|
UNAPPROVED Mayor
Schools started the meeting, which was an informational meeting to get started
on the inlet project. The main
purpose of this meeting is for the permitting agencies to come forth with
whatever concerns or issues they feel need to be dealt with and for Tom Jarrett
to present what the project is going to be.
There will be time, at the end of the meeting, for public comment. Self
introduction was done and those present at the meeting were: Doji Marks, Emerald
Isle Commissioner; Floyd Messner, Emerald Isle Commissioner; Dick Eckhardt,
Commissioner, Emerald Isle; Art Schools, Mayor of Emerald Isle; Frank Rush, Town
Manager of Emerald Isle; Emily Farmer, Commission of Emerald Isle; Pat McElraft,
Commissioner of Emerald Isle; John Dorney, Division of Water Quality; Tere
Barrett, Division of Coastal Management, Morehead City; Joanne Steeenhuig,
Division of Water Quality, Wilmington; Keith Harris, Corps of Engineers; Larry
Calame, Corps of Engineers; Mickey Sugg, Corps of Engineers;
David Allen, North Carolina Wild Life; Tracy Rice, U.S. Fish &
Wildlife Service; John Ellis, U.S. Fish & Wildlife Service; Ron Sechler,
National Marine Fisheries Service; Ted Tyndall, Coastal Management, Morehead
City; Tom Jarrett, Coastal Planning & Engineering; Cheryl Miller, Coastal
Planning & Engineering; Cynthia (?),
North Carolina Wildlife; Rick Monahan, Division of Marine Fisheries; Jeff
Hudson, Deputy Manager, Onslow County Government; Gregory Rudolph, Carteret
County Shore Protection Manager; Sam Bland, Hammocks Beach State Park.
Mayor Schools introduced Carolyn Custy, who put together all todays
meeting. Others attending were: Bennett Wynne, North Carolina Wildlife Resources
Commission; Nicole Mihnovets, North Carolina Wildlife Resources Commission.
Tom
Jarrett, Coastal Planning Engineers, Inc., took the floor and made a slide
presentation on their proposal and he hoped to cover most of the aspects of the
proposed project. Basically, the project is aimed at two purposes, primary
purpose of this particular project is to move the inlet channel away from the
Pointe area, located on the west end of Emerald Isle. The secondary purpose is
to provide beach quality material to nourish a portion of the Emerald Isle
shoreline. The problem with the
channel is back in 1981 the channel was pretty much located in the general
vicinity of where the Town would like to see it relocated.
At that particular time the west end of Emerald Isle was characterized by
a sand spit and there were loads of sand which was moveing off the west end of
Emerald Isle into the inlet and actually building up and contributing to the
growth of this spit. Over a period
of time the channel has moved quite rapidly, actually, to the east and has
infringed upon the point and has infringed upon the point’s development,
located on the extreme west end of Emerald Isle. As this channel has moved over, of course, it’s caused
rather extensive damage and problems to the point area. Coastal Science and Engineering, who did a preliminary report
for moving the inlet channel over, came up with a rate of easterly migration of
the channel of around one hundred seventy feet (170’) per year from 1975 to
2001. The Corps of Engineers had a
report when they looked at the movement of the channel between 1985 and 1999.
That report indicated one hundred ninety feet (190’) per year.
The attempts by the Town and local residents to protect the end of Inlet
Drive and save their private investments have obviously not been doing a very
good job. The end result here doesn’t seem to be a very environmentally
friendly solution. The residents
continue to apply more sandbags trying to save their investment and Mr. Jarrett
believes preparations were just completed for additional sandbags. The
proposal is to try to reposition the channel away from the Pointe area and put
it back into a location where it has historically been in the past and also take
the material out of the channel, and to use it to augment or supplement the
permitted beach nourishment program for Emerald Isle.
At this point in time the Town design is not finalized but looking at the
cut through the ebb tide delta to the inlet the town is dealing somewhere in the
neighborhood of 800,000 to 1,500,000 cubic yards pf sand.
The permit for placement of the sand on the shoreline calls for
forty-five cubic yards of material per linear foot of beach and that nourishment
would begin about a mile and one half east of Bogue Inlet.
The
800,000 to 1,500,000 cubic yards of inlet material, at a placement rate of
forty-five cubic yards per foot could nourish between 17,800 feet and 3,300
33,000 feet. This should cover all
or a portion of Reach One, which measures 22,500 feet, again beginning a mile
and a half from Bogue Inlet and possibly portions of Reach Two, just depends on
the size of the channel that is ultimately selected and the size of the channel
will depend upon flow characteristics and coastal concerns, that will be
mentioned later on. The portions of
Emerald Isle that will not be nourished or wouldn’t be nourished by the inlet
material will be nourished with the approved bar rim located in “A” and bar
area “B-2”. The work on the bar area “A” and bar area “B-2” is
scheduled to begin this fall. So the determination of the channel size, location
and the volume of material that will be coming out of the inlet needs to be
established basically before the next phase of the Bogue Banks Project is begun.
Coastal Planning Engineering has the task of coming up with a channel
design recommendation prior to the issuance of the contract for the east end of
Emerald Isle. Most of the concerns over messing around with the
inlet of course come with what possible impacts any modification of the inlet
flow regime or channel network may have on the adjacent shorelines, may have on
the estuary portions of what’s called the flood tide delta, inner stream
marshes. Basically, what Coastal Planning and Engineering is proposing to do in
trying to come up with the impacts of a channel reorientation or channel
relocation is to use Mother Nature as a model.
There is a very robust photographic history of Bogue Inlet dating back to
1938 up until present. Most of this
aerial photography is available through the Corps of Engineers. Coastal Planning
Engineers has already obtained copies of most of those aerial photographs and
have begun to digitize them into a kind of database correcting for scale and
what have you. Dr. William Cleary
out of the University of North Carolina at Wilmington, will be the lead
scientist conducting this geomorphic analysis.
