B08_Section_J_Attachment_11_Coral_and_Seagrass_Survey.pdf

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FORT JEFFERSON

Coral and Seagrass Survey

Fort Jefferson Coral and Seagrass Survey / DRTO 244370

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Contents Introduction Survey Methodology

Counterscarp Survey

Moat Survey

Moat Pedestrian Bridge Survey

Seagrass Desktop Mapping and Ground Truthing

Results Counterscarp Survey

Species List, Size Class, and Distribution Counterscarp Breaches:

Counterscarp Breach Area 1 Survey Counterscarp Breach Area 2 Survey

Moat Survey

Moat Survey Area 1 Moat Survey Area 2

Pedestrian Bridge Footings Survey

Seagrass Ground Truthing

Appendix A Counterscarp Survey Coral Locations and Measurements Appendix B Counterscarp Survey Representative Photos- Appendix C - Moat Survey Representative Photo

Figure 1 - Project Location Figure 2 - Survey Location Figure 3 - Counterscarp Survey- Coral Density Figure 4 – Counterscarp Survey - Pseudodiploria clivosa Density Figure 5 - Counterscarp Breach 1 Survey - Coral Locations Figure 6 - Counterscarp Breach 2 Coral Locations Figure 7 - Moat Survey Areas Figure 8 - Moat Seagrass Polygons Figure 9 - Pedestrian Bridge Footings Figure 10 - Typical Pedestrian Bridge Footing Face Identifiers Figure 11 - Pedestrian Bridge Footings Survey Coral Locations Figure 12 - Classified Image Figure 13 - Updated Image Classification and Ground Truthing Transects

Table 1 – Counterscarp Survey Species Observed Table 2 - Counterscarp Survey - Coral Species Abundance and Size Class Table 3 – Countourscarp Survey - Coral Size Class and Surface Area Table 4 – Counterscarp Survey - Coral Species and Number of Occurrences by Transect Table 5 - Counterscarp Breach 1 Survey - Coral Species Data Table 6 - Counterscarp Breach 2 Survey – Coral Species Data

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Table 7 - Moat SAV Coverage and Species Table 8 - Counterscarp Pedestrian Bridge Survey Corals Table 9 - Pedestrian Bridge Corals Table 10 - Seagrass Ground Truthing Acreages

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Introduction On November 14th through 19th of 2019 and July 16th through 21st of 2020, Schneider Engineering Consulting (SEC) conducted a Coral and Benthic Habitat Survey at Fort Jefferson, Florida (Please refer to figure 1 - Project Location). The coral survey identified stony corals and octocorals growing on the counterscarp, mapped the resources within the moat, inspected four (4) footings of the pedestrian bridge and ground truthed an aerial interpretation of seagrass coverage immediately surrounding the counterscarp. The survey was conducted by the following marine scientists: Benjamin Brice (SEC), Leigh Ann Cannon (Jacobs), and Joshua Kohlbecker (Cooper K Environmental). During the survey, a total of ± 1,700 linear feet of counterscarp was inspected.

Water depth ranged from 3 feet to 10 feet. While visibility ranged from 3 feet to 20 plus feet horizontally.

Figure 1 - Project Location

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Survey Methodology

Counterscarp Survey

The survey starting point was located at the southern interface of the counterscarp and Garden key Station 0+00 (established and located via a Trimble GEO XH 6000 GPS unit). A 100-foot fiberglass measuring tape was then used to establish the transect. Throughout the length of the survey, GPS points were collected on 100-foot intervals. The transect tape was then used to establish horizontal locations for the species observed. The vertical depth of the species was obtained by measuring the distance from the center of the species to surface of the water. This data was then correlated with tidal level for the date and time of measurement. A buffer of 3 feet was used for species identification beyond the main portion of the counterscarp. As a result of previous storm damage, there are 2 breaches in the counterscap. At the location of the breaches the buffer was increased to 10 feet beyond the counterscarp and the corresponding interior portion of the moat was surveyed for resources. . The inspections were conducted by divers utilizing a surface-supplied air system; a surface tender collected and organized data as relayed from the divers.

The diameter of coral colonies were measured in centimeters (cm) using a metric ruler. For colonies greater than 10 cm in diameter, the length, width, and height were recorded along with the horizontal and vertical locations. Representative photographs were also collected. Divers logged the location, depth, size, and species identification onto data sheets.

Moat Survey

Within the moat surrounding the fort, diver transects were utilized to identify limits of Submerged Aquatic Vegetation (SAV). Present species and estimates of coverages were recorded during the surveys and at areas of significate changes in SAV coverage. The limits of the observed seagrasses were recorded via the Trimble GEO XH 6000 unit, with representative photos collected throughout the survey area. A series of seagrasswath.org photographs that reflected percent coverage were used as a standard for seagrass percent coverage estimations.

Moat Pedestrian Bridge Survey

Starting with the southernmost footing of the bridge, all four sides of each footing were examined from the Mean High Water Line (MHWL) to the sediment surface for the presence of any hard or soft corals. In addition to the footings, the counterscarp was surveyed from the vicinity of the pedestrian bridge connection to the uplands. The location of any hard or soft corals observed was recorded based on the footing number and compass direction for the face of the footing. All specimens located were photographed and the length, width, and height were recorded.

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Seagrass Desktop Mapping and Ground Truthing

Waterward of the counterscarp, a desktop aerial interpretation of seagrass coverage was conducted on the most recent georectified aerial availbe. The aerial was obtained from NOAA Office for Costal Management, dated 2017. The image was analyzed via the image classification tool in ArcGIS 10.3 which allows the user to assign coverage or land type classes to known signatures.

The software can then be used to create a coverage map. The results of this interpretation were ground truthed by divers via a series of randomly chosen transects. A series of 37 transects were established in ArcGIS on 50-foot intervals along the counterscarp, starting at the southwestern corner. Each transect was assigned a number, 1 through 37, starting at the southwest corner of the counterscarp. A random number generator, restricted to 1 – 37, was then used to identify 7 transect numbers. The 7 transects equate to 18 percent of the total transects. Transects lengths were correlated to the limits of a Bathymetric survey conducted at this site by ATKINS North America, Inc. and a standardized length of 250 feet was used for the purpose of ground truthing. Along each of the 7 selected transects, the endpoints were established utilizing a Trimble GEO XH 6000 unit with a 300’ foot tape stretched between the established points. A team of divers then swam the length of each transect and recorded where the SAV started and stopped along the total length of transect. Species composition and estimated density were also recorded. Results of the ground truthing were then used to validate and update the desktop interpretation of the SAV limits within the area surrounding the fort.

Please see figure 2 for the locations of the different survey components.

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Figure 2 - Survey Location

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Results

Counterscarp Survey

The counterscarp survey was initiated on the southwest side of the fort where the counterscarp intersects the beach at Garden Key. A total of 4,151 individual colonies were identified during the survey. Within the total of 4,151 colonies, 2,407 hard coral colonies and 1,744 soft coral colonies were identified. These colonies included 16 hard coral species and 16 soft coral species. Species identified and the quantity of each species is presented in Table 1.

