A. 
The Town of Mamaroneck hereby designates the following areas as "critical environmental areas" (CEA) because of their exceptional or unique character pursuant to Section 617.4 of Title 6 of the New York Codes, Rules and Regulations:
(1) 
Premium River - Pine Brook Wetlands Complex.
(2) 
Hommocks - East Creek Wetlands Complex.
(3) 
Larchmont Reservoir - Sheldrake - Leatherstocking Freshwater Wetlands Complex.
B. 
These areas were previously adopted by the Town of Mamaroneck under Local Law No. 8 of 1986 and Local Law No. 4 of 1987. Each of these areas is more specifically set forth in a map and descriptions as attached.[1] The Premium River - Pine Brook Wetland Complex is described under its former title of the Premium Salt Marsh Complex, the Hommocks - East Creek Wetlands Complex includes descriptions of the Hommocks Salt Marsh Complex and the East Creek Area, and the Larchmont Reservoir - Sheldrake - Leatherstocking Freshwater Wetlands Complex is described under the same.
[1]
Editor's Note: Documents describing these areas are on file in the Town offices.
C. 
In all places where the Sheldrake or Premium Rivers or any stream, pond or tributary connecting thereto flow through or are located on private property, as shown on the Town of Mamaroneck Assessment Map, the critical environmental area is on the streambed of said river, tributary, pond or stream and all land within 10 feet of either side of the top of the streambanks.
A. 
General description. This area, totaling some 40 acres, consists of major parts of the Premium River, Premium Marsh and Premium Mill Pond and associated lands and waters nearby. Together with the smaller Pine Brook - Premium Border, an adjacent critical environmental area in the neighboring Village of Larchmont and similar marshlands and waters in the adjoining coastal section of New Rochelle, this complex constitutes an important coastal fish and wildlife habitat area, offers major aesthetic and recreational values and contributes to the mitigation of flooding through the capacity of the marsh to absorb stormwater. Being located at the south of the Pine Brook - Premium watershed, which drains highly developed residential and commercial areas, this complex requires protection against the adverse impact of flooding, siltation and pollution.
B. 
Detailed description. All block and lot numbers, rivers, ponds, riverbanks, boundaries, etc., referred to in this description are as shown on the Tax Assessment Maps of the Town of Mamaroneck.
(1) 
In Block 504: a strip of land, owned by the Town of Mamaroneck and forming part of the Premium River Construction Area dedicated by the Town, bounded on the west by Lots 580, 588 and 471, on the east and southeast by Block 506, on the south by Dillon Road and on the north by Block 505.
(2) 
In Block 505:
(a) 
All of Lots 229, 264 and 510, all of which are owned and dedicated by Town of Mamaroneck as parts of the Premium River Conservation Area.
(b) 
Also, those parts of Lots 433 and 446 bounded by a line beginning at the southeast corner of Lot 446 and coinciding with the eastern boundaries of both lots, as far as the northeast corner of Lot 433; thence running west along the north boundary of Lot 433 for 78.64 feet; thence southerly on a line perpendicular to the preceding line, crossing both of said lots to the south boundary of Lot 446; thence easterly along said south boundary to the starting point.
(c) 
Also, the northeasterly portion of Lot 218 bounded on the north and east by the north and east boundaries of said lot and on the southwest by two lines projected respectively approximately 80 feet from the northwest corner of the lot and approximately 90 feet from the southeast corner of the lot, both lines terminating and meeting at a point within the lot 22 feet distant from the nearest point on the north boundary of said lot.
(3) 
In Block 506:
(a) 
All of Lots 320, 325, 460 and 487 and so much of the streambed of the Premium River within said block as lies within the Town of Mamaroneck, all of which lands and waters are part of the Premium River Conservation Area owned and dedicated by the Town of Mamaroneck.
(b) 
Also, so much of Lot 147 as lies north and east of a line described as follows: Beginning at a point on the south boundary of Lot 320, 30 feet from the extreme west end of said boundary, thence southeasterly approximately 35 feet to the north end of the boundary line between Lot 147 and Lot 334; thence easterly and southerly along the boundary lines between Lot 147 on the one hand and Lots 334 and 324 and the first segment (78.82 feet) of the boundary line between Lot 147 and Lot 314; thence southeasterly on a line ending at the southeasterly most point in Lot 147.