C.P.E. will take that robust photographic history and come up with
changes in the shoreline, position on both of the adjacent shorelines, Hammocks
Beach State Park and the west end of Emerald Isle, reaching about a mile and a
half to two miles across the inlet. We
will look at changes in the east and west shoulder positions, the position and
orientation of the ebb tide delta channel, the shape and area of the ebb tide
delta. Mr. Jarrrett clarified for
those who may not be familiar with the term “ebb tide delta”, that’s the
ocean bar. We’ll also be looking
at the flood tide delta, that’s the part inside, behind the inlet, on the
windward side and then the island and other marsh areas that make up the whole
flood tide environment. Mr. Jarrett said the inlet shoulders that we’re talking
about are really these shorelines here.The shoreline changes that we’re mainly
concerned with following some kind of channel modification, will be at Hammocks
Beach State Park where there is erosion and on the west end, and Emerald Isle
where there is increased erosion. A
cursory examination of what’s happened in the past, 1982 the channel was
pretty much again centrally located in an area where the Town may be interested
in trying to place the new channel. At
that particular time the extreme east end of Hammocks Beach State Park was
rather wide, actually and there was a rather narrow shoreline on the extreme
west end of Emerald Isle. Over
time, as the channel moved over to the Pointe, what happened was that the east
end of Hammocks Beach State Park eroded quite a bit, about 300 to 400 feet, but
the extreme west end of Emerald Isle increased, in this case 250 to 300 feet.
So what that kind of tell us, and what we expect to see when we go
through the robust analysis, or the analysis of the robust data set, is that if
this channel is repositioned back to some centralized location we could expect
that the east end of Hammock’s Beach State Park would again build seaward and
there may be some loss of shoreline on the ocean face here on the west end of
Emerald Isle. But again, what will happen is that we will get a
reconstruction of this spit off of the Pointe area.
So there may be some sacrifice to be made in this area, some gain to be
made in this area, but then again a gain to be made in the area of the Pointe Picking
a few examples from what mother nature is trying to tell us about the behavior
of Bogue Inlet.In 1972 the channel occupied a very similar location to where it
is today. Maybe not quite as bad as
it is currently, but there was certainly a considerable amount of erosion going
on and it showed the existence of a flood channel right next to the Pointe, you
could see the State had placed some temporary sandbags structures there in an
attempt to protect the Pointe. The ocean bar channel or the ebb tide delta
channel were actually moved over a little bit to the west.
By 1976 the channel had again breached through the middle of the ebb tide
delta. What happened is this channel just kind of almost instantaneously
repositioned itself. In 1976 the Corps actually went out and dredged Bogue Inlet
without an authorization simply to provide access to the Coast Guard.
They were having difficulty operating out of the Swansboro Station over
here on the back side of the west end of Emerald Isle so the Corps actually went
in there and did some emergency dredging. It
is interesting to look at this particular picture and look at the magnitude or
the size of this dredging activity compared to the overall environment that
it’s working in. C.S.E. has speculated that perhaps some of this dredging
activity has contributed to the build up of the volume of material on the
shoals, but Mr. Jarrett said he would stand here and say that he doubted that
would be very much of a factor because this dredge can only cast material 90’
to the side and can’t reach over here. A
lot of material that the dredge reportedly removed was probably handled more
than once. The dredge, the volumes
that are reported by the Corps, range around 100, 150, maybe 200 thousand cubic
yards a year, but again if you go in and look at what they are really reporting
and the amount of time they had the pumps on, the dredge down and material was
going through the pumps and out the pipe, a lot of that material, cast over to
the side 90’ on one pass, and comes back the next time and pass over that same
area and pick up that same material. When
you look at actual before and after dredging surveys of the channel which tells
you what the net amount of material was removed, it is probably about half of
what the Corps reports. Mr. Jarrett
did think any indication that this dredging activity has contributed to the
buildup, apparent buildup, of material along the ebb tide delta is maybe a bit
of a stretch. From
the analysis of the shoreline changes and the other changes in the inlet, we
hope to come up with some kind of relationships between the channel position and
the location of these north shoulders, that is the strip area on the west end of
Emerald Isle at the point and the spit on the east end of Hammocks Beach State
Park. Just looking at a cursory
analysis of the aerial photography there would seem to be a definite
relationship between the position of those particular shorelines and the inlet
channel. It is not unique to Bogue
Inlet. There are plenty of studies
of other inlets, and some that I’ve done, pretty much indicate the same thing,
that that channel location really drives what’s going on along the adjacent
shorelines because not only does it drive the shoreline position of the channel
location and probably influences the shape of the spit, it also influences the
shape of the ebb tide delta. When this channel is centrally located what happens
over on Hammocks Beach State Park is that you have a build up of material on
this side that provides some wave sheltering and current sheltering to this
particular end of the island and therefore there would be a tendency for the
island to actually grow seaward. On
the other hand, along the west end of Emerald Isle, if you move this channel
over and then this side of the ebb tide delta actually becomes smaller or
actually displaces farther to the west, the west end of Emerald Isle then
becomes more exposed and that’s why you see a concurrent recession of the
shoreline on this side when the channel is centrally located.
That is a typical kind of response that we’ve been able to observe in
many other inlets that we’ve studied. Those
are the kinds of relationships that we’ll be trying to develop, some type of
numerical relationship between the channel position and shoreline behavior, the
orientation of the channel and position versus the adjacent shoreline, further
removed, say a mile and a half, two miles from the inlet.
