NAD 1983 (2011) Amtrak NECCS21 (Intl Feet) - EPSG:20050

WKT

PROJCS["NAD_1983_(2011)_Amtrak_NECCS21_(ft)", 
	GEOGCS["GCS_NAD_1983_2011", 
		DATUM["D_NAD_1983_2011", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Hotine_Oblique_Mercator_Azimuth_Center"], 
	PARAMETER["False_Easting", 1500000.0], 
	PARAMETER["False_Northing", 1500000.0], 
	PARAMETER["Scale_Factor", 0.99999], 
	PARAMETER["Azimuth", 58.0], 
	PARAMETER["Longitude_Of_Center", -74.0], 
	PARAMETER["Latitude_Of_Center", 40.83333333333334], 
	UNIT["Foot", 0.3048]]

WKT2

PROJCRS["NAD_1983_(2011)_Amtrak_NECCS21_(ft)", 
	BASEGEOGCRS["GCS_NAD_1983_2011", 
		DYNAMIC[
			FRAMEEPOCH[2010.0], 
			MODEL["HTDP"]], 
		DATUM["D_NAD_1983_2011", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101], 
			ANCHOREPOCH[2010.0]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Hotine_Oblique_Mercator_Azimuth_Center", 
		METHOD["Hotine_Oblique_Mercator_Azimuth_Center"], 
		PARAMETER["False_Easting", 1500000.0, 
			LENGTHUNIT["Foot", 0.3048]], 
		PARAMETER["False_Northing", 1500000.0, 
			LENGTHUNIT["Foot", 0.3048]], 
		PARAMETER["Scale_Factor", 0.99999], 
		PARAMETER["Azimuth", 58.0], 
		PARAMETER["Longitude_Of_Center", -74.0], 
		PARAMETER["Latitude_Of_Center", 40.83333333333334]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Foot", 0.3048], 
	ID["EPSG", "20050"]]

Data from @esri/proj-codes

{
  "wkid": 20050,
  "latestWkid": 20050,
  "gcsWkid": 6318,
  "macro": "PE_PCS_NAD83_2011_AMTRAK_NECCS21_FT",
  "name": "NAD_1983_(2011)_Amtrak_NECCS21_(ft)",
  "wkt": "PROJCS[\"NAD_1983_(2011)_Amtrak_NECCS21_(ft)\",GEOGCS[\"GCS_NAD_1983_2011\",DATUM[\"D_NAD_1983_2011\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Hotine_Oblique_Mercator_Azimuth_Center\"],PARAMETER[\"False_Easting\",1500000.0],PARAMETER[\"False_Northing\",1500000.0],PARAMETER[\"Scale_Factor\",0.99999],PARAMETER[\"Azimuth\",58.0],PARAMETER[\"Longitude_Of_Center\",-74.0],PARAMETER[\"Latitude_Of_Center\",40.83333333333334],UNIT[\"Foot\",0.3048]]",
  "wkt2": "PROJCRS[\"NAD_1983_(2011)_Amtrak_NECCS21_(ft)\",BASEGEOGCRS[\"GCS_NAD_1983_2011\",DYNAMIC[FRAMEEPOCH[2010.0],MODEL[\"HTDP\"]],DATUM[\"D_NAD_1983_2011\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101],ANCHOREPOCH[2010.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Hotine_Oblique_Mercator_Azimuth_Center\",METHOD[\"Hotine_Oblique_Mercator_Azimuth_Center\"],PARAMETER[\"False_Easting\",1500000.0,LENGTHUNIT[\"Foot\",0.3048]],PARAMETER[\"False_Northing\",1500000.0,LENGTHUNIT[\"Foot\",0.3048]],PARAMETER[\"Scale_Factor\",0.99999],PARAMETER[\"Azimuth\",58.0],PARAMETER[\"Longitude_Of_Center\",-74.0],PARAMETER[\"Latitude_Of_Center\",40.83333333333334]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Foot\",0.3048],ID[\"EPSG\",\"20050\"]]",
  "description": "NAD 1983 (2011) Amtrak NECCS21 (Intl Feet)",
  "authority": "EPSG",
  "version": "10.076(13.1.0)",
  "deprecated": "no",
  "areaname": "USA - Amtrak NE corridor",
  "extent": {
    "slat": 38.64,
    "nlat": 42.74,
    "llon": -78.51,
    "rlon": -70.48
  }
}