(c) 
Also, so much of Lot 96 as lies to the north of a line described as follows: Beginning at the northwestern extremity of Lot 304; thence to the northeastern extremity of Lot 304; thence easterly 85 feet on a line drawn between the northeastern extremity of Lot 304 and a point on the southeastern boundary line of Lot 96 distant 179 feet from the south end of said boundary line; thence turning and running northeasterly approximately 110 feet on a line that meets said boundary line at a point 250 feet from its south end.
(4) 
In Block 507:
(a) 
So much of Lot 1 as lies north of a line described as follows: Beginning at the last point of meeting on the southeastern boundary line of Lot 96, Block 506, as described above, and continuing on the same bearing as that of the immediately preceding (approximately one-hundred-ten-foot) described line for a distance of 60 feet within Lot 1; thence turning and running due east approximately 45 feet to the northeastern lot boundary.
(b) 
Also, so much of the Premium River and its nearby banks as extends from the Village of Larchmont boundary on the easterly side to the nearest boundaries of Lots 1, 11, 22, 44, 66, 76 and 90 on the westerly side, and eastward and southward of said lots from the Village of Larchmont boundary to the New Rochelle boundary downstream to, and including, the bridge over the Premium River at Pryer Manor Road; and all land not otherwise here described in Block 507 lying within 10 feet of the Premium River bank.
(5) 
Premium Mill Pond: Adjoining Block 508, so much of the Premium Mill Pond (approximately 20 acres) as lies within the Town of Mamaroneck. Also, within Block 508, all land within 10 feet of the seawall abutting the Premium Mill Pond.
(6) 
Echo Bay: All Town of Mamaroneck waters in Echo Bay within or adjacent to Blocks 509 and 510 between the New Rochelle boundary and the southeast (Premium Point) shore of Echo Bay, and all land along the seawall on the Echo Bay shore of Premium Point in Blocks 509 and 510 lying within 10 feet of Echo Bay and northward of a line drawn across said bay from the western most extremity of Lot 50 in Block 510 westerly to the nearest point on the New Rochelle boundary, said line being the southern (seaward) boundary of this critical environmental area.
A. 
General description. This area, totaling some 14 acres, includes all lands and adjacent waters within, and certain land directly upstream from, the Hommocks Conservation Area, of which approximately four acres are within the Town of Mamaroneck and are owned by it and dedicated by it as parkland and open space. Together with an adjacent critical environmental area in the Village of Larchmont known as the "Hommocks Border" and with a portion of the Hommocks Conservation Area lying across the boundary in the Village of Mamaroneck and similarly dedicated by that village, this complex constitutes an important coastal fish and wildlife habitat area, offers major aesthetic and recreational values and therefore merits special protection from adverse impact of future action in the highly developed residential and commercial areas immediately upstream.
B. 
Detailed description. All block and lot numbers, water bodies and other geographical features referred to below are as shown on the Tax Assessment Maps of the Town of Mamaroneck.
(1) 
Hampshire Area. In Block 414, all of Lot 20, comprising that part of the Hampshire Country Club property (6.74 acres) lying within the unincorporated area of the Town of Mamaroneck.
(2) 
Hommocks Marsh and Hommocks Peninsula Area. In Blocks 415, 416 and 417, connected lands and waters consisting of the Town of Mamaroneck portion (approximately four acres) of the Hommocks Conservation Area and waters extending from it southwestward and southward around part of the Hommocks Peninsula into Larchmont Harbor, the whole being bounded as follows: Beginning in Block 415 at a point on the southwest side of Hommocks Road 271.69 feet northwest of the intersection between said southwest side of Hommocks Road and the boundary of the Village of Mamaroneck, and running thence southwesterly 70 feet on a line perpendicular to Hommocks Road; thence turning and running southerly approximately 415 feet to the eastward end of the retaining wall separating the Hommocks athletic field from the Hommocks Marsh; thence turning and running southwesterly 142.64 feet along the whole length of the retaining wall to the boundary of the Village of Larchmont; thence turning and running southerly along said boundary to the point on said boundary nearest to the southernmost point of land in Block 417, Lot 41; thence turning 90° eastward and running easterly to said point of land in Block 417, Lot 41; thence turning and running irregularly northwest, north and east along the shoreline of the Hommocks Peninsula, following the water grant line or, where none is shown, the high-water mark, past Lots 41 and 1 in Block 417 and Lots 1, 36, 75, 86, 112 and 136 in Block 416; thence turning and running northerly along the Village of Mamaroneck boundary to the intersection with the southwest side of Hommocks Road; thence along said southwest side of Hommocks Road 271.69 feet to the point of beginning.