The channel position versus the flood tide delta chamber again, how does
the shape of the ebb tide delta, how does it change with the change in channel
position? Then again, going on the
inside, looking at the changes in the flood tide portion of the inlet, not only
Dudley Island, but any other marsh islands and sub-tidal sand flats that exist
in the bay. Again, we will have an opportunity for the agencies to
comment later on and we’ll go into more detail, I’m trying to go through
this rather hurriedly but I will allow sufficient time for the agency comments
and any comments from the floor. Getting
into the Geotechnical investigations, we will be doing what we call some jet
probe exploration on the ebb tide delta to try to hone in on the best channel
location within that corridor that will provide the optimum material
characteristics for placing on the beach. I
know the quality of borrow 7 , has become a major issue, not only on Bogue Banks
but up and down the Coast and our main purpose here for doing the jet probe
evaluations are to find these characteristics of material that would be removed
with the channel relocation. The
first phase of that would be to go out with what’s called jet probe, that’s
nothing more than just a 2” pipe that has a water jet going through it.
Divers are sent down who are trained geologists and they take the probe
into the bottom and as the jet washes into the sand bottom the material that is
churned up around the side of the jet and they are there visually observing
material that comes to the surface and sampling it as it comes to the surface so
you end up with a pretty good idea of that jet probe goes all the way down to
the full twenty foot depth what the composite characteristics of the material
are below the surface. When I say
composite, because you’re not sampling a layer, a lot of the material is mixed
as it comes to the surface so you end up with some idea of what a dredge would
pick up if it was in there working. That
marterial comes to the surface and is piled up around the base of the pipe, the
geologist will grab samples and put them into bags and document them and then
they will log in, as best they can tell, what kind of bottom layers the probe
goes through on the way to the bottom. This
is the generalized plan that we have to cover that whole corridor.
Again, at this stage, without focusing in on any one particular
alignment, we’re looking at a wide range of options where, actually in the
past, the channel has had some natural position well within this corridor.
So we will be doing the jet probes basically over this area here.
Once the jet probes are done, then we move into the next more detailed
phase of what’s called “Virbracore”.
The “Vibracore” is again a sub-surface investigation tool that is
basically a three and one half inch diameter pipe mounted on a tripod that
actually vibrates. There is a big
vibrator on top of it that vibrates on top and works that vibracore into the
bottom and as it does there’s a plastic casing inside that steel casing and
material rises up and is contained within that tube. Once the tube is full, as they bring the vibracore up, and it
is put up on deck of the boat, they take out the plastic liner, there may be
some hidden stuff going on, they pull out the plastic liner, this is the plastic
liner that’s inside the steel casing, and then they actually split the core
right on board the vessel so that they will have instant feedback of the
characteristics of the material at that particular location.
Once that material is identified, then the boat moves on to another spot
and drills another core. Currently,
the previous engineers, Coastal Science and Engineering, have taken ten
vibracore’s in the inlet. That
information on the quality of the material is available.
The Corps of Engineers, as part of the Bogue Banks feasibility study, is
going to be taking an additional seven or eight cores, pretty much along the
edge of the channel. If they
haven’t started already, they should be starting soon.
C.P.E. will take the results of the jet probe data, existing vibracore
data, the core data and combine that with five, perhaps ten more vibracores to
melt down the quality of this material. To
give you some example of what I would expect to see coming out of Bogue Inlet,
would be material similar to what came out of Shallotte Inlet that was placed on
Ocean Isle Beach. The quality of that material should be fairly indicative of
what we would expect to see coming out of Bogue Banks.
After all, the material that is on the ebb tide delta is simply material
washed off the beach, got trapped by the currents, and is sitting there.
There shouldn’t be the problem with the compatibility of that material
that seemed to come up with some of the off shore bar areas.
One
of the more important things we need to do in the overall design is to come up
with a channel size and position that we feel will provide us with the
longest-lived channel, one that would be capable of capturing the flow and
becoming a permanent deep-water channel through the inlet.
That’s very important because the Corps has indicated that should a
relocated channel become the dominant channel then they will then focus their
maintenance activities in that deep-water channel.
That’s not to say that that channel will stay centrally located forever
because after all, if you go back and look at where the Corps have been dredging
that channel over the years, it just simply followed the easterly movement of
that channel over time. That little
gray area that I showed the picture of is not capable of keeping that channel
centrally located and the project we are formulating is simply to allow that
particular dredge to go in and dredge along the deep-water channel.
That particular dredge, even though it’s a shallow draft dredge, still
requires five and a half to six feet of water to flush.
If there’s not that amount of water in the channel either at high tide
or low water you can’t even work, so the impact of that dredging will be able
to hold an alignment that’s always been good.At least if you move the channel
back over and you dredge a relatively deep, relatively wide channel, what we
will do as part of the analysis, is look at the shoal characteristics of the
relocated channel and try to predict what the long term fate of that channel
will be, ultimately knowing that it will follow, of course eventually fill and
begin to move to the east again, but it should involve a considerable amount of
time. After all the Corps is
conducting their feasibility study and I would imagine that you are also going
to be looking at Bogue Inlet as a possible renewable source of beach nourishment
material for the over-all Bogue Banks Project, not to say that Bogue Inlet could
be the source of sand for the entire island, there is no way.
The Inlet Project could serve as a source of sediment for the extreme
west end of Bogue Banks and also maintain the channel in a centralized location
and continue to protect the point. The
circulation model will basically model the total currents in and out of the
Inlet. Flows back into the White
Oak River channel and connecting channel back to the waterway will be looked at.
We’ll look at currents even in the waterway up into the White Oak
River, so this whole estuary/ocean system will be Hydrodynamic modeled to come
up with the current flow regime as dictated by the current configuration of the
deltas. Then we will reposition the
channel artificially in the model, we’ll put an artificial channel in.
Basically everything will be kept the same, but we’ll model the flows and
basically constituent transport surrounding, if you will, through the system to
see what kind of changes that new channel would impose on current in the back
bays and on the potential for impact on salinity.