Table 1 – Counterscarp Survey Species Observed

Table 1 ‐Counterscarp Survey ‐ Species Observed

Species Number of occurrences

Species Number of occurrences

Antillogorgia americana So 177 Oculina diffusa St 2

Antillogorgia rigida So 43 Orbicella faveolata St 13

Colpophyllia natans St 7 Palythoa caribaeorum So 115

Dichocoenia stokesii St 7 Plexaurella grisea So 43

Diploria labyrinthiformis St 1 Plexaurella nutans So 79

Eunicea flexuosa So 723 Porites astreoides St 48

Eunicea knighti So 30 Porites porites St 7

Eunicea palmeri So 9 Pseudodiploria clivosa St 2029

Eunicea succinea So 34 Pseudodiploria strigosa St 214

Eunicea tayrona So 1 Pseudoplexaura cruscis So 91

Gorgonia ventalina So 331 Pseudoplexaura porosa So 1

Leptoseris cucullata St 1 Pseudoplexaura wagenaari So 1

Manicina areolata St 1 Pterogorgia anceps So 10

Meandrina meandrites St 2 Siderastrea radians St 5

Millepora alcicornis St 68 Siderastrea sidera St 1

Muricea muricata So 56 Solenastrea bournoni St 1

* Stony Coral (St), Soft Coral (So)

Coral density was observed to increase towards the center point of the counterscarp wall (station 09+00), with the peak density occurring from transects 9+00 through 13+00 (figure 3). This coincided with the presence of the sheet pile wall that was observed to begin around station 9+00 and terminated at station 16+72 The sheet pile wall was installed 3 feet to 4 feet off the existing counterscarp brick-and-mortar wall, and the space between the two structures has been filled thereby creating a flat shelf between the counterscarp and the sheet pile wall. The sheet pile wall and associated fill area extended to within 1 foot to 3 feet of the surface of the water, depending on the tidal cycle. Locations of the corals observed on the shelf were recorded but no measurements were recorded given the limited water depth and wave action during the survey.

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Figure 3 - Counterscarp Survey- Coral Density

The most numerous species observed along the wall was Pseudodiploria clivosa with 2,029 colonies counted. As with the general trend of coral density observed, Pseudodiploria clivosa peak density occurred between stations 9+00 to 14+99 (figure 4).

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Figure 4 – Counterscarp Survey - Pseudodiploria clivosa Density

Because of the extreme density of the Pseudodiploria clivosa on transects 9+00 through the end of transect 14+00, only the number of colonies observed was recorded. Pseudodiploria clivosa was estimated to have upwards of 80% coverage of the sheet pile wall on these transects with a peak density of 428 colonies within a 100 foot transect. Due to inclement weather and limited

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only species counts are available for that transect.

Species List, Size Class, and Distribution

As mentioned previously, 4,151 colonies consisting of 32 species were identified during the survey. Table 2 presents the abundance and size classes of the identified species. The size class indicated in the table relates to the maximum dimension of each colony measured.

Table 2 - Counterscarp Survey - Coral Species Abundance and Size Class

Table 2 – Counterscarp Survey ‐ Coral Species Abundance and Size Class

Size Class (cm) No

Measurement* 0 to <10

10 to <15

15 to <20

20 to <40

40 to <50 50+ Total

Species Name

Antillogorgia americana 41 0 2 5 60 29 40 177

Antillogorgia rigida 3 0 1 1 21 8 9 43

Colpophyllia natans 1 0 0 0 4 1 1 7

Dichocoenia stokesii 2 0 1 2 2 0 0 7

Diploria labyrinthiformis 0 0 0 0 0 1 0 1

Manicina areolata 0 0 1 0 0 0 0 1

Eunicea flexuosa 188 7 9 44 317 77 81 723

Eunicea knighti 0 1 1 1 17 7 3 30

Eunicea palmeri 1 0 1 4 3 0 0 9

Eunicea succinea 17 1 0 0 11 4 1 34

Eunicea tayrona 0 0 0 0 0 1 0 1

Gorgonia ventalina 85 0 6 14 120 56 50 331

Leptoseris cucullata 0 0 0 0 0 0 1 1

Meandrina meandrites 0 0 0 1 1 0 0 2

Millepora alcicornis 10 0 4 1 23 7 23 68

Muricea muricata 10 2 2 9 29 2 2 56

Oculina diffusa 0 1 0 1 0 0 0 2

Orbicella faveolata 2 0 3 1 5 1 1 13

Palythoa caribaeorum 36 0 1 2 14 4 58 115

Plexaurella grisea 2 0 0 4 23 7 7 43

Plexaurella nutans 29 0 2 2 29 11 6 79

Porites astreoides 11 7 10 7 11 1 1 48

Porites porites 0 5 1 0 1 0 0 7

Pseudodiploria clivosa 1771 3 6 8 87 59 95 2029

Pseudodiploria strigosa 79 1 6 16 65 24 23 214

Pseudoplexaura cruscis 14 0 0 8 43 10 16 91

Pseudoplexaura porosa 0 0 0 0 1 0 0 1

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Table 2 – Counterscarp Survey ‐ Coral Species Abundance and Size Class

Size Class (cm) No

Measurement* 0 to <10

10 to <15

15 to <20

20 to <40

40 to <50 50+ Total

Species Name

Pseudoplexaura wagenaari 0 0 0 0 0 0 1 1

Pterogorgia anceps 5 0 1 1 3 0 0 10

Siderastrea radians 0 1 0 2 2 0 0 5

Siderastrea sidera 1 0 0 0 0 0 0 1

Solenastrea bournoni 0 0 0 0 0 0 1 1

TOTAL BY CLASS SIZE 2308 29 58 134 892 310 420 4151

* Colonies with no measurement were either located on shelf area or within transect 9+00 to 10+00

Table 3 represents the species segregated into those larger than 15 cm in any dimension and presents the total surface area in centimeters2 for those colonies. Additionally, the table presents the number of corals larger than 15 cm broken down into stony and soft corals and the surface area (cm2) for each category.

Table 3 – Countourscarp Survey - Coral Size Class and Surface Area

Table 3 ‐ Countourscarp Survey ‐ Coral Size Class and Surface Area

SIZE CLASS

Total Corals <15 cm dia or max.

dimension

Total Surface Area (cm2) corals <15 cm

Total Soft Corals <15 cm dia or max.

dimension

Total Stony Corals <15 cm dia or max.

dimension

Total Surface Area (cm2) Soft Corals

Total Surface Area (cm2) Stony Corals

Species Name

Antillogorgia americana 134 235,006 134 235,006

Antillogorgia rigida 39 45,033 39 45,033

Colpophyllia natans 6 7,604 6 7,604

Dichocoenia stokesii 4 1,803 4 1,803

Diploria labyrinthiformis 1 943 1 943

Manicina areolata 0 110 0 110

Eunicea flexuosa 519 579,912 519 579,912

Eunicea knighti 28 36,749 28 36,749

Eunicea palmeri 7 3,290 7 3,290

Eunicea succinea 16 17,309 16 17,309

Eunicea tayrona 1 1,530 1 1,530

Gorgonia ventalina 240 336,866 240 336,866

Leptoseris cucullata 1 3,432 1 3,432

Meandrina meandrites 2 540 2 540

Millepora alcicornis 54 135,326 54 135,326

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Table 3 ‐ Countourscarp Survey ‐ Coral Size Class and Surface Area

SIZE CLASS

Total Corals <15 cm dia or max.

dimension

Total Surface Area (cm2) corals <15 cm

Total Soft Corals <15 cm dia or max.

dimension

Total Stony Corals <15 cm dia or max.

dimension

Total Surface Area (cm2) Soft Corals

Total Surface Area (cm2) Stony Corals

Muricea muricata 42 30,164 42 30,164

Oculina diffusa 1 270 1 270

Orbicella faveolata 8 8,701 8 8,701

Palythoa caribaeorum 78 512,779 78 512,779

Plexaurella grisea 41 47,103 41 47,103

Plexaurella nutans 48 121,791 48 121,791

Porites astreoides 20 15,898 20 15,898

Porites porites 1 770 1 770

Pseudodiploria clivosa 2,029 563,684 2,029 563,684

Pseudodiploria strigosa 128 183,675 128 183,675

Pseudoplexaura cruscis 77 93,235 77 93,235

Pseudoplexaura porosa 1 748 1 748

Pseudoplexaura wagenaari 1 1,904 1 1,904

Pterogorgia anceps 4 2,463 4 2,463

Siderastrea radians 4 2,230 4 2,230

Siderastrea sidera 0 0 0 0

Solenastrea bournoni 1 2,184 1 2,184

TOTAL BY CLASS SIZE 3,536 2,993,052 1,276 2,260 2,065,882 927,170

Finally, Table 4 reflects the species present and number of occurrences for each transect.

