Federal Register - August 18, 2021
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Source: Federal Register
Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Rules and Regulations 4 Data layers defining map units were created using a geographic information system GIS, which included species locations, roads, property boundaries, 2011 aerial photography, and U.S. Geological Survey 7.5 quadrangles. Points were placed on the GIS. We delineated critical habitat unit boundaries by starting with the cave or spring point locations that are occupied by the salamander. From these cave or springs points, we delineated a 984-ft 300-m buffer to create the polygons that capture the extent to which we estimate
the salamander populations exist through underground conduits. The polygons were then simplified to reduce the number of vertices, but still retain the overall shape and extent.
Subsequently, polygons that were within 98 ft 30 m of each other were merged together. Each new merged polygon was then revised to remove extraneous divots or protrusions that resulted from the merge process. The maps in this entry, as modified by any accompanying regulatory text, establish the boundaries of the critical habitat designation. The coordinates or plot
46565
points or both on which each map is based are available to the public at the Services internet site at http
www.fws.gov/southwest/es/
AustinTexas/, at http
www.regulations.gov at Docket No.
FWSR2ES20200048, and at the field office responsible for this designation. You may obtain field office location information by contacting one of the Service regional offices, the addresses of which are listed at 50 CFR
2.2.
5 Note: Index map follows:
BILLING CODE 433315P
Index Map: Georgetown Salamander Critical Habitat
Critical Habitat Unit B.oundaries 12-digit Watersh.ed Boundaries
-Highways 2
0
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from northwest to southeast, and there are several roads in the eastern part of the unit. A secondary road crosses the extreme southern portion of the unit,
PO 00000
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and there are residences in the northwestern, southwestern, and westcentral portions of the unit.
ii Map of Unit 1 follows:
E:FRFM18AUR2.SGM
18AUR2
ER18AU21.155
jbell on DSKJLSW7X2PROD with RULES2
6 Unit 1: Water Tank Cave Unit, Williamson County, Texas.
i Unit 1 consists of 68 ac 28 ha of private land in west-central Williamson County. A golf course crosses the unit
4
