooks Smith, of Duncansville, Pennsylvania, is appointed Special Master in this case with authority to fix the time and condition for proceedings, to summon witnesses, to issue subpoenas, and to take such evidence as may be introduced and such as he may deem it necessary to call for. The Special Master is directed to submit reports as he may deem appropriate. The cost of printing his reports, and all other proper expenses, including travel expenses, shall be submitted to the Court.
- Jun 21 2024EXCEPTION SUSTAINED. Jackson, J., delivered the opinion of the Court, in which Roberts, C. J., and Sotomayor, Kagan, and Kavanaugh, JJ., joined. Gorsuch, J., filed a dissenting opinion, in which Thomas, Alito, and Barrett, JJ., joined.
- Mar 20 2024Argued. For United States: Frederick Liu, Assistant to the Solicitor General, Department of Justice, Washington, D. C. For Texas: Lanora C. Pettit, Principal Deputy Solicitor General, Austin, Tex. For New Mexico: Jeffrey J. Wechsler, Santa Fe, N. M.
- Feb 20 2024Motion for divided argument filed by Texas and New Mexico GRANTED.
- Feb 07 2024Motion for divided argument filed by Texas and New Mexico.
- Jan 29 2024SET FOR ARGUMENT on Wednesday, March 20, 2024.
- Jan 22 2024The exception to the Third Interim Report of the Special Master is set for oral argument in due course.
- Jan 03 2024DISTRIBUTED for Conference of 1/19/2024.
- Jan 03 2024Sur-reply of the United States filed.
- Dec 11 2023Brief amicus curiae of Albuquerque Bernalillo County Water Utility Authority, et al. filed.
- Dec 11 2023Brief amicus curiae of water law professors filed.
- Dec 11 2023Brief amicus curiae of Utah, et al. filed.
- Dec 08 2023Brief amicus curiae of New Mexico State University, et al. filed.
- Dec 07 2023Brief amicus curiae of New Mexico Pecan Growers, et al. filed.
- Dec 04 2023Joint reply to exception of the United States by Texas, New Mexico, and Colorado filed.
- Oct 13 2023Brief amicus curiae of Elephant Butte Irrigation District filed.
- Oct 13 2023Brief amicus curiae of El Paso County Water Improvement District No. 1 filed.
- Oct 06 2023Exception of the United States and brief for the United States in support of exception filed.
- Oct 06 2023Joint notice that Texas, New Mexico and Colorado have no exceptions to the Third Interim Report of the Special Master filed.
- Sep 06 2023The revised joint motion for an extension is granted. Exceptions to the Third Interim Report of the Special Master, with supporting briefs, may be filed by October 6, 2023. Replies, if any, with supporting briefs, may be filed by December 4, 2023. Sur-replies, if any, with supporting briefs, may be filed by January 3, 2024.
- Sep 05 2023Revised joint motion for an extension of time filed.
- Aug 31 2023Joint motion for an extension of time filed.
- Jul 24 2023The Third Interim Report of the Special Master is received and ordered filed. Exceptions to the Report, with supporting briefs, may be filed within 45 days. Replies, if any, with supporting briefs, may be filed within 30 days. Sur-replies, if any, with supporting briefs, may be filed within 30 days.
- Jul 03 2023Third Interim Report of the Special Master received.
- Jan 13 2020The Second Interim Report of the Special Master on the motion of Nathan Boyd Estate, et al. for leave to intervene is received and ordered filed. The motion of Nathan Boyd Estate, et al. for leave to intervene is denied.
- Dec 18 2019DISTRIBUTED for Conference of 1/10/2020.
- Dec 03 2019Second Interim Report of the Special Master received.
- Jun 17 2019Motion for leave to intervene filed by Nathan Boyd Estate, et al. referred to the Special Master.
- Jun 10 2019Letter withdrawing application (18A1271) to to file a reply in excess of the word limit received.
- Jun 07 2019Reply of Nathan Boyd Estate, et al. filed.
- Jun 05 2019Application (18A1271) to file a reply in excess of the word limit, submitted to Justice Alito.
- May 28 2019DISTRIBUTED for Conference of 6/13/2019.