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Table 4 – Counterscarp Survey - Coral Species and Number of Occurrences by Transect

A n ti llo go rg ia a m er ic an a

A n ti llo go rg ia r ig id a

C o lp o p h yl lia n at an s

D ic h o co en ia s to ke si i

D ip lo ri a la b yr in th if o rm is

Eu n ic ea f le xu o sa ic ea k n ig h ti ic ea p al m er i

Eu n ic ea s u cc in ea ic ea t ay ro n a

G o rg o n ia v en ta lin a

Le p to se ri s cu cu lla ta

M an ic in a ar eo la ea n d ri n a m ea n d ri te s

M ill e p o ra a lc ic o rn u ri ce a m u ri ca

O cu lin a d if fu

O rb ic el la f av eo la

P al yt h o a ca ri b ae o ru m le xa u re lla g ri se a

P le xa u re lla n u ta n s

P o ri te s as tr eo id es ri te s p o ri te s

P se u d o d ip lo ri a cl iv se u d o d ip lo ri a st ri go u d o p le xa u ra c ru sc u d o p le xa u ra p o ro u d o p le xa u ra w ag en aa ri te ro go rg ia a n ce p s

Si d er as tr ea r ad ia n s

Si d er as tr ea s id er a

So le n as tr ea b o u rn o n i

To ta l P er T ra ns ec t

0+00 to 1+00

1 1 3 5

1+00 to 2+00

3 2 5 2 4 16

2+00 to 3+00

8 4 8 1 21 1 43

3+00 to 4+00

1 10 2 2 9 11 2 14 2 28 6 1 1 89

4+00 to 5+00

2 19 1 4 2 2 10 5 29 8 1 83

5+00 to 6+00

1 1 3 1 2 11 4 1 14 1 4 21 64

6+00 to 7+00

3 6 1 4 8 1 1 2 13 2 20 61

7+00 to 8+00

6 18 15 1 2 1 8 2 2 38 2 1 1 97

8+00 to 9+00

1 40 2 7 28 4 1 1 7 1 2 24 2 120

9+00 to 10+00

18 1 50 8 7 1 2 21 4 317 74 1 504

10+00 to 11+00

12 4 3 1 47 3 2 15 4 1 5 4 370 31 1 503

11+00 to 12+00

10 5 71 1 1 1 15 1 2 1 2 4 428 18 7 567

12+00 to 13+00

28 12 3 56 1 38 1 6 1 1 8 348 38 17 1 559

13+00 to 14+00

38 8 1 1 71 51 1 4 6 1 4 1 138 9 14 1 1 350

14+00 to 15+00

11 1 41 34 12 1 3 152 10 3 2 1 271

15+00 to 16+00

33 1 1 3 160 19 66 13 5 10 9 1 18 62 8 36 1 1 447

16+00 to 17+00

15 5 1 93 20 4 10 11 6 27 10 32 3 13 3 253

17+00 to 18+00

12 2 41 5 2 1 3 5 47 1 1 1 121

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Please refer to Appendix A for a complete list of species and locations along the counterscarp as well as Appendix B for representative photos.

Counterscarp Breaches:

Counterscarp Breach Area 1 Survey

Breach area 1 – At the area of breach 1 (station 7+00 through 7+50), 9 colonies were observed on the interior (moat side) of the breach. All colonies observed were soft corals with a maximum dimension of 25 cm.

Figure 5 - Counterscarp Breach 1 Survey - Coral Locations

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Table 5 - Counterscarp Breach 1 Survey - Coral Species Data

Table 5 – Counterscarp Breach 1 Survey - Coral Species Data Species Location* Depth NAVD** Length Width Height

Pterogorgia anceps (So) 07+09 4.3 5 7 13

Pterogorgia anceps (So) 07+11 3.3 2 8 17

Pterogorgia anceps (So) 07+13 3.3 2 9 18

Antillogorgia americana (So) 07+15 3.3 4 9 20

Antillogorgia rigida (So) 07+17 3.3 4 14 25

Pterogorgia anceps (So) 07+19 3.3 3 6 14

Pterogorgia anceps (So) 07+31 4.3 2 5 15

Pterogorgia anceps (So) 07+32 4.3 5 15 16

Pterogorgia anceps (So) 07+36 3.3 4 6 15

Stony Coral (St), Soft Coral (So) *Moat side of counterscarp, ** Depth in feet, all other dimensions in cm.

Counterscarp Breach Area 2 Survey

Breach area 2 – At the area of breach 2 (station 08+43 to 08+50), only the upper ±4’ of the counterscarp is missing with the footer still intact. On the waterward site of the counterscarp, 15 colonies observed were located on the intact section of the counterscarp footing. On the mote side, 3 colonies were observed within the breach. Both hard and soft corals were located within the area of the breach.

Figure 6 - Counterscarp Breach 2 Coral Locations

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Table 6 - Counterscarp Breach 2 Survey – Coral Species Data

Table 6 ‐ Counterscarp Breach 2 Survey – Coral Species Data

Species Location Depth NAVD** Length Width Height

Millepora alcicornis 08+43 4.6 38 48 19

Eunicea flexuosa 08+43 4.9 14 28 24

Eunicea succinea 08+44 4.6 36 25 44

Eunicea flexuosa 08+44 4.6 20 40 33

Pseudodiploria clivosa 08+45 4.6 37 35 8

Gorgonia ventalina 08+47 3.6 1 18 30

Pseudodiploria clivosa 08+47 3.7 40 18 6

Eunicea flexuosa 08+47 4.1 16 20 29

Gorgonia ventalina 08+48 2.6 1 23 34

Pseudodiploria clivosa 08+48 4.6 1 46 38

Pseudodiploria clivosa 08+48 3.6 25 21 6

Pseudodiploria clivosa 08+49 1.6 1 20 34

Gorgonia ventalina 08+50 3.5 82 20 8

Millepora alcicornis 08+50 4.1 1 33 33

Gorgonia ventalina 08+50 3.6 24 57 2

Inside Mote

Eunicea flexuosa 08+45 4.0 20 54 44

Pseudodiploria clivosa 08+50 3.0 15 10 5

Pseudodiploria clivosa 08+50 3.7 37 40 6

** Depth in feet, all other dimensions cm.

Moat Survey

The moat surrounding the Fort was found to be divided by two sand deposits on the northeastern and southwestern portions of the Fort. The northeastern deposit eliminates any tidal exchange at this location. The southwestern deposit allows partial tidal exchange, but it is severely limited (estimated 80% to 90% blockage). See figure 7 for sand deposit locations.

On November 17, 2019, a survey of area 1 (see figure 7 below) was conducted by two divers; GPS mapping was completed by Joshua Kohlbecker with the limits of SAV being identified by Benjamin Brice. GPS data was collected at the point where SAV were first observed and where coverage ceased. Notes on species composition and density were recorded along with representative photos. See Appendix C for representative photos within the moat.

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Moat Survey Area 1

Four distinct polygons of seagrass were identified within Moat Survey Area 1 (see figure 8). In Polygon 1, seagrass coverage – consisting of Halodule wrightii and Thalassia testudinum - was observed within 2 feet to 3 feet of the sand deposit. Densities varied from an estimated 80% to 90% to less than 10% coverage.

In Polygon 2, the species composition shifted to a community dominated by Syringodium filiforme with Halodule wrightii and Thalassia testudinum intermixed at a lower density. Seagrass density within this portion was as high with an estimated 95% coverage. This coverage and species density continued until the pedestrian bridge where there was a break in seagrass coverage.