Then the third run, we’d actually seal off this channel, assuming that
this would become the dominate channel, this feature would close, and then we
would run the model again and see what kind of impact that third iteration has
on the same thing, currents and flow and currents and salinity.
Mr.
Jarrett introduced Cheryl Miller, who is from Boca Raton, Florida and has many
years of experience working on environmental issues down there, many of which
are probably a lot more complicated than the ones we deal with.
Cheryl comes here today with a wealth of information, a wealth of
experience, and I’ll turn it over to her. Ms.
Miller said, I’m a marine biologist with Coastal Planning and Engineering.
I’m actually going to go through this rather quickly. This is to give
you kind of a background of what we are going to be dealing with and what needs
to be addressed during the environmental impact analysis associated with this
project. Where we are right now?
We are identifying the agency’s and public’s concerns and to insure
we have client committee meeting requirements.
Now there’s an existing GIF for the permanent beach project.
We now have to determine how to address the channel relocation and that
sand as a nourishment source. Second,
environmental inventory, is to identify and characterize resources and define
the baseline positions. Again the
baseline position of the project area beach and surf zone has been established
for the permanent beach renourishment project as well as a monitoring program
having been implemented to provide information on the repopulation of the beach
and surf zone. What’s new for
this project is the baseline condition of the ebb, which would be the ebb flood
tidal shoals, as well as to determine if the existing information is adequate to
define a baseline condition and to allow us to perform an impact assessment.
If there isn’t enough information existing for that baseline then we
have to do additional studies to determine what the impact will be upon these
resources. A lot of attention
has been brought to human impact analysis in the recent past, very complex,
complicated process that is really involved.
What we’re looking at in this project, project specific, is the if the
channel relocation will cause human impact upon the population that will be
impacted by this project. Some
of the new habitats that we have to address, that could be impacted, is the
inter-tidal flats. Tidal flats come
with potential loss of piping plover feeding habitat as well as for other shore
birds, not just the piping plover. Tom
Jarrett mentioned what a big part of the environmental impact analysis will be,
as it relates to the physical changes and the habitat and how those physical
changes will then possibly impact the resources within that system.
So if modeling then shows potential limited impacts whether or not those
limited changes are going to be significant to the organisms that live within
that system. A big issue that we
are going to be looking at is the compatibility suitability analysis.
That’s where sea turtle nesting substrates as well as repopulation or
recolonization by the benthic infauna and lastly to be addressed in this
analysis is then a perfect mitigation for removal, potential removal, for the
intertidal habitat, whether or not this is going to be a temporary or permanent
loss of inter-tidal habitat and that would then be looking at reformation of the
western spit by any of the modeling. To
address the additional fish, essential fish habitat concerns associated with the
channel relocation. There will be
the temporary elevated turbidity effects as well as alteration of the movement
pattern as well as successful inlet passage for larvae, post larvae, juveniles
and adults of marine and estuarine organisms that goes through the inlet.
We know right now that the existing federal navigation maintenance
temporarily elevates turbidity and alters movement of life stages though the
inlet. The task will need to determine whether or not this project will elevate
turbidity and alteration patterns. The
two new areas to be looked at for the channel relocation are coastal inlet as
well as inter-tidal flats. The
final step in any environmental impact analysis is an attempt to mitigate any
significant cumulative impact.
Ms. Miller opened the meeting up for discussion at this point. Mayor
Schools - Are there any special comments before we get going?
There’s a couple of hands in the audience that went up and what we said
in the beginning was is there’s going to be time at the end of this meeting
for public comment but during the time we are at now is really just for the
permitting agencies to be putting out comments for Tom and Cheryl.
Commissioner
Emily Farmer - Public comment is also extremely important.
We know that there are some people in the audience who are, I see one
geologist, and we absolutely need to hear any issues that you all bring up.
We don’t want surprises again. Mickey
Sugg , Corps of Engineers, - At this time, you don’t know if this is going to
be a short-term fix or a long-term fix, correct? Tom
Jarrett , C.P.E. - This is a, from the Town of Emerald Isle, it’s a one time
proposal. I don’t believe the
Town is making any plans to re-do it. Mickey
Sugg, Corps of Engineers, - Any
maintenance or just basically federal? Tom
Jarrett - The Corps certainly will probably look at the Bogue Inlet as a
possible combination of the existing navigation project if they can come up with
a comprehensive salinazation scheme. The
deal would be, where the opportunity exists, to combine the navigation and the
beach project. Mickey
Sugg - Are you going to let the old inlet, when you put the new channel in, how
are you going to stop? Are you
going to put a material in the front or just let the water take its course or? Tom
Jarrett – The plan right now, and of course as we get through the analysis and
do the modeling and start looking at current velocities that will change.
But right at the moment I wouldn’t propose putting material in that
existing channel, I would just let it shoal naturally. The indications seem to
be that that’s the way mother nature pretty much did it in the past and would
be a breach through the ebb tide delta and the existing channel over here that
would tend to close, so again, using the inlet history as a basic model we will
then formulate the final plan on that, but right now I wouldn’t recommend
putting any material in there. You’d probably spend your whole budget trying to close that
channel. (Unidentified
agency attendee) But you will be constricting that channel down. Tom
Jarrett – Part of the analysis will be looking at what size channel is needed
to capture the major part of the flow. We’ll
be looking at stability analysis criteria that exists with the larger tidal,
tidal inlets that have been closed but those same theories are applicable even
to a channel itself. So we can look
at the dimensions of the channel the characteristics, input to the channel and
come up with a reasonable channel design that will be big enough to assume the
major part of the flow through the inlet and by doing that then this channel
would become secondary channel when this one closed. One
thing Mickey Sugg pointed out that when you look at the dimensions of the
channel don’t let the amount of beach nourishment material dictate the size of
the channel. I mean, that needs to
be about as natural, don’t go any deeper or wider just because you need more
sand on the beach. Tom
Jarrett answered a question about the pipeline dredge going off shore and
said– No, as far as I understand it, we’re not, we didn’t do the project,
but as far as I know those are approved only for very shallow depth.
