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Turtle Island Mitigation Banks in Vermilion Parish
NAME OF APPLICANT: Turtle Island Lake Mitigation, LLC; c/o Pangaea Conservation and Compliance, Attn: Leonard McCauley, P.O. Box 40345, Baton Rouge, LA 70835.
LOCATION OF WORK: The 1,384 acre site is located approximately 6.0 miles south of Forked Island, Louisiana, in Vermilion Parish, as shown on enclosed drawings (Latitude: 29.792113 N, Longitude:–92.313225 W). The Project is located within the Mermentau Basin, Hydrologic Unit 08080202.
CHARACTER OF WORK: Degrade interior levees, elevated roads, and rice dikes, while utilizing approximately 124,000 cubic yards of in situ earthen fill as part of the work to enhance and restore traditional surface hydrology to the site for the construction of a mitigation bank with mixed habitats consisting of coastal prairie, bottomland hardwoods and fresh marsh.
JOINT PUBLIC NOTICE
December 11, 2017
United States Army
Corps of Engineers
New Orleans District
Regulatory Branch
Post Office Box 60267
New Orleans, La. 70160-0267
State of Louisiana
Department of Environmental Quality
Post Office Box 4313
Baton Rouge, La. 70821-4313
Attn: Water Quality Certifications
(504) 862-2548/ FAX (504) 862-2574
Jacqueline.R.Farabee@usace.army.mil
Project Manager
Jacqueline Farabee
Permit Application Number
MVN-2017-00656-MR
(225) 219-3225 FAX (225) 325-8250
Elizabeth.Hill@la.gov
Project Manager
Elizabeth Hill
WQC Application Number
WQC # 171204-03
Interested parties are hereby notified that a permit application has been received by the New
Orleans District of the U.S. Army Corps of Engineers pursuant to: [ ] Section 10 of the Rivers
and Harbors Act of March 3, 1899 (30 Stat. 1151; 33 USC 403); and/or [ X ] Section 404 of the
Clean Water Act (86 Stat. 816; 33 USC 1344).
Application has also been made to the Louisiana Department of Environmental Quality, for a
Water Quality Certification (WQC) in accordance with statutory authority contained in Louisiana
Revised Statutes of 1950, Title 30, Chapter 11, Part IV, Section 2074 A(3) and provisions of
Section 401 of the Clean Water Act (P.L.95-17).
TURTLE ISLAND MITIGATION BANK IN VERMILION PARISH
NAME OF APPLICANT: Turtle Island Lake Mitigation, LLC; c/o Pangaea Conservation and
Compliance, Attn: Leonard McCauley, P.O. Box 40345, Baton Rouge, LA 70835.
LOCATION OF WORK: The 1,384 acre site is located approximately 6.0 miles south of Forked
Island, Louisiana, in Vermilion Parish, as shown on enclosed drawings (Latitude: 29.792113 N,
Longitude:92.313225 W). The Project is located within the Mermentau Basin, Hydrologic Unit
08080202.
CHARACTER OF WORK: Degrade interior levees, elevated roads, and rice dikes, while
utilizing approximately 124,000 cubic yards of in situ earthen fill as part of the work to enhance
and restore traditional surface hydrology to the site for the construction of a mitigation bank with
mixed habitats consisting of coastal prairie, bottomland hardwoods and fresh marsh.
The comment period for the Department of the Army Permit and the Louisiana Department of
Environmental Quality WQC will close 30 days from the date of this joint public notice. Written
comments, including suggestions for modifications or objections to the proposed work, stating
reasons thereof, are being solicited from anyone having interest in this permit and/or this WQC
request and must be mailed so as to be received before or by the last day of the comment
period. Letters concerning the Corps of Engineers permit application must reference the
applicant's name and the Permit Application Number, and be mailed to the Corps of Engineers
at the address above, ATTENTION: REGULATORY BRANCH. Similar letters concerning the
-2Water Quality Certification must reference the applicant's name and the WQC Application
number and be mailed to the Louisiana Department of Environmental Quality at the address
above.
The application for this proposed project is on file with the Louisiana Department of
Environmental Quality and may be examined during weekdays between 8:00 a.m. and 4:30 p.m.
Copies may be obtained upon payment of costs of reproduction.
Corps of Engineers Permit Criteria
The decision whether to issue a permit will be based on an evaluation of the probable
impacts, including cumulative impacts of the proposed activity on the public interest. That
decision will reflect the national concern for both protection and utilization of important
resources. The benefit which reasonably may be expected to accrue from the proposal must be
balanced against its reasonably foreseeable detriments. All factors which may be relevant to the
proposal will be considered including the cumulative effects thereof; among those are
conservation, economics, aesthetics, general environmental concerns, wetlands, historic
properties, fish and wildlife values, flood hazards, floodplain values, land use, navigation,
shoreline erosion and accretion, recreation, water supply and conservation, water quality, energy
needs, safety, food and fiber production, mineral needs, considerations of property ownership
and, in general, the needs and welfare of the people.
The U.S. Army Corps of Engineers is soliciting comments from the public, federal, state, and
local agencies and officials, Indian Tribes, and other interested parties in order to consider and
evaluate the impacts of this proposed activity. Any comments received will be considered by the
U.S. Army Corps of Engineers to determine whether to make, modify, condition, or deny a permit
for this proposal. To make this decision, comments are used to assess impacts on endangered
species, historic properties, water quality, general environmental effects, and other public
interest factors listed above. Comments are used in the preparation of an Environmental
Assessment and/or an Environmental Impact Statement pursuant to the National Environmental
Policy Act. Comments are also used to determine the need for a public hearing and to
determine the overall public interest of the proposed activity.
The New Orleans District is unaware of properties listed on the National Register of Historic
Places near the proposed work. The possibility exists that the proposed work may damage or
destroy presently unknown archeological, scientific, prehistorical, historical sites, or data.
Issuance of this public notice solicits input from the State Archeologist and State Historic
Preservation Officer regarding potential impacts to cultural resources. After receipt of comments
from this public notice the Corps will evaluate potential impacts and consult with the State
Historic Preservation Officer and Native American Tribes in accordance with Section 106 of the
national Historic Preservation Act, as appropriate.
Our initial finding is that the proposed work would neither affect any species listed as
endangered, nor affect any habitat designated as critical to the survival and recovery of any
endangered species listed by the U.S. Department of Commerce,
Utilizing Standard Local Operating Procedure for Endangered Species in Louisiana
(SLOPES), dated October 22, 2014, between the U.S. Army Corps of Engineers, New Orleans
and U.S. Fish and Wildlife Service, Ecological Services Office, the Corps has determined that
the proposed activity would have no effect on any species listed as endangered by the U.S.
Department of the Interior.
-3This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the
Magnuson-Stevens Fishery Conservation and Management Act. The applicant's proposal would
result in the destruction or alteration of 960.7 acre(s) of EFH utilized by various life stages of red
drum and penaeid shrimp. Our initial determination is that the proposed action would not have a
substantial adverse impact on EFH or federally managed fisheries in the Gulf of Mexico. Our
final determination relative to project impacts and the need for mitigation measures is subject to
review by and coordination with the National Marine Fisheries Service.
If the proposed work involves deposits of dredged or fill material into navigable waters, the
evaluation of the probable impacts will include the application of guidelines established by the
Administrator of the Environmental Protection Agency. Also, a certification that the proposed
activity will not violate applicable water quality standards will be required from the Department of
Environmental Quality, before a permit is issued.
Any person may request, in writing, within the comment period specified in this notice, that a
public hearing be held to consider this application. Requests for public hearings shall state, with
particularity, the reasons for holding a public hearing.
You are requested to communicate the information contained in this notice to any other
parties whom you deem likely to have interest in the matter.
The applicant has certified that the proposed activity described in the application complies
with and will be conducted in a manner that is consistent with the Louisiana Coastal Resources
Program. The Department of the Army permit will not be issued unless the applicant received
approval or a waiver of the Coastal Use Permit by the Department of Natural Resources.
You are requested to communicate the information contained in this notice to any other
parties whom you deem likely to have interested in the matter.
for
Martin S. Mayer
Chief, Regulatory Branch
Enclosure
FINAL PROSPECTUS FOR THE PROPOSED
TURTLE ISLAND MITIGATION BANK
MVN-2017-00656
Fresh Marsh, Coastal Prairie, and Bottomland Hardwood: Reestablishment,
Rehabilitation, Enhancement, and Preservation
Vermilion Parish, Louisiana
October 2017
Sponsored By:
Turtle Island Lake Mitigation, LLC
300 Rue Beauregard Suites A
Lafayette, La 70510
Table of Contents
1.0
INTRODUCTION ................................................................................................... 1
1.1 Site Location ........................................................................................................ 1
2.0
PROJECT GOALS AND OBJECTIVES ................................................................ 1
2.2 Watershed Contributions .......................................................................................... 4
3.0
ECOLOGICAL SUITABILITY OF THE SITE ...................................................... 5
3.1 Land Use ................................................................................................................. 5
3.2 Soils......................................................................................................................... 5
3.3 Hydrology ................................................................................................................ 6
3.4 Vegetation ................................................................................................................ 7
3.5 General Need for the Project in this Area ................................................................ 8
3.6 Technical Feasibility ................................................................................................ 9
4.0
ESTABLISHMENT OF THE MITIGATION BANK ............................................ 9
4.1 Site Restoration Plan ............................................................................................ 9
4.1.1
Hydrologic Restoration ................................................................................... 9
4.1.2
Vegetative Restoration ................................................................................... 10
4.2 Current Site Risks............................................................................................... 15
4.3 Long-Term Sustainability of the Site ................................................................. 15
5.0
PROPOSED SERVICE AREA.............................................................................. 15
6.0
OPERATION OF THE MITIGATION BANK ..................................................... 16
6.1 Project Representatives ...................................................................................... 16
6.2 Qualifications of the Sponsor ............................................................................. 16
6.3 Proposed Long-Term Ownership and Management Representatives ................ 16
6.4 Site Protection .................................................................................................... 16
6.5 Long-Term Strategy ........................................................................................... 17
7.0
REFERENCES ...................................................................................................... 17
Table of Contents
List of Tables
Table 1: Current Habitat Types and Landuse
Table 2: Proposed Mitigation Bank Habitat Types
Table 3: Proposed Botttomland Hardwood Species Assemblage to be Planted
Table 4: Proposed Potential Coastal Prairie Species to be Planted
Table 5: Proposed Potential Fresh Marsh Species to be established
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Site Vicinity Map
Site Boundary
Existing Conditions
Mitigation Types
Landuse
Soils
Existing Drainage
Proposed Drainage
Drainage Area
LIDAR Elevations (zoomed in views - Figures 10a-10d)
Cross-Section Locations (Cross-Sections - Figures 11a-11j)
Botttomland Hardwood Service Area
Coastal Prairie Service Area
Fresh Marsh Service Area
Attachments
Attachment A :
Jurisdictional determination MVN-2013-01087-SC
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
1.0
INTRODUCTION
Turtle Island Lake Mitigation, LLC (Sponsor) submits this Prospectus to the U.S.
Army Corps of Engineers - New Orleans District (CEMVN) and the Interagency Review
Team (IRT) and to the Louisiana Department of Natural Resources (LDNR) to initiate
evaluation of the proposed Turtle Island Mitigation Bank (TIMB) in accordance with
33 CFR 332.8(d)(2). The details pertaining to the use of this site as a mitigation bank
will be specified in the subsequent mitigation banking instrument (MBI). TIMB consists
of 1,384 acres currently used for agricultural purposes (Figures 1 and 2).
1.1
Site Location
The center point of the property is located at latitude 29.792113N and longitude
92.313225W (approximate center point) in Vermilion Parish, Louisiana. This location
includes all or portions of Sections 25 and 36, Township 14 South, and Range 1 East;
Sections 30 and 31, Township 14 South, and Range 2 East; and Section 6, Township 15
South and Range 2 East. The property is located in the Hydrologic Unit Code (HUC)
08080202 (Mermentau drainage basin).