Figure 7 - Moat Survey Areas

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West of the pedestrian bridge, in Polygons 3 and 4, seagrass coverage consisted of Thalassia testudinum and Halodule wrightii. Coverage within the area varied from 5% to 40%. Intermixed within the seagrass were specimens of Udotea fabellum, Penicullus capitatus, and Halimeda discoidea. Throughout Moat Survey Area 1, other species observed included a large population of Cassiopea sp. and Lutjanus griseus.

Moat Survey Area 2

Moat Survey Area 2, comprised of 9 Polygons, was surveyed on November 18, 2019 (see figure 8). Polygon 1, which starts at the northeastern side of Area 2, had seagrass composition of Thalassia testudinum, Syringodium filiforme, and Halodule wrightii. Combined, the threes species had an estimated coverage of 15% to 20%. The intermixed with the seagrasses within polygon 1 was Udotea flabellum and Gracilaria sp.

Seagrass composition of Polygon 2 consisted of Thalassia testudinum as the only species observed, along with the algae Halimeda discoidea and Penicullus capitatus. The estimated coverage of Thalassia testudinum ranged from 15% to 20%.

Polygon 3 seagrass composition was limited to Thalassia testudinum. Estimated coverage of Thalassia ranged from 5% to 10% to a maximum of 25%. Low epiphyte coverage was observed on the seagrass within this area. The majority of coverage within Polygon 3 consisted of the algae, Halimeda discoidea.

Polygon 4 seagrass composition was dominated by Thalassia testudinum and Syringodium filiforme. Estimated coverage was 30% to40% with little to no epiphyte coverage.

Polygon 5 seagrass composition consisted of Thalassia testudinum, Syringodium filiforme, and Halodule wrightii. Estimated coverage ranged as high as 30% to 40% and down to 5% at the edges of polygon. Heavy epiphyte coverage on the Syringodium was observed on the interior portions of the polygon.

Polygon 6 seagrass composition was Thalassia testudinum with scattered amounts of the algae, Halimeda discoidea. Coverage was estimated at 5% to10% throughout this polygon.

Polygon 7 seagrass composition consisted of Thalassia testudinum with scattered algae, Halimeda discoidea. Estimated coverage was between 20% and 30%. No epiphyte coverage was observed.

Polygon 8 seagrass composition was Syringodium filiforme and Thalassia testudinum.

Syringodium was the dominate species within this polygon with an estimated coverage 60% to 70%; Thalassia had a coverage of less than 10%.

Polygon 9 seagrass composition was Halodule wrightii and Thalassia testudinum. Halodule was the dominate species within this polygon with an estimated coverage of 60% to 70%; Thalassia had an estimated coverage of less than 5%.

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Within Area 1, 0.87 acres of SAV was mapped and within Area 2, 1.07 acres of SAV was mapped.

The total of SAV coverage within the moat was 1.94 acres.

Table 7 - Moat SAV Coverage and Species

Table 7 – Moat SAV Coverage and Species

Max Coverage Acreage Species

Area 1

Polygon 1 80‐90% 0.35 Hw, Tt

Polygon 2 95% 0.28 Sf, Hw, Tt

Polygon 3 40% 0.14 Tt, Hw, Uf, Pc, Hd

Polygon 4 40% 0.09 Tt, Hw, Uf, Pc, Hd

Area 1 Total 0.87

Area 2

Polygon 1 20% 0.17 Tt, Sf, Hw, Uf G

Polygon 2 20% 0.02 Tt, Hd, Pc, Polygon 3 25% 0.45 Tt, Hd

Polygon 4 40% 0.06 Tt, Sf

Polygon 5 40% 0.08 Tt, Sf, Hw, Polygon 6 10% 0.03 Tt, Hd

Polygon 7 30% 0.08 Tt, Hd

Polygon 8 70% 0.02 Sf, Tt

Polygon 9 70% 0.16 Hw, Tt

Area 2 Total 1.07

Total Moat SAV 1.94

Seagrasses ‐ Halodule wrightii (Hw), Thalassia testudinum (Tt), Syringodium filiforme (Sf), Marco Algae‐ Halimeda discoidea (Hd), Penicullus capitatus (Pc), Udotea fabellum (Uf), Gracilaria sp (Gs)

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Figure 8 - Moat Seagrass Polygons

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Pedestrian Bridge Footings Survey

As part of the structure survey within the moat, the counterscarp wall in the immediate vicinity of the pedestrian bridge and pedestrian bridge footings were surveyed.

Figure 9 - Pedestrian Bridge Footings

Along the counterscarp wall, a buffer of 30 feet was surveyed around the pedestrian bridge. A total of 18 hard corals were observed within the buffer area. All 18 corals were Siderastrea radians. Details of the Counterscarp Pedestrian Bridge corals are presented in Table 8 - Counterscarp Pedestrian Bridge Survey Corals. For the purposes of the survey, a GPS point was established for 0+00 and station numbering progressed from the right of the pedestrian bridge to the left. Each coral observed, along with the length, width and height, was recorded in centimeters.

Table 8 - Counterscarp Pedestrian Bridge Survey Corals

Table 8 – Counterscarp Pedestrian Bridge Survey Corals

Species Location Length Width Height

Siderastrea radians 0+03.0 11 7 11

Siderastrea radians 0+03.7 19 16 15

Siderastrea radians 0+05.8 20 18 15

Siderastrea radians 0+06.7 30 25 22

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Table 8 – Counterscarp Pedestrian Bridge Survey Corals

Species Location Length Width Height

Siderastrea radians 0+08.6 20 20 27

Siderastrea radians 0+09.6 8 9 7

Siderastrea radians 0+12.4 29 30 22

Siderastrea radians 0+14.7 62 23 22

Siderastrea radians 0+19.4 36 25 20

Siderastrea radians 0+20.8 10 8 7

Siderastrea radians 0+22.4 27 12 10

Siderastrea radians 0+23.0 8 11 7

Siderastrea radians 0+24.0 27 26 12

Siderastrea radians 0+24.6 27 11 11

Siderastrea radians 0+26.2 10 13 13

Siderastrea radians 0+26.4 11 11 11

Siderastrea radians 0+28.1 10 11 5

Siderastrea radians 0+30.0 29 14 9

* All dimensions in centimeters

The four footings of the pedestrian bridge were surveyed from the MHWL to the substrate, on all four surfaces. For the purposes of the survey, the footings were numbered 1 to 4, starting at the counterscarp and progressing to the fort. Each side of the footings was designated using the dominate cardinal direction (B1N, B1E, B1W, B1S, B2N, ect) as shown in figure 10.

Figure 10 - Typical Pedestrian Bridge Footing Face Identifiers

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A total of 2 coral colonies were observed on the 4 footings. A single colony of Siderastrea radians was identified on the south face of Footing 1 (B1S) located 80 inches down from the top of the footing and 28 inches in from the left. Please see figure 11.

Figure 11 - Pedestrian Bridge Footings Survey Coral Locations

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The Siderastrea radians colony was identified on the south face of footing 4 (B4S). The location of the colony was at 65 inches down from the top of the footing and 18 inches in from the right side of the footing.

Table 9 - Pedestrian Bridge Corals

Table 9 – Pedestrian Bridge Survey Corals

Species Location Length Width Height

Siderastrea radians B1S 12 11 2

Siderastrea radians B4S 10 10 4

* All dimensions in centimeters

Seagrass Ground Truthing

The seagrass limits surrounding the fort was analyzed via the image classification tool in ArcGIS

10.3. A supervised classification was used to identify areas of known seagrass and bare ground coverage. For ground truthing purposes, 7 transects were surveyed to identify the presence or absence of SAV, estimated density, and dominate species present. Figure 12 shows the results of the initial image classification. The initial classification results indicated 2.52 acres of desnse SAV and 3.60 acres of sparse SAV.

