NY State L § 5 (2021)
2021 New York Laws STL - State Article 2 - State Boundaries 5 - Canada Boundary Line.

§ 5. Canada boundary line.  The boundary line between the state of New   York and Canada is as follows:Commencing  at  the  intersection  of  the parallel of the forty-fifth   degree of north latitude with the middle of the deepest channel  of  the   Richelieu  river  and  running  thence  westerly  along said parallel of   forty-five degrees north latitude as originally  run  by  Valentine  and   Collins,  1771-1774,  to  a point on the south shore of the St. Lawrence   river (but shown by the United States survey of boundary line  in  1845,   under treaty of Washington, 1842, on sheet maps XXVI to XXX to vary from   true  parallel  of forty-five degrees, as follows: monument 645, on bank   of Richelieu river, is .822 miles north of parallel of 45° and .02 miles   west from river; thence westerly 14.68 miles to monument  673,  at  .336   miles  north;  thence westerly 6.56 miles to monument 685, at .353 miles   north; thence westerly 9.20 miles to monument 703, at .004 miles  south;   thence  westerly 7.43 miles to monument 717, at .429 miles south; thence   westerly 10.02 miles to  monument  737,  at  .475  miles  south;  thence   westerly  6.34  miles  to  monument  749,  at  .140  miles south; thence   westerly 5.88 miles to monument 762, on true  parallel  of  45°;  thence   westerly  4.20 miles to monument 774, at .030 miles north on bank of St.   Lawrence river S. 74° 45' W. 1840 yards distant from the stone church in   the Indian village of St. Regis,  this  line  being  recognized  as  the   boundary  line  by  article  one  of  said treaty of Washington). Thence   beginning at aforesaid point on the south shore of  the  Saint  Lawrence   river, marked by monument 774, under the treaty of Washington, 1842, and   in  1817 by a stone monument erected by Andrew Ellicott (the location of   which point is described above), and running north 35° 45' west into the   river, on a line at right angles with the southern shore, to a point 100   yards south of the  opposite  island,  called  Cornwall  island;  thence   turning  westerly  and  passing  around the southern and western side of   said island keeping 100  yards  distant  therefrom,  and  following  the   curvatures of its shores, to a point opposite to the northwest corner or   angle  of  said island; thence to and along the middle of the main river   until it approaches the eastern extremity of Barnhart's  island;  thence   northerly along the channel which divides the last mentioned island from   the  Canada  shore,  keeping 100 yards distant from the island, until it   approaches Sheik's island; thence along the middle of the  strait  which   divides  Barnhart's  and  Sheik's islands to the channel called the Long   Sault, which separates the two last mentioned  islands  from  the  lower   Long  Sault  island;  thence  westerly  (crossing the center of the last   mentioned channel) until it approaches within 100  yards  of  the  north   shore of the Lower Sault island; thence up the north branch of the river   keeping  to the north of and near the Lower Sault island, and also north   of and near the Upper Sault, sometimes called Baxter's island, and south   of the two small islands marked on the map  A  and  B,  to  the  western   extremity  of the Upper Sault or Baxter's island; thence passing between   the two islands called the Cats, to  the  middle  of  the  river  above;   thence  along the middle of the river, keeping to the north of the small   islands marked C and D, and north also of Chrystler's island, and of the   small island next above it, marked E, until it approaches the  northeast   angle  of  Goose Neck island; thence along the passage which divides the   last mentioned island from the Canada shore, keeping 100 yards from  the   island  to  the  upper end of the same; thence south of and near the two   small islands called the Nut islands;  thence  north  of  and  near  the   island marked F, and also of the island called Dry or Smuggler's island;   thence  passing  between  the islands marked G and H to the north of the   island called Isle au Rapid Platt; thence along the north  side  of  the   last  mentioned  island,  keeping 100 yards from the shore, to the upper   end thereof; thence along the middle of the river, keeping to the  south    of  and  near  the  islands called Coussin (or Tussin) and Presque isle;   thence up the river, keeping north of and near the several Gallop  Isles   numbered on the map, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, and also of Tick,   Tibbits,  and  Chimney  islands,  and south of and near the Gallop isles   numbered 11, 12 and 13, and also of Duck, Drummond, and  Sheep  islands;   thence  along  the  middle of the river, passing north of island No. 14,   south of 15 and 16, north of 17, south of 18, 19, 20, 21, 22, 23, 24, 25   and 28, and north of 26 and 27; thence along the middle  of  the  river,   north  of  Gull island and of the islands Nos. 29, 32, 33, 34, 35, Bluff   island, and Nos. 39, 44 and 45, and to the south of  Nos.  30,  31,  36,   Grenadier  island,  and Nos. 27, 28, 40, 41, 42, 43, 46, 47 and 48 until   it approaches the east end of Wells island, thence to the north of Wells   island, and along the  strait  which  divides  it  from  Rowe's  island,   keeping  to  the  north of the small islands Nos. 51, 52, 54, 58, 59 and   61, and to the south of the small islands numbered and  marked  49,  50,   53,  55,  57,  60,  and  X,  until  it approaches the northeast point of   Grindstone island; thence to the north of Grindstone island and  keeping   to  the north also of the small islands Nos. 63, 65, 67, 68, 70, 72, 73,   74, 75, 76, 77 and 78, and to the south of Nos. 62, 64, 66, 69  and  71,   until it approaches the southern point of Hickory island; thence passing   to  the  south of Hickory island and of the two small islands lying near   its southern extremity numbered 79 and 80; thence to the south of  Grand   or  Long  island,  keeping  near  its southern shore, and passing to the   north of Carlton island, until it arrives opposite to  the  southwestern   point,  of  said  Grand  island, in Lake Ontario; thence, passing to the   north of Grenadier, Fox, Stony, and the Gallop islands, in Lake Ontario,   and to the south of and near the islands called the Ducks, to the middle   of the said lake, thence westerly along the middle of  said  lake  to  a   point  opposite  the  mouth  of  the Niagara river, thence to and up the   middle of the said river to the Great Falls; thence up the Falls through   the point of the Horse Shoe, keeping  to  the  west  of  Irish  or  Goat   island, and of the group of small islands at its head, and following the   bends  of  the  river  so  as to enter the strait between Navy and Grand   islands; thence along the middle of said strait  to  the  head  of  Navy   island;  thence  to  the  west and south of and near to Grand and Beaver   islands, and to the west of Strawberry, Squaw, and Bird islands to  Lake   Erie;  thence  southerly and westerly along the middle of Lake Erie in a   direction to enter the passage immediately south of Middle island, being   one of the easternmost of the group of islands lying in the western part   of said lake (according to the decision of the commissioners  under  the   sixth  article of the treaty of Ghent, 1814, done at Utica, state of New   York, June 18, 1822) to intersection  with  meridian  line  of  Cession,   drawn  through  the  most  westerly bent or inclination of Lake Ontario,   under deed of cession to the United  States,  executed  March  1,  1781,   under  chapter  thirty-eight  of the third session of the legislature of   this state in 1780, which meridian line was  surveyed  and  marked  with   monuments by Andrew Ellicott in 1790, as duly appointed under resolution   of  Congress, August 19, 1789, and resurveyed in 1881 to 1885, and final   report made December 1, 1885,  by  H.  W.  Clarke,  civil  engineer  and   surveyor, on the part of the state of New York.