opinion: UNITED STATES v. LOUISIANA et al. (ALABAMA AND MISSISSIPPI BOUNDARY CASE)
  No. 9,
  Orig.
  Decided May 31, 1960, February 26, 1985, and
  March 1, 1988
  Final Decree Entered December 12, 1960 — Supplemental Decree Entered November 5, 1990
  SUPPLEMENTAL DECREE
  By its decision of February 26, 1985, the Court overruled the exception of the United States to the Report of its Special Master herein insofar as it challenged the Master’s determination that the whole Mississippi Sound constitutes historic inland waters, and, to this extent, adopted the Master’s recommendations and confirmed his Report.
  On March 1, 1988, the Court resolved the disagreement between the United States and Mississippi as to that portion of the Mississippi coastline at issue in the above-captioned litigation and directed the parties to submit to the Special Master a proposed appropriate decree defining the claims of Alabama and Mississippi with respect to Mississippi Sound. The parties have agreed on and submitted to the Special Master a proposed decree in accordance with the Court’s decision of March 1, 1988.
  IT IS ORDERED, ADJUDGED, AND DECREED as follows:
  1. For the purposes of the Court’s Decree herein dated December 12, 1960, 364 U. S. 502 (defining the boundary line between the submerged lands of the United States and the submerged lands of the States bordering the Gulf of Mexico), the coastline of the States of Alabama and Mississippi shall be determined on the basis that the whole of Mississippi Sound constitutes state inland waters;
  2. For the purposes of said Decree of December 12, 1960, the coastline of Alabama includes a straight line from a point on the western tip of Dauphin Island where X = 238690 and Y = 84050 in the Alabama plane coordinate system, west zone, and X = 659783.79 and Y = 204674.56 in the Mississippi plane coordinate system, east zone, to a point on the eastern tip of Petit Bois Island where X = 215985 and Y = 77920 in the Alabama plane coordinate system, west zone, and X = 637152.89 and Y = 198279.25 in the Mississippi plane coordinate system, east zone, so far as said line lies on the Alabama side of the Alabama-Mississippi boundary.
  3. For the purposes of said Decree of December 12, 1960, the coastline of Mississippi includes the following:
  (a) That portion of the straight line described in paragraph 2, above, lying on the Mississippi side of Alabama-Mississippi boundary;
  (b) The baseline delimiting Petit Bois Island determined by the following points in the Mississippi plane coordinate system, east zone:
  E. COORD. N. COORD.
  X Y
  A POINT AT 636103.06 197409.43
  A POINT AT 635730.88 197167.57
  A POINT AT 635197.10 196848.81
  A POINT AT 634824.92 196606.95
  A POINT AT 634494.81 196403.07
  A LINE FROM 634116.89 196223.65
  633487.70 195977.80 THROUGH
  632600.10 195607.60 THROUGH
  631541.99 195143.47 THROUGH
  E. COORD N. COORD.
  X Y
  THROUGH 630508.20 194904.30
  THROUGH 629479.90 194591.90
  THROUGH 628525.00 194321.70
  THROUGH 628401.73 194306.69
  THROUGH 628036.92 194289.93
  THROUGH 627476.60 194182.00
  THROUGH 626488.60 193948.10
  THROUGH 625932.59 193802.79
  THROUGH 625516.00 193766.90
  THROUGH 623861.36 193478.53
  THROUGH 622820.50 193454.10
  THROUGH 621823.80 193356.00
  THROUGH 620825.20 193257.90
  THROUGH 619847.89 193131.55
  THROUGH 618538.77 193268.72
  THROUGH 617735.69 193531.82
  THROUGH 616497.05 194054.83
  THROUGH 615577.50 194348.40
  THROUGH 614799.01 194527.45
  THROUGH 613600.50 194763.40
  THROUGH 612681.90 194895.50
  THROUGH 611818.33 195012.55
  THROUGH 611021.34 195183.22
  THROUGH 610184.77 195530.92
  THROUGH 609391.80 195685.30
  THROUGH 608419.90 195927.80
  THROUGH 607720.29 196127.06
  THROUGH 607475.00 196239.30
  THROUGH 606247.30 196809.81
  THROUGH 605675.10 197160.10
  THROUGH 604270.15 197849.15
  THROUGH 603527.87 198470.45
  TO 603006.58 199221.84;
  (c) A straight line from a point on the western tip of Petit Bois Island from X = 602984.74 and Y = 199379.08 in the Mississippi plane coordinate system, east zone, to a point on the eastern tip of Horn Island where X = 586698.88 and Y = 203743.22 in the same coordinate system;
  (d) The baseline delimiting Horn Island determined by the following points in the Mississippi plane coordinate system, east zone:
  E. COORD. N. COORD.
  X Y
  A POINT AT 586085.00 203413.20
  A POINT AT 585408.00 202870.40
  A LINE FROM 584539.17 202442.95
  THROUGH 583521.30 202226.50
  THROUGH 582523.70 201911.10
  THROUGH 581217.11 201559.05
  THROUGH 580172.00 201476.80
  THROUGH 578707.40 201327.16
  THROUGH 577716.60 201360.70
  THROUGH 576762.47 201326.88
  THROUGH 575057.04 201581.88
  THROUGH 573405.12 201965.02
  THROUGH 571199.22 202261.66
  THROUGH 570919.81 202425.88
  THROUGH 568628.38 202769.01
  THROUGH 566917.90 203142.60
  THROUGH 564973.10 203501.30
  THROUGH 563121.32 203819.44
  THROUGH 560958.00 204028.60
  THROUGH 558940.70 204238.50
  THROUGH 557048.68 204283.26
  THROUGH 554930.20 204403.10
  TO 553435.61 204348.41
  A LINE FROM 551970.97 204538.74
  THROUGH 551379.95 204841.79
  E. COORD. N. COORD.
  X Y
  THROUGH 550663.93 205145.88
  THROUGH 549562.53 205270.46
  THROUGH 547945.52 205663.99
  THROUGH 546875.90 206276.41
  THROUGH 545696.10 206670.80
  THROUGH 544396.00 207134.79
  THROUGH 542861.16 207556.77
  THROUGH 540851.48 208393.15
  THROUGH 539596.30 208786.30
  TO 538818.50 209086.77
  A LINE FROM 536831.40 209354.10
  THROUGH 535469.11 209055.01
  THROUGH 533599.69 208590.63
  THROUGH 532440.54 208312.06
  THROUGH 530361.80 207949.10
  THROUGH 528785.77 207676.76
  THROUGH 527430.00 207570.30
  THROUGH 526475.92 207467.20
  THROUGH 525672.63 207540.27
  THROUGH 522928.20 208196.10
  THROUGH 521336.78 208496.86
  THROUGH 520062.60 208576.80
  THROUGH 519137.96 208626.07
  TO 518074.58 209136.06;
  (e) A straight line from a point on the western tip of Horn Island where X = 517785.04 and Y - 209525.13 in the same coordinate system to a point on the eastern tip of the most easterly segment of Ship Island where X = 486293.70 and Y = 208216.03 in the same coordinate system;
  (f) The baseline delimiting the most easterly segment of Ship Island determined by the following points in the Mississippi plane coordinate system, east zone:
  E. COORD. N. COORD.
  X Y
  A LINE FROM 485802.92 207647.85
  484179.80 206426.60 THROUGH
  482568.66 205272.72 THROUGH
  480844.60 204246.60 THROUGH
  479440.58 203436.29 THROUGH
  478229.70 202788.30 THROUGH
  476458.71 201921.54 THROUGH
  475542.00 201634.30 THROUGH
  475218.46 201529.55; TO
  (g) A straight line from a point on the western tip of the easterly segment of Ship Island where X = 474673.81 and Y = 201505.68 in the same coordinate system to a point on the eastern end of the westerly segment of Ship Island where X = 469644.55 and Y = 200646.86 in the same coordinate system;
  (h) The baseline delimiting the most westerly segment of Ship Island determined by the following points in the Mississippi plane coordinate system, east zone:
  E. COORD. N. COORD.
  X Y
  A LINE FROM 468942.08 200226.18
  468023.27 199707.98 THROUGH
  466932.10 198967.80 THROUGH
  465591.05 198219.69 THROUGH
  464163.11 197420.58 THROUGH
  463004.481 196885.896; TO
  4. That portion of the Mississippi baseline west of the westerly segment of Ship Island determined above is the subject of a separate decree resolving Mississippi v. United States, Original No. 113.
  5. The baseline described in Paragraphs 2 and 3 above shall be, pursuant to stipulation of the parties, fixed as of the date of this decree, and shall from that date no longer be ambulatory.
  6. The parties shall bear their own costs of these proceedings; the actual expenses of the Special Master herein and the compensation due him shall be borne half by the United States and half by Mississippi.
  7. After his final accounting has been approved and any balance due him has been paid, the Special Master shall be deemed discharged with the thanks of the Court.
  8. The Court retains jurisdiction to entertain such further proceedings, enter such orders, and issue such writs as from time to time may be deemed necessary or advisable to effectuate and supplement the decree and the rights of the respective parties.
  Justice Marshall took no part in the consideration or formulation of this Supplemental Decree.