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Figure 12 - Classified Image

Figure 13 shows the revised image classification with the ground truthing transects overlaid on the classification. Visually, there is good agreement between the image classification and the ground truthing transects. Based on ground truthing, the main area of revision to the image classification was to remove the classification of shadow cast by the counterscarp (classified as dense or sparse SAV). These revisions changed the quanities of SAV mapped. The dense SAV was reduced by

0.13 acres and the mapped sparse SAV was reduced by 0.42 acres. During the ground truthing, Thalassia testudinum was the dominate species observed along with some minor intermixing of Halodule wrightii.

Table 10 - Seagrass Ground Truthing Acreages

Table 10 ‐ Seagrass Ground Truthing

Dense SAV Mapped 2.39 ac.

Sparse SAV Mapped 3.18 ac.

Total SAV Mapped Within Survey Area 5.57 ac.

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Figure 13 - Updated Image Classification and Ground Truthing Transects

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Appendix A Counterscarp Survey Coral Locations and Measurements

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Station Depth NAVD Length Width Height Sp Date

00+76.4 2.7 24 22 Porites Porites 11/14/2019

00+77.9 2.7 5 3 3 Porites Porites 11/14/2019

00+81.7 2.3 6 4 4 Porites Porites 11/14/2019

00+84.7 3.8 6 5 5 Oculina diffusa 11/14/2019

00+89.6 4.6 30 25 Eunicea flexuosa 11/14/2019

01+01.1 2.4 5 3 2 Porites Porites 11/14/2019

01+02.8 2.2 8 4 3 Porites Porites 11/14/2019

01+02.8 3.3 10 10 Muricea muricata 11/14/2019

01+04.8 1.9 8 7 1 Pseudodiploria strigosa 11/14/2019

01+07.3 2.7 15 21 Eunicea flexuosa 11/14/2019

01+10.2 2.7 35 8 3 Pseudodiploria strigosa 11/14/2019

01+10.9 3.2 10 13 1 Millepora alcicornis 11/14/2019

01+23.5 2.5 13 9 1 Pseudodiploria strigosa 11/14/2019

01+35.3 3.6 12 10 Millepora alcicornis 11/14/2019

01+37.0 2.6 13 18 1 Pseudodiploria strigosa 11/14/2019

01+53.8 3.6 17 12 Muricea muricata 11/14/2019

01+55.6 4.1 23 17 Eunicea flexuosa 11/14/2019

01+56.3 2.9 21 16 Muricea muricata 11/14/2019

01+63.8 3.1 26 20 Muricea muricata 11/14/2019

01+81.9 3.5 18 18 Muricea muricata 11/14/2019

01+91.7 3.7 22 18 8 Eunicea flexuosa 11/14/2019

02+02.0 1.6 18 15 Muricea muricata 11/15/2019

02+07.8 1.7 18 15 19 Pseudodiploria clivosa 11/15/2019

02+12.6 1.9 50 36 11 Pseudodiploria clivosa 11/15/2019

02+18.9 1.6 53 42 30 Eunicea flexuosa 11/15/2019

02+24.6 1.7 46 30 17 Pseudodiploria clivosa 11/15/2019

02+26.2 1.7 61 41 14 Pseudodiploria clivosa 11/15/2019

02+31.2 1.9 81 32 30 Pseudodiploria clivosa 11/15/2019

02+32.5 1.9 14 17 Muricea muricata 11/15/2019

02+35.0 2.4 47 32 Eunicea flexuosa 11/15/2019

02+36.1 2.6 62 29 49 Pseudodiploria clivosa 11/15/2019

02+37.1 2.1 50 45 25 Pseudodiploria clivosa 11/15/2019

02+38.9 2.4 55 38 30 Pseudodiploria clivosa 11/15/2019

02+40.2 2.9 50 25 37 Pseudodiploria clivosa 11/15/2019

02+42.8 1.9 30 20 Muricea muricata 11/15/2019

02+42.8 1.9 30 28 Muricea muricata 11/15/2019

02+46.0 2.7 57 48 32 Eunicea flexuosa 11/15/2019

02+46.0 1.6 15 14 Muricea muricata 11/15/2019

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NAVD Length Width Height Sp Date

02+46.0 2.5 42 62 18 Eunicea flexuosa 11/15/2019

02+46.0 2.8 33 23 20 Eunicea flexuosa 11/15/2019

02+46.0 4.0 36 28 10 Pseudodiploria clivosa 11/15/2019

02+47.1 1.5 19 12 2 Pseudodiploria strigosa 11/15/2019

02+50.4 2.8 55 55 30 Pseudodiploria clivosa 11/15/2019

02+53.6 1.8 26 18 15 Muricea muricata 11/15/2019

02+58.8 2.4 210 44 40 Pseudodiploria clivosa 11/15/2019

02+59.7 2.4 40 33 Gorgonia ventalina 11/15/2019

02+61.3 4.0 60 28 8 Pseudodiploria clivosa 11/15/2019

02+71.9 4.4 40 30 22 Pseudodiploria clivosa 11/15/2019

02+73.9 3.4 35 28 38 Pseudodiploria clivosa 11/15/2019

02+75.1 3.1 30 28 32 Pseudodiploria clivosa 11/15/2019

02+78.8 2.2 68 46 13 Pseudodiploria clivosa 11/15/2019

02+83.0 1.8 274 63 Eunicea flexuosa 11/15/2019

02+84.1 3.0 28 22 Palythoa caribaeorum 11/15/2019

02+87.0 2.8 53 79 59 Eunicea flexuosa 11/15/2019

02+87.0 2.7 37 24 27 Pseudodiploria clivosa 11/15/2019

02+88.0 3.7 47 40 22 Pseudodiploria clivosa 11/15/2019

02+90.0 2.9 38 24 23 Pseudodiploria clivosa 11/15/2019

02+91.0 2.9 20 12 Muricea muricata 11/15/2019

02+93.0 4.4 25 26 Gorgonia ventalina 11/15/2019

02+94.0 4.5 25 17 Gorgonia ventalina 11/15/2019

02+96.2 2.7 43 28 20 Pseudodiploria clivosa 11/15/2019

02+96.2 3.7 20 14 Muricea muricata 11/15/2019

02+97.0 5.0 35 12 Eunicea flexuosa 11/15/2019

02+100.0 2.4 38 42 Gorgonia ventalina 11/15/2019

03+02.5 3.5 29 17 Muricea muricata 11/15/2019

03+02.5 4.5 47 32 12 Pseudodiploria clivosa 11/15/2019

03+03.0 1.5 17 14 Eunicea palmeri 11/15/2019

03+04.1 3.5 27 38 Gorgonia ventalina 11/15/2019

03+04.1 3.8 66 52 38 Pseudodiploria clivosa 11/15/2019

03+08.1 3.5 133 105 33 Pseudodiploria clivosa 11/15/2019

03+08.1 2.5 12 9 Eunicea palmeri 11/15/2019

03+09.9 2.5 13 18 Gorgonia ventalina 11/15/2019

03+11.0 2.5 457 33 Palythoa caribaeorum 11/15/2019

03+12.2 3.6 25 17 Muricea muricata 11/15/2019

03+12.2 3.7 49 36 Eunicea flexuosa 11/15/2019

03+14.7 3.2 34 25 15 Pseudodiploria clivosa 11/15/2019

03+15.0 1.5 42 22 25 Eunicea flexuosa 11/15/2019

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NAVD Length Width Height Sp Date