Driving directions to the site are as follows:
The property is located approximately 6.0 miles south of Forked Island,
Louisiana. To reach the property from I-10, take exit 100 from I-10 onto N. Ambassador
Caffery Parkway (Louisiana Highway 3184). Follow Ambassador Caffery Parkway
south for 5.3 miles to U.S. Highway 167. Turn right onto U.S. Highway 167 and
continue for 14.8 miles. Turn right onto Veterans Memorial Drive (Louisiana Highway
14) and continue for 5.3 miles. Turn left on Louisiana Highway 695S and continue for
3.0 miles. Turn left on Louisiana Highway 335W and continue for 3.5 miles. Turn left
on Louisiana Highway 35S and continue for 15.3 miles. Turn left on to unpaved
agricultural road, which will dead end into the southern boundary of the property.
2.0
PROJECT GOALS AND OBJECTIVES
2.1
Aquatic Resource Type and Functions to be Restored/Enhanced/Preserved
This Bank will re-establish, rehabilitate, enhance, and preserve 112.9 acres of
bottomland hardwood forest (BLH), 287.7 acres of coastal prairie (CP), and 961.3 acres
of fresh marsh (FM).
1
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Table 1: Current Habitat Types and Landuse (see Figure 3)
Habitat Type
Landuse
Agricultural
Agricultural
Prior Converted Wetlands
Acreage
342.9
Herbaceous Wetlands
Agricultural
757.5
Forested Wetlands
Agricultural
48.7
Non-Wetlands
Agricultural
136.7
Non-Wetlands
Spoil Banks
70.4
Other U.S. Waters
Natural Drains / Drainage
Canals
27.8
Total
---
1,384.0
Table 2: Proposed Mitigation Bank Habitat Types (see Figure 4)
Habitat Type
Acreage
Coastal Prairie
Mitigation Type
287.7
Re-establishment
64.2
Re-establishment
48.7
Enhancement
204.0
Re-establishment
656.6
Rehabilitation
100.7
Preservation
Gapped Levee
13.9
Non-mitigation
Access Road
2.5
Non-mitigation
Other U.S. Waters
5.7
Non-mitigation
Bottomland Hardwood Forest
Fresh Marsh
Total
1,384.0
---
Total Mitigation and Inclusions
1,375.8
---
2
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
As defined by The Natural Communities of Louisiana published in 2009 by the Louisiana
Department of Wildlife and Fisheries (LDWF) and the Louisiana Natural Heritage program
(LNHP):
Bottomland Hardwood forests are forested, alluvial wetlands occupying broad floodplain
areas that flank large river systems. BLH forests may be called fluctuating water level
ecosystems characterized and maintained by a natural hydrologic regime of alternating wet and
dry periods. These forests support distinct assemblages of plants and animals associated with
particular landforms, soils, and hydrologic regimes. They are important natural communities for
maintenance of water quality, providing a very productive habitat for a variety of fish and
wildlife, and are important in regulation of flooding and stream recharge.
Coastal prairies, are prairies located within southwestern Louisiana, once very extensive
but today are limited to small, remnant parcels. Coastal prairies located along the southern
portion of the state may occur on "islands" or ridges surrounded by marsh. Soils are typically
saturated in winter and dry in late spring and fall. The region is underlain by a clay pan 6 to 18
inches below the surface that prevents downward percolation of water and inhibits upward
movement of capillary water. The diverse vegetation is most often dominated by grasses (with
an abundance of forbs); however, trees can be found within coastal prairies within higher
elevation (and better drained) areas near stream sides or along ridges, forming "gallery forests".
These trees act to divide the Coastal Prairie into many subunits or "coves". The natural
demarcation line between the forest and grassland is very sharp. Many plants in Coastal Prairie
are the same as ones found in the pine savannahs and flatwoods that occur immediately north of
the coastal prairie region. Fire plays a critical role in this natural community. Certain woody
species may invade without periodic fire. The transition zone from coastal prairie to pine
savannah is extremely diverse as it contains species from both communities.
Fresh marsh, are palustrine systems with emergent vegetation. The frequency and
duration of flooding in these areas are determined by their microtopography, which together are
the primary factors governing species distributions. These areas have the greatest plant diversity
and highest soil organic matter content of any marsh. The species composition of these areas
varies from site to site but is often dominated by Panicum hemitomon (maidencane).
Intermediate marsh, as described in "The Natural Communities of Louisiana," is an estuarine
system with intertidal emergent vegetation. It has an irregular tidal regime, is oligohaline, and is
dominated by narrow-leaved, persistent species. It is characterized by a diversity of species and
is often dominated by Spartina patens (wire grass). These two types of habitats are located
adjacent to each other with fresh marshes existing along the northern extent of the coastal
marshes, although they may occur beside coastal Bays where freshwater is entering the bay.
This project will re-establish, rehabilitate, and enhance fresh marsh, coastal prairie and
bottomland hardwood habitat wetland communities so that they become species rich/diverse,
sustainable wetland ecosystems. This shall be accomplished through removal of the site from
agricultural use; degrading of spoil banks and rice dikes, thereby restoring sheetflow across the
property; allowing overflowing of drainage features, thereby temporarily inundating the
property; and through vegetative plantings in order to restore a natural assemblage of species,
which will create additional wildlife habitat throughout.
3
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
2.2 Watershed Contributions
2.2.1
Watershed Need
The TIMB is proposed to provide compensatory mitigation for CEMVN approved projects
within the Mermentau watershed, which encompasses approximately 1,150 square miles. In
recent years, the watersheds to be serviced by the TIMB have seen the some of the highest
demand for wetland mitigation in the New Orleans District.
Due to development and agriculture, very little native prairie and forest habitat remains in
the vicinity of the site (see Figure 5), providing limited habitat for migratory birds and terrestrial
wildlife. The restoration of this site will provide 1,375.8 acres of much needed natural habitat.
The site will be converted to a more natural ecosystem, while also improving the water quality in
the receiving waters downstream of this site.
2.2.2
Watershed Benefits
The TIMB project area is located in the drainage area to Subsegment LA050702
(Intracoastal Waterway from Mermentau River to Vermilion Locks) as designated by Louisiana
Department of Environmental Quality (LDEQ). The project area flows to the south via a tributary
which drains to the Warren Canal (along southern boundary of the project). Warren Canal then
flows to the southeast and drains to Schooner Bayou Canal (approximately 4.6 miles downstream
of the project). Schooner Bayou Canal then flows to the east and drains to the Freshwater Bayou
Canal (approximately 8.6 miles downstream of the project). Freshwater Bayou Canal then flows
to the south and drains to the Gulf of Mexico (approximately 24 miles downstream of the project).
Although not identified as impaired in the current 2014 final LDEQ 303(d) list, the LDEQdesignated uses of Fish and Wildlife Propagation (FWP) and Primary Contact Recreation (PCR)
for Subsegment LA050702 were identified as impaired in the 2014 final LDEQ 303(d) list.
Identified impairments include chlorides, sulfates, temperature, and total dissolved solids (due to
natural sources), as well as fecal coliforms (due to septic systems and similar decentralized
systems). Due to its past water quality impairments, a Total Maximum Daily Load (TMDL) for
total suspended solids was completed for Subsegment LA050702 (Intracoastal Waterway) in
January 2001. Additional TMDLs for pesticides (carbofuran) and for dissolved oxygen and
nutrients (ammonia and total phosphorus) were completed for Subsegment LA050702 in
September 2001 and October 2001, respectively.
The cessation of agricultural activities along with degrading spoil banks and rice dikes, and
restoration of native habitats for this project will aid in meeting the current and future TMDLs
through the resulting water quality improvements due to increased filtration and plant uptake (i.e.,
nonpoint source pollution prevention).
In addition to improvement in water quality due to reduction in non-point source pollution,
TIMB will improve plant and wildlife habitat and provide increased wetland function over that
which is currently performed by the bank given its current condition.
4
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
3.0
ECOLOGICAL SUITABILITY OF THE SITE
This section contains both the historical and current ecological and physical
information about the Bank Site.
3.1
Land Use
3.1.1
Historical Land Use
The area was cleared of forest and herbaceous wetlands converted to agricultural
use around the turn of the 20th century. This was accomplished via the construction of
levees and water control structures.
3.1.2
Current Land Use
Property is currently used for agricultural purposes. Different management
regimes are utilized for portions of the property. The interior and eastern portions of the
property are more intensively managed with multiple crop rotations per year while the
western portion is only cropped once every other year.
3.2
Soils
The 1996 and current Vermilion Parish Soil Surveys map the soils located on the
site as Ged clay (GE), Gueydan Muck (Gy), Kaplan silt loam (Ka), Edgerly loam (Mr),
Allemands mucky peat (AE), and Midland silty clay loam (Mn). A soil map for the
TIMB is provided as Figure 6.
·
·
·
·
·
·
GE: Ged clay soils are very poorly drained, very slowly permeable soils tht
formed in recent, very fluid clayey alluvium of Pleistocene age. These soils are
on the landward side of freshwater narshes that have encroached on low coastal
prairies. Slopes are less than 1 percent.
Gy: Gueydan Muck silt loam soils are level, very poorly drained, firm, mineral
soils found in former Freshwater Marshes that are drained and protected (by
manmade levees) from flooding. Slopes are less than 1 percent.
Ka: Kaplan silt loam soils are level, somewhat poorly drained soils on broad,
slightly convex ridges on the Gulf Coastal Prairies. These soils are moderately
well suited to woodland. The trees suitable for planting are Water Oak,
Sweetgum, and Green Ash. Slopes are typically less than 1 percent.
Mr: Edgerly loam soils are level, poorly drained soils located on broad flats on
Gulf Coast Prairies. Slopes are less than 1 percent.
AE: Allemands mucky peat soils are level, poorly drained organic soils found in
freshwater marshes. These soils are usually ponded and frequently flooded.
Slopes are less than 1 percent.
Mn: Midland silty clay loam consists of poorly drained, very slowly permeable
soils located within broad flats and in slightly concave areas on the Gulf Coast
5
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Prairies. These soils are moderately well suited to woodland. The trees suitable
for planting are Water Oak, Sweetgum, and Green Ash. Slopes are generally less
than one (1) percent.
A wetland delineation conducted in 2013 confirmed that these soils are present on
site as depicted within the Vermilion Parish Soil Surveys, do present hydric indicators,
and are hydric soils as identified by the Natural Resources Conservation Service.
Agricultural use of this property in the past and present has modified the
topography and hydrology of the project site.
3.3
Hydrology
3.3.1
Historical Hydrology and Drainage Patterns
TIMB is located within the Mermentau watershed and is currently utilized for
agricultural activities including cattle grazing. Prior to agricultural activities, surface
water was able to rise and recede from adjacent drainageways or sheetflow across the
site.
Historical drainage patterns are believed to have been similar to those shown on
Figure 8 as proposed (post-restoration) drainage patterns. The tributary to Warren Canal
which borders the site along its western boundary (and Warren Canal itself along the
southern boundary) are believed to be a historical/natural water features which were
supplanted by the existing canals.
Historical water sources to the Bank included direct precipitation and overbank
flooding from nearby drainageways. Drainage of this property has been impacted by
construction/modification of adjacent drainageways (and associated levees/spoil banks
and culverts), and construction of ditches (and associated levees/spoil banks and culverts)
within the property (see Figure 7). Construction of rice dikes (see Figure 7) also
impacted site drainage.
Jurisdictional determination MVN-2013-01087-SC was issued by CEMVN for
this property on November 19, 2013 (Attachment A).
3.3.2
Existing Hydrology and Drainage Patterns
Natural hydrology has been altered by levees and pumping implemented to
improve site conditions for agriculture (since approximately the 1950's). Currently,
wetlands and drainageways on-site are hydrologically isolated due to spoil banks along
drainageways, elevated roads, and rice dikes (with the exception of the 100.7-acre Fresh
Marsh preservation area). Wetland hydrology on-site is currently driven by direct
precipitation, which is pumped off. Current and proposed drainage patterns are depicted
within Figures 7 and 8. The drainage area associated with the property is depicted in
Figure 9, and elevations (LIDAR and 1-foot contours) are depicted on Figures 10-10d.
