anchor.diff:  476,79,"2216","LOUISIANA","LAKE VERRET","ASSUMPTION","NATURAL",NA,56.98,1.5,NA,NA,"years",93,253,0.5,0.163,0.056,0.1,1.26,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,29.943889,-91.189444,62
   476,80,"2217","LOUISIANA","LAKE VERNON","VERNON","IMPOUNDMENT",295.3,17.09,4.1,4.13,197,"days",10,31,1.6,0.018,0.007,0.12,0.62,NA,NA,20,4150,4170,NA,NA,695,99680,100375,2995,28,0.24,73175,27,5.9,31.177222,-93.357778,4.9
   476,81,"2901","MISSOURI","CLEARWATER LAKE","REYNOLDS uAYNE","IMPOUNDMENT",2325.8,6.6,4.1,NA,13,"days",98,201,1.4,0.017,0.004,0.15,0.3,1265,NA,15,6380,7660,3560,NA,560,782015,786135,20965,NA,1.16,973230,NA,119.1,37.135,-90.775,3.6
  -476,82,"2902","MISSOURI","POMME DE TERRE RESERVOIR","POLK HICKORY","IMPOUNDMENT",1592.8,31.65,9.5,11.81,314,"days",120,222,1.3,0.043,0.008,0.275,0.805,7120,NA,25,13635,20780,17405,NA,990,588640,607035,126800,39,0.66,433540,29,19.2,37.897222,-93.313889,9.4
  +476,82,"2902","MISSOURI","POMME DE TERRE RESERVOIR","POLK HICKORY","IMPOUNDMENT",1592.8,31.65,9.5,11.81,314,"days",120,222,1.3,0.043,0.008,0.275,0.805,7120,NA,25,13635,20780,17405,NA,990,588640,607035,12680,39,0.66,433540,29,19.2,37.897222,-93.313889,9.4
   476,83,"2903","MISSOURI","STOCKTON RESERVOIR",NA,"IMPOUNDMENT",3004.4,100.77,7.3,22.65,1.1,"years",132,230,1.8,0.022,0.006,0.67,0.985,20700,NA,5,28590,49295,56575,NA,215,1734420,1791210,10740,78,0.49,1106085,38,17.8,37.689722,-93.765,9
   476,84,"2905","MISSOURI","THOMAS HILL RESERVOIR","MACON RANDOLPH","IMPOUNDMENT",388.5,17.81,4.1,2.14,1.2,"years",56,257,0.3,0.082,0.011,1.04,1.55,NA,NA,5,8530,8535,NA,NA,215,203465,203680,3700,57,0.48,107770,47,11.4,39.524722,-92.636667,5.8
  -476,85,"2906","MISSOURI","LAKE WAPPAPELLO","WAYNE 9 BUTLER","IMPOUNDMENT",3395.5,16.59,3,38.61,14,"days",68,139,1,0.033,0.004,0.105,0.35,375,NA,75,31510,31960,1120,NA,2835,13766125,1310080,52670,NA,1.93,1526360,NA,82.6,37.928889,-90.286667,9.6
  +476,85,"2906","MISSOURI","LAKE WAPPAPELLO","WAYNE 9 BUTLER","IMPOUNDMENT",3395.5,16.59,3,38.61,14,"days",68,139,1,0.033,0.004,0.105,0.35,375,NA,75,31510,31960,1120,NA,2835,1366125,1370080,52670,NA,1.93,1526360,NA,82.6,37.928889,-90.286667,9.6
   476,86,"3101","NEBRASKA","BRANCHED OAK RESERVOIR","LANCASTER","IMPOUNDMENT",214.7,7.28,5.5,0.76,2.8,"years",226,406,1.1,0.044,0.013,0.07,0.86,NA,NA,NA,5250,5250,NA,NA,NA,55755,55755,1035,80,0.72,16065,71,7.7,40.970556,-96.854444,17
   476,87,"3102","NEBRASKA","HARLAN COUNTY RESERVOIR","HARLAN","IMPOUNDMENT",35042.7,54.5,7.8,11.37,1.4,"years",199,475,0.6,0.112,0.061,0.365,1.09,3190,NA,45,117890,121125,9390,NA,1600,1033905,1044895,24740,80,2.22,349165,67,19.2,40.0575,-99.21,27.8