03+18.7 4.7 40 25 28 Pseudodiploria clivosa 11/15/2019

03+26.0 1.7 32 39 8 Pseudodiploria clivosa 11/15/2019

03+26.0 2.5 42 40 28 Pseudodiploria clivosa 11/15/2019

03+26.0 3.7 78 28 4 Solenas trea bournoni 11/15/2019

03+27.1 1.7 52 58 48 Pseudodiploria strigosa 11/15/2019

03+27.1 4.8 50 16 Antillogorgia rigida 11/15/2019

03+28.0 3.0 48 38 22 Pseudodiploria clivosa 11/15/2019

03+29.0 2.1 57 25 Gorgonia ventalina 11/15/2019

03+29.0 2.9 46 30 30 Pseudodiploria clivosa 11/15/2019

03+29.0 2.9 35 60 Muricea muricata 11/15/2019

03+29.0 3.5 35 30 14 Muricea muricata 11/15/2019

03+31.0 1.4 105 50 Palythoa caribaeorum 11/15/2019

03+34.2 1.6 32 59 Pseudodiploria clivosa 11/15/2019

03+34.2 3.4 66 56 Eunicea knighti 11/15/2019

03+37.0 1.6 23 23 Pseudodiploria strigosa 11/15/2019

03+37.0 2.2 37 20 25 Pseudodiploria clivosa 11/15/2019

03+39.2 1.4 34 30 12 Pseudodiploria clivosa 11/15/2019

03+39.2 1.4 16 12 5 Pseudodiploria strigosa 11/15/2019

03+41.6 1.8 61 38 17 Pseudodiploria clivosa 11/15/2019

03+41.6 3.4 51 32 Gorgonia ventalina 11/15/2019

03+41.6 3.4 52 38 15 Eunicea flexuosa 11/15/2019

03+41.6 3.6 46 43 20 Pseudodiploria clivosa 11/15/2019

03+44.7 2.4 42 42 22 Pseudodiploria clivosa 11/15/2019

03+46.2 2.9 46 48 17 Pseudodiploria clivosa 11/15/2019

03+47.6 3.4 32 38 8 Pseudodiploria clivosa 11/15/2019

03+49.3 1.4 30 37 13 Pseudodiploria clivosa 11/15/2019

03+49.3 1.6 63 35 33 Eunicea flexuosa 11/15/2019

03+49.3 2.4 46 28 Gorgonia ventalina 11/15/2019

03+49.3 3.6 64 56 19 Pseudodiploria clivosa 11/15/2019

03+52.1 1.4 106 32 Palythoa caribaeorum 11/15/2019

03+52.1 2.4 92 42 20 Palythoa caribaeorum 11/15/2019

03+52.1 3.4 33 27 7 Pseudodiploria strigosa 11/15/2019

03+55.1 1.4 38 15 Eunicea flexuosa 11/15/2019

03+55.1 2.6 25 18 Eunicea flexuosa 11/15/2019

03+55.1 2.9 33 43 16 Pseudodiploria clivosa 11/15/2019

03+59.9 1.3 180 52 Palythoa caribaeorum 11/15/2019

03+62.4 3.2 30 15 Muricea muricata 11/15/2019

03+64.3 3.2 50 20 Eunicea flexuosa 11/15/2019

03+64.7 3.2 18 9 Muricea muricata 11/15/2019

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NAVD Length Width Height Sp Date

03+66.3 1.5 156 47 Palythoa caribaeorum 11/15/2019

03+66.3 2.0 12 8 5 Porites Porites 11/15/2019

03+66.3 4.0 16 9 Eunicea knighti 11/15/2019

03+68.1 3.1 22 9 Muricea muricata 11/15/2019

03+70 3.0 10 6 6 Porites Porites 11/15/2019

03+70 5.2 36 15 Gorgonia ventalina 11/15/2019

03+71 1.2 Pseudodiploria clivosa 11/15/2019

03+73 2.7 44 43 30 Pseudodiploria clivosa 11/15/2019

03+76 2.0 22 18 Palythoa caribaeorum 11/15/2019

03+76 3.3 101 62 35 Pseudodiploria clivosa 11/15/2019

03+77.3 2.5 42 14 23 Palythoa caribaeorum 11/15/2019

03+77.3 3.0 33 30 13 Palythoa caribaeorum 11/15/2019

03+77.3 3.3 60 54 Gorgonia ventalina 11/15/2019

03+77.3 3.7 48 30 9 Pseudodiploria strigosa 11/15/2019

03+79.9 2.0 42 22 7 Pseudodiploria clivosa 11/15/2019

03+79.9 2.5 62 50 35 Palythoa caribaeorum 11/15/2019

03+82 2.5 141 72 38 Pseudodiploria clivosa 11/15/2019

03+82 2.7 40 20 Muricea muricata 11/15/2019

03+85 3.5 29 39 17 Pseudodiploria strigosa 11/15/2019

03+86 4.5 41 31 22 Eunicea flexuosa 11/15/2019

03+86 4.5 27 15 22 Muricea muricata 11/15/2019

03+86 4.5 33 23 Palythoa caribaeorum 11/15/2019

03+88 1.8 107 30 Palythoa caribaeorum 11/15/2019

03+88 3.0 111 64 44 Palythoa caribaeorum 11/15/2019

03+89 3.3 40 38 10 Pseudodiploria clivosa 11/15/2019

03+89 3.7 28 16 5 Palythoa caribaeorum 11/15/2019

03+91 2.7 107 98 40 Pseudodiploria clivosa 11/15/2019

03+92 3.5 68 28 28 Pseudoplexaura wagenaari 11/15/2019

03+93 2.8 47 47 50 Eunicea flexuosa 11/15/2019

03+93 3.1 94 74 40 Pseudodiploria clivosa 11/15/2019

03+93 4.3 50 12 Muricea muricata 11/15/2019

03+93 4.6 28 20 Muricea muricata 11/15/2019

03+96.9 2.8 37 14 Eunicea flexuosa 11/15/2019

03+96.9 2.9 11 11 Millepora alcicornis 11/15/2019

03.96.9 3.1 23 25 Millepora alcicornis 11/15/2019

03+96.9 3.1 40 28 Gorgonia ventalina 11/15/2019

03+97.1 2.3 42 48 Gorgonia ventalina 11/15/2019

04+03.1 3.7 160 50 Palythoa caribaeorum 11/15/2019

04+06 4.0 120 75 65 Palythoa caribaeorum 11/15/2019

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NAVD Length Width Height Sp Date