- May 20 2019Brief for the United States in Opposition to the Motion for Leave to Intervene of the Nathan Boyd Estate, et al. filed.
- Apr 26 2019Motion to extend the time to file reply in support of motion for leave to intervene is granted, and the time is extended to June 10, 2019.
- Apr 23 2019Motion to extend the time to file reply in support of motion for leave to intervene to June 10, 2019, submitted to the Clerk.
- Apr 19 2019Motion to extend the time to file response to the motion for leave to intervene from April 19, 2019 to May 20, 2019, submitted to The Clerk.
- Apr 19 2019Motion to extend the time to file response to the motion for leave to intervene is granted and the time is extended to and including May 20, 2019.
- Apr 19 2019Response to motion for leave to intervene from respondent Colorado filed.
- Apr 19 2019Response to motion for leave to intervene from respondent New Mexico filed.
- Apr 18 2019Response to motion for leave to intervene from petitioner Texas filed.
- Mar 27 2019Motion to extend the time to file responses to the motion for leave to intervene is granted and the time is extended to and including April 19, 2019, for all parties.
- Mar 22 2019Motion to extend the time to file responses to the motion for leave to intervene from April 1, 2019 to April 19, 2019, submitted to The Clerk.
- Mar 20 2019Motion for leave to intervene filed by Nathan Boyd Estate, et al.
- Jul 23 2018Answer of United States to New Mexico's counterclaims filed with the Special Master July 23, 2018, received by the Court July 23, 2018.
- Jul 20 2018Answer of Texas to New Mexico's Counterclaims filed with the Special Master July 20, 2018, received by the Court July 24, 2018.
- May 23 2018Answer of New Mexico to Texas Complaint filed with Special Master May 23, 2018, received by the Court May 30, 2018.
- May 23 2018Answer of New Mexico to United States Complaint filed with Special Master May 23, 2018, received by the Court May 30, 2018.
- May 23 2018New Mexico Counterclaims filed with the Special Master May 23, 2018, received by the Court May 30, 2018.
- May 14 2018The final motion of the former Special Master for allowance of fees and disbursements is GRANTED, and the former Special Master is awarded a total of $10,101.86, for the period March 13, 2017, through April 2, 2018, to be paid as follows: 37.5% by Texas, 37.5% by New Mexico, 20% by the United States, and 5% by Colorado.
- Apr 24 2018DISTRIBUTED for Conference of 5/10/2018.
- Apr 17 2018Final Motion of the former Special Master for allowance of fees and disbursements.
- Apr 06 2018Oath received from Special Master
- Apr 02 2018A. Gregory Grimsal, Esq., of New Orleans, Louisiana, the Special Master in this case, is hereby discharged with the thanks of the Court. It is ordered that the Honorable Michael J. Melloy, of Cedar Rapids, Iowa, is appointed Special Master in this case with authority to fix the time and conditions for the filing of additional pleadings, to direct subsequent proceedings, to summon witnesses, to issue subpoenas, and to take such evidence as may be introduced and such as he may deem it necessary to call for. The Special Master is directed to submit Reports as he may deem appropriate. The cost of printing his Reports, and all other proper expenses, including travel expenses, shall be submitted to the Court.
- Mar 05 2018United States's exception sustained; all other exceptions overruled; and case remanded. Gorsuch, J., delivered the opinion for a unanimous Court.
- Jan 08 2018Argued. For United States, as intervenor: Ann O'Connell, Assistant to the Solicitor General, Department of Justice, Washington, D. C. For plaintiff: Scott A. Keller, Solicitor General of Texas, Austin, Texas. For defendant Colorado: Frederick R. Yarger, Solicitor General of Colorado, Denver, Colo. For defendant New Mexico: Marcus J. Rael, Jr., Albuquerque, N. M.
- Dec 11 2017Motion for divided argument filed by the Solicitor General GRANTED.
- Nov 17 2017SET FOR ARGUMENT ON Monday, January 8, 2018
- Nov 17 2017Motion for divided argument filed by the United States.
- Oct 10 2017Motion for leave to file amicus brief filed by New Mexico State University GRANTED.