   476,88,"3103","NEBRASKA","HARRY D STRUNK RES","FRONTIER","IMPOUNDMENT",1657.6,7.49,5.8,2.13,280,"days",176,335,0.8,0.064,0.009,0.46,1.03,1320,NA,5,44555,45880,3965,NA,95,258420,262480,2725,94,6.13,112530,57,35,40.38,-100.216667,14.4
  -476,89,"3104","NEBRASKA","HUGH BUTLER RESERVOIR","FRONTIFRcRED HILLOH","IMPOUNDMENT",828.8,6.59,5.9,1.4,1.2,"years",240,314,0.8,0.061,0.014,0.09,0.74,NA,NA,10,10535,10595,NA,NA,340,88050,88390,1940,82,1.61,48705,45,13.4,40.356389,-100.670278,16.6
  +476,89,"3104","NEBRASKA","HUGH BUTLER RESERVOIR","FRONTIFRcRED HILLOH","IMPOUNDMENT",828.8,6.59,5.9,1.4,1.2,"years",240,314,0.8,0.061,0.014,0.09,0.74,NA,NA,10,10585,10595,NA,NA,340,88050,88390,1940,82,1.61,48705,45,13.4,40.356389,-100.670278,16.6
   476,90,"3105","NEBRASKA","JOHNSON RESERVOIR","DARSONGOSPER","IMPOUNDMENT",NA,11.53,6.1,33.37,27,"days",177,728,0.6,0.075,0.009,0.34,0.94,NA,NA,165,77295,77460,NA,NA,6115,1616795,1622910,52295,32,6.72,1172000,28,140.8,40.683333,-99.916667,26.1
   476,91,"3106","NEBRASKA","CW MCCONAUGHY RES","KEITH","IMPOUNDMENT",66821.9,141.84,19.8,45.08,2.4,"years",202,659,2.3,0.027,0.004,0.585,0.83,1475,NA,45,190890,192410,4430,NA,1625,4218715,4224770,38575,80,1.36,1218105,71,29.8,41.2125,-101.680556,8.6
   476,92,"3107","NEBRASKA","PAWNEE RESERVOIR","LANCASTER","IMPOUNDMENT",85.2,2.99,3.7,0.23,2.9,"years",223,384,1.2,0.06,0.02,0.175,1.065,NA,NA,NA,2190,2190,NA,NA,NA,16885,16885,555,75,0.73,5560,67,5.6,40.839444,-96.867222,15.4
   476,93,"3108","NEBRASKA","SHERMAN RESERVOIR","SHERHAN","IMPOUNDMENT",NA,11.51,7.3,NA,NA,"years",105,169,1.2,0.067,0.05,0.09,0.34,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,41.325,-98.9,5.7
  -476,94,"3110","NEBRASKA","SWANSON RESERVOIR","HITCHCOCK","IMPOUNDMENT",10204.6,20.13,7.3,4.17,1.4,"years",241,457,0.9,0.067,0.016,0.09,0.62,1560,NA,10,15925,17495,4540,NA,285,271685,276510,59300,66,0.87,133805,50,13.7,40.171111,-101.065833,NA
  +476,94,"3110","NEBRASKA","SWANSON RESERVOIR","HITCHCOCK","IMPOUNDMENT",10204.6,20.13,7.3,4.17,1.4,"years",241,457,0.9,0.067,0.016,0.09,0.62,1560,NA,10,15925,17495,4540,NA,285,271685,276510,5930,66,0.87,138805,50,13.7,40.171111,-101.065833,NA
   476,95,"3801","NORTH DAKOTA","LAKE ASHTABULA","0ARNE5ORIGGS","IMPOUNDMENT",4966.9,21.98,4,3.737,304,"days",260,571,0.7,0.26,0.17,0.16,1.66,1975,NA,35,30025,32035,5915,NA,1065,295885,302865,25825,19,1.46,243675,20,13.8,47.036667,-98.078889,40.9
