Yeah, good morning, everybody were the group from
Tri-Tek Engineering and we designed the Tall Oaks Commercial
Flex Industrial Development. My name is Bill Mackey.
I'm Aaron Bartley. I'm Pat Smith. All right. Just
a quick overview of our presentation real quick. I'm
just going to be going over the initial client goals
and introduction as well as the grading and erosion sediment
control while Aaron will be going over storm network and
that will be going into the water and sanitary as
well as the conclusion. Um So our site location
, I'm just relevant from here. It is in
northern Virginia is located in Loudoun County, so if
everybody knows where they are here, it's about 4.5
hours um northeast of here. So I'm sure a
lot of you guys are from northern Virginia and it's
located just outside of Washington D. C. To
the west between Reston and Leesburg right there. Um
it's just outside the 495 felt, but Um so
here's our existing conditions site um it's about 10 acres
and it's completely um wooded and it's undeveloped. Currently
it is in a pretty or pretty commercial district as
you can see by the by the two parking lots
and large buildings and it's located or its zone for
a planned development industrial park. So as we're gonna
be developing an industrial facility, we didn't need to
change is the winning at all. Um There's no
existing utilities on site and it's actually currently a gravel
road that's the only access to the site that runs
along the north right there and it's an extension of
Murray's Word which is paved and the site is very
flat actually with 0 to 5% slopes and there's wetlands
at the north of the site right there, it's
about a third of an acre and we're actually going
to remove those wetlands. Um so client goals um
the improvement of Marie's road was a big thing on
the end of the paved road is significantly north of
the side, about 500 ft, and we have
to actually pave the road all the way down to
the bottom to the south of our site. And
um as well is designed to flex industrial facility,
which if you're not familiar with what that is,
it's basically a large 50-75,000 square foot building and it's
mostly a large warehouse and it has 25-35 office space
with parking and it has loading Bay is located along
the back. Um This building is roughly 100 by
500 ft, so it's very long and rectangular to
allow extra loading areas and the pavement elevation is actually
four ft below the finished floor elevation, which was
significant in our grading. So here's our site plan
overview. This is actually our conceptual layout from the
beginning, we, as we had to design for
two buildings. The building to the east is the
building that is proposed and that actually actually will be
constructed. While the building to the west is just
a future development which we only designed for in our
conceptual plan, Um this is our actual site.
Um this entire area is just gonna be grass area
for the future building. While this will be our
proposed building that will be constructed, it's about 52,000
square feet. Um You can see here traffic will
be coming from the north and wood and car traffic
will just be coming into the parking area where the
front of the building will be located while um truck
traffic will be able to come into our site access
or access road into the loading base and you can
see the water and sanitary lines which run through the
site and then on the stormwater management, on down
at the bottom, We have about 169 spaces shown
on our Um concept for our layout right now,
and there's only 131 required parking spaces. Um so
grading, our grading was relatively easy with just um
maximum five slips, but we actually had 8000 cubic
yards difference and fill, which is rather significant.
And we understood that if we just lowered the building
pad by about one ft than everything would be um
balanced out from that. And just from the roads
, as you can see, Um it's just one
longitudinal slopes with typical cross sections. Um So the
roads were relatively easy to develop original sediment control.
We have uh to settlement basins on site, one
at the top and one at the bottom, and
these are separated into two drainage areas. Look at
just as you can see from this large drainage divide
across the middle. Um We have diversion dykes to
assist in those um and draining into the sediment basin
as you can see, and then still fence along
the outside to keep all settlement onto the site as
well as a construction entrance. Um temporary seating as
you can see is only place right here as that
will be where the future building is going to be
, as well as the stockpile area with a silk
thin surrounding it um are face to measures include um
dominantly uh protection as we have a rather large amount
of inlets along Murray's road as long as as well
as around the parking areas. So those will need
to be protected to protect the storm water system.