6
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
The hydrograph below depicts water levels within the canal along the western
boundary of TIMB and CRMS Station 0572 located along the eastern boundary of TIMB
over an approximate 6 month period. The two hydrographs show similar tidal influence.
The 100.7-acre Fresh Marsh preservation area is not located within areas
impounded by spoil banks along drainageways, elevated roads, and rice dikes; therefore,
water is able to rise and recede within the preservation area (as it does in other
surrounding natural marsh areas).
Those BLH enhancement and re-establishment areas on the site (currently under
pump) have ground elevations ranging from 1.0 to 2.0 feet NGVD. Three reference sites
with healthy BLH communities (shown on Figure 1) were selected within a 1 to 2 mile
distance from the subject property, all of which also had ground elevations ranging from
1.0 to 2.0 feet NGVD.
Those Fresh Marsh re-establishment and rehabilitation areas (currently under
pump) and Fresh Marsh preservation area (not under pump) on the site all have ground
elevations of 0.5 feet NGVD or below. The nearby CRMS station 0572 (3/4 mile from
the subject property) serves as a Fresh Marsh reference site, and has a ground elevation of
0.4 feet NGVD (with a mean water level of 1.18 feet).
Due to current scarcity of Coastal Prairie habitat in this area, no Coastal Prairie
reference sites are available for elevation comparison.
7
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
3.4
Vegetation
3.4.1 Historical Plant Community
Species assemblages historically present on this site can be assumed to have been
similar to existing native habitats in the vicinity of the site and as defined by The Natural
Communities of Louisiana published in 2009 by the Louisiana Department of Wildlife
and Fisheries (LDWF) and the Louisiana Natural Heritage program (LNHP). (See
descriptions of habitat types in Section 2.1 of this Prospectus).
3.4.2
Existing Plant Community
Existing plant communities have been altered due to agricultural use (tilling,
pumping, cattle grazing, etc.). The forested areas within the site boundary are found
along a ridge that runs through the center of the property. This forested area vegetation is
indicative of a by Hackberry - American elm - Green ash Bottonland Forest. The
emergent vegetation found in the fields is indicative of a FACW-OBL community
heavily impacted by hydrologic modification.
Marsh species present in preservation area to the east: Typha latifolia L.,
Sagittaria lancifolia L., Ludwigia grandiflora (Michx.) Greuter & Burdet, Cladium
mariscus (L.) Pohl, Sacciolepis striata (L.) Nash, and Alternanthera philoxeroides
(Mart.) Griseb.
Marsh species present on site: Pontederia cordata L., Sagittaria lancifolia L.,
Alternanthera philoxeroides (Mart.) Griseb., Ipomoea sagittata Poir., and Typha latifolia
L. .
BLH species present on site: Celtis laevigata, Ulmus americana L.,and Fraxinus
pennsylvanica.
3.5
General Need for the Project in this Area
The TIMB is proposed to provide compensatory mitigation for CEMVN approved
projects within the Mermentau watershed, which encompasses approximately 1,150 square miles.
In recent years, the watersheds to be serviced by the TIMB have seen the some of the highest
demand for wetland mitigation in the New Orleans District.
Due to development and agriculture, very little native prairie and forest habitat remains in
the vicinity of the site (see Figure 5), providing limited habitat for migratory birds and terrestrial
wildlife. The restoration of this site will provide 1,375.8 acres of much needed natural habitat.
The site will be converted to a more natural ecosystem, while also improving the water quality in
the receiving waters downstream of this site.
8
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
3.6
Technical Feasibility
The TIMB has the potential to re-establish, rehabilitate, enhance, and preserve
112.9 acres of bottomland hardwood forest (BLH), 287.7 acres of coastal prairie (CP),
and 961.3 acres of fresh marsh (FM). These lands will be protected by a conservation
servitude and maintained by a long-term maintenance and protection fund.
The site is underlain by hydric soils, according to the NRCS soil survey and
verified via field investigations. Despite hydrologic modification of Bank lands, the
hydric soil indicators have persisted.
A tributary to Warren Canal borders the site along its western boundary, and
Warren Canal borders the site along its southern boundary. Following hydrologic
restoration (i.e., removal of rice dikes and removal/gapping of spoil banks), water in
these drainageways will be allowed to rise and recede on Bank lands during high water
events as they did historically.
Reference sites (on-site and adjacent to the site) were used to determine the
species assemblages which historically existed at the project site.
4.0
ESTABLISHMENT OF THE MITIGATION BANK
4.1
Site Restoration Plan
4.1.1
Hydrologic Restoration
Spoil Banks / Elevated Access Roads / Rice Dikes:
Currently, overbank flooding is impeded by spoil banks, elevated roads, and rice
dikes. During flood stages sufficient to overtop these impediments, flood waters become
impounded behind them. Removal of these impediments will contribute to the ability of
flood waters on-site to rise and recede in a more natural regime.
Spoil bank material excavated during restoration will be spread over adjacent
fields so as not to significantly alter topography or will be removed from site.
The access road to remain is currently at grade on the north end and is
approximately 0.5-foot higher than surrounding grade on the south end. Based on
measured water levels in the adjacent canal and the nearby CRMS station, the southern
portion of the access road will be frequently inundated (i.e., will not impact hydrology).
While the access road is not planned to be raised or lowered, low-water crossings will be
installed (if necessary) to further facilitate drainage.
9
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Figure 11 depicts the locations of cross-sections, and Figures 11a-11j are crosssections which depict pre-restoration ground elevations at locations of rice dikes to be
removed and spoil banks to be gapped (40' every 200') and/or removed.
Isle Marrone Drainage District has been consulted with, in regards to the
proposed levees to be gapped and removed along the drainage canals to the west and
south. The Isle Marrone Drainage District has no objection at this time and will be
update periodically if current plan is modified.
4.1.2
Vegetative Restoration
4.1.2.1
BLH Reestablishment and Enhancement Measures
For those 64.2 acres proposed for designation as re-establishment, including
cleared wetland areas (cleared prior to 1970 and having remained cleared since that time),
an appropriate combination of hard and soft mast producing bare-root stock will be
planted. Species assemblages will be selected and planted based on landscape position.
Proposed species assemblages to be planted will be representative of a species assemblage
historically common to surrounding wetland forest and bayous of the area. These species
assemblages are identified in The Natural Communities of Louisiana (Louisiana Natural
Heritage Program, August 2009, available at: http://www.wlf.louisiana.gov). A proposed
species list is presented in Table 3.
Proposed planting spacing in areas designated as re-establishment will be 9'x 9'
(for an initial density of 538 trees per acre) for bare-root stock. Initial / interim planting
success rates for re-establishment areas will be a minimum of 250 trees per acre for bareroot stock. Long-term success for all replanted areas will be 80% canopy coverage.
Escrow or bond sum release rates and monitoring requirements will be consistent with
other recently implemented CEMVN approved mitigation banks.
Those 48.7 acres of the Bank which are designated as enhancement are currently
forested with a mix of native and invasive species and grazed by cattle. The Sponsor will
remove the site from agricultural use, remove/control invasive species, enhance wetland
hydrology, and provide supplemental planting of bare-root stock. Invasive species within
enhancement areas will be removed and stumps will be treated with herbicide. The
existing canopy will be assessed with respect to hard to soft mast ratios, and trees will be
removed as needed. Bare-root stock will be planted to replace those trees removed and in
order to ultimately achieve a hard mast percentage of 50%.
10
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Table 3.
Proposed BLH Species Assemblage to be Planted
Scientific Name
Common Name
(USDA)
Observed
In
Reference
Site(1)
Bottomland Hardwood Hackberry-American Elm-Green Ash
Celtis laevigata
Hackberry
Yes
Ulmus americana L.
American elm
Yes
Fraxinus pennsylvanica
Green ash
Yes
Carya aquatica
Water hickory
Yes
Quercus nigra L.
Water oak
Yes
Quercus phellos L.
Willow oak
Yes
Quercus texana Buckley
Nuttall oak
Yes
Quercus lyrata
Overcup oak
Yes
Liquidambar styraciflua L. Sweetgum
Yes
Acer rubrum L. var.
Drummond's
drummondii (Hook. & Arn. maple
Ex Nutt.) Sarg.
Yes
Wetland
Indicator
Status
Region 2
(USDA)
Percent
Composition
(%)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
FACW
FAC
FACW
OBL
FAC
FACW
FACW
OBL
FAC
12%
12%
12%
10%
10%
10%
10%
10%
7%
Yes
OBL
Recorded In
Vermilion
Parish
(USDA)
(1) A nearby reference site of a natural (healthy) bottomland hardwood community was selected on
which vegetative surveys were conducted.
4.1.2.2
Coastal Prairie Re-establishment Measures
For those 287.7 acres proposed for designation as Coastal Prairie reestablishment, an appropriate assemblage of coastal prairie species will be planted.
Species assemblages will be selected and planted based on landscape position. Proposed
species assemblages to be planted will be representative of a species assemblage
historically common to surrounding wetland prairies of the area. These species
assemblages are identified in The Natural Communities of Louisiana (Louisiana Natural
Heritage Program, August 2009, available at: http://www.wlf.louisiana.gov). A proposed
list of possible species to be planted is presented in Table 4.
Proposed coastal prairie areas designated as re-establishment will be prepared by
applying herbicides and tilling soil to remove invasive species prior to planting. Coastal
prairie areas will be replanted with seed from local suppliers or harvested from local
habitats. Coastal prairie habitat will be maintained by prescribed burning on a 1-3 year
cycle. Escrow or bond sum release rates and monitoring requirements will be consistent
with other recently implemented CEMVN approved mitigation banks.
11
7%
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Table 4.
Proposed Potential Coastal Prairie Species to be Planted
Common Name (USDA)
CP Coefficient of
Conservation
(USGS)
Coastal Prairie
Agalinis fasciculata
Beach Purple False Foxglove
3
Agalinis purpurea
Purple False Foxglove
Scientific Name
W6
Wetland Indicator Status
Region 2 (USDA)
FAC
FACW
Winter Bent Grass
4
FAC
Amsonia tabernaemontana
Eastern Bluestar
6
FACW
Andropogon gerardii
Big Bluestem
9
FAC
Andropogon glomeratus
Bushy Bluestem
3
FACW
Elliot's Bluestem
-
FAC
Andropogon virginicus
Broomsedge
2
FAC
Aristida purpurascens
Three Awn Grass
8
FACW
Arnoglossum ovatum
Egg-leaf Indian Plantain
9
FAC
Tall Blue Aster
-
FACW
Aster puniceus
Roughstem Aster
-
OBL
Bidens aristosa
Beaded Beggar's Ticks
3
FACW
Buchnera Americana
American Blue Hearts
9
FAC
Caric Sedges
-
FACW
Wild Chervil
1
FAC
Coreopsis pubescens
Star Tickseed
-
FAC
Coreopsis tinctoria
Plains Tickseed
3
FAC
Coreopsis tripteris
Tall Tickseed
7
FAC
Toothache Grass
8
FACW
Agrostis hyemalis
Andropogon gyrans
Aster praealtus
Carex spp.