   476,96,"3802","NORTH DAKOTA","AUDUBON LAKE","MCLEAN","IMPOUNDMENT",NA,48.56,NA,NA,NA,"years",400,1211,1.4,0.087,0.015,0.22,1.795,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,47.583333,-101.133333,11.3
   476,97,"3803","NORTH DAKOTA","BRUSH LAKE","MCLEAN","NATURAL",NA,0.81,2.5,NA,NA,"years",408,856,1.3,0.066,0.01,0.095,1.81,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,47.556944,-100.7125,29.1
  
positive.code: 476,105,"3812","NORTH DAKOTA","LANE SAKAKAWEA","DUNNHCNENzIEHCLEANHERCERMOUNTRAILHILLIAHS","IMPOUNDMENT",469825.8,1490.21,18.9,652.93,1.6,"years",167,549,2.3,0.016,0.007,0.15,0.33,17655,NA,10,6680100,6697765,52950,NA,455,28083775,28137180,462250,93,4.49,10446205,63,18.9,47.504167,-101.433333,6.9
  476,107,"3813","NORTH DAKOTA","SPIRITWOOD LAKE","STUTSMAN","NATURAL",NA,1.67,8.8,NA,NA,"years",376,2325,2.1,0.156,0.082,0.29,2.54,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,47.076389,-98.595,34.7
  476,108,"3814","NORTH DAKOTA","SWEET BRIAR LAKE","MORTON","IMPOUNDMENT",393.7,1.1,2.9,0.232,183,"days",280,579,1.5,0.092,0.031,0.09,1.32,NA,NA,10,1875,1885,NA,NA,420,23010,23430,1030,45,1.71,12265,48,21.3,46.864444,-101.26,39
  476,109,"3815","NORTH DAKOTA","WHITMAN LAKE","NELSONHALSH","IMPOUNDMENT",111.4,858,2.7,81,255,"days",182,406,0.5,0.26,0.185,0.26,1.32,NA,NA,5,NA,NA,NA,NA,105,5235,NA,520,NA,0.83,5340,0,9.2,48.185,-98.075,27.1
  476,11,"0501","ARKANSAS","BEAVER RESERVOIR","BENTON CARROLL o IASHINGTON","IMPOUNDMENT",3087.3,114.2,17.8,42.45,1.5,"years",49,94,2.1,0.022,0.006,0.33,0.61,45860,NA,10,36160,82010,159785,NA,385,1448335,1608505,18580,77,0.72,1110180,31,14.1,36.420833,-93.851389,3.9
  476,110,"4001","OKLAHOMA","ALTUS RESERVOIR","GREER KIOMA","IMPOUNDMENT",5480.4,25.41,6.4,4.09,2.1,"years",143,2019,0.8,0.041,0.01,0.06,0.63,NA,NA,5,10700,10705,NA,NA,120,902625,902745,3910,63,0.42,96825,89,35.5,34.8875,-99.291667,14.8
  476,111,"4002","OKLAHOMA","ARBUCKLE LAKE","MURRAY","IMPOUNDMENT",326.3,9.51,9.4,1.34,3.2,"years",158,379,1.4,0.02,0.008,0.07,0.44,NA,NA,NA,3810,3810,NA,NA,NA,61220,61220,885,77,0.4,28905,53,6.4,34.425833,-96.999167,7
  476,112,"4003","OKLAHOMA","LAKE ELSWORTH","CADDO COMANCHE","IMPOUNDMENT",642.3,22.66,5.1,4.26,1.4,"years",150,367,1,0.037,0.009,0.07,0.62,1980,NA,5,3510,5495,4480,NA,160,158970,163610,4665,15,0.24,89635,45,7.2,34.800833,-98.355,8.4
  476,113,"4004","OKLAHOMA","LAKE EUFAULA","HASKELL MCINTOSH OKMULGEEo PITTSBURG","IMPOUNDMENT",97958.9,414.81,10.1,181.73,309,"days",88,382,0.4,0.081,0.029,0.405,0.81,429755,NA,10,1297160,1726905,868285,NA,270,10349635,11218190,1084280,37,4.16,10392320,7,27,35.307778,-95.359444,4.4