(3) 
East Creek Area. In Block 411, portions of Lots 249 and 280, so much of the open portion of East Creek (flowing easterly then northeasterly, from the Boston Post Road to the point of inflow into an underground pipe near the Hommocks School parking area) as lies within the unincorporated area of the Town of Mamaroneck and all land within the Town of Mamaroneck located within 10 horizontal feet of the bank of East Creek at mean high tide.
A. 
General description of component parts and their value to the community.
(1) 
This complex consists of five areas of open space in the unincorporated area of the Town, together with connecting water bodies (streams, ponds and drainage ditches) and land margins immediately adjacent to such water bodies as provided herein. All these parts of the complex are situated in the Sheldrake River watershed. Together, they constitute an important fish and wildlife habitat complex (see Policy 7/7A of the Town of Mamaroneck - Village of Larchmont Local Waterfront Revitalization Program). The open spaces in the complex provide water-retention capacity which contributes to the lessening of flooding and erosion in downstream parts of the watershed; they also provide visual relief and associated recreational values in this highly developed area. The wetlands and water bodies in the complex, in view of their ecological, drainage and related educational and recreational values, require special protection from flooding, siltation, pollution and other types of adverse impact.
(2) 
The total area of the complex is approximately 529 acres.
B. 
Summary of component parts.
(1) 
The component parts of the complex can be summarized as follows:
(a) 
The Winged Foot Holding Corporation property, chiefly a golf course: area of 280.07 acres.
(b) 
Open space in the Bonnie Briar Holding Corporation property, chiefly a golf course: area of approximately 150 acres.
(c) 
The Town of Mamaroneck portion (12.76 acres) of the Larchmont Reservoir - James G. Johnson Jr. Conservancy, dedicated open space owned by the Village of Larchmont.
(d) 
The Sheldrake and Leatherstocking Conservation Area (dedicated parkland of the Town of Mamaroneck): 55 acres.
(e) 
The Badger Sports Club property: 7.53 acres.
(f) 
All parts of the Sheldrake River located in the unincorporated area of the Town outside the boundaries of the open space areas identified in Subsections B(1)(a) through (e), including the West Branch, East Branch and main stem of the river and all open streams and ponds tributary thereto, together with all land within 10 feet of the nearest bank or edge of such tributary stream or pond, and all drainage easements or Town of Mamaroneck parklands, not otherwise identified herein, containing natural or manmade watercourses or drainage ditches flowing into the river or its tributaries: estimated total area of approximately 24 acres.
(2) 
All open space areas and all ponds, streams, drainage ditches and parklands in this complex are described in Part C below on the basis of boundaries and locations shown on the Tax Assessment Maps of the Town of Mamaroneck.
C. 
Detailed description.
(1) 
Winged Foot area, northeast of Fenimore Road.
(a) 
All of Block 347, consisting entirely of the Winged Foot Holding Corporation property: 280.07 acres.
(b) 
In Block 344, the entire streambed intersecting Lots 112, 99 and 86, and so much of said lots as lies within 10 feet of either streambank.
(c) 
In Block 346, all parts of a pond extending eastward from Block 347 into Lots 65 and 94, and all land in said lots within 10 feet of the edge of said pond; also, a pond intersected by the boundary between Lots 325 and 94 and all land in said lots within 10 feet of the edge of said pond.
(d) 
In Block 315, two ponds and connecting streams flowing southeasterly through Lots 348, 235, 802, 144, 213 and 171 into the Leatherstocking Conservation Area, and all land in said lots within 10 feet of the edge of either pond or either bank of said streams.
(e) 
In Block 312, two streams entering Lot 1 from Block 309 to the north and east, joining within Lot 1 and flowing thence southwesterly to Fenimore Road; and all land in said lot within 10 feet of either bank of either of said streams.
(f) 
In Block 325, a pond intersected by the boundary between Lots 81 and 92, and all land in said lots within 10 feet of the edge of said pond.
(g) 
In Block 307, drainage easement 25 feet wide running southerly through the east ends of Lots 88, 73, 63 and 51, then crossing Lot 51 in a southwesterly direction, then following the west ends of Lots 40, 26, 13 and 1 and ending at Kolbert Drive.