Chaerophyllum tainturieri
Ctenium aromaticum
Dichanthelium commutatum
Variable Panic Grass
W5
Dichanthelium dichotomum
Dichanthelium
b
l
Dichanthelium
acuminatum
Cypress Panic Grass
Panic Grass
Tapered rosette grass
Velvet Panic Grass
Dwarf Spikerush
Elliot Lovegrass
Coastal Love Grass
Showy Daisy Fleabane
Fleabane
Button Snakeroot
Boneset
Roundleaf Boneset
Flat-topped Goldenrod
Vernal Sneezeweed
Narrow Leaf Sunflower
Crimsoneyed Mallow
Soft Rush
W6
Dichanthelium scoparium
Eleocharis parvula
Eragrostis elliottii
Eragrostis refracta
Erigeron philadelphicus
Erigeron strigosus
Eryngium yuccifolium
Eupatorium perfoliatum
Eupatorium rotundifolium
Euthamia leptocephala
Helenium vernale
Helianthus angustifolius
Hibiscus moscheutos
Juncus effusus
12
7
4
W3
0
5
9
4
7
5
5
W7
2
FAC
FAC
OBL
FAC
FACW
OBL
FACW
FACW
FAC
FAC
FAC
FACW
FAC
FACW
FACW
FACW
OBL
FACW
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Scientific Name
Coastal Prairie
Liatris spicata
Lobelia puberula
Muhlenbergia capillaris
Panicum anceps
Panicum virgatum
Paspalum floridanum
Paspalum plicatulum
Penstemon digitalis
Penstemon laxiflorus
Prunella vulgaris
Psoralea simplex
Pycnanthemum albescens
Pycnanthemum muticum
Pycnanthemum tenuifolium
Rhexia mariana
Rhynchospora caduca
Scutellaria integrifolia
Sisyrinchium angustifolium
Solidago rugosa
Solidago sempervirens
Symphyotrichum dumusom
Symphyotrichum lateriflorum
Tradescantia ohiensis
Tridens ambiguus
Tridens strictus
Tripsacum dactyloides
Vernonia gigantea
4.1.2.3
Common Name (USDA)
Blazing Star
Purple Dew Drop
Coastal Muhly Grass
Beaked Switchgrass
Switchgrass
Florida Paspalum
Brownseed Paspalum
Smooth Beardtongue
Beardtongue
Common Self-heal
Single Stem Snakeroot
Whiteleaf Mountain Mint
Lowland Mt. Mint
Thin Leaf Mt. Mint
Maryland Meadow Beauty
Anglestem Beaksedge
Helmet Flower
Narrowleafed Blue-eyed
G
Roughleaf Goldenrod
Seaside Goldenrod
Rice Button Aster
Calico Aster
Common Spiderwort
Pine Barren Tridens
Long-spike Tridens
Eastern Gamma
Giant Ironweed
CP Coefficient of
Conservation
(USGS)
10
8
6
8
6
9
8
2
6
7
7
7
7
9
5
10
W4
4
9
5
Wetland Indicator Status
Region 2 (USDA)
FAC
FACW
FAC
FAC
FAC
FACW
FAC
FAC
FAC
FAC
FAC
FAC
FAC
FACW
FACW
OBL
FAC
FACW
FAC
FACW
FAC
FAC
FAC
FACW
FACW
FAC
FAC
Fresh Marsh Reestablishment & Rehabilitation & Preservation Measures
For those 860.6 acres proposed for designation as Fresh Marsh re-establishment and
rehabilitation, an appropriate assemblage of fresh marsh species will be established via
planting and natural recruitment. Species assemblages will be selected and planted based
on elevation. Proposed species assemblages to be planted will be representative of a
species assemblage historically common to surrounding fresh marsh of the area. These
species assemblages are identified in The Natural Communities of Louisiana (Louisiana
Natural Heritage Program, August 2009, available at: http://www.wlf.louisiana.gov). A
proposed list of possible species to be planted is presented in Table 5.
13
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
Proposed fresh marsh areas designated as re-establishment and rehabilitation will be
prepared by applying herbicides to invasive species, burning, and tilling soil where rice
levees may have compacted soils prior to planting. Fresh marsh areas will be planted
with nursery stock from regional suppliers or seed harvested from adjacent/local habitats.
Escrow or bond sum release rates and monitoring requirements will be consistent with
other recently implemented CEMVN approved mitigation banks.
Table 5.
Proposed Potential Fresh Marsh Species to be established
Scientific Name
Fresh Marsh
Panicum hemitomon
Eleocharis spp.
Sagittaria lancifolia
Sagittaria latifolia
Spartina patens
Bacopa monnieri
Ceratophyllum
Cyperus odoratus
Pontederia cordata
Peltandra virginica
Hydrocotyle spp.
Lemna minor
Nymphaea odorata
Common Name
(USDA)
Wetland Indicator Status Region 2
(USDA)
Maidencane
Spikerush
Bulltongue
Duck potato
Wire grass
Coastal water hyssop
Coontail
Fragrant flatsedge
Pickerelweed
Arrow arum
Pennnyworts
Common duckweed
White waterlilly
OBL
OBL
OBL
OBL
FACW
OBL
OBL
FACW
OBL
OBL
OBL
OBL
OBL
For those 100.7 acres proposed for designation as Fresh Marsh preservation, those areas will
be protected in perpetuity by a conservation servitude. This will provide for connectivity of Fresh
Marsh land to those restored acres to the north and west.
4.1.2.5
Invasive Species Control
Invasive plant species such as Chinese tallowtree (Triadica sebiferum) will be
removed by cutting or herbicidal treatment during initial planting. The percent cover of
invasive plants will be monitored during long-term and short-term success monitoring,
and appropriate action will be taken if needed.
4.1.2.6
Monitoring
Monitoring and reporting activities (to be detailed in the MBI) will be
commensurate with other recently approved mitigation banks and current MBI templates.
14
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
4.2
Current Site Risks
While there is no immediate threat of conversion to a more intensive landuse for
this site (or any known proposed development on any adjacent properties), continued use
of this site for agricultural purposes would further degrade the water quality of the
receiving water bodies and would provide limited benefit to wildlife habitat.
TIMB is free of liens and encumbrances. TIMB and adjacent properties are
within unincorporated land and are absent of zoning regulations.
Louisiana Civil Code, Article 490, treats water resources under the theory of
absolute ownership and rule of capture, provided capture does not result in harm to
neighbors.
4.3
Long-Term Sustainability of the Site
TIMB will be self-sustaining, requiring minimal maintenance after the final
success criteria are met. No structures are proposed or would be necessary to assure
hydrologic or vegetative restoration.
5.0
PROPOSED SERVICE AREA
TIMB is located primarily in the Hydrologic Unit Code (HUC) 08080202.
TIMB will provide BLH mitigation credits primarily to the HUC 08080202 area
and secondarily to the Mermentau drainage basin (HUC 08080201) (Figure 12).
TIMB will provide Coastal Prairie mitigation credits primarily to the HUC
08080202 area and secondarily to HUCs 08080201, 08080203, 08080204, 08080205,
08080206, 08080102, and 08080103 (Figure 13).
TIMB will provide FM mitigation credits primarily to the HUC 08080202 area
and secondarily to the Chenier plains (HUCs 08080206 and 08080103) (Figure 14).
These proposed service areas are consistent with the LRAM and other CEMVN
approved mitigation banks within this region.
15
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
6.0
OPERATION OF THE MITIGATION BANK
6.1
Project Representatives
Sponsor:
Turtle Lake Island Mitigation, LLC
POC: Bart Bellaire
300 Rue Beauregard Suites A
Lafayette, La 70510
Agent:
Pangaea Conservation & Compliance, LLC
P.O. Box 40345
Baton Rouge, LA 70835
Landowner / Long-Term Manager:
Olivia Rae Farms, LLC
POC: Bart Bellaire
300 Rue Beauregard Suites A
Lafayette, La 70510
6.2
Qualifications of the Sponsor
Turtle Lake Island Mitigation staff members have extensive experience in land
management and currently manage thousands of acres for wildlife habitat.
6.3
Proposed Long-Term Ownership and Management Representatives
The long-term owner of the bank is proposed to be Olivia Rae Farms, LLC, and
the long-term management of the bank is proposed to be conducted by Olivia Rae Farms,
LLC.
A long-term maintenance and protection escrow account will provide funding for
long-term boundary maintenance and site protection, into perpetuity. These long-term
maintenance and site protection activities will be conducted by the Sponsor. The
conservation servitude will protect the site from any activities that would diminish the
quality of restored wetlands on the site. No structures are proposed or would be
necessary to assure hydrologic or vegetative restoration.
6.4
Site Protection
TIMB will be protected in perpetuity by a conservation servitude pursuant to
Louisiana Revised Statute 9:1271 et seq. The servitude will be held by U.S. Land
Conservancy (Holder), a conservation-oriented 501(c)(3) organization. The servitude will
inure and run with the property title.
The servitude will prohibit activities, such as clear cutting, fill discharges, cattle
grazing, or other commercial surface development that would diminish the quality or
quantity of restored wetlands.
16
TURTLE ISLAND MITIGATION BANK
PROSPECTUS
6.5
Long-Term Strategy
A long-term maintenance and protection escrow account will provide funding for
long-term boundary maintenance and site protection, into perpetuity. These long-term
maintenance and site protection activities will be conducted by the Sponsor. The
conservation servitude will protect the site from any activities that would diminish the
quality of restored wetlands on the site. No structures are proposed or would be
necessary to assure hydrologic or vegetative restoration.
7.0
REFERENCES
Code of Federal Regulations, Title 33, Parts 325 and 332 and Title 40, Part 230,
as published on pages 19594-19704 in the Federal Register dated 10 April 2008.
United States Department of Agriculture Natural Resources Conservation
Service, Web Soil Survey, Vermilion Parish, Louisiana, Retrieved December 2010.
http://soils.usda.gov/survey/online_surveys/louisiana/index.html
United States Department of Agriculture Natural Resources Conservation
Service, PLANTS Database USDA PLANTS, Retrieved June 2009.
http://plants.usda.gov/
Louisiana Department of Environmental Quality 303(d) Impaired Waterbodies
List, 2016.
17
BLH Reference !
(
Site (1.0'-2.0' NGVD)
CRMS Station
0572 - Marsh
Reference Site
!
( (0.4' NGVD)
!
(
BLH Reference
Site (1.0'-2.0' NGVD)
!
( BLH Reference
Site (1.0'-2.0' NGVD)
Legend
Study Area (1,384.0 ac.)
0
0.5
¯
1
2
Miles
SITE VICINITY MAP
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 1
Date: October 2017
Scale:1:100,000
Legend
Study Area (1,384.0 ac.)
0
¯
1,000
2,000
3,000
4,000
Feet
SITE BOUNDARY
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 2
Date: October 2017
Scale: 1:17,000
Legend
Study Area (1,384.0 ac.)
Prior Converted Farmland (342.9 ac.)
Herbaceous Wetland (757.5 ac.)
Forested Wetland (48.7 ac.)
Spoil Banks (Upland - 70.4 ac.)
Upland (136.7 ac.)
Water (27.8 ac.)
0
¯
1,000
2,000
3,000
4,000
Feet
EXISTING CONDITIONS
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 3
Date: October 2017
Scale: 1:17,000
Legend
Study Area (1,384.0 ac.)
Reestablishment: BLH (64.2 ac.)
Enhancement: BLH (48.7 ac.)
Reestablishment: CP (287.7 ac.)
Reestablishment: FM (204.0 ac.)
Rehabilitation: FM (656.6 ac.)
Preservation: FM (100.7 ac.)
Road to Remain At Grade (2.5 ac.)
Levee to Remain with Gaps (13.9 ac.)
Water (5.7 ac.)
0
¯
1,000
2,000
3,000
4,000
Feet
PROPOSED MITIGATION TYPES
Turtle Lake Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 4
Date: October 2017
Scale: 1:17,500
0 0.25 0.5
1
Miles
Legend
Study Area (1,384.0 ac.)
1 mile buffer around property
GAP Landuse
Agriculture - Cropland - Grass (40.9%)
Fresh Marsh (42.5%)
Upland Forest - Mixed (0.2%)
Vegetated Urban (0.2%)
Water (12.8%)
Wetland Forest - Deciduous (0.4%)
Wetland Scrub/Shrub - Deciduous (2.9%)
¯
LAND USE/LAND COVER WITHIN 1 MILE BUFFER
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 5
Date: October 2017
Scale: 1:50,000
Legend
Study Area (1,384.0 ac.)
