2023 New York Laws › STL - State › Article 2 - State Boundaries › 2 - Connecticut Boundary Line.

§ 2. Connecticut  boundary line.  The boundary line between the states
  of New York and Connecticut is as follows:
Commencing at a granite monument (No. 1), at the northwest  corner  of
  the  state of Connecticut, marking the corner of Massachusetts, New York
  and Connecticut, in latitude 42° 02' 58" .427 and longitude 73° 29'  15"
  .959;  thence  south  2°  42' 30" west 30,569 feet to a granite monument
  (No. 12) 470 feet south of the Bird Hill road between Millerton and  Ore
  Hill in latitude 41° 57' 56" .772 and longitude 73° 29' 35" .078; thence
  south  3°  53'  44" west 15,846 feet to a monument (No. 18) in the south
  side of the highway from Millerton to Sharon along the  north  shore  of
  Indian Pond in latitude 41° 55' 20" .586 and longitude 73° 29' 49" .318;
  thence  south  2° 47' 51" west 10,681 feet to a monument (No. 21) on the
  Cliff North of Webatuck creek in latitude 41° 53' 35" .190 and longitude
  73° 29' 56" .210; thence south 4° 39' 01" west 10,683 feet to a monument
  (No. 24) in the rear of R. E. Randall's house  on  the  east  road  from
  Sharon  Valley  to Leedsville in latitude 41° 51' 49" .995 and longitude
  73° 30' 07" .652; thence south 3° 49' 10" west 26,405 feet to a monument
  (No. 32) on the westerly slope of a rocky hillside at the corner of  the
  towns  of Sharon and Kent in latitude 41° 47' 29" .709 and longitude 73°
  30' 30" .871; thence south 3° 52' 35" west 10,457  feet  to  a  monument
  (No.  35)  on  the  shoulder  of  a mountain northeast of Bog Hollow, in
  latitude 41° 45' 46" .637 and longitude 73° 30' 40" .199;  thence  south
  3°  06' 18" west 16,045 feet to a monument (No. 41) at the easterly edge
  of a large pasture north of Preston mountain, known as the Chapel  lots,
  in  latitude  41°  43'  08"  .354 and longitude 73° 30' 51" .658; thence
  south 3° 57' 03" west  10,657  feet  to  a  monument  (No.  45)  at  the
  southerly  end of Schaghticoke mountain in latitude 41° 41' 23" .320 and
  longitude 73° 31' 01" .335; thence south 2° 41' 41" west 10,534 feet  to
  a  monument  (No.  48)  on  the  northwesterly slope of Ten-Mile hill in
  latitude 41° 39' 39" .359 and longitude 73° 31' 07" .860;  thence  south
  3°  31' 33" west 21,140 feet to a monument (No. 55) at the northerly end
  of a rocky hill about a mile south of the northeast corner of  the  town
  of Pawling, New York, in latitude 41° 36' 10" .894 and longitude 73° 31'
  24"  .972;  thence  south 4° 24' 52" west 10,785 feet to a monument (No.
  59) in a field east of a right angle in the road  from  Quaker  Hill  to
  Sherman  in  latitude  41°  34' 24" .659 and longitude 73° 31' 35" .893;
  thence south 3° 52' 52" west 10,520 feet to a monument  (No.  64)  on  a
  ledge  falling southwest to a brook in the southwestern part of the town
  of Sherman in latitude 41° 32' 40" .963 and longitude 73° 31' 45"  .257;
  thence  south  4°  28'  48"  west  10,410 feet to a monument (No. 68) on
  Cranberry mountain in latitude 41° 30' 58" .424 and  longitude  73°  31'
  55"  .946;  thence  south 2° 24' 38" west 10,617 feet to a monument (No.