04+06 3.1 66 40 15 Pseudodiploria clivosa 11/15/2019

04+06 2.6 59 36 Gorgonia ventalina 11/15/2019

04+09 3.1 61 43 23 Eunicea flexuosa 11/15/2019

04+09 3.1 11 11 6 Porites astreoides 11/15/2019

04+09 4.1 40 25 Eunicea flexuosa 11/15/2019

04+09 6.3 55 40 Antillogorgia rigida 11/15/2019

04+13 3.1 20 21 4 Pseudodiploria strigosa 11/15/2019

04+13 5.1 53 26 Eunicea knighti 11/15/2019

04+13 5.1 49 58 Eunicea flexuosa 11/15/2019

04+13 5.1 45 20 Eunicea flexuosa 11/15/2019

04+15 4.1 41 34 20 Eunicea flexuosa 11/15/2019

04+15 4.1 44 34 20 Pseudodiploria clivosa 11/15/2019

04+18 4.1 62 47 37 Pseudodiploria clivosa 11/15/2019

04+18 4.1 40 31 Eunicea flexuosa 11/15/2019

04+21 4.1 41 36 20 Pseudodiploria strigosa 11/15/2019

04+21 4.1 43 45 24 Pseudodiploria clivosa 11/15/2019

04+21 4.1 11 7 5 Porites astreoides 11/15/2019

04+21 4.1 21 10 14 Pseudodiploria clivosa 11/15/2019

04+21 4.1 30 16 Muricea muricata 11/15/2019

04+25 3.1 7 7 4 Porites astreoides 11/15/2019

04+25 3.1 7 6 Porites astreoides 11/15/2019

04+25 3.1 8 6 4 Porites astreoides 11/15/2019

04+25 4.1 30 42 23 Pseudodiploria clivosa 11/15/2019

04+25 5.1 18 18 1 Gorgonia ventalina 11/15/2019

04+25 5.1 25 15 23 Eunicea flexuosa 11/15/2019

04+31 3.1 29 22 3 Palythoa caribaeorum 11/15/2019

04+31 5.1 52 24 23 Antillogorgia rigida 11/15/2019

04+36 3.2 35 25 15 Pseudodiploria strigosa 11/15/2019

04+39 3.2 54 34 10 Eunicea flexuosa 11/15/2019

04+39 4.2 33 25 Pseudodiploria clivosa 11/15/2019

04+40 4.2 53 60 13 Eunicea flexuosa 11/15/2019

04+43 4.2 24 24 15 Pseudodiploria clivosa 11/15/2019

04+43 5.2 59 38 15 Pseudodiploria clivosa 11/15/2019

04+46 3.2 27 16 Muricea muricata 11/15/2019

04+46 2.9 22 5 Millepora alcicornis 11/15/2019

04+52 3.2 54 28 10 Pseudodiploria clivosa 11/15/2019

04+52 3.2 84 30 33 Palythoa caribaeorum 11/15/2019

04+52 3.2 29 40 Gorgonia ventalina 11/15/2019

04+54 2.7 49 26 17 Eunicea flexuosa 11/15/2019

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NAVD Length Width Height Sp Date

04+54 3.2 45 32 17 Pseudodiploria clivosa 11/15/2019

04+54 4.2 44 22 19 Eunicea flexuosa 11/15/2019

04+54 4.2 40 27 25 Pseudodiploria clivosa 11/15/2019

04+54 4.2 64 28 20 Eunicea flexuosa 11/15/2019

04+56 4.2 37 21 19 Pseudodiploria clivosa 11/15/2019

04+57 3.2 68 28 9 Pseudodiploria clivosa 11/15/2019

04+57 4.2 37 19 21 Eunicea flexuosa 11/15/2019

04+57 4.2 31 31 11 Eunicea flexuosa 11/15/2019

04+57 4.2 28 30 19 Eunicea flexuosa 11/15/2019

04+57 4.2 11 24 18 Pseudodiploria strigosa 11/15/2019

04+57 4.2 18 14 12 Pseudodiploria clivosa 11/15/2019

04+59 2.7 52 34 6 Eunicea flexuosa 11/15/2019

04+59 3.7 125 69 Palythoa caribaeorum 11/15/2019

04+59 3.7 30 30 10 Pseudodiploria clivosa 11/15/2019

04+59 3.7 29 31 9 Pseudodiploria strigosa 11/15/2019

04+61 2.9 70 60 40 Pseudodiploria strigosa 11/15/2019

04+65 3.2 29 20 18 Pseudodiploria clivosa 11/15/2019

04+65 3.6 49 30 18 Pseudodiploria strigosa 11/15/2019

04+65 3.4 25 20 6 Pseudodiploria clivosa 11/15/2019

04+66 3.2 23 17 2 Pseudodiploria clivosa 11/15/2019

04+69 2.7 214 54 Palythoa caribaeorum 11/15/2019

04+69 3.2 147 63 Palythoa caribaeorum 11/15/2019

04+76 2.7 36 30 12 Pseudodiploria strigosa 11/15/2019

04+76 2.7 33 45 9 Pseudodiploria clivosa 11/15/2019

04+76 3.2 57 47 17 Pseudodiploria clivosa 11/15/2019

04+76 5.2 50 26 32 Eunicea flexuosa 11/15/2019

04+76 5.2 40 24 14 Eunicea flexuosa 11/15/2019

04+77 3.2 90 70 20 Pseudodiploria clivosa 11/15/2019

04+82 2.7 90 20 4 Pseudodiploria clivosa 11/15/2019

04+82 3.4 80 60 37 Palythoa caribaeorum 11/15/2019

04+84 2.5 78 63 40 Pseudodiploria clivosa 11/15/2019

04+86 3.2 60 70 45 Pseudodiploria clivosa 11/15/2019

04+87 3.2 37 23 42 Pseudodiploria clivosa 11/15/2019

04+88 3.2 42 62 42 Pseudodiploria clivosa 11/15/2019

04+91 3.2 38 37 Gorgonia ventalina 11/15/2019

04+93 4.2 24 13 Pseudodiploria clivosa 11/15/2019

04+95 3.6 50 35 10 Eunicea flexuosa 11/15/2019

04+95 5.2 24 14 Pseudodiploria clivosa 11/15/2019

04+95 3.6 19 10 Pterogorgia anceps 11/15/2019

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NAVD Length Width Height Sp Date

04+96 2.7 147 20 6 Palythoa caribaeorum 11/15/2019

04+96 3.2 36 8 Millepora alcicornis 11/15/2019

04+96 2.7 332 30 Palythoa caribaeorum 11/15/2019

05+00 2.7 69 66 44 Pseudodiploria clivosa 7/16/2020

05+00 4.1 18 18 41 Antillogorgia rigida 7/16/2020

05+00 4.4 16 6 40 Eunicea knighti 7/16/2020

05+02 3.2 83 37 40 Palythoa caribaeorum 7/16/2020

05+02 2.8 19 19 5 Porites astreoides 7/16/2020

05+06 3.3 42 42 20 Pseudodiploria clivosa 7/16/2020

05+06 4.0 8 4 44 Antillogorgia americana 7/16/2020

05+07 2.1 31 28 4 Pseudodiploria clivosa 7/16/2020

05+09 1.9 46 6 5 Pseudodiploria clivosa 7/16/2020

05+09 2.6 40 44 5 Palythoa caribaeorum 7/16/2020

05+11 2.0 30 9 2 Pseudodiploria clivosa 7/16/2020

05+12 1.9 437 40 2 Palythoa caribaeorum 7/16/2020

05+23 3.0 47 30 15 Pseudodiploria clivosa 7/16/2020

05+23 3.3 12 13 4 Pseudodiploria clivosa 7/16/2020

05+27 2.8 18 69 38 Eunicea flexuosa 7/16/2020

05+27 3.3 30 30 18 Pseudodiploria clivosa 7/16/2020

05+27 3.5 9 10 1 Porites astreoides 7/16/2020

05+28 3.1 48 40 24 Pseudodiploria clivosa 7/16/2020

05+28 3.7 27 50 7 Pseudodiploria clivosa 7/16/2020

05+32 1.7 129 48 2 Palythoa caribaeorum 7/16/2020

05+32 2.6 18 12 5 Pseudodiploria clivosa 7/16/2020

05+32 4.0 1 10 20 Eunicea palmeri 7/16/2020

05+32 4.5 1 17 31 Gorgonia ventalina 7/16/2020

05+35 3.3 27 16 7 Pseudodiploria clivosa 7/16/2020

05+35 4.2 56 13 7 Pseudodiploria clivosa 7/16/2020

05+35 4.4 42 16 5 Pseudodiploria clivosa 7/16/2020

05+35 3.8 13 14 3 Porites astreoides 7/16/2020

05+35 2.6 169 21 5 Millepora alcicornis 7/16/2020

05+37 2.3 70 27 10 Palythoa caribaeorum 7/16/2020

05+37 3.0 25 26 12 Palythoa caribaeorum 7/16/2020

05+39 2.3 58 30 20 Pseudodiploria clivosa 7/16/2020

05+46 1.8 9 29 38 Eunicea palmeri 7/16/2020

05+46 2.5 21 26 33 Plexaurella grisea 7/16/2020

05+46 3.6 1 16 9 Gorgonia ventalina 7/16/2020

05+49 2.3 1 40 55 Gorgonia ventalina 7/16/2020

05+49 2.8 20 48 39 Eunicea flexuosa 7/16/2020

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NAVD Length Width Height Sp Date