  476,114,"4005","OKLAHOMA","FORT COBB RESERVOIR",NA,"IMPOUNDMENT",787.4,16.47,6.4,1.23,7.6,"years",157,450,1.1,0.038,0.012,0.11,0.76,260,NA,5,9105,9370,775,NA,115,105525,106415,590,94,0.57,16100,85,6.5,35.165278,-98.455556,15
  476,115,"4006","OKLAHOMA","FORT SUPPLY RESERVOIR","MOODuARO","IMPOUNDMENT",3869.5,7.61,11.9,2.31,1.6,"years",184,797,0.4,0.07,0.014,0.135,0.69,980,NA,5,2335,3320,2930,NA,105,49440,52475,26700,20,0.44,60715,NA,6.9,36.55,-99.569444,9.7
  476,116,"4007","OKLAHOMA","FOSS RESERVOIR","CUSTER","IMPOUNDMENT",3859.1,35.61,8.9,2.89,43.7,"years",151,1879,0.9,0.027,0.006,0.09,0.7,310,NA,5,9300,9675,1105,NA,160,193865,195130,NA,NA,0.27,NA,NA,5.5,35.541111,-99.187222,4.9
  476,117,"4008","OKLAHOMA","LAKE FRANCES","AOAIR","IMPOUNDMENT",1644.6,2.31,1.8,16.47,3,"days",99,189,0.4,0.142,0.093,1.78,2.135,595,NA,NA,84185,84780,1785,NA,NA,1326215,1328000,66540,22,36.7,1069760,19,574.9,36.125,-94.515,8
  476,118,"4009","OKLAHOMA","GRND LK O' THE CHEROKEES","HAYES DELAWARE CRAIG OTTONA","IMPOUNDMENT",26671.5,188.18,10.9,194.68,129,"days",97,253,0.8,0.087,0.038,0.74,1.13,34600,12585,60,1250605,1297850,95125,4025,2335,13481690,13583175,684480,47,6.9,10157185,25,72.2,36.475,-95.035,6.8
  476,12,"0504","ARKANSAS","BULL SHOALS RESERVOIR","BAXTER BOONE MARION AR! TANEY OZARK MO","IMPOUNDMENT",15672.1,183.89,20.4,165.04,259,"days",131,223,3.4,0.015,0.004,0.38,0.53,1475,NA,35,101670,103180,4420,NA,1225,6945940,6951585,64915,37,0.56,3777390,46,37.8,36.3675,-92.572222,3.9
  
negative.code: 476,147,"4621","SOUTH DAKOTA","PICKEREL LAKE","DAY","NATURAL",NA,3.86,6.1,NA,NA,"years",242,390,1.5,0.049,0.009,0.095,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,45.484722,-97.265833,15.8
  476,148,"4622","SOUTH DAKOTA","LAKE POINSETT","HROOKINGboHAMLIN","NATURAL",733,29.26,2.9,0.073,35.4,"years",267,1038,0.8,0.115,0.023,0.315,2.765,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,44.547222,-97.080556,40.2
  476,149,"4623","SOUTH DAKOTA","SOUTH RED IRON LAKE","MARSHALL","NATURAL",NA,2.51,2.1,NA,NA,"years",216,515,1.8,0.042,0.01,0.11,1.52,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,45.491667,-96.266667,6.9
  476,15,"2904","MISSOURI","LAKE TANEYCOMO","TANEY","IMPOUNDMENT",11297.6,12.22,5.8,123.81,7,"days",96,155,2,0.023,0.007,0.53,0.72,5125,NA,10,69010,74145,9555,NA,415,6234120,6244090,87280,NA,6.07,6038630,3,511,36.657778,-93.124722,9.8
  476,150,"4624","SOUTH DAKOTA","RICHMOND LAKE","RROMN","IMPOUNDMENT",450.7,3.35,4.6,0.016,54,"years",265,905,2.3,0.187,0.144,0.15,1.57,NA,NA,30,345,375,NA,NA,1145,4930,6075,30,92,0.11,410,93,1.8,45.552778,-98.6,18.5