  72) on the northerly slope of a hill a mile south of Haviland Hollow  in
  latitude  41°  29' 13" .627 and longitude 73° 32' 01" .813; thence south
  3° 03' 12" west 20,731 feet to a monument (No.  80)  in  a  mowed  field
  southeast of an angle in the road from Brewster to Ball pond in latitude
  41° 25' 49" .108 and longitude 73° 32' 16" .309; thence south 4° 53' 12"
  west  10,279  feet  to  a monument (No.   84) on the northerly side of a
  rocky summit northwest of Mill Plain in latitude 41° 24'  07"  .915  and
  longitude  73° 32' 27" .798; thence south 2° 45' 48" west 10,527 feet to
  a monument (No. 89) in a swampy pasture south of a right angle in a back
  road which runs  along  the  line  between  the  towns  of  Danbury  and
  Ridgefield  in latitude 41° 22' 24" .030 and longitude 73° 32' 34" .456;
  thence south 4° 36' 39" west 10,878 feet to a monument  (No.  91)  in  a
  swamp  near  Mopus  brook in latitude 41° 20' 36" .900 and longitude 73°
  32' 45" .920; thence south 4° 12' 16" west 10,493  feet  to  a  monument
  (No.  96)  south  of a ledge on Titicus mountain in latitude 41° 18' 53"
  .507 and longitude 73° 32' 56" .001; thence south 6° 32' 21" west  7,214

  feet  to  a  monument  (No. 98) known as the Ridgefield angle on a steep
  side hill sloping toward South pond in latitude 41°  17'  42"  .690  and
  longitude 73° 33' 06" .764; thence south 32° 46' 06" east 14,109 feet to
  a  monument  (No. 103) in a swamp near a small brook in latitude 41° 15'
  45" .460 and longitude 73° 31' 26" .775; thence south 32° 41'  46"  east
  10,443  feet  to  a monument (No.   106) at the westerly side of a rocky
  ridge near the southwest corner of Ridgefield in latitude  41°  14'  18"
  .626  and  longitude  73°  30'  12"  .940; thence south 32° 02' 28" east
  11,047 feet to a monument  (No.  109)  known  as  the  Wilton  angle  in
  woodland  northwest  of  Bald  Hill  in  latitude  41°  12' 46" .101 and
  longitude 73° 28' 56" .263; thence south 59° 59' 58" west 9,588 feet  to
  a  monument  (No.  112)  on the south side of a short cross road leading
  west from the Vista road in latitude 41° 11' 58" .721 and longitude  73°
  30'  44"  .877;  thence  south 57° 58' 49" west 6,002 feet to a monument
  (No. 115) on the northeasterly slope of a low, wooded hill one-half mile
  west of Mud pond and northeast of Sellick's Corners in latitude 41°  11'
  27"  .272  and longitude 73° 31' 51" .438; thence south 59° 09' 58" west
  15,983 feet to a monument (No. 120) on the summit of a rocky ridge  half
  way  between  two  large swamps, northeast of long ridge in latitude 41°
  10' 06" .294 and longitude 73° 34' 50" .871; thence south  58°  56'  22"
  west 21,193 feet to a monument (No. 127) in level woodland west of a low
  hill  west  of Banksville in latitude 41° 08' 18" .189 and longitude 73°
  38' 48" .129; thence south 58° 32' 47"  west  26,355  feet  to  a  rough
  granite  monument  (No.  140)  known  as  the Duke's Trees angle, set in
  concrete with its top below the roadway called King street  in  latitude
  41°  06'  02"  .205 and longitude 73° 43' 41" .778; thence south 31° 29'
  41" east 11,440 feet to a monument (No. 148) 300 feet north of the  road
  leading  west from King street south of Rye lake in latitude 41° 04' 25"
  .814 and longitude 73° 42' 23" .747;  thence  south  32°  10'  57"  east
  14,975  feet  to  a  monument  (No. 153) at the east side of King street
  1,000 feet north of Ridge street  in  latitude  41°  02'  20"  .570  and
  longitude 73° 40' 39" .666; thence south 32° 07' 30" east 11,461 feet to
  a  granite monument (No. 158) set at the north side of Byram bridge in a
  concrete pier on a granite ledge known since 1684 as the Great Stone  at
  the  wading place in latitude 41° 00' 44" .662 and longitude 73° 39' 20"
  .172; thence south 9° 53' 43" west 835 feet to a brass  bolt  and  plate
  (No.  159)  set in the top of a large boulder in Byram river in latitude
  41° 00' 36" .535 and longitude 73° 39' 22" .044; thence  south  18°  56'
  41"  west 3,735 feet to angle No. 161 in Byram river in latitude 41° 00'
  1" .626 and longitude 73° 39' 37" .863, this tangent being produced  and
  referenced  on  the shore by a brass bolt and plate leaded into the rock
  on a steep hill; thence south 12° 57' 02" east 965 feet to angle No. 162
  in Byram river in latitude 40° 59' 52" .335 and longitude  73°  39'  35"
  .044,  the line being produced and referenced by a bolt and plate in the
  rock on a hill east of the river; thence south 5° 14' 08" west 950  feet
  to  angle  No.  163  in  Byram  river  in  latitude 40° 59' 42" .995 and
  longitude 73° 39' 36" .173, the line being produced and referenced by  a
  bolt and plate in the ledge on the west shore of the river; thence south
  9° 10' 19" east 692 feet to angle No. 164 in Byram river in latitude 40°