An ocean certified pipeline dredge requires a much deeper cut in order to
operate efficiently. The cutter head on the dredge is probably seven feet, eight
feet in diameter. In order for him
to operate efficiently he must to be able to cut down six or seven feet into the
bottom so that most of his cutter head is below the surface, is sucking up
mostly sand and water. The hopper
dredge can only skim the surface and it may dredge a small section on each pass.
The approved borrow areas are only approved for a cut say two to three
feet, maybe four, I’m not sure exactly, but those aren’t conducive to the
use of the pipeline dredge so unless the alternate borrow areas were modified
with additional environmental studies to allow a deeper cut, those can’t be
used, a pipe line dredge can’t be used efficiently in those areas. Frank
Rush – The Town is currently, you know we’re moving forward on the eastern
phase for this fall and we are investigating the possibility of amending that
permit to use a pipeline dredge off shore to make a deeper cut in the earlier
stages of dredging. Tom
Jarrett - There’s two different firms still operating, CSE still has the main,
Coastal Science and Engineering, still has the main contract to complete the
Bogue Banks beach nourishment project. The
Bogue Inlet Project is the one being conducted by the Town of Emerald Isle as a
possible way of again, addressing the severe erosion problem at the point but
then also providing a high quality source of sand for a portion of their
project. If they could accomplish
both goals using the inlet, then they would not then use a portion of that
offshore bar area to nourish whatever western part of their shoreline could be
nourished with the inlet. Tom
Jarrett – Cheryl can attest to dredging in this area, across the ebb tide
delta, from my understanding, that’s not really a high habitat area for the
turtles, they generally like to lay around in the shale.
This channel will be cut with a pipeline dredge and as Tracy Rice, U.S.
Fish and Wildlife Service has pointed out, generally has a low propensity to
take turtles, they do on occasion take turtles, but the instance is very rare.
You will also be working in an area that is usually devoid of turtles in
this area. It would be conducted
during the supposed time frame when turtles have left the area. There may be
some need to control the dredging period by water temperature rather than by
some arbitrary date but we will certainly look at that as a confirming issue.
Again, we are told that this is probably the best of all worlds in terms
of you all having to nourish your beach and you’re need to protect the point
of the inlet and relocate the channel.You end up with high quality material that
simply came right off the beach, put it back where it came from and you allow
the inlet to then undergo a natural readjustment to that repositioned channel.
Commissioner
Farmer - that was precisely why we wanted to see if we could get the permit
modified. So that we would not be
getting into the turtle takes problem. Tom
Jarrett – One thing I meant to point out. Bill Cleary and I will be attempting
to get some definition of these inter tidal sand flats, but it’s a very
complicated deal when you go through time and you look at the changes that have
gone on back here. I mean, in one particular picture you know, it’s pretty
clear. Yeah, there’s some tidal flats but then you’ve got some aerial
features popping up. You look back
here at the flood tide shield protecting Dudley Island, now that particular
feature seems to be pretty consistent throughout all the aerial photography
I’ve looked at regardless of where this channel is.
If you go forward to 1976 here’s the channel right there in the
position where the Town is maybe interested in putting it, yet you still have
this massive sand flat out here. So, we are trying to define the aerial extent
of the flood tide delta.Do I use this channel, this photograph, or go back to
another one, that the channel is kind of obscured.
We will be looking at basically trying to get some kind of handle on the
size of the sand spits on the
aerials. It
has been noticed that the east and west estuary channel are much more open and
connected.It seems to be one complete system and as the channel migrates to
either east or west, those two close off. They
kind of separate. Tom
Jarrett – Interesting that is pointed out because Bill Cleary suggested
perhaps the maintenance dredging done in the disconnecting channel back to the
waterway may influence to some extent the distribution of flow in these two
channel and so actually, that was one thing we were going to look at but
didn’t publicize because we weren’t sure what the results were going to
show, whether we could use them primarily because we don’t have adequate
drainage back here but certainly there is a definite relationship probably
between this flow and the channel
location as well as possibly some influence on a dredging done on a connecting
channel. The
question was asked if it is known if this is sort of simplistic but for your
model and all, but I was just wondering, if you know, with these photos, what
tide schedule they had, because they really affect how much you can see the
shoals and all. Tom
Jarrett – It certainly does and of course you can get some idea of looking at
the marsh islands and the water levels. I wouldn’t stand here today and tell
you that the analysis of photographic shorelines is you know, going to give you
100% correct answers. So what we
have indicated to the Town were their concerns and our concerns over what’s
going to happen on the ocean facing beach on the west end of Emerald Isle.
We are going to provide them with a predicted response, but then we are
going to put some pretty wide error band around that response, because we are
dealing with shoreline conditions that may on any particular photograph vary, so
you have a wide error in just determining that shoreline position.
Tom
Jarrett – Actually that came out of the plan formulation that the Coastal
Science and Engineering did for all of Bogue Banks but basically the reason is,
if you look at this west end of Emerald Isle, we are about a mile and a half to
the north. It is highly influenced
by this ebb tide delta position and the channel position. That’s why I say
when the channel is laying over toward the point, as it is in this photograph,
the west end of Emerald Isle actually differs for that mile and a half distance.