- Oct 10 2017Motion for leave to file amicus brief filed by New Mexico Pecan Growers GRANTED.
- Oct 10 2017New Mexico's motion to dismiss Texas's complaint is DENIED.
- Oct 10 2017The motion of Elephant Butte Irrigation District for leave to intervene is DENIED.
- Oct 10 2017The motion of El Paso County Water Improvement District No. 1 for leave to intervene is DENIED.
- Oct 10 2017The exception of the United States and the first exception of Colorado to the First Interim Report of the Special Master (Feb. 13, 2017) are set for oral argument in due course.
- Sep 01 2017Sur Reply for the United States filed.
- Sep 01 2017New Mexico's Sur Reply filed.
- Sep 01 2017Colorado's Sur Reply filed.
- Aug 31 2017Texas's Sur Reply filed.
- Aug 04 2017Brief amicus curiae of Kansas filed.
- Jul 28 2017Reply of United States to the exceptions of the report of the Special Master filed.
- Jul 28 2017Reply of New Mexico to the exceptions to the report of the Special Master filed.
- Jul 28 2017Reply of Colorado to the exceptions to the report of the Special Master filed.
- Jul 28 2017Reply of Texas to the exceptions to the report of the Special Master filed.
- Jul 28 2017Brief amicus curiae of El Paso County Water Improvement District No. 1 filed. (corrected)
- Jul 28 2017Brief amicus curiae of City of El Paso, TX filed.
- Jul 28 2017Brief amicus curiae of Elephant Butte Irrigation District filed.
- Jun 20 2017Letter from the Acting Solicitor General proposing to lodge non-record material with the Court.
- Jun 09 2017Exception of the United States and Brief in support of Exception filed.
- Jun 09 2017Exceptions to the First Interim Report of the Special Master filed by Colorado
- Jun 09 2017Exceptions to the First Interim Report of the Special Master filed by New Mexico.
- Jun 09 2017Brief amicus curiae of Albuquerque Bernalillo County Water Utility Authority filed.
- Jun 09 2017Brief amicus curiae of City of Las Cruces filed.
- Jun 09 2017Motion for leave to file amicus brief filed by New Mexico Pecan Growers.
- Jun 09 2017Motion for leave to file amicus brief filed by New Mexico State University.
- May 22 2017The Third Interim Motion of the Special Master for Allowance of Fees and Disbursements, as amended by his letter dated May 17, 2017, is GRANTED, and the Special Master is awarded a total of $219,125.57, for the period November 2, 2015, through March 13, 2017, to be paid as follows: 37.5% by Texas, 37.5% by New Mexico, 20% by the United States and 5% by Colorado.
- Mar 31 2017The March 30, 2017, joint request for an extension of time has been granted as follows: Exceptions to the Special Masters Report are due on or before June 9, 2017; Replies are due on or before July 28, 2017; Sur-replies are due on or before September 1, 2017.
- Mar 20 2017The Report of the Special Master is received and ordered filed. Exceptions to the Report, with supporting briefs, may be filed within 45 days. Replies, if any, with supporting briefs, may be filed within 30 days. Sur-replies, if any, with supporting briefs, may be filed within 30 days.
- Mar 13 2017Third Interim Motion of the Special Master for Allowance of Fees and Disbursements filed by Special Master.
- Mar 01 2017Special Master Report DISTRIBUTED for Conference of March 17, 2017.
- Feb 13 2017First Interim Report of the Special Master received.
- May 31 2016The Second Interim Motion of the Special Master for Allowance of Fees and Disbursements, as amended by his letter dated May 20, 2016, is GRANTED, and the Special Master is awarded a total of $200,000.00, for the period May 1, 2015, through October 31, 2015, to be paid as follows: 37.5% by Texas, 37.5% by New Mexico, 20% by the United States and 5% by Colorado.
- May 20 2016Rescheduled.
- May 20 2016Letter from Special Master regarding fees received.
- May 17 2016Motion DISTRIBUTED for Conference of May 19, 2016.
- Nov 23 2015Motion DISTRIBUTED for Conference of December 11, 2015.
- Nov 18 2015Motion for Extension of time to file comments regarding the Second Interim Motion for fees GRANTED to and until November 20, 2015.