(h) 
In Block 308, a continuation of the drainage easement from Block 307, running parallel to Kolbert Drive across the west ends of Lots 146, 132, 118, 106, 93 and 89; and a stream flowing from said drainage easement through a parcel owned by the Town of Mamaroneck known as "Parcel A" to the south boundary of said block; and all land within 10 feet of said stream, all watercourses described in this block being part of the East Branch of the Sheldrake River.
(i) 
In Block 305, the streambed of the Sheldrake River (East Branch) as it enters the Town from Scarsdale and flows southerly across Lot 903, crosses the northeast corner of Lot 922 and reenters Lot 903, then crosses Lots 5, 1057 and 15.
(j) 
In Block 301, a pond, together with a stream draining the pond, in Lot 73, and another stream originating southwest of said pond in the northeast corner of Lot 1 which then crosses the southernmost corner of Lot 73; both streams then flowing into a tributary of the East Branch of the Sheldrake River in the adjoining Block 302; and all land within 10 feet of the edge of said pond or the bank of either of said streams.
(k) 
In Block 302, several streams tributary to the East Branch of the Sheldrake River which enter Block 302 from Blocks 301 and 304 and flow generally southward in Lots 500, 54 and 1, or along or near the boundary between Lot 54 on the east and Lots 500 and 1 on the west; and another stream flowing from Lot 70 into Lots 54 and 1; and all land within 10 feet of the banks of said streams.
(2) 
Bonnie Briar area, southwest of Fenimore Road.
(a) 
In Block 225, all of Lot 1, property of the Bonnie Briar Holding Corporation [one hundred forty-one and four-hundredths (141.4) acres].
(b) 
In Block 201, all of Lot 19, property of the Bonnie Briar Holding Corporation (8.59 acres).
(c) 
In Block 309, a stream, part of the East Branch of the Sheldrake River, flowing southwesterly through Lots 10, 9, 8, 7, 6, 27, 28 and 29, and ponds and retention areas in or partly in Lots 10, 19, 20, 23, 24, 25, 28 and 30; and all land within 10 feet of said stream, ponds and retention areas.
(d) 
In Block 226, a tributary of the East Branch of the Sheldrake River as it flows southeasterly from Block 225, intersecting Lots 1 and 258, then flowing along or near their boundaries with Fenimore Road, then intersecting Lots 232, 55 and 98; and all land within 10 feet of the bank of said stream.
(e) 
In Block 228, a drainage easement 25 feet wide intersecting Lots 360 and 375 east of York Road, such easement including the course of a portion of the East Branch of the Sheldrake River; the East Branch of the Sheldrake River as it flows through Lots 27, 46 and 75, and all land within 10 feet of the river bank in said lots; and all of Lots 78 and 156, which lots are parkland owned by the Town of Mamaroneck, through which the East Branch of the Sheldrake River flows southward into the Sheldrake River Conservation Area.
(f) 
In Block 222, the West Branch of the Sheldrake River as it flows eastward out of Block 225 into Lot 627 where it changes course and flows south, then west, then southerly along or near the boundary between Lots 627, 606 and 585 on the east bank and Lots 536 and 546 on the west bank, then flows under a bridge at Bonnie Briar Lane and continues southerly along or near the boundary between Lots 194 and 205 on the east bank and Lots 235 and 246 on the west bank, from which point it enters the Sheldrake River Conservation Area; and all land within 10 feet of the bank of said West Branch as it follows the course in Block 222 herein described.
(3) 
Larchmont Reservoir area.
(a) 
In Block 103, all of that portion (12.76 acres) of the Larchmont Reservoir - James G. Johnson Jr. Conservancy lying within the Town of Mamaroneck, being property of the Village of Larchmont dedicated by it as permanent open space.
(b) 
In Block 104, all portions of tributaries of the West Branch of the Sheldrake River in Lots 273 and 265 and on Bonnie Way parallel to the east boundary of Lot 288; also, a tributary of the West Branch of the Sheldrake River as it emerges on the surface and flows east, then north, across Lots 44, 52, 68, 76, 84 and 92 then enters Lot 119 where it flows into the West Branch west of Weaver Street; and all land within 10 feet of the banks of said tributaries.