Couldn’t
that material have been deposited from material from Coast Guard Channel as
well? Tom
Jarrett - The Corps of Engineers also places material beginning about 1,500 feet
from the inlet. This connecting
channel and the waterway dredging, that beach quality material has been
deposited along this section of shoreline, so the combination of the inlet
impact and the disposal has pretty well stabilized this particular stretch of
shoreline, and like I said, it does appear somewhat on this channel position
that some of the other analysis that I have done, even back in the 1800’s to
present, have traditionally shown this portion of the island to be fairly
stable. Again, if you move this
channel then you are going to have to be concerned with what happens then.
Again, the 1981 position showed that when that channel was over here this
shoreline was another 250-300 feet back. Now
that may be O.K. because the development may be further, far enough back to not
be impacted by that but we are going to have to provide the Town with enough
information so that they can make an educated and reasonable decision on whether
or not, the changes that are going to occur here are worth the risk. Mickey
Sugg - I assume that sand is migrating from east to west at this end of the
island? Tom
Jarrett – More than likely this sediment regime is dominant from east to west
but there are very frequent and persistent reversals in the sand transport
direction. There is a big influence
out of the southwest so I would suspect that there is a high, not predominance
necessarily, but a very substantial wave energy comes out of this direction.
The wave climatologic is pretty much the question. But anyway, it does
appear that in this particular area you may start to be influenced by a lot of
the southwesterly transport. Mickey
Sugg - If you left the channel location like it is now, let’s say you didn’t
do any relocation, do you think it would gradually start migrating back to the
left? Tom
Jarrett – It would definitely move, not necessarily migrate, I think you look
at the history of the inlet, it has a tendency to just blow out, abandon this
channel and reopen another one. Some contend that the dredging activity by the
Corps is maybe discouraging that, is keeping a channel with enough hydraulic
efficiency to maintain that position and prevent that recurring. Mickey
Sugg - Because when you look at alternatives in your permit, I mean you would
look at that, you know, location. Tom
Jarrett – I think without that you can pretty well kiss some of these
buildings good-by. Tom
Jarrett – Who is going to stand here and tell you that this thing is going to
stop here, it’s going to stop here, it’s going to stop there.
John Wells did some studies earlier on that based on his analysis, I
think he did some planning studies for the Town and his analysis actually showed
that there could be some risk of developing the point back in, from this point
west. So, this area is very dynamic, I couldn’t stand here today and tell you
the thing will stop, it’s not going to move again.
It’s pretty obvious to me that sandbags don’t offer the type of
protection that provides any lasting protection; they are only permited for a
couple of years anyway. Mother
nature has been able to pretty well take care of it in less time than that. Mickey
Sugg - So that would be something you would have to look at? Tom
Jarrett – Soon as we look at it, we can make various ranges of, if this thing
continues for another ten years, without reversing, what would be the economic
impact? What would be the
environmental impact? You are
loosing habitat, and it’s being replaced by sandbags and I don’t know if
sandbags are a good habitat but they sure don’t look good. Tom
Jarrett – I think the CSE proposal did consider placing a minimum amount of
material in here but it was like 100,000 cubic yards, if I recall, my guess is
that that wouldn’t be worth spending the money to place it there.
I would rather have all that sand and place it on the beach.
Let the channel do the work. John
Kilgore, Pointe resident - I think several years ago there was 50,000
cubic yards placed right there and it lasted, what, three weeks, a month. Tom
Jarrett – Yeah. The material came from the waterway and pipe was laid along
this section of the shoreline and placed there. Of course it was very fine-grained material, a lot finer
grained that what you will find out here but even then it washed away.
I guess you go back and look at the experience that ATM had during their
initial attempt to close the abandoned Mason Inlet Channel when they reopened
the new Mason Inlet, and came back one day and tried to just pump sand into the
old channel they weren’t very successful on that first attempt.
What they actually had to do was stockpile material, move into a
position, and once they had slack water, then work feverishly to fill in that
hole. This channel is much too big
for that when compared to Mason Inlet. Mason Inlet is not as wide so you are
talking major volumes of sand and you just can’t pump it in there quick enough
to close it off. You could possibly
go in there with some type of temporary sheetmetal wall that I think was
proposed for Mason Inlet, which could then maybe seal off that flow long enough
to go in and put the plug in there and then remove it.
We could certainly look at that alternative, but my guess would be that
it would exceed the budget constraints of the Town of Emerald Isle currently
has. Mickey
Sugg - CSE, the vibracore samples, you said they did ten?
How did they come out? Tom
Jarrett – I haven’t seen the results of all of them, in fact I haven’t
seen the results of any of them. You
can question that information from them. There
was some minimal amount of information provided on these core locations, i.e.
Core C06, NA, that, this is right out of the report and that means “Not
Analyzed” at this point in time. This particular core had a mean grain size of
.56mm that is a lot courser than what you see on the ocean beach, I don’t know
whether that’s shell or what that was. This sample here was about .3mm, that pretty much a typical
mean grain size that one might find on the coast of North Carolina shores. You
find a lot courser material up in the Dare County area, particularly Kill Devil
Hill, Nags Head, Kitty Hawk. For
the most part, .25mm or .2 mm is a pretty decent average mean grain size one
might find on the ocean beach around southeastern North Carolina.
This particular core had a .4, this about a .27, this about a .2, so
it’s kind of interesting that some of the finer grade material was found on
the off-shore portion of the ebb tide delta.