- Nov 12 2015Motion for Extension of time to file comments regarding the Second Interim Motion for fees filed by respondent New Mexico.
- Nov 02 2015Second Interim Motion of the Special Master for Allowance of Fees and Disbursements filed by Special Master.
- Oct 05 2015Motion for leave to intervene filed by El Paso County Water Improvement District No. 1 referred to the Special Master.
- Oct 05 2015The First Interim motion of the Special Master for allowance of fees and disbursements is granted, and the Special Master is awarded a total of $195,461.53 for the period November 3, 2014, through April 30, 2015, to be paid as follows: 37.5% by Texas, 37.5% by New Mexico, 20% by the United States and 5% by Colorado.
- Jul 15 2015Motion of El Paso County Water Improvement District No. 1 for leave to intervene DISTRIBUTED for Conference of September 28, 2015.
- Jul 15 2015Motion of the Special Master for Allowance of Fees and Disbursements. DISTRIBUTED for Conference of September 28, 2015.
- Jul 10 2015Reply in Support of Motion of El Paso County Water Improvement District No. 1 for leave to intervene filed by El Paso County Water Improvement District No. 1 .
- Jun 17 2015Motion DISTRIBUTED for Conference of September 28, 2015.
- Jun 10 2015Brief of United States in opposition to El Paso County Water Improvement District No. 1's motion for leave to intervene filed.
- Jun 10 2015Brief in response to El Paso County Water Improvement District No. 1's motion for leave to intervene of Texas, Plaintiff filed.
- Jun 10 2015Response in opposition to motion of El Paso County Water Improvement District No. 1 for leave to intervene by respondent New Mexico filed.
- Jun 10 2015Response to El Paso County Water Improvement District No. 1's motion for leave to intervene from respondent Colorado filed.
- May 26 2015Order extending time to file a response to the Special Master's motion for Allowance of Fees and Disbursements to and including June 12, 2015 for all parties.
- May 19 2015Motion DISTRIBUTED for Conference of June 4, 2015.
- May 06 2015First Interim Motion of the Special Master for Allowance of Fees and Disbursements filed by Special Master.
- Apr 27 2015Motion for leave to intervene filed by Elephant Butte Irrigation District referred to the Special Master.
- Apr 24 2015Order extending time to file response to motion to intervene file by El Paso County Water Improvement District No. 1 granted to and including June 10, 2015, for all parties. Reply briefs are due July 10, 2015.
- Apr 22 2015Motion for leave to intervene filed by El Paso County Water Improvement District No. 1.
- Apr 08 2015Motion DISTRIBUTED for Conference of April 24, 2015.
- Mar 20 2015Reply to Briefs Opposing Motion for Leave to Intervene of Hernandez, Steven Landeros Elephant Butte Irrigation District filed.
- Feb 02 2015Order extending time to file a reply to the responses to the motion to intervene by Elephant Butte Irrigation District to and including March 20, 2015.
- Jan 29 2015Response in opposition to Elephant Butte Irrigation District's motion for leave to intervene from United States filed.
- Jan 29 2015Response in opposition to Elephant Butte Irrigation District's motion of for leave to intervene by New Mexico filed.
- Jan 29 2015Response to Elephant Butte Irrigation District's motion to intervene from petitioner Texas, Plaintiff filed.
- Jan 29 2015Response to Elephant Butte Irrigation District's motion to intervene from respondent Colorado filed.
- Dec 10 2014Order extending time to file response to Motion for leave to intervene to and including January 29, 2015, for all parties.
- Dec 03 2014Motion for leave to intervene filed by Elephant Butte Irrigation District.
- Nov 06 2014Oath of Special Master filed.
- Nov 03 2014It is ordered that A. Gregory Grimsal, Esquire, of New Orleans, Louisiana, is appointed Special Master in this case with authority to fix the time and conditions for the filing of additional pleadings, to direct subsequent proceedings, to summon witnesses, to issue subpoenas, and to take such evidence as may be introduced and such as he may deem it necessary to call for. The Special Master is directed to submit Reports as he may deem appropriate. The compensation of the Special Master, the allowances to him, the compensation paid to his legal, technical, stenographic and clerical assistants, the cost of printing his Reports, and all other proper expenses, including travel expenses, shall be charged against and be borne by the parties in such proportion as the Court may hereafter direct.