  476,151,"4625","SOUTH DAKOTA","ROY LAKE","MARSHALL","NATURAL",NA,6.85,3.3,NA,NA,"years",262,1152,1.8,0.034,0.01,0.07,1.97,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,45.691667,-97.425,13.3
  476,152,"4626","SOUTH DAKOTA","SAND LAKE",NA,"IMPOUNDMENT",10308.2,3.1,0.8,2.364,12,"days",314,849,0.7,0.489,0.288,0.11,2.29,3060,NA,NA,18855,21915,9180,NA,NA,171950,181130,17010,22,7.07,142740,21,58.4,45.6675,-98.305556,NA
  476,153,"4627","SOUTH DAKOTA","SHERIDAN LAKE","PENNINGTON","IMPOUNDMENT",230.5,1.56,10.2,0.14,3.6,"years",104,177,2.7,0.053,0.016,0.105,0.565,NA,NA,5,290,295,NA,NA,245,5075,5320,170,42,0.19,3060,42,3.4,43.975278,-103.451667,15.4
  476,154,"4628","SOUTH DAKOTA","STOCKADE LAKE","CUSTER","IMPOUNDMENT",202,0.53,5.8,0.135,274,"days",118,227,1.7,0.233,0.109,0.15,1.27,235,NA,NA,425,660,540,NA,NA,5050,5590,1075,NA,1.25,14780,NA,10.5,43.763889,-103.5125,25.4
  476,155,"4629","SOUTH DAKOTA","EAST VERMILLION LAKE","MCCOOK","IMPOUNDMENT",1036,2.23,3.7,0.095,2.8,"years",149,695,0.7,0.211,0.092,0.1,1.84,NA,NA,5,655,660,NA,NA,90,8440,8530,120,82,0.3,3655,57,3.8,43.590278,-97.1725,100.8
  476,156,"4630","SOUTH DAKOTA","WALL LAKE","HINNEHAHA","NATURAL",NA,0.9,2.6,NA,NA,"years",173,1083,1.5,0.194,0.076,0.16,2.25,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,45.5625,-96.9625,55.3
  476,157,"4631","SOUTH DAKOTA","NORTH WAUBAY LAKE","DAY","NATURAL",NA,14.16,2.7,NA,NA,"years",418,4301,0.8,0.98,0.023,0.145,3.62,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,45.391667,-96.45,127
  476,158,"4801","TEXAS","AMISTAD RESERVOIR",NA,"IMPOUNDMENT",313828.9,262.43,16.5,58.506,3.8,"years",137,823,3.3,0.013,0.009,0.5,0.72,NA,NA,NA,257295,257295,NA,NA,NA,NA,NA,14320,94,0.98,1193690,72,16.2,29.459722,-101.055556,2
  476,159,"4802","TEXAS","LAKE BASTROP","BASTROP","IMPOUNDMENT",24.6,3.67,5.6,0.238,5.2,"years",137,841,2,0.022,0.007,0.09,0.525,NA,NA,NA,985,985,NA,NA,NA,12100,12100,105,89,0.27,2795,77,3.3,30.155556,-97.291667,12.4
  476,16,"0502","ARKANSAS","BLACKFISH LAKE","CRITTENDEN ST FRANCIS","NATURAL",288.8,1.62,1.8,287.1,8,"days",33,88,0.1,0.424,0.09,1.47,2.425,NA,NA,5,112130,112135,NA,NA,275,390625,390900,92130,18,69.22,303920,22,241.3,35.129167,-90.456944,19.8
  476,160,"4803","TEXAS","BELTON RESERVOIR","HELL CURYELL","IMPOUNDMENT",9230.8,50.27,10.8,18.32,1.6,"years",142,388,3.1,0.016,0.007,0.185,0.52,24210,NA,50,174400,198660,57570,NA,1945,894340,953855,17455,91,3.95,480930,50,19,31.106667,-97.475278,8
  