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Federal Register / Vol. 86, No. 124 / Thursday, July 1, 2021 / Rules and Regulations
to their current conditions and likely suitability for reintroductions.
Accordingly, we are designating one unoccupied unit in the upper Santa Fe River and one unoccupied unit in the Withlacoochee River. As described below in the individual unit descriptions, each unit contains one or more of the physical or biological features and is reasonably certain to contribute to the conservation of the species.
General Information on the Maps of the Critical Habitat Designation The critical habitat streams were mapped with USGS National Hydrography Dataset GIS data. The high-resolution 1:24,000 flowlines were used to delineate the upstream and downstream boundaries of the critical habitat units and to calculate river kilometers and miles, according to the criteria explained below. The downstream boundary of a unit is the confluence of a named tributary stream or spring, below the farthest downstream occurrence record. The upstream boundary is the confluence of the first major tributary, road-crossing bridge, or a permanent barrier to fish passage above the farthest upstream occurrence record. The confluence of a large tributary typically marks a significant change in the size of the stream and is a logical and recognizable upstream terminus. Likewise, a dam or other barrier to fish passage marks the upstream extent to which mussels may disperse via their fish hosts. In the unit descriptions, distances between landmarks marking the upstream or
downstream extent of a stream segment are given in river kilometers km and equivalent miles mi, as measured tracing the course of the stream, not straight-line distance.
The areas designated as critical habitat include only stream channels within the ordinary high-water line.
States were granted ownership of lands beneath navigable waters up to the ordinary high-water line upon achieving statehood Pollard v. Hagan, 44 U.S. 3
How. 212 1845. Prior sovereigns or the States may have made grants to private parties that included lands below the ordinary high-water mark of some navigable waters that are included in this rule. Most, if not all, lands beneath the navigable waters included in this final rule are owned by the States of Florida and Georgia. The lands beneath most non-navigable waters included in this final rule are in private ownership.
There are no developed areas within the critical habitat boundaries except for transportation crossings, which do not remove the suitability of these areas for this species. The scale of the maps we prepared under the parameters for publication within the Code of Federal Regulations may not reflect the exclusion of such developed lands. Any such lands inadvertently left inside critical habitat boundaries shown on the maps of this rule have been excluded by text in the rule and are not designated as critical habitat. Therefore, a Federal action involving these lands would not trigger section 7 consultation with respect to critical habitat and the requirement of no adverse modification
unless the specific action would affect the physical or biological features in the adjacent critical habitat.
The critical habitat designation is defined by these maps, as modified by any accompanying regulatory text, presented at the end of this document in the text of the rule itself. We include more detailed information on the boundaries of the critical habitat designation in the preamble of this document. The coordinates on which each map is based are available at the Services internet site, https
www.fws.gov/panamacity, http
www.regulations.gov at Docket No.
FWSR4ES20190059, and at the field office responsible for this designation see FOR FURTHER
INFORMATION CONTACT above.
Final Critical Habitat Designation We are designating approximately 306
km 190 mi of stream channel in three units as critical habitat for the Suwannee moccasinshell. The three units we are designating as critical habitat are: Unit 1: Suwannee River, Unit 2: Upper Santa Fe River, and Unit 3: Withlacoochee River. About 81
percent of critical habitat for the Suwannee moccasinshell is already designated as critical habitat for either of two ESA-listed species: The oval pigtoe Pleurobema pyriforme or the Gulf sturgeon Acipenser oxyrinchus desotoi. The table below shows the critical habitat units for the Suwannee moccasinshell and ownership of riparian lands adjacent to the units.

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TABLE OF CRITICAL HABITAT UNITS FOR THE SUWANNEE MOCCASINSHELL
Ownership of riparian lands adjacent to the units is given for each streambank in kilometers km and miles mi. Lengths greater than 10
kilometers are rounded to the nearest whole kilometer and mile.
Bank
Private km mi
State km mi
County km mi
Unit length km mi
Unit 1: Suwannee River, FL
Right descending bank
Left descending bank

133 83
133 83

51 31
53 33

3.1 1.9
1.5 0.9

187 116.2

Total
Unit 2: Upper Santa Fe River, FL
Right descending bank
Left descending bank

266 165
34 21
26 16

103 64
8.4 5.2
13 8

4.6 2.9
0.4 0.3
3.6 2.2

43 26.7

Total
Unit 3: Withlacoochee River, FL and GA
Right descending bank
Left descending bank

61 38
58 36
53 33

22 13
17 11
22 14

4 2.5
0
0

75.5 46.9

Total

112 69

39 25

0

Note: Totals may not sum due to rounding.
Right and left descending bank is that bank of a stream when facing in the direction of flow or downstream.

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