05+49 3.0 77 35 2 Palythoa caribaeorum 7/16/2020

05+53 3.0 62 32 1 Orbicella cavernosa 7/16/2020

05+56 2.6 69 22 2 Pseudodiploria clivosa 7/16/2020

05+56 3.6 8 14 3 Porites astreoides 7/16/2020

05+60 2.5 144 30 17 Palythoa caribaeorum 7/16/2020

05+60 2.9 23 8 4 Pseudodiploria clivosa 7/16/2020

05+60 3.3 1 23 36 Gorgonia ventalina 7/16/2020

05+60 3.6 1 28 44 Gorgonia ventalina 7/16/2020

05+60 3.9 11 20 27 Eunicea flexuosa 7/16/2020

05+64 2.1 63 28 8 Gorgonia ventalina 7/16/2020

05+64 2.6 26 19 8 Millepora alcicornis 7/16/2020

05+64 2.9 1 11 28 Gorgonia ventalina 7/16/2020

05+66 1.9 40 10 1 Millepora alcicornis 7/16/2020

05+69 1.9 1 38 36 Gorgonia ventalina 7/16/2020

05+72 1.9 1 58 40 Gorgonia ventalina 7/16/2020

05+72 2.4 131 54 30 Palythoa caribaeorum 7/16/2020

05+76 2.4 134 23 9 Palythoa caribaeorum 7/16/2020

05+76 2.5 1 14 30 Gorgonia ventalina 7/16/2020

05+85 3.5 32 15 2 Pseudodiploria clivosa 7/16/2020

05+85 3.5 41 31 5 Pseudodiploria clivosa 7/16/2020

05+89 1.9 113 33 1 Palythoa caribaeorum 7/16/2020

05+89 2.1 10 13 3 Pseudodiploria clivosa 7/16/2020

05+89 2.5 60 20 6 Palythoa caribaeorum 7/16/2020

05+89 2.7 14 10 1 Pseudodiploria clivosa 7/16/2020

05+93 1.9 103 33 3 Palythoa caribaeorum 7/16/2020

05+93 3.7 1 25 31 Gorgonia ventalina 7/16/2020

05+99 2.1 27 10 4 Millepora alcicornis 7/16/2020

05+99 2.7 70 24 4 Palythoa caribaeorum 7/16/2020

06+00 1.5 122 37 1 Palythoa caribaeorum 7/16/2020

06+02 3.2 7 42 3 Pseudodiploria clivosa 7/16/2020

06+03 3.2 39 25 24 Pseudodiploria clivosa 7/16/2020

06+05 2.7 19 16 2 Pseudodiploria clivosa 7/16/2020

06+10 2.7 1 23 27 Gorgonia ventalina 7/16/2020

06+13 2.5 90 57 26 Pseudodiploria clivosa 7/16/2020

06+16 1.3 213 50 2 Palythoa caribaeorum 7/16/2020

06+25 2.6 25 32 8 Pseudodiploria clivosa 7/16/2020

06+25 2.6 1 23 29 Gorgonia ventalina 7/16/2020

06+26 1.8 66 32 11 Pseudodiploria clivosa 7/16/2020

06+26 1.1 13 12 5 Pseudodiploria clivosa 7/16/2020

Fort Jefferson- Coral and Seagrass Survey DRTO 244370

Page 36 of 177 October 5, 2020

NAVD Length Width Height Sp Date

06+28 2.6 15 38 26 Muricea muricata 7/16/2020

06+29 3.0 24 14 2 Palythoa caribaeorum 7/16/2020

06+31 3.2 30 46 43 Eunicea knighti 7/16/2020

06+32 3.2 183 73 34 Palythoa caribaeorum 7/16/2020

06+38 1.4 1 20 26 Gorgonia ventalina 7/16/2020

06+38 2.3 6 20 26 Eunicea flexuosa 7/16/2020

06+40 2.7 49 58 67 Muricea muricata 7/16/2020

06+40 2.7 19 19 37 Eunicea palmeri 7/16/2020

06+40 3.8 35 36 17 Pseudodiploria clivosa 7/16/2020

06+42 1.9 98 37 26 Millepora alcicornis 7/16/2020

06+44 3.6 19 19 33 Eunicea succinea 7/16/2020

06+44 3.6 19 18 23 Plexaurella grisea 7/16/2020

06+44 3.6 1 25 26 Gorgonia ventalina 7/16/2020

06+45 2.5 132 26 2 Leptoseris cucullata 7/16/2020

06+46 1.6 366 43 3 Palythoa caribaeorum 7/16/2020

06+46 1.7 25 30 37 Eunicea knighti 7/16/2020

06+49 3.1 152 68 29 Palythoa caribaeorum 7/16/2020

06+50 3.3 28 40 46 Eunicea flexuosa 7/16/2020

06+54 2.6 1 64 78 Gorgonia ventalina 7/16/2020

06+54 2.8 122 37 41 Palythoa caribaeorum 7/16/2020

06+58 1.4 1 14 10 Gorgonia ventalina 7/16/2020

06+58 1.7 11 35 48 Plexaurella grisea 7/16/2020

06+59 3.6 15 12 4 Pseudodiploria clivosa 7/16/2020

06+60 2.7 1 33 37 Gorgonia ventalina 7/16/2020

06+60 3.7 1 27 30 Gorgonia ventalina 7/16/2020

06+62 1.5 9 5 5 Eunicea succinea 7/16/2020

06+63 2.7 73 43 40 Pseudodiploria clivosa 7/16/2020

06+63 3.8 45 47 17 Pseudodiploria clivosa 7/16/2020

06+66 1.8 16 28 29 Eunicea succinea 7/16/2020

06+66 3.4 61 63 38 Palythoa caribaeorum 7/16/2020

06+69 2.6 19 30 10 Pseudodiploria clivosa 7/16/2020

06+69 3.6 50 30 25 Pseudodiploria clivosa 7/16/2020

06+69 3.0 20 20 10 Palythoa caribaeorum 7/16/2020

06+70 2.7 122 40 25 Palythoa caribaeorum 7/16/2020

06+75 3.0 30 35 38 Pseudodiploria clivosa 7/16/2020

06+75 4.8 13 15 10 Palythoa caribaeorum 7/16/2020

06+77 1.8 16 27 30 Eunicea succinea 7/16/2020

06+79 3.0 122 49 36 Palythoa caribaeorum 7/16/2020

06+79 4.1 19 24 25 Eunicea knighti 7/16/2020

Fort Jefferson- Coral and Seagrass Survey DRTO 244370

Page 37 of 177 October 5, 2020

NAVD Length Width Height Sp Date

06+82 2.2 19 35 49 Eunicea flexuosa 7/16/2020

06+83 2.2 106 45 19 Pseudodiploria clivosa 7/16/2020

06+83 3.3 19 45 40 Eunicea knighti 7/16/2020

06+83 2.9 11 54 40 Eunicea knighti 7/16/2020

06+83 4.3 38 33 7 Pseudodiploria clivosa 7/16/2020

06+85 2.4 56 28 20 Pseudodiploria clivosa 7/16/2020

06+85 3.4 112 50 48 Pseudodiploria clivosa 7/16/2020

06+86 1.6 70 41 1 Palythoa caribaeorum 7/16/2020

06+94 3.1 100 70 35 Pseudodiploria clivosa 7/16/2020

06+96 4.1 20 40 35 Eunicea knighti 7/16/2020

06+99 2.2 70 65 40 Pseudodiploria clivosa 7/16/2020

07+00 2.9 60 60 20 Pseudodiploria clivosa 7/16/2020

07+00 4.1 20 30 10 Pseudodiploria clivosa 7/16/2020

07+00 4.4 33 36 40 Eunicea knighti 7/16/2020

07+00 3.1 68 30 10 Pseudodiploria clivosa 7/16/2020

07+00 3.3 70 34 10 Palythoa caribaeorum 7/16/2020

07+34 6.0 1 19 26 Gorgonia ventalina 7/17/2020

07+35 6.0 1 23 24 Gorgonia ventalina 7/17/2020

07+35…