  59' 36" .249 and longitude 73° 39' 34" .736, the line being produced and
  referenced  by  a  bolt and plate in the shore; thence south 34° 35' 04"
  east 684 feet to angle No. 165 in Byram river in latitude  40°  59'  30"
  .682  and  longitude  73°  39' 29" .671, both ends of this and the three
  subsequent tangents being produced and referenced  by  brass  bolts  and
  plates  set in the ledge on the shore of the river; thence south 26° 00'
  02" east 229 feet to angle No. 166 in latitude  40°  59'  28"  .646  and
  longitude  73°  39'  28"  .360; thence south 5° 26' 38" west 402 feet to
  angle No. 167 in latitude 40° 59' 24" .694 and  longitude  73°  39'  28"

  .857;  thence  south  50°  49'  51"  west  815  feet to angle No. 168 in
  latitude 40° 59' 19" .608 and longitude 73° 39' 37" .096;  thence  south
  30°  01'  41" east 1,924 feet to angle No. 169, a point in the center of
  the  channel  in  line  with  the breakwater at Lyon's or Byram point in
  latitude 40° 59' 03" .152 and longitude 73° 39' 24" .546, the  northerly
  end  of  this tangent being produced back and referenced by a brass bolt
  and plate in the ledge overlooking the harbor;  thence  south  45°  east
  17,160  feet or three and one-quarter miles to angle No. 170 in latitude
  40° 57' 03" .228 and longitude 73° 36' 46" .418, the first  angle  point
  in  Long  Island  sound described by the joint commissioners of New York
  and Connecticut by a memorandum  of  agreement  dated  December  eighth,
  eighteen hundred and seventy-nine; thence in a straight line (the arc of
  a great circle) north 74° 32' 32" east 434,394 feet to a point (No. 171)
  in  latitude  41°  15'  31"  .321  and  longitude 72° 05' 24" .685, four
  statute miles true south of New London lighthouse; thence north 58°  58'
  43"  east  22,604 feet to a point (No. 172) in latitude 41° 17' 26" .341
  and longitude 72° 01' 10" .937, marked on the United States coast survey
  chart of Fisher's Island sound  annexed  to  said  memorandum,---  which
  point  is  on  the  long east 3/4 north sailing course drawn on said map
  1,000 feet true north from the Hammock  or  North  Dumpling  lighthouse;
  thence  following  said  east 3/4 north sailing course north 73° 37' 42"
  east 25,717 feet to a point (No. 173) in latitude 41° 18' 37"  .835  and
  longitude  71°  55' 47" .626, marked No. 2 on said map; thence south 70°
  07' 26" east 6,424 feet toward a point marked No. 3 on  said  map  until
  said  line  intersects  the westerly boundary of Rhode Island at a point
  (No. 174) in latitude 41° 18' 16" .249 and longitude 71° 54' 28" .477 as
  determined by the joint commissioners of Connecticut and Rhode Island by
  a memorandum of agreement dated March twenty-fifth, eighteen hundred and
  eighty-seven.
The geodetic positions given in this description are based on  Clark's
  spheroid  of  eighteen  hundred  and sixty-six and the astronomical data
  adopted by the United States  coast  and  geodetic  survey  in  eighteen
  hundred  and  eighty and are computed from data given in appendix number
  eight to the  report  of  the  said  survey  for  eighteen  hundred  and
  eighty-eight,   entitled   "Geographical   Positions  in  the  State  of
  Connecticut."
The boundary line hereinbefore described and determined which has been
  located and defined as, and in the manner, provided by section eight  of
  this  chapter  is  fully and accurately laid down on duplicate maps, one
  copy of which has been deposited with the  secretary  of  state  of  the
  state of New York and the other copy thereof with the secretary of state
  of the state of Connecticut.
Nothing  herein  contained  shall  be construed to affect any existing
  titles  to  property,  corporeal  or  incorporeal,  held  under   grants
  heretofore  made by either of said states, nor to affect existing rights
  which said states or either of them or which the citizens of  either  of
  said states may have by grant, letters-patent or prescription of fishing
  in  the  waters  of  said  sound,  whether  for  shell  or floating fish
  irrespective of the boundary line hereby established, it not  being  the
  purpose hereof to define, limit or interfere with any such right, rights
  or privileges whatever the same may be.
The  governor  is  authorized and requested to transmit a copy of this
  act to the governor of the state  of  Connecticut,  and  upon  receiving
  acknowledgment  of  its receipt by the state of Connecticut the governor
  of this state shall cause such acknowledgment to be filed in the  office
  of the secretary of state.
The  governor  of  this  state  is  authorized in concurrence with the
  governor of the state of Connecticut  to  communicate  to  congress  the

  action  of the two states on this subject and to request the approval of
  congress of the boundaries thus established and monumented.