Again, with the additional jet probes, with the additional virbacores and
the ones that we plan to take I’m sure that we will find that this material,
when it’s all mixed together, compared to characteristics of the material
that’s on a native beach, you won’t find where your sand ended up. A
comment was made, that an island shown in the presentation, is a state owned
island and managed by North Carolina Wildlife Resources Commission, there is
bird nesting out there and we would like to make sure that your future cut does
not go through there or get so close that it’s start eroding away, or
sloughing back into the new channel. Tom
Jarrett – O.K. Yeah, it looks
like the natural bowel leg or deepwater portion of the channel kind of comes, of
course it swings this way and we were looking at perhaps coming around that and
coming off through here and not in this area, but that’s good to know. Another
question asked was about the environmental impact statement done, was that under
the National Environmental Policy Act or the State Environmental Policy Act and
has the decision been made that it would be appropriate to do a supplement or do
a new one? Tom
Jarrett – Guess that’s what we’re here to find out. It
is known that Coastal Management and the Corps have spoken about that particular
process. When the process gets
going it is thought it will be a
NEPA process, than it will under the National Environmental Policy Act. Mr.
Keith Harris said it will be a NEPA document of some sort.
We need to go through this process to determine all of the issues and
then CAMA and I will sit down and discuss and provide feedback to the applicants
on the best documents. The
State has been contacted about what the State role would be and once the Corps
reviews it, similar to the consistency program and once it goes through the
State steering house that would be when it would be considered complete enough
for an application to come forward from the CAMA. If the legal process is gone through and it gets circulated
under that consistency then we would circulate it in the steering house that
way. The
recommendation again is to look at the Department’s policy as far as what
triggers new SEPA documents, environmental documents. The mining of materials and or the location of the new
navigational channel and we’re, probably this will be a new navigational
channel compared to what they now, so we are making the determination at our
level that it would be a new SEPA document or new environmental document. Tom
Jarrett - I guess the indication of a supplement was really aimed at the beach
disposal part of it and the supplemental piece of that would be the
compatibility of the inlet material versus, native sand, versus the
compatibility of the existing barrow area and that would be the primary focus.
As Cheryl Miller pointed out we have major, our area of major concern, is
that we be evaluating material. And
one thing here too, again, the previous project was just for the excavation
material off shore and the beach nourishment project. Now we are bringing in another component of the navigable
channel issue and that just opens up a whole new can of worms that is going to
need to be addressed in a new document. A
new document is needed but that’s not to say that we wouldn’t want to
incorporate and use all previous data that’s available. Gregory
Rudolph asked about looking at the Town schedule, you talk about doing this
document or supplemental, whatever, and making some sort of conclusion by the
fall, before you activate a contract for the rest of it. Tom
Jarrett - The deal would be that,
whenever the inlet permit goes through, and whatever shoreline is covered by the
inlet material then, what isn’t covered would be covered by the off shore
areas. If the inlet project goes
belly-up without being able to get the permitting then the Town will use its
fall back position to use approved off shore borrow areas to complete the beach
nourishment project. Its
still going to have to be decided but it’s probably going to be EIS. There are
a fair amount of issues in beach placement, in and of itself, and then you add
complexity of adding an additional channel, basically that’s what you’re
talking about, through the throat of an inlet which, you know, will change the
estuary and probably change the ocean. So
those are two new questions. During
our discussion, a question that came into play, was with the Mason Inlet
location that was an EA but it was a substantial EA with additional support. The
Mason Inlet EA had so much additional support, that it was comparable to an EIS. Mayor
Schools – We’ve pretty much been planning in the
EIS direction. Cheryl
Miller – I think it would be a time saving. An
EA for Mason Inlet was not approved. And
not to say that it can’t be mitigated. There is information on the beaches but not on the shores or
bird habitat and if Bogue Inlet is a crab sanctuary it is not mentioned. Cheryl
Miller – With a need for documentation, any document can serve as initiation
of that process as long as you state that up front. Yeah,
that’s true. Cheryl
Miller – You could of course do that rather than preparing a separate EFH
assessment. Tom
Jarrett – The first reading, the schedule we are trying to adhere to (?), in
order to get into a position of, (?) position, we would pretty much like to have
those documents complete by November. Is
there any other source of information that could be called upon ? Tom
Jarrett – Sort of continue the sample during the period in which the documents
(?) Cheryl
- Right. You don’t need to have it all up front as long as it’s before
construction starts. Cheryl
- We would echo that. The 1998 imagery that I have quantified the habitat and it
looks like Bogue Inlet is one of the top three inlets for bird habitat in the
State. Tom
Jarrett – My guess would be that the size of those shoals probably fluctuates
on a fairly dynamic equilibrium
which is kind of a strange hybrid but anyway certain surface area will fall in
the ebb tide delta. The ebb tide
delta may change shape from the norm but if you look at the surface area it
pretty much stays, within certain limits.. Tom
Jarrett – It was done, and one that was high on our list to try and we did the
we could. Tom
Jarrett – Thanks to Cheryl. She
got on the phone and called everybody in the world to find out what is going on.
So it wasn’t like this just fell out of the sky, we have done some
preliminary coordination to try and get to the point of at least making a
presentation that covered most of the concerns, at least that we have
identified. I think the State Essential Fish Habitat issues and the Fish
Management Programs are maybe some that we need to focus in on within these
particular species will certainly be added to the list of things to look for and
as far as the sampler probe goes, I’ll have to get with Cheryl and see exactly
what will be involved in that but we are allowed to continue to sample
even during the coordination process of the documents and I’m sure we
can probably whip that out. Thequestion
was asked, if land accrues on the point area, who’s land is that? Tom
Jarrett – I guess if it’s deemed to be a natural, and I think in this case
someone could argue but generally speaking, from my experience, the state law
is, if you go out and you nourish your beach and raise it above mean high
water and you use public monies to do that that newly created land
becomes the property of the State. In
this case, if you move the channel and you don’t really do anything to
physically raise or create land on the point, it just builds up as a result of
the channel being moved, then I think it would vary in ownership. Cheryl
-If they pay taxes on the property then they can. Tom
Jarrett - It depends on how that lot is defined. If you have a lot that’s
platted and it’s got boundaries that goes from point A to point B to point C
to D, and someone maybe has retained ownership and has continued to pay their
taxes, then I think they can actually claim ownership to it.