Soil - % Hydric
0
5
9
80
90
93
100
Soil Type
AE - Allemands mucky peat
GE - Ged Clay
Gy - Gueydan Muck
Jd - Judice Silty Clay Loam
Ka - Kaplan Silty Clay Loam
Mn - Midland Silty Clay Loam
Mr - Edgerly Loam
0
1,000
W - Water
¯
2,000
Feet
SOILS MAP
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 6
Date: October 2017
Scale: 1:17,000
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
Warren Canal Tributary
!
!
!
!
W
ar
r
0
1,000
2,000
Feet
en
Ca
na
l
"
Legend
Study Area (1,384.0 ac.)
Water
Ditch - Remove (62,686 ft)
Flow Direction
Road to Remain
!
!
Spoil Bank - Gap 40' every 200' (12,521 ft)
Spoil Bank - Remove (97,627 ft)
Pump to
Warren Canal
Rice Dike to be Removed (76,380 ft)
"
¯
Pump - Remove
EXISTING DRAINAGE
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 7
Date: November 2017
Scale: 1:17,000
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
Warren Canal Tributary
NOTES:
(1) Material excavated from levee
gaps is proposed to be used to
construct"hummocks"along interior
side of those portions of the adjacent
"levee to remain".
(2) Figure 15a depicts a plan view &
Figure 15b depicts cross-sections for
both typical levee gap and typical
levee to remain / hummock.
W
ar
r
en
Ca
na
l
Legend
Study Area (1,384.0 ac.)
Water
Post Project Flow
Road to Remain
!
!
¯
0
1,000
Spoil Bank - Gap 40' every 200' (12,521 ft)
PROPOSED DRAINAGE
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 8
Date: November 2017
Scale: 1:17,000
2,000
Feet
Legend
Study Area (1,384 ac.)
Drainage Area (3,238 ac.)
0
¯
0.5
1
2
Miles
DRAINAGE AREA
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 9
Date: October 2017
Scale: 1:75,000
Legend
Study Area (1,384.0 ac.)
LIDAR Elevations
Value
High : 5
Low : -1.5
0
¯
1,000
2,000
Feet
The entire site, with the exception of
portions of the western and southern
levee, lies below elevation 5 ft NGVD.
LIDAR ELEVATIONS
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 10
Date: October 2017
Scale:1:17,000
0
1
1
1
1
1
1 11
1
1
1
1
11
1 1
1
2
2
2
2
2
1 2
2
2
2 2
2
2
2
2
2
11
1
2
1
1
2
1
1
1
1
1
1
1
1
11
1
1
1
1
0
0
1 13 0 2
11
0 0
11
0
0
00
0
0 0
0
0
0 0
1
0
0 0
0
1 11
2
1 1 0
1
0
0 0 2 2 2
0
1
1
1 1
1
1
2
1 2
1
1
1
1
1
3
1
1
0
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1 1
1
1
1 1
1
1
1
1
1 1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
11
1
1
1
1
1 1
1
1
1
1
1
1
1
1
1 1
11
1
1
1
1
1
1
1
11
1
1
1
1
1
1 1
1
1 1
1
1
2
1 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1 1 1
1
2
2
1
1
1
1
1
1
1
1
1
1
1 1
1
2
2
22
2 2
2
12
2 2
2
11
2
1
22
1
1
1
1
2
2
2
2
2
2
1
2
22
1
2
1
2
1
1
1
1
0
1
1
1 1
2
1
1
1
1
1
1
1
1
1 1
1
1
11
2
11
1 0
0
1
22
2
1
1
1
1
1
1
2
1
2
1 2 1 1
1
1
1
1
1
1
1
1
1
0
1
0
0
1
1
1
1
2
2
2
1
1
2
1
1
1
1
1
1
1
1
4
0
4 43 4
5 4 35 5 5 5
1
1
1
1
0
2
1
31
0
1
1
1 2
1 11
1
1
1
2
1
2
2
1
1 1
1
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5
1 1
1
1
5
1
4
44
3 3
4 4
3
1
0
0
1
1
1
1
1
1
1
1
1
1
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1
3
31 4
4
5
1
0
1
2
4
4 344 2
4
4 44
4
4
4 4
1
2
3
2
1 1
1
0
1
1
1
1
1
33 3 2 33 4 4 4 4
4
3
3 3 3 3 3
0
1
0 0 1
1 1
1 1
2
1 1
1
1
1 1
1
1
1
0
2
2
1 1
2 1
1
1
2 1
00
0 0
0
1
1
1
1 11 0
1
1 11 1
4
1
1
1 1
3
4
12
2
4
1
1
1
1
0
1
4
0
3
0
0 0
11
0
0
1
0
0
1
Figure: 10a
Date: October 2017
Scale:1:7,500
1
1
11
1
11
1
1
5
0
0
01
0
1
1
1
1 1
1
1
1
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1 1
1
1
1
1
1.
1
1
1
1
1
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1
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:-
1
1
1
w
1
1
1
1
0
1
1
1 1
-2 1
2
1
1
1
1
1
1
1
LIDAR / 1 FT CONTOUR ELEVATIONS
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
1
1
1
1
Lo
1
3
2 3 04
0 -1-1 2 1
0
-1
0
3
-1
-1
-1 -1
-1
-1
0
0 0
0
0
1
1
1
2
2 2
1
1
1
2
1
1
1
:5
2
0
22
1
2
11
ig
h
1
2
2
2
2
2
1
1
1
1 1
1
0
1
2
2
2
2
2
2
0
1
1
2
1
1
1 1
1
2
1
2
1
1
1
5
1
1
1
1
H
1
1
1
1
1
1
11
1
1
1
0
1
1
0 1
1
2
1
1
0
0
1
1
1
1
2
0
1
0
1
1
1
3
4
1
1
1,000
1 -2 2 0 2
-3 0 1 -1 -1 -2
1
1
1
1
1
1
2
0
1
1
1
1
1
0 00
0
0 0
-2
2 1
4
4
0
1 -1
1 1
1 1
1
1
1
1
1
1
1 1
1
11 1 1
1
1
1
1
1
1
1
4
0 1
1
2
1 1
1
1
1
¯
1
1 1 00 1 0
1
4 1
0
1
10 ft
Value
0
0
0
0 0
0
0
1
9 ft
0 0
22
8 ft
1 3
1
1
7 ft
4
6 ft
0
1
1
4
2
5 ft
-1 3
0 2
1
1
3
2
2
2 1
1
21 0 1
3 ft 1
1 1
4 ft
12
2
2 ft
1
1 ft
1
1
0 ft
5
-1 ft
2
-2 ft
1
-3 ft
1
ELEVATION
423
Study Area (1,384.0 ac.)
2
1
1
Legend
1
0
1
3
0
2
2
2
2
1
3
1
1
2 2
1 4 0 2 0 3 -1 3
44 2 2 3 1
2
2
1
-1 1
3
1
0
1
22
0
2
0
5
1
0
0
0
3
0
1
1
0
2
0
3
1
1
0
0
1
3
1
1
3
00
1
1
-1
0
1
0
1
-1
-1
2 3
1
2
1
1
0 12 1 2 0
1 31
2
1
-1 -1
-1
-1
1
-1
-1
0 1
1
1
1 1 1 1 -1 1 -1 0 1 1 0
1
1
2
2
2
2
2
3
3
23 0 2
4
1
3
3
33
3
3
4 4 4 4
1
4
44 4
44 4
0
0
1
0 1
1
0
1
1 1
1
1
0
1
1
1
1
0
1
1
1
1 1
0
1
01
1
1
1 1
1
1
1
2
0
1
1
1
1
1
1
1 1 1 1
1
0
1
1
1 1
0
1
0 1
1
1
1
1
1
11
1
11
1 1
1
1
1 1
1
1
1
1
1
1
1 1
1
1
1 1
1
1
1
1
1 1
1
1
1
1 11
1
2
1
1
1
1
1 1
0
1
0
1
1
2
2
2
1
0
1
1
1 2
1
1
21 1 2 2
1
22
1
3
3
1
3
1 23
3 3 1
2 2
0 3
1
2 2
1
2
2 2
1 2
2
11
1
2
2
2
2
2
2
2
2
2
2
2
1
1
2
2
2
2
3 2 2 2 2
2
2
1
1 3 3
2
2 2
2
33
1
2
13
1
1
2
1
1
33 3
2 2
3
1
2 2
2
2 2
2
1 1 33 3
2
1
2
1
1 13
2
1
2
1
2
2
2
22 2
1
3 2
2
1 1
2
1 2
2
2
1
2
2
1 1
1
1
2
33
1
1
2
1
2
1
3
1 2
1
1
1
1 2
2
33
1
1
2
1
1
2
3
1
1
1
1
1
1 2 2
1
1
1
1
2
1
1
1
3
1
32
1
1
1
1 1
1
1
1
1
1
2 2
1
1
1
1
2
1
1 1
1
1 33
1 1
1
3
1
11
1
1
1
1
1
1
1
2
1
1
1
1
1 1
1
2
1
1 1
1
2
1
11
1
1
1
11
1
1 1
1
1
1 1
1
1
2
1
1
11
1
1
1
1 1
1
1
1
1 1
1
1
1
1 1
1
0
1
11
1
1
1
1
1
11
1
1
1
1
1
1
1
1 1 1
1
1
1
1
1
1
1
1
1
1
1
2
1 1
1
1
2 0
1
2
1
0
1
1 0
1
11
1
1
1 1
1
1
0
1
1
1
1
0
1
1
1
0
1
0
1
1 1 1 1
1
1
1
1
1
1
1
1
1
1
1 1
1
1 1
2
1
1
1
1
2
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1 1
0
0
1
1
1
1 1
1
1
1
1
1
0
1
1
1
0
1
1 1
1
11
1
1
0
1
0
12,000
1 1
1 1
11
Feet
1
1
1
0 0
1
1
22 2
5
-1
-1
0
0 0
4
4
1 2 0 2
03
1
0
0
0
0
0
0
1
11
1
1
1
0 0
0
1 10 0 2 2 2
1 0
0
3
1
1 2 24 1
0
0
1
0
0
11 1
1
0
0
0
11 1
0
1
00
0
322 1
1
2
1
1
2
1
1
2 1
22
1 2 23 1
2
2
3
33
3
3 33 2
3 3 4 0 2 30 1
1
1 1
2
0
0
1
1
1
2
2
22
1
2
0 0 1 00
0
0
1
1
2
2
2
2
3
3
1
11
1
2
2
2
2
2 2
2
1
2
2
1
1
0
0
2
2
1
1 1
1 1
2
2
1 2
1
2 1
2 1 1
1
1 1
1
1
1
1
1
1
2
2
1
1
2
1
2 21
1
2
10
1
1
1
1
1
1
1
1
1
1
1
1
1
2
0 0
1
0 0
1
1
1
1
1
1 1
2 2 1
1 2
2
2
10
10
1
1
1 2
1 1
1 2 2
1
1 1 1
1
0
0
0
Figure: 10
Date: October 2017
Scale:1:7,500
1
1
1
0
0
0
0
0
0 0
0
0
0
0
0
0
1
2
00
0
1
0
11
0 1
1 23
1
1
0
2 11
1
1
2
1
0
1
2
1
1
2 1
1
0
1
1
1
1 1
1
1
1
1
0
12
1
2
0
0
0
1
2
1
2
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3
0
0
2
2
2
1
0
00
0
0
0
1
0
1
2
2
2
1
1
0
0
0
2
0
1
2
1
2
1 1
0 1
Lo 0 2 2 3
1
1
3
0
1 1
1
11
w
11
3
1
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1. 0 0 0
1
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0 0
1
0
0 0
1
2
10
0
00 0
1
1
1 1
1
0
1
0
0 0
1
0
2
0
1
0
1
1 1
1
1
1
1
1
2
1 1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1 1
1
1
1 1
2
1
3
0
2
21
3
:5
0
1
1
2
1
ig
h
2
2
1
1 1 1
2
0
1
0
1 1
0
2
2
1 1
2
2
1
1
1
1
1
0
1
0
0
0
2
1
2
1
1
1
0
1
0 0
0 0
1
0 0
0
3 1 1
1
32
0
1
1
1
0
1
1
1
1
1
111
1
1
1
1
1
1
1
0
0
0
1
2
1
1
1
1
1 1
1
1
0
1
1
1
1
1 1
2
1
1
1
0
1
0
0
0
0
1
0
0
0
0
0
1
0
1
0
LIDAR / 1 FT CONTOUR ELEVATIONS
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
1
1
2
1
1
1
11 1
0
1
0
0
2
1
1
1
11
0
0
0
1
1
2
1
1
1 1 1
1
H
0
0
1
1
1
1
1
1
1
1
1
1 11
1
1
0
1
1
1
1
1
¯
1
1
1
1
1
3 32
2
1
0 0
1
0
1
1
1
1
1
22 3
2
0
3 1
1 ELEVATION
0
0
-1
0
1
1
1
2
1
2
1
1
1
1 1
-3 ft
2 1
3 3
1
1
33
1 1
1
0
-2 ft
1
11
1
0
0
2
1
1
1
1 33 3
1
1 0
0
0
00
-11 ft
1 1
1
1
2
1
11
0
3
0
1
1
2
23
0
3 1
2
0 ft
1
2
0
0
21
0 0
3
1 11
1
1
1
3
1
1
1
1 ft
2
31 1
11
1
2
1
1 2
0
1
1
1
1
2 ft 1
2 1
1
1
2
1
1
1 111
1
1 11
1 1
23
2 1
1
3 ft
1
2 0 1 11 0
1
1
1
1
0
1
0
1
0 2
2
12
2
31 1 3
0
0
1
1
1
4
ft
1
1
1
2 2 21 1
0
1
2 1 12
0
22
1 1 1 5 ft
0
0
0 0
1 1
2
1
0
1
0
11 2 2
1 11
1
2
6 ft
0 0
1
2 2
0
0
2
1
1
1
0 0
7 ft 1
11
2 1
1
2
0
1
0
1
1 0
11
8 ft
0
2
1
1
21
1 1
2
2
0 0
2
0
9 ft1
2
1
1
1
1
1 10 ft
1
2
21 2 0
0
1
1
2 2 2
Value
1
1
1
0
0
2
1
0
0
1
1
0 21
0
0
1
1
0 0
1
2
1
0
1
2 2
1
0
0
2
2 2
1 1
2
0
0
1
1
2
2
0
2
1
0
3
2
1
1
2
2 2
33 3
1
3 1
1
31
1 1
2 1
0
0 0
3
0
0
0
1,0000
2,000
1
0
1
1 1
0
11
0 2
2 1
-1
1 1
Feet
1
0
1
1
1 1
1
2
0
1
12 3 1
0 0
0
1
Study Area (1,384.0 ac.) 1
2
1
12
1
1
1
1
1 0
0
0
0
0
0
1
1
0 2 3 10
0
1
2
2
2
2
0 0
1
3 2 0
0
0
0
0
1
1
1
1
1
11
1
1
1
1
00
0
0
0
0
0
0
1 2 1 00
0 0
0
0
0
0
0
0
0
0
1
-1 0
0
00
1
0
0
0
1
0
11
1 1
1 1
0
0
1
1
1
0
1 1 0 0 0
1
1 1
21 2
0
0
1
2 1
1
00 0
0 0
1 0
3
4
0 3 1 204
1 0 0 20 3 0 1
0 0
0
0
1
22
11