- Jul 09 2014DISTRIBUTED for Conference of September 29, 2014.
- Jul 01 2014Reply of respondent New Mexico filed.
- Jun 17 2014Objection to New Mexico's Lodging Request filed by Counsel for Texas.
- Jun 16 2014Brief for the United States in opposition to New Mexico's Motion to Dismiss Texas's Complaint and the United States' Complaint in Intervention filed.
- Jun 16 2014Texas's Brief in Response to New Mexico's Motion to Dismiss Texas's Complaint and the United States' Complaint in Intervention filed.
- Jun 16 2014Brief amicus curiae of City of El Paso, Texas filed.
- Jun 16 2014Lodging request received from the City of El Paso, Texas
- Jun 16 2014Brief amicus curiae of Hudspeth County Conservation and Reclamation District No. 1 filed.
- Jun 16 2014Brief amicus curiae of El Paso County Water Improvement District No. 1 filed.
- May 08 2014Lodging Request received from Counsel for New Mexico.
- Apr 30 2014Motion to dismiss Texas' Complaint and the United States' Complaint in Intervention filed by respondent New Mexico.
- Apr 30 2014Brief amicus curiae of City of Las Cruces filed.
- Mar 31 2014Motion for leave to intervene filed by United States GRANTED.
- Mar 14 2014Reply of United States in support of motion to intervene filed. (Distributed)
- Mar 12 2014DISTRIBUTED for Conference of March 28, 2014.
- Mar 10 2014Order extending time to file the Motion to Dismiss the Bill of Complaint filed by Texas to a date 30 days after the Court issues an order on the Motion for Leave to Intervene filed by the United States. Extension granted for all Respondents.
- Mar 10 2014Response in support of motion of the United States for leave to intervene as a plaintiff from petitioner Texas, Plaintiff filed. (Distributed)
- Mar 10 2014Response to motion of the United States for leave to intervene as a plaintiff, from respondent New Mexico filed. (Distributed)
- Feb 27 2014Motion for leave to intervene filed by United States.
- Jan 27 2014Motion for leave to file a bill of complaint is GRANTED. Motion for leave to file supplemental brief is GRANTED. New Mexico is allowed 60 days within which to file a motion to dismiss, in the nature of a motion under Rule 12(b)(6), Federal Rules of Civil Procedure. Plaintiff is allowed 45 days to file a response to the motion. A reply, if any, shall be filed within 15 days after the response is filed.
- Jan 08 2014Motion DISTRIBUTED for Conference of January 24, 2014.
- Jan 07 2014Motion for leave to file supplemental brief and supplemental brief in response to New Mexico's supplemental brief filed by petitioner Texas, Plaintiff.
- Dec 31 2013Supplemental brief of respondent New Mexico filed.
- Dec 31 2013Supplemental brief of respondent Colorado filed.
- Dec 10 2013Brief amicus curiae of United States filed.
- Apr 15 2013The Solicitor General is invited to file a brief in this case expressing the views of the United States.
- Mar 27 2013DISTRIBUTED for Conference of April 12, 2013.
- Mar 22 2013Reply of petitioner Texas, filed.
- Mar 11 2013Brief amicus curiae of Hudspeth County Conservation and Reclamation District No. 1 filed.
- Mar 11 2013Brief amicus curiae of El Paso County Water Improvement District No. 1 filed.
- Mar 11 2013Brief of respondent Colorado in opposition filed.
- Mar 11 2013Brief amicus curiae of City of El Paso, Texas filed.
- Mar 11 2013Brief of respondent New Mexico in opposition filed.
- Mar 11 2013Brief amicus curiae of City of Las Cruces filed.
- Jan 08 2013Motion for leave to file a bill of complaint filed. (Response due March 11, 2013)
- Jan 01 2013Documents filed with the Special Master may be found at https://www.ca3.uscourts.gov/texas-v-new-mexico-and-colorado-no-141-original