NAD 1983 Idaho - Ada County (US Feet) - ESRI:102459

WKT

PROJCS["NAD_1983_Idaho-Ada_County", 
	GEOGCS["GCS_North_American_1983", 
		DATUM["D_North_American_1983", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 2625138.996430666], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", -115.75], 
	PARAMETER["Scale_Factor", 1.00011328], 
	PARAMETER["Latitude_Of_Origin", 41.66666666666666], 
	UNIT["Foot_US", 0.3048006096012192]]

WKT2

PROJCRS["NAD_1983_Idaho-Ada_County", 
	BASEGEOGCRS["GCS_North_American_1983", 
		DATUM["D_North_American_1983", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 2625138.996430666, 
			LENGTHUNIT["Foot_US", 0.3048006096012192]], 
		PARAMETER["False_Northing", 0.0, 
			LENGTHUNIT["Foot_US", 0.3048006096012192]], 
		PARAMETER["Central_Meridian", -115.75], 
		PARAMETER["Scale_Factor", 1.00011328], 
		PARAMETER["Latitude_Of_Origin", 41.66666666666666]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Foot_US", 0.3048006096012192], 
	ID["Esri", "102459"]]

Data from @esri/proj-codes

{
  "wkid": 102459,
  "latestWkid": 102459,
  "gcsWkid": 4269,
  "macro": "PE_PCS_NAD_1983_ID_ADA",
  "name": "NAD_1983_Idaho-Ada_County",
  "wkt": "PROJCS[\"NAD_1983_Idaho-Ada_County\",GEOGCS[\"GCS_North_American_1983\",DATUM[\"D_North_American_1983\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",2625138.996430666],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",-115.75],PARAMETER[\"Scale_Factor\",1.00011328],PARAMETER[\"Latitude_Of_Origin\",41.66666666666666],UNIT[\"Foot_US\",0.3048006096012192]]",
  "wkt2": "PROJCRS[\"NAD_1983_Idaho-Ada_County\",BASEGEOGCRS[\"GCS_North_American_1983\",DATUM[\"D_North_American_1983\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",2625138.996430666,LENGTHUNIT[\"Foot_US\",0.3048006096012192]],PARAMETER[\"False_Northing\",0.0,LENGTHUNIT[\"Foot_US\",0.3048006096012192]],PARAMETER[\"Central_Meridian\",-115.75],PARAMETER[\"Scale_Factor\",1.00011328],PARAMETER[\"Latitude_Of_Origin\",41.66666666666666]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Foot_US\",0.3048006096012192],ID[\"Esri\",\"102459\"]]",
  "description": "NAD 1983 Idaho - Ada County (US Feet)",
  "authority": "Esri",
  "version": "10.3.1",
  "deprecated": "no",
  "areaname": "Idaho - Ada County",
  "extent": {
    "slat": 43,
    "nlat": 43.85,
    "llon": -116.6,
    "rlon": -115.94
  }
}