1
1
1
1
1
1 1
1 1
11
1
1
1
1
1 11
1
0
0
0
0
1
1
1
4
0
0
0
1
1
1
1
1
1
1
1
1 1
3 4 5 0 50
1
1
11
11
1 1
2
2
1
11
1 1 1
1
1
1
1
1
2
1
1
1
1
2 1
11
2
2
1
2
1
1
1
2
1
1
1 1 1
1
1
1
2
1
11
1
1
2
2
2
2
2
1 1
1
1
1
1
2
2
2
2
2
2
2
1 2
2
2
2
1
1
1
11
0
1
11
1
1
1
1
1
1
1
2
1
1
1
1
11
1
1
1
1
1
2
1
1
22
1
3
2
1
0
0
1
2
1
0
2 -1
1
1
1
1
1
2
1
0
0
2
2 2
2 2 2
0
1
2
1
00 0
1
0
2
0
2
1
0
10
0
0
1
0
1
1
1
0
0
0
1
1 0
0
0
0
0
1 0
11
0
0 0
1
1
1
1
11
1
1
0
1
0
0
0
1
1
1 1
0
0
1
0
0
-1
0
1
0
0
0 0
0
1
1
1
0 -1
2
1 1
1
0 0
1
1
1
1
0
1
11
1
1
1
0
0
1
1 2
1
1
2
1
0
1
1
1
1
1
1 1
2 1
1
1 1
0
1
1
1
1
1 1
1 1
1
1
1
1
0
0
1
1
1
2
1
1
1 1
1
2
0
0
-1 0
0
0
1
1
2
1
1
1
2
2
1
1
11
1
1
1
1
2
2
1 1
1
1 1 2
1
1
2
2
1
1
1
2 2
2
2
2
Legend
1 2
2
1 1
1
1
2
1
1 1
1 1
1
2
2
2 2 2
2
2
2
2
2
2
2
2
2
22
2
1
1
2
2
2
2
2
2
2
2
2
1
2
2
2
2
22
2
2
2
2
2
2
2
2
2
2 2
2 1
10 2
2 2
22
11
1
1
1
1
12
1
1
1
1
0
2
1
1
1
11 1
1
1 1
1
1
1
1 1
2 2 1
2 2
1
1
1
1
1
11 1
1 1
1
1
1 1
1 1
1 1 1
1
1
1 1
1 1
2
1
2
1
1
1
1
1
1 1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2 1
1
1
4 2 3
0
0
1
1 45 5 2
3 5 2 4 41
0
3
0
30
1
0
0
0
0
3 0 0
1
1
1
0
0 3 0 2 0 2 0 2 10 0
1 1 1
0
0
3
32 0 0
2
1
21
0
0 01 3 20 0
0
0
0
0
0
1 2 3 2
0
0
0
0
1
0
1
0
0 0 0
0 0
0
1 1
0 0
1
1
0
1
4
5
1
51
0
0
122
12 1
21 1 1
3
3 1 4 1 2 34 4
1
0 10
1 -1 1
2
3 3 3
1
0
3
1
1
1
1
0
1 1
0
0
0 1
0
0
1
0
0
0
1
1
0
2 2
0
0
1
1
1 1
2
2
1
11
1
1
1
11
1
1
1
1
1 1
1
1
1 1
1
1
1 1 31 3
1 1 13 3 3 3
1
1 1 31 2 3
0
0 0
2
1
1 1 2
0
0
0
0
0
0
-1
00
0
0 0 0
00 0
0
0
0
1
1 1
0 0
1
1
1
0
0 0
0 0
0
0
01
1 1
1
0
1
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2
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0
0
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1
0
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1 1
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1
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5
5 4 35 5
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1
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-1
1
1
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0
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1
1
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0
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64
2 1
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0 0
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1
1
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1
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1
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1
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2
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1
1
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1 1
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7
3
3
1
1
1
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1
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1
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1
1
1
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3
4
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3
3
3
3
1
1
1
1
1
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3
1
1
11 1
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1
1
1
1
1
1
1
1
1
1
1
31
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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1
1
1
1
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1
1
0
1
0
0
1
1
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3
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1
1
1
2
0
2
1
1
1
1
0
1
1
1
1
1
1
6
2
1
1
3
1
1 1
1
1
1
0
1
1
1
1 1 1
1 1
5
2
1
3
4 3
2
3
2
1
3
1
3
2
1
1
1
1
1 1
1
Figure: 10c
Date: October 2017
Scale:1:7,500
4
6
1
4 2
3
2
1
0 333
0
0
0 0
1
0
3 0
0
0
1 1 1
1
11 1 1
1
1 1
1 1
1
1
2
34
0
14
1
00
2
3 1
2
2
21
3
1
1
1
11
3
1
12
2
3
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1
5
1
1
1
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5
5
1
1
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11
3 3
0
3
22
0
2
1
1
1
1
1
3
1
2
4
3
33 3
2
31 1
4
1 1
3
3
2 1
1
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3 3 3 1
3
4
3
1
3
1
3
0
2
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1
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3
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31 1211
2 1 1
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5
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2
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1
1
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31
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1
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1
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2
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2
3
1
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2
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44
22
32
1
1
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1
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1
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0
2
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:-
1
2
5
1
3
1
3
1
5
1
1
1
1
2
1
1
1
1
LIDAR / 1 FT CONTOUR ELEVATIONS
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
0
6
6
3
2
2 2
11
1
1
11
1
1
1
1
1
5
5 1
2
2
3
1
2
1
3
3
1
w
0
11
3
1 4
1
2
1
1
1
1
2
-2
1
0
13 1
3
1
1
0
4
2
3
2 1
3
1
1
1
1
1
1
2
2
1
2
2
1
2
1
1 1
-1 0 3 1
1
4
5
1
3
1
11 1
2
1
1
2
2
0
3
2
3
4
2
2
2 2
2
1
2
12
1
4
5 1
0
0
1
0 0
1
0
3
3
2
1
2
2
11 1
1
1
1
1
1
2
4
3
2
3
3
3
1
2
2
1
2
2 2
1
2
3
1 2
2
2
1
11
0
1 0
0
1 1
1
2
3 3
33
3
2
2 1
2
1
0
1
0
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1
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1
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1
2
1
1
3
2
2
2
2
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ig 1 11 1
h
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o
2 1
1
0
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1
1
1
1
1
1
1
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2
2
3
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2
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1
0
1
1
1
2
1
11
1
H
0
0
1
4
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11
¯
1
1
4
1 3
1 1
1
2
2
3
2 1
1 1
1 1
0
1
1
1
1
0
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1
1
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1
2
1
1
1
1
1
1
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0
33
1
0
0
1
2
2
1
1
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2
1
3
1
43
1 1
1
2
0
0 0
0 0 20 0
1 1
1
1
1
3 2
0
3
2 11
1
2
0 0
1
1
3
2
0
1
1
1
3
1
1
0
1
0
2
1
0
1
3
1
3
1
0 2 21 2
1
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0 0
1
2 2
23 1
1
1
1
3
1 1 0 0
0
3
0
3 3
12 1
1 2
1
3
1
Legend
3
4
1
2 3
1
33
1 1
2
2 2 2 2
1
2 3 2
Study Area (1,384.0
ac.)
0
2
4
2
2
1 4
2
22 1
3
2
2
2 12
ELEVATION
3
-1
3
2
2
0
2
1 1
-1
0
2
-3
-3 -3 -3
0
2 1
2 23
2
33
-3 ft
2
43
0 0
1
2
1
1
2
0
2
2
32 3
-2 ft
1
0
2
2
0
3 3
0 0
-1 ft
23
4
1
1
5
4
1
1
3
1
5
0 ft
1
3
1 0
2
-3
1
3 32
3
2
2
0
1 ft
3
2
2
0
1
11
0
2 2
2
5
6
2
53
2 ft
1
2
2
2
2
2
1
1
3
5 3
2
1
1
1
2
1
2 2
1
3 ft
6 2
11
1
3
1
2
2
2 1
0
0
3
1 11
3
4 ft
3
1
2
2 2 1
2
1
1
7 5
3
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-2 5 ft
2
1
1
1
6
2
3
5
1
3
2
1
3
2
1
1
2
2
5
6 ft 1 1
1
1
1
2
2
1
1
2
4
1 1
5
2 1
1 1
71 ft 1
1
2
1
0
4 11 3
1
55 2
1
5
3
1 1 3
1
5
2
3 1
1
8 ft 2
1
3
1
5
1
1
4
11
2
1
2
1
4
2 0
1
91ft 1
2 2 1
1
1
2
1
1
1
1
5
4
2
1
1
3
1
1
1
5 4
1
2
3
10 1ft
1
1 3 2
2
1
1 Value 1 1
4
2
1
2
1
2
1
1 1
3 5
11
1
1
22
2
2
1
45
1 1
1
1
1
2 1
3
1
2
2
1
1
4 2 4
1 1
2
2
2
1
2
2
1
7
1
1
1
1
1
2
67
22
3 5
2
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8
1
2
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1 1
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1
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5
1
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1
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5
1
1
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4
2
1
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22
1
1
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3
3
11
11
1
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1
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22 2
12
2 2
0
1,000
2,000
1
2 20 1 1
1
1
3 2 23
1
2
1
4
1
1
1
Feet
1
1
5 52 4 2 5 5 3
1
1
1
1
5
1
1
1
1 11
1
2
-2 1 -1 0
-1
0 0
0
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1 11
1 1 1
1
2
1.
