United States v. Louisiana, 498 U.S. 9 (1990)
    
      
United States v. Louisiana
(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
498 U.S. 9
    
    ON BILL OF COMPLAINT
    Supplemental decree entered.
    Opinions Reported:  363 U. S. 1, 470 U. S. 93, and 485 U. S. 88; final decree reported: 364 U. S. 502.
    The Additional Supplemental Report of the Special Master, dated October 1, 1990, is received and ordered filed.  The recommended Supplemental Decree is approved.
    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
    
      
          THROUGH                633487.70   195977.80
    
      
          THROUGH                632600.10   195607.60
    
      
          THROUGH                631541.99   195143.47
    
      
          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
    
      
          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
    
      
          THROUGH                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
    
      
          TO                     475218.46   201529.55;
    
              (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
    
      
          THROUGH                468023.27   199707.98
    
      
          THROUGH                466932.10   198967.80
    
      
          THROUGH                465591.05   198219.69
    
      
          THROUGH                464163.11   197420.58
    
      
          TO                     463004.481  196885.896;
    
              (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.