(4) 
Sheldrake and Leatherstocking Conservation Areas.
(a) 
The entirety of the Sheldrake and Leatherstocking Conservation Areas, comprising approximately 55 acres of parkland, the property of and dedicated by the Town of Mamaroneck, extending in an approximately east-west direction through Blocks 105, 106, 222 and 224; thence between Blocks 229 and 228 on the north and 210 on the south; thence through Block 209, thence northeasterly along the boundary between Blocks 204 and 208, thence northeasterly through Block 205 to Fenimore Road; thence east of Fenimore Road across Blocks 314 and 320 to the Village of Mamaroneck boundary at Old White Plains Road.
(b) 
Also in Block 105 but outside the conservation areas described in the preceding subsection, tributaries of the Sheldrake River flowing southerly from Bonnie Way and passing through Lots 910, 511, 521 and 531; and all land within 10 feet of the bank of any of said tributaries.
(5) 
Lower Sheldrake River area south of Sheldrake - Leatherstocking Conservation Areas.
(a) 
West Branch:
[1] 
In Block 222, the West Branch of the Sheldrake River flowing through Lots 279 and 286 parallel to Brookside Place and thence under a bridge at Rockland Avenue; and all land within 10 feet of the bank of said West Branch.
[2] 
In Block 221, the West Branch of the Sheldrake River flowing southeasterly along or near the boundaries between Lots 92, 86, 78, 72, 62, 54, 46, 41, 33, 28 and 13 on the east (Sheldrake Avenue) side and Lots 121, 127, 134, 141, 154, 159, 167, 177 and 7 on the west (Weaver Street) side, and flowing thence under a bridge at Forest Avenue; and all land within 10 feet of the bank of said West Branch.
[3] 
In Block 220, the West Branch of the Sheldrake River flowing southeasterly along or near the boundaries between Lots 468, 481 and 487 on the west (Weaver Street) side and Lot 445 on the north (Forest Avenue) side; thence crossing the north end of Lot 487 and the west end of Lot 206; thence flowing easterly through Lot 212 and under a bridge at Briarcliff Road; all of Lot 212, being Town of Mamaroneck property; and all land in other lots named in this subsection that is within 10 feet of the bank of said West Branch.
[4] 
In Block 219, the continuation of the West Branch of the Sheldrake River flowing easterly in and near the north boundary of Lot 206, thence through Lot 227 and along the midline of Brookside Drive to the confluence with the East Branch near the south end of Valley Stream Road; all of Lot 227 which is Town of Mamaroneck property; and all land in Block 219 within 10 feet of the bank of said West Branch.
(b) 
East Branch:
[1] 
In Block 210, the East Branch of the Sheldrake River as it flows southerly from Rockland Avenue along or near the boundary dividing Lots 328 and 35 on the west from Lots 588 and 789 on the north; all of Lot 789, being open space property of the Badger Sports Club (7.53 acres); the East Branch of the Sheldrake River as it continues southeasterly through the northern parts of Lots 45, 87 and 240, enters the midline of Valley Stream Road and flows irregularly southward to the confluence with the West Branch at Brookside Drive; and all land within 10 feet of the bank of said East Branch.
(c) 
Main Stem:
[1] 
In Blocks 219, 218 and 217, the Sheldrake River as it flows southeasterly between West Brookside Drive and East Brookside Drive to the bridge at Hickory Grove Drive; and all land within 10 feet of the bank of said river.
[2] 
In Block 214, the Sheldrake River as it flows southeasterly into and through Lot 1, widening out in that lot and flowing thence under a bridge at Lakeside Drive; and all land within 10 feet of the bank of said river.
[3] 
In Block 215, all of Lot 518, which is Town of Mamaroneck property including the entirety of Gardens Lake (formerly known and mapped as "Lake Sheldrake"); the Sheldrake River as it flows northerly from Gardens Lake along or parallel to North Brook road; and all land in said Block 215 not otherwise included in this description that lies within 10 feet of the bank of said river.
[4] 
In Block 214, the Sheldrake River as it flows northerly along or parallel to North Brook Road; all land within 10 feet of the bank of said river in that location; a drainage easement in Lot 545 through which said river flows and from which it flows under Interstate Route 95 (the New England Thruway); and all of Lot 483, which is Town of Mamaroneck property southeast of Route I-95 through which said river flows across the boundary of the Village of Mamaroneck.