2
1
6
1 1 13 3
5
3
3
3
11
2
1
1
22
1
1
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2
1 1
2
1 1
1
3
1
2
1
2
1
1 1
1 1
13 3
0
1
2
0
1
33
2
1
1
0
0
33
0
1
2
0
-1
1
33
11
3
0
0
0
1 1
33
0
0
3
0
1
10
2
0
2
1
1
1
4 3
22
0
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1
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5 3 3
1 1
1 1
4
0
3 3
1
10
2 4 4 423
1 2
5
5
1
1
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1
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4
2
2
44
544
2
11
4 2
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1
0
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1
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1
2
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0
2
0 1
2
1
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0
1
1
1
2
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5
2
3
12 1
1
2
2
2
1
3
0
1
2
2
10
0 1
2
1
1
1
1
0
1
1
2
0 1
1
1
5
1
0
2
43
2
2
0
2
0
2
3
2 3
0
23 3
9
0
3
8
7
2
3 3
1 1 1
5
7
0
1
0
7 8
1 1 7 88
43
0
1 22
1 1 1
2
0
2
0
3 3 3
0
1
7
2
0
3
7
2
0
7
2
11
3 33
0
2 2
0
4 3
7
2
3 1 34
1 0 0 0
1
1 1
22
0
3
1
0
3
3
1
3
1
0
1 1
0
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11
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2
1
2
3
2
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1
1 0 3 3 34
0
0
1
1
0
1 0
3
0
2
20
1
2
1
0
0
1
3 3 434 3
2
1
7
1
1
1
1
3
1
2
2
3
00
0
0
0
1
3 33 2
1
2
1 1
1
11 2
3 3
0
0
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2
1
1
2
0
0
1 1
2
2 1 3
5
3 3 13 1 0
21
0
0
2
0
0
3
2
2
0
2
11
0
2
2
01 2 3 0
0
5
2
1
3 33 3 3
0
2
1
2
0
3
5
2 33
4
2
0
2 2
00
33
0
1
2
2
5
0
0
2
5
2
4
3
0
1
0
23
0
2
2
3
1 5 5 0
12
4
1
1 2
1
0
2
3
0
2
1
1
00
2
1 1
4
00
1 1
1 1
1
2
-1
4 4
0 -1
1
0 0
1
2
0 1 11 3
0
1
1
2
21
1 1
-1 2
1
1
1
2
-1 -1
2 2
2 1
11
2
3
-1
1
1 01
1
33 3
1
10
0
2
2 3
1
1
1
1
33
1
1
1
1
1
3
0
1
0
2
3
1
1
1
2
3
1
1
1
1 1 1
1
2
1
1
3
1
1
1
2
1
1
1
1
1
1
2
11
1
3
1
1 1 1
1
1
1
1
3 3
1
1
1
1
2
1
1
1
1
0
1
1
1
1
3
3
1
1
1
11
1
1 1
1
1
2
1
1 1
1
1 1
1
1 1
1
11
1 2
1
1
1
1
0
1
2
1
1
1
0
1
1
1
1
0
2
0
1
1
1
1 1
1
1 1
3
23
1
1
1
0 1
1
2 0 5 3 5 42
0
1
1 0
3
3
1
4
1
1
1
1
2
0
1
1
1
1 1
1
1 11
1
1
1
1
0 3
1
1 1
1
4
1
1 3
1
33
0
2
1
1
1
3
0
-1
0
1
0
2
0 0
0
1
1
2
-1
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3
0
0
2 2 0
2 2
1
1
302 0
0
-1
33
1
1
1
1
1
2 2
0 0
1
4
2
2
1
3 01
3
0
2
2
0
1
2
0
11
2
21
1
1
3
0
2
1 11
1
1
1
1
1 0
0
022
01
21 3
1
0
0
1
0
0
0
0
0
0
0
1
0
1
0 21 2 1
1
1
1
11
0
00
0
0
0
1 0
2
1
0
0
10
1
2 2 2
1
1
1
1
1
0
0
1 1
0
0
0 0
0
1 1
0
0 0 0
0
0
0
0 0
1
1
0
0
0
0
2 1
2
0
0
0
0
0
0
11
112 2
0
0
2
1
1 1 2
1
12 1
1
0
1
1 1
0
1 1
1
1
11
0
1
0
0
0 0
0 0
0
0
4 2 0
1 0
0
0
1 1
0
0
1
1
0
0 2
0
4
1
2
1
3
0
0
1
1 1
2
2
1
00
0
0
0
1
1
1
01
0
0
1
1
1
1
41
2
1
0
0
2 11 1
1 1
1
1
1 1
1
1
1
1
1
-1
1
2
1
1
1
1
1
1
-1
1
1
1
-1
1
0
0
1
1
0
1
1
1
1 1
1 1
11
1
1
0
1
5
0
6
1
0
2
3
5
1
0
1
1
0
1
1 0
0
6
6
6
1 1
0
1
4 55
1
1 1 1
0
1
2 3 0
1
3
-1 0
0
3
1
1
3 2
1
0
0
2
1
2
1
3
2
32
4
1
2
0 0
1
3
7 3
1
1
1
2
0
1
0
1
0
1 3
0 5
0
1
0
11
1 5
2
1
6
1 Legend 1
1
5
1
5 0
21 1 1 1
1
1 5
3 1
1
5 2
2 Study
Area (1,384.0 ac.)
4
10
1
1
0
4
1
2 0
1
0
1
1
2
1
1
6
2
ELEVATION
0
1
32
1
1 2
1
3
5
1
0 0
1
2
0
2
-3 1ft
54 2
1
22
4
0
1
3
1
1 5
1
1
0
-2 ft 2
1
5 54
3
2
75 2
2 2
2
0 0 01 0
5
0
1
1
4
7
-1 ft 2 1
1
1
3
0 0 0
0
2
1
22
2
2
1
0
1
3 02 ft
1
4 5 78
2
2
0
1
0
4
1
4 22 1
1
3
1
4
0
3 0
1 ft 1
1
1
2
1
1
2
0
1
1
1
1 1
1 1
3
2 ft
1
1
1
1 1
1
3 2 22
21
3
6
1
1
7
3
ft
2
0
1
12
312
1
2
1 1
2
2 2 13 2
1
1
65 1
1 1
1
1
5
4
4
2
3
4 ft
1
4
3
1 1
5 45 5 5
1
8 4 6 34
2
5
1
1
1
3 2
1
6
5 2
5 ft
11
1
5
1 1
3
2
52 5
6 ft 1 2
1
1 1 2
1
1
22 2
7
1
1
1
7
ft
2
1
1
1
2
2
1
2
1
7
1
1
1
3
22
1
1
1
7
1
8 ft 1 1
1
1
1
1
6
1 1
2 2
1
2
1
1
1
1
2
2
1
9 ft
2
2
1
2
1
2 11
1
1
1
1
1
2
1
1
7
10 ft
1
1
1
2
1
1
2
1
1
1
2
2
11
65
1
2
2
4 2
1
2
1 Value
1
4 34 3 1 3
1 3 3
12 3 5
1
1
1 2
2
22 3 2
5
1
1 1
2
1 5
2
2
1
1
1
2
1
3 2
1
2
6
2 2
1
1
22
2
4
1 1 2
1
2
33
1
2
3
5
1
1
3
1
1
1
1 1
2
2
2
1
1 11
5
2
1
2
1
1 1
2
11
1
2 1
2 1 2 2
2
6
1
2
1
5
1
1
1 1 2
3
2
2
1
2 5
2
2
2 1
3
3
2
2
5
1
5
2
2 1
2
1
2
3
2
2
1
1,000
2
2 1 2,000 1
2 10
4
1
5 2 2
5
3
2
2
Feet
1
2
2
1 1
1
2
1
2
23
2
4
1
3
2
51
2
1
0
1
1
4
1
2
3
4
3
3
3
2
2
1
1
1
2
1
1
1 2
2 1
:-
1
1 1 1
w
1
1
2
4
2
2
2
1
4
2
1
5
2
2
4
2
2
2
2
2
2
2
3
2
1
2
1
4
1
2
1
1
1
1 1
1
2
1
1
1
2
2
1
1 1 2
2
121
3 6
1
2
2
2
32
2
3
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
1
1
1
1
2
5
2
2
1
Lo
1
2
2
3
2
2 1
1
2
6
2
1
2
7
2 2
2
2
3
2
4
3
1 11
1 1
1
1 11
1
1
7
6
2
1
1
1
1
1
1
1
1
1
1
0
1
1
1
2
4
3
2
2
1
2
12 2 1 1
1
2
1 1
2 1
4
4 5 7
1 2
3
3
2
5
1
7
2
1
2
4 23 5
2 2
12
1
1
1
1
2
1 1
1
1
5
7 1
3
3
4 4 4
2
2
1
1
1
:5
1
1
1
1
2
1
1
2
2
2
1
1
0
1
0
6
7
7
12
1
0
0
1
1 1 1
4
3
1
2
0
1
0
0
0
4
5
2 2 8 6
8 1
3
3
1
21
1
1
0
0
1
33
9
2
1
1
1
1
1
1
1 1
1
1
1
3 31
9
2
1 11
1
1
1
1
11
1
1
5
1
5
2
5
1
2
1
3 1
3
1
2
ig
h
1
1 1
1
2
1
5
1
1
2
0
3 33
5
33
H
1
1
1
3
2
1
0
0
1 1
6
3
5 2
1
2
1
5
1
1
1 1
3
¯
LIDAR / 1 FT CONTOUR ELEVATIONS
Figure: 10d
Date: October 2017
Scale:1:8,500
1 11
1 1 1
1
2
1.