If your lot though is only deeded to mean high water then it comes and
goes with high water . Cheryl
-I think it’s something that should be looked into, is that, if, you know, I
mean I know you’re not going to put any chain there or whatever, but it’s
going to have a natural ecretion and the thing is that I think we should look
into either acquiring, if it’s still being paid, acquiring ownership of it or
whatever to, because it’s all going to be a part of - - -. Tom
Jarrett – Are they in this area? Jeff,
what happens with the first line of stable vegetation we’re not re-nourishing? Commissioner
Farmer asked,With the sandbags that are there now, am I right that those have to
be removed? Tom
Jarrett – Is that being actively pursued? Yes. Tom
Jarrett – Well, actually, all of Bogue Banks is actively pursuing it. Cheryl
- Once you get into the environmental impact
and as you know with Mason Inlet there are things that you need thrown in
that are not necessarily addressed in the rules. It wouldn’t surprise me a whole lot to see that become a
condition of an inlet relocation. When
you’ve got other things thrown in I
think at Shell Island they can’t have _____ any more, that’s really not
something in somebody’s rules, it became a bargaining tool more or less so
there is nothing to say that this would follow a traditional one, two, three
step. Where
does the County line run through here Frank? Frank
Rush - I don’t know exactly where the County line is. He says it’s right about straight down the inlet.
The
old inlet or the existing one? Bear
Island. Tom
Jarrett - Bogue Inlet has pretty
much been confined between these limits. Actually
you go back to 1938 shoreline, where the inlet was in 1938, came out this way.
This spit built up from 1938 to the early 1950’s or so and pretty much
stayed the same since then. I
imagine when the old map makers were making maps they picked Rich Inlet.
They drew a line through Rich Inlet to separate Pender and New Hanover,
and no one really knows exactly where that line is. I imagine the same thing exists here, they just kind of drew
a line. Whether there’s ever been
an actual survey, I don’t know. Tommy,
if I may go ahead and try to address Emily’s question as far as how long
sandbags can remain and when they have to be removed.
It does say that a temporary sandbag or other control structure may
remain in place for up to five years in case of a road and up to two years for
small structures or until May, 2008 whichever is later regardless of the size of
the structure if the Community in which it is located is actively pursuing a
beach nourishment project as of October 1, 2001. For purposes of this rule a community is considered to be
actively pursuing a beach nourishment project if; 1) it has been issued a CAMA
permit, where necessary, approving such project.
That wouldn’t be the case for the inlet here. I think it’s pretty straightforward; 2) An ongoing
feasibility study by the U.S. Army Corps of Engineers and a commitment of local
money when necessary. That’s the
one we are going to have to look and see if we can get a clarification from the
Corps on; 3) Receive a favorable economic evaluation report when a Federal
project approved prior to 1986. I
think #2 is the one we are looking for some feedback as to the timetable when
they actually have to be removed. We
are actually in that process right now. Now
that’s a tough question, a tough determination to make. That’s
why you get the big bucks. The
Board had discussed the issue of whether we try for an EA or EIS, the Emerald
Isle Board. Our concern was that if
we go for an EA we may in fact be wasting time and that we would prefer to go
for an EIS. I don’t know whether
that’s a call we can make but really what we were looking for was an expedited
process with an EIS. Tom
Jarrett – We had pretty much based our proposal to the Town on the EIS. What
impact to navigation is this project going to have? Tom
Jarrett – The Town has already written a letter to the Corps about that and I
guess about the only impact that the Corps, the Corps’ response basically is
that they are authorized to maintain the channel through Bogue Inlet through the
deepest natural whatever channel. Tom
Jarrett – During the project? Probably
wouldn’t be really any impact because the changes that will occur in the
existing bar channel won’t be instantaneous.
The new channel, as we envision it, will be cut from the ocean toward the
bay, and it wouldn’t really start to capture any flow until that final breach
was made in the last portion of the new cut and once that occurs then it would
probably be a navigable channel almost instantaneously.
The Corps has requested Coast Guard reposition the channel markers to the
new channel, of course that can take three or four months. Will
the pipeline be laid within the natural channel out there now? Tom
Jarrett – It will be submerged. Tom
Jarrett – Yes, but it would probably be laid across the deepest part of the
channel and it’s 18-20 feet deep there, the pipeline will be three feet in
diameter. Do
you envision the side cast dredger working simultaneously with the (?) Tom
Jarrett – We have included, at some cost a long navigational history. Afraid
so. Frank
Rush – It is being funded by the Town of Emerald Isle I
didn’t know if any funds were provided by the County. When
do you need them? Tom
Jarrett – How about 15 June or 30 June? Tape
2 Side B Tom
Jarrett – Thank you. Tom
Jarrett – Do we have anybody else? Tom
Jarrett – That’s correct. Yeah,
If we determine that anEIS is to be done. Tom
Jarrett – Any other comments? Tom
Jarrett – Do you want to answer that Jeff? Am
I hearing that the road may possibly be protected? Tom
Jarrett – Any other comments? Tom
Jarrett – Yeah, there’s. In
this State, no. I mean the
In
any state? Tom
Jarrett – Rudy, you got comments? What
is the distance between the existing channel and the proposed channel?
How
many additional cores are you planning? Tom
Jarrett – Anywhere from five to ten. Everything
seaward? But
it is also basically formed by flood tides, is that correct? So,
the professor was suggesting that I take the sand from those areas. Any
more comments? I’m
just saying… Tom
Jarrett – We are probably talking nor more than three months. Well,
we have a time (?) just trying to get the general understanding of timetable.. There
being no more discussion, the meeting was adjourned at 3.05 P.M.
NOTE:
The (?) indicates “inaudible” In these Minutes. Respectfully submitted, Carolyn K. Custy
|