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Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Rules and Regulations
Unit 1: Water Tank Cave Unit Unit 1 consists of approximately 68 ac 28 ha of private land in west-central Williamson County, Texas. A golf course crosses the unit 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, and there are residences in the northwestern, southwestern, and west-central portions of the unit. This unit contains Water Tank Cave, which is occupied by the Georgetown salamander. Only subsurface critical habitat was designated for this cave population. The unit contains the physical or biological features essential for the conservation of the species.
Unit 2: Hogg Hollow Spring Unit Unit 2 consists of approximately 122
ac 49 ha of U.S. Army Corps of Engineers land and private land in Williamson County, Texas. The unit is located south of Lake Georgetown and is mostly undeveloped. The northwestern part of the unit includes Sawyer Park, part of the Lake Georgetown recreation area. This unit contains two springs:
Hogg Hollow Spring and Hogg Hollow 2 Spring, which are occupied by the Georgetown salamander. Hogg Hollow Spring is located on Hogg Hollow, and Hogg Hollow 2 Spring is located on an unnamed stream, both tributaries to Lake Georgetown. The unit contains the physical or biological features essential for the conservation of the species.

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Unit 3: Cedar Hollow Spring Unit Unit 3 consists of approximately 68 ac 28 ha of private land in west-central Williamson County, Texas. A secondary road crosses the extreme southern portion of the unit, and there are residences in the northwestern, southwestern, and west-central portions of the unit. This unit contains Cedar Hollow Spring, which is occupied by the Georgetown salamander. The spring is located on Cedar Hollow, a tributary to Lake Georgetown. The unit contains the physical or biological features essential for the conservation of the species.
Unit 4: Lake Georgetown Unit Unit 4 consists of approximately 134
ac 54 ha of Federal and private land in west-central Williamson County, Texas.
Part of the unit is the U.S. Army Corps of Engineers Lake Georgetown property.
There are currently no plans to develop the property. There is some control of public access. Unpaved roads are found in the western portion of the unit, and a trail begins in the central part of the unit and leaves the northeast corner. A

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secondary road crosses the extreme southern portion of the unit, and there are residences in the northwestern, southwestern, and west-central portions of the unit. A large quarry is located a short distance southeast of the unit.
This unit includes two springs, Knight Crockett Gardens Spring and Cedar Breaks Hiking Trail Spring, which are occupied by the Georgetown salamander. The springs are located on an unnamed tributary to Lake Georgetown. A portion of the northern part of the unit extends under Lake Georgetown. The unit contains the physical or biological features essential for the conservation of the species.
Unit 5: Buford Hollow Spring Unit Unit 5 consists of approximately 68 ac 28 ha of Federal and private land in west-central Williamson County, Texas.
The unit is located just below the spillway for Lake Georgetown. The U.S.
Army Corps of Engineers owns most of this unit as part of Lake Georgetown.
The D.B. Wood Road, a major thoroughfare, crosses the eastern part of the unit. The rest of the unit is undeveloped. This unit contains Buford Hollow Springs, which is occupied by the Georgetown salamander. The spring is located on Buford Hollow, a tributary to the North Fork San Gabriel River. The unit contains the physical or biological features essential for the conservation of the species.
Unit 6: Swinbank Spring Unit Unit 6 consists of approximately 68 ac 28 ha of City and private land in westcentral Williamson County, Texas. The unit is located near River Road south of Melanie Lane. The northern part of the unit is primarily in residential development, while the southern part of this unit is primarily undeveloped. This unit contains Swinbank Spring, which is occupied by the Georgetown salamander. The spring is located just off the main channel of North Fork San Gabriel River. The unit contains the physical or biological features essential for the conservation of the species. The population of Georgetown salamanders in the spring is being monitored monthly as part of the Williamson County Regional HCPs efforts to conserve the species.
Unit 7: Avant Spring Unit Unit 7 consists of approximately 68 ac 28 ha of private land in west-central Williamson County, Texas. The northern part of a large quarry is along the southwestern edge of the unit. The rest of the unit is undeveloped. This unit contains Avants Capitol Aggregates Spring, which is occupied
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by the Georgetown salamander. The spring is close to the streambed of the Middle Fork of the San Gabriel River.
The unit contains the physical or biological features essential for the conservation of the species.
Unit 8: Shadow Canyon Spring Unit Unit 8 consists of approximately 68 ac 28 ha of City and private land in westcentral Williamson County, Texas. The unit is located just south of State Highway 29. This unit contains Shadow Canyon Spring, which is occupied by the Georgetown salamander. The spring is located on an unnamed tributary of South Fork San Gabriel River. The unit contains the essential physical or biological features for the conservation of the species. The unit is authorized for development under the Shadow Canyon HCP. Impacts to the endangered goldencheeked warbler Dendroica chrysoparia and Bone Cave harvestman Texella reyesi are permitted under the Shadow Canyon HCP; however, impacts to Georgetown salamander are not covered under the HCP.
Unit 9: Garey Ranch Spring Unit Unit 9 consists of approximately 68 ac 28 ha of private land in Williamson County, Texas. The unit is located north of RM 2243. The unit is mostly undeveloped. A small amount of residential development enters the southern and eastern parts of the unit.
This unit contains Garey Ranch Spring, which is occupied by the Georgetown salamander. It is located on an unnamed tributary to the South Fork San Gabriel River. The unit contains the physical or biological features essential for the conservation of the species.
Salado Salamander Critical habitat units for the Salado salamander may require special management because of the potential for groundwater pollution from current and future development in the watershed, present operations and future expansion of quarrying activities, depletion of groundwater, and other threats see Special Management Considerations or Protection, above. All units are considered to be occupied by the Salado salamander. The designation includes the spring outlets and outflow up to the high-water mark and 262 ft 80 m of upstream and downstream habitat.
Units are further delineated by drawing a circle with a radius of 984 ft 300 m around the spring, representing the extent of the subterranean critical habitat. For cave populations of the Salado salamander, the unit is delineated by drawing a circle with a radius of 984 ft 300 m around the
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