2
1
6
1 1 13 3
5
3
3
3
11
2
1
1
22
1
1
0 0
2
1 1
2
1 1
1
3
1
2
1
2
1
1 1
1 1
13 3
0
1
2
0
1
33
2
1
1
0
0
33
0
1
2
0
-1
1
33
11
3
0
0
0
1 1
33
0
0
3
0
1
10
2
0
2
1
1
1
4 3
22
0
1 0
1
3 3 3
5 3 3
1 1
1 1
4
0
3 3
1
10
2 4 4 423
1 2
5
5
1
1
5 4
0 1
3
2 2
1
2 4
4
2
2
44
544
2
11
4 2
2
2 3 2
1
0
0 2220
1
2
2
2
1
2
2
1
2
0
2
0 1
2
1
0
2
0
1
1
1
2
2 2
5
2
3
12 1
1
2
2
2
1
3
0
1
2
2
10
0 1
2
1
1
1
1
0
1
1
2
0 1
1
1
5
1
0
2
43
2
2
0
2
0
2
3
2 3
0
23 3
9
0
3
8
7
2
3 3
1 1 1
5
7
0
1
0
7 8
1 1 7 88
43
0
1 22
1 1 1
2
0
2
0
3 3 3
0
1
7
2
0
3
7
2
0
7
2
11
3 33
0
2 2
0
4 3
7
2
3 1 34
1 0 0 0
1
1 1
22
0
3
1
0
3
3
1
3
1
0
1 1
0
0
00
11
33 3
2
1
2
3
2
0 0
1
1 0 3 3 34
0
0
1
1
0
1 0
3
0
2
20
1
2
1
0
0
1
3 3 434 3
2
1
7
1
1
1
1
3
1
2
2
3
00
0
0
0
1
3 33 2
1
2
1 1
1
11 2
3 3
0
0
1 21 4
2
1
1
2
0
0
1 1
2
2 1 3
5
3 3 13 1 0
21
0
0
2
0
0
3
2
2
0
2
11
0
2
2
01 2 3 0
0
5
2
1
3 33 3 3
0
2
1
2
0
3
5
2 33
4
2
0
2 2
00
33
0
1
2
2
5
0
0
2
5
2
4
3
0
1
0
23
0
2
2
3
1 5 5 0
12
4
1
1 2
1
0
2
3
0
2
1
1
00
2
1 1
4
00
1 1
1 1
1
2
-1
4 4
0 -1
1
0 0
1
2
0 1 11 3
0
1
1
2
21
1 1
-1 2
1
1
1
2
-1 -1
2 2
2 1
11
2
3
-1
1
1 01
1
33 3
1
10
0
2
2 3
1
1
1
1
33
1
1
1
1
1
3
0
1
0
2
3
1
1
1
2
3
1
1
1
1 1 1
1
2
1
1
3
1
1
1
2
1
1
1
1
1
1
2
11
1
3
1
1 1 1
1
1
1
1
3 3
1
1
1
1
2
1
1
1
1
0
1
1
1
1
3
3
1
1
1
11
1
1 1
1
1
2
1
1 1
1
1 1
1
1 1
1
11
1 2
1
1
1
1
0
1
2
1
1
1
0
1
1
1
1
0
2
0
1
1
1
1 1
1
1 1
3
23
1
1
1
0 1
1
2 0 5 3 5 42
0
1
1 0
3
3
1
4
1
1
1
1
2
0
1
1
1
1 1
1
1 11
1
1
1
1
0 3
1
1 1
1
4
1
1 3
1
33
0
2
1
1
1
3
0
-1
0
1
0
2
0 0
0
1
1
2
-1
-1
3
0
0
2 2 0
2 2
1
1
302 0
0
-1
33
1
1
1
1
1
2 2
0 0
1
4
2
2
1
3 01
3
0
2
2
0
1
2
0
11
2
21
1
1
3
0
2
1 11
1
1
1
1
1 0
0
022
01
21 3
1
0
0
1
0
0
0
0
0
0
0
1
0
1
0 21 2 1
1
1
1
11
0
00
0
0
0
1 0
2
1
0
0
10
1
2 2 2
1
1
1
1
1
0
0
1 1
0
0
0 0
0
1 1
0
0 0 0
0
0
0
0 0
1
1
0
0
0
0
2 1
2
0
0
0
0
0
0
11
112 2
0
0
2
1
1 1 2
1
12 1
1
0
1
1 1
0
1 1
1
1
11
0
1
0
0
0 0
0 0
0
0
4 2 0
1 0
0
0
1 1
0
0
1
1
0
0 2
0
4
1
2
1
3
0
0
1
1 1
2
2
1
00
0
0
0
1
1
1
01
0
0
1
1
1
1
41
2
1
0
0
2 11 1
1 1
1
1
1 1
1
1
1
1
1
-1
1
2
1
1
1
1
1
1
-1
1
1
1
-1
1
0
0
1
1
0
1
1
1
1 1
1 1
11
1
1
0
1
5
0
6
1
0
2
3
5
1
0
1
1
0
1
1 0
0
6
6
6
1 1
0
1
4 55
1
1 1 1
0
1
2 3 0
1
3
-1 0
0
3
1
1
3 2
1
0
0
2
1
2
1
3
2
32
4
1
2
0 0
1
3
7 3
1
1
1
2
0
1
0
1
0
1 3
0 5
0
1
0
11
1 5
2
1
6
1 Legend 1
1
5
1
5 0
21 1 1 1
1
1 5
3 1
1
5 2
2 Study
Area (1,384.0 ac.)
4
10
1
1
0
4
1
2 0
1
0
1
1
2
1
1
6
2
ELEVATION
0
1
32
1
1 2
1
3
5
1
0 0
1
2
0
2
-3 1ft
54 2
1
22
4
0
1
3
1
1 5
1
1
0
-2 ft 2
1
5 54
3
2
75 2
2 2
2
0 0 01 0
5
0
1
1
4
7
-1 ft 2 1
1
1
3
0 0 0
0
2
1
22
2
2
1
0
1
3 02 ft
1
4 5 78
2
2
0
1
0
4
1
4 22 1
1
3
1
4
0
3 0
1 ft 1
1
1
2
1
1
2
0
1
1
1
1 1
1 1
3
2 ft
1
1
1
1 1
1
3 2 22
21
3
6
1
1
7
3
ft
2
0
1
12
312
1
2
1 1
2
2 2 13 2
1
1
65 1
1 1
1
1
5
4
4
2
3
4 ft
1
4
3
1 1
5 45 5 5
1
8 4 6 34
2
5
1
1
1
3 2
1
6
5 2
5 ft
11
1
5
1 1
3
2
52 5
6 ft 1 2
1
1 1 2
1
1
22 2
7
1
1
1
7
ft
2
1
1
1
2
2
1
2
1
7
1
1
1
3
22
1
1
1
7
1
8 ft 1 1
1
1
1
1
6
1 1
2 2
1
2
1
1
1
1
2
2
1
9 ft
2
2
1
2
1
2 11
1
1
1
1
1
2
1
1
7
10 ft
1
1
1
2
1
1
2
1
1
1
2
2
11
65
1
2
2
4 2
1
2
1 Value
1
4 34 3 1 3
1 3 3
12 3 5
1
1
1 2
2
22 3 2
5
1
1 1
2
1 5
2
2
1
1
1
2
1
3 2
1
2
6
2 2
1
1
22
2
4
1 1 2
1
2
33
1
2
3
5
1
1
3
1
1
1
1 1
2
2
2
1
1 11
5
2
1
2
1
1 1
2
11
1
2 1
2 1 2 2
2
6
1
2
1
5
1
1
1 1 2
3
2
2
1
2 5
2
2
2 1
3
3
2
2
5
1
5
2
2 1
2
1
2
3
2
2
1
1,000
2
2 1 2,000 1
2 10
4
1
5 2 2
5
3
2
2
Feet
1
2
2
1 1
1
2
1
2
23
2
4
1
3
2
51
2
1
0
1
1
4
1
2
3
4
3
3
3
2
2
1
1
1
2
1
1
1 2
2 1
:-
1
1 1 1
w
1
1
2
4
2
2
2
1
4
2
1
5
2
2
4
2
2
2
2
2
2
2
3
2
1
2
1
4
1
2
1
1
1
1 1
1
2
1
1
1
2
2
1
1 1 2
2
121
3 6
1
2
2
2
32
2
3
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
1
1
1
1
2
5
2
2
1
Lo
1
2
2
3
2
2 1
1
2
6
2
1
2
7
2 2
2
2
3
2
4
3
1 11
1 1
1
1 11
1
1
7
6
2
1
1
1
1
1
1
1
1
1
1
0
1
1
1
2
4
3
2
2
1
2
12 2 1 1
1
2
1 1
2 1
4
4 5 7
1 2
3
3
2
5
1
7
2
1
2
4 23 5
2 2
12
1
1
1
1
2
1 1
1
1
5
7 1
3
3
4 4 4
2
2
1
1
1
:5
1
1
1
1
2
1
1
2
2
2
1
1
0
1
0
6
7
7
12
1
0
0
1
1 1 1
4
3
1
2
0
1
0
0
0
4
5
2 2 8 6
8 1
3
3
1
21
1
1
0
0
1
33
9
2
1
1
1
1
1
1
1 1
1
1
1
3 31
9
2
1 11
1
1
1
1
11
1
1
5
1
5
2
5
1
2
1
3 1
3
1
2
ig
h
1
1 1
1
2
1
5
1
1
2
0
3 33
5
33
H
1
1
1
3
2
1
0
0
1 1
6
3
5 2
1
2
1
5
1
1
1 1
3
¯
LIDAR / 1 FT CONTOUR ELEVATIONS
Figure: 10d
Date: October 2017
Scale:1:8,500
FIGURE 11
FIGURE 11a
FIGURE 11b
FIGURE 11c
FIGURE 11d
FIGURE 11e
FIGURE 11f
FIGURE 11g
FIGURE 11h
FIGURE 11i
FIGURE 11j
0
5 10
20
30
40
Miles
U
V
35
Whisky Chitto
08080204
Bayou Teche
08080102
Amite
08070202
Lower Sabine
12010005
Tangipahoa
Vermilion 08070205
08080103
Mermentau
08080202
Tickfaw
08070203
West Fork Calcasieu
08080205
Mermentau Headwaters
08080201
Upper Calcasieu
08080203
Lower Grand
08070300
Lake Maurepas
08070204
Atchafalaya
08080101
Lower Calcasieu
08080206
Sabine Lake
12040201
Mermentau
08080202
Vermilion
08080103
East Central Lo
0809
West Central Louisiana Coastal
08090302
Legend
State Boundary
Primary Service Area
Project Area
State Coastal Zone Boundary
8 Digit Hydrologic Unit Code
¯
BOTTOMLAND HARDWOOD SERVICE AREA MAP
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 12
Date: October 2017
Scale: 1:1,300,000
0
5 10
20
30
40
Miles
Whisky Chitto
08080204
Tangipahoa
08070205
Bayou Teche
08080102
Lower Sabine
12010005
Amite
08070202
West Fork Calcasieu
08080205
Tickfaw
08070203
Mermentau Headwaters
08080201
Lower Grand
08070300
Atchafalaya
08080101
Upper Calcasieu
08080203
Lake
Maurepas
08070204
Lower Calcasieu
08080206
Sabine Lake
12040201
Mermentau
08080202
Vermilion
08080103
East Central
Louisiana Coastal
08090301
West Central Louisiana Coastal
08090302
Legend
State Boundary
Primary Service Area
Project Area
State Coastal Zone Boundary
8 Digit Hydrologic Unit Code
¯
FRESH MARSH SERVICE AREA MAP
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 13
Date: October 2017
Scale: 1:1,300,000
0 5 10
20
30
Little
08040304
40
Miles
Lower Red
08040301
Lower Sabine
12010005
Whisky Chitto
08080204
Bayou Teche
08080102
Amite
08070202
Tickfaw
08070203
West Fork Calcasieu
08080205
Mermentau Headwaters
08080201
Upper Calcasieu
08080203
Lower Grand
08070300
Vermilion
08080103
Lower Calcasieu
08080206
Mermentau
08080202
Sabine Lake
12040201
Lake Maurepas
08070204
Atchafalaya
08080101
West Central
Louisiana
Coastal
08090302
East Central
Louisiana
Coastal
08090301
Legend
State Boundary
Primary Coastal Prairie Service Area
Project Area
State Coastal Zone Boundary
8 Digit Hydrologic Unit Code
¯
COASTAL PRAIRIE SERVICE AREA MAP
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 14
Date: October 2017
Scale: 1:1,600,000
ATTACHMENT A
Legend
Property Boundary (1,384.0 ac.)
Forested Wetlands (48.7 ac.)
Herbaceous Wetlands (757.5 ac.)
Prior Converted Wetlands (315.2 ac.)
Uplands (234.9 ac.)
Waters (27.8 ac.)
0
¯
1,000
2,000
3,000
4,000
Feet
WETLANDS (from Jurisdictional Determination)
Turtle Island Mitigation Bank
Vermilion Parish, Louisiana
Figure: 1
Date: November 2017
Scale: 1:16,500