And then permanent seating as you can see, will
be placed in the large grass area where the future
building will be placed as there won't be any construction
there after the initial grading of the site. And
also um the phase one uh Original settlement control sediment
basin is the same as our storm water managers upon
, which will just dredge out and convert into a
permanent stormwater management facility. I'll let Aaron, thanks
. But I'm going to cover the storm network and
touch upon. Uh Start with the pre and post
development donations. The redevelopment donations contain three watersheds.
Uh The watersheds roughly divide the site from north and
south. So we tried to uh all that with
our grading as you can see here in the blood
picture. Uh Those delineations are post development delineations and
we try to get those to flow down to our
new detention pond at the bottom there. And then
on the bottom right here is our Marie's road.
Um Uh delineations, they will flow into the Marie's
road network. And we were we produced over 500
difference and run off between our post and pre development
. So I'll talk about the storm network. Start
with the inlets. We have four main systems uh
Start with Marie's road. The top right, We
have great and let's collect all the water from the
north of that. And then uh down here at
the bottom bottom left, we have to sack curb
and let's uh collect the all the water at that
point there. As you can see right here.
And that's the plan. Do you have memories right
there. Next system is the access road which we
have split into two separate sides with a high point
in the middle of the road. The top of
the road will flow into the marine road network up
here into the sunlight and flow and to the marines
road. And then the bottom will flow down into
our southern parking lot, meeting to these two and
lets it flow into our detention. On the next
is our loading bay area. We have two great
templates that are placed within the loading beds, will
take about half the runoff from the building, the
loading bay and the grass area to the left of
their. And then we also have the eastern parking
area, which will we have to end, Let's
locate there at two low points. They will flow
to this these two down here at the southern parking
lot again and they will collect at the uh detention
bond. And this is the nine and 10 inlets
again on the left side of the southern parking the
horizontal pipe layouts. We got the uh touch upon
pipe layouts right here, You got the nine and
10 down here again, the wedding day in the
middle and then the parking area there on the right
and then the Marie's right again showing the sad curve
and then they great inlets up top and for pipe
sizing. We went with 15 pipes for all our
pipes. We used the rational method. The terminus
only exception was the 12 pipe here between nine and
10. We had to do that. We have
to have that and live there for um prevent ponding
at that island. So the next thing I'll talk
about the vertical alignments. Pretty much everything was normal
except about one constraint with our loading base because they
were so low compared to the parking area to the
right, the flooding. We had to drop the
pipe network down to the detention pond Because in the
bottom of the elevation of 2 98, 298 ft
compared to the starting point at three or six.
And retention pond you can see in the profile,
lower jumps up and goes back down. Um So
our detention pond, it was determined to be 18,000
cubic feet. You can see the plan view here
. We got the three and let's come in and
then that's gonna be our allies coming out. You
can see this outlet flowing out here. We decided
to go with a dry pond and we were able
to meet the post development close to meet pre development
flow. We're only constrained by east. It is
only a 10 ft easement, so the maximum pipe
diameter that we could use with 18". So,
but we were still able to meet that using the
18 outlet pipe. So next we'll move on to
paddle. What are you doing next along here?
Uh Like both said before, I'm going to cover
wet utilities very briefly and the cost estimate and try
to wrap everything else as fast as I can to
start off to review the client goals. Um They
need the water lines loot from the northeast, right
of way of mary's road, all the way down
to the southwest of the lot west of ours,
sanitary line to connect from the building down to the
same area in the southwest. The owner of the
Jason properties allowed us to throw in Eastman in their
our design approach pretty much followed the procedure of the
land water engineering design Manual and all the other Live
in counties only requirements, facility standards manual. Um
Our plan view basically, we started off at the
top building connection at the northern face of the building
. We ran down the center of the loading dock
. So we didn't Interfere with the future building is
gonna be on the west side of the loading dock
. We hunt the southern border, so we didn't
interfere with any future development and lot six fire hydrant
phone. We were able to fill latin counties requirements
for that, which is to hydrants Profile View.
We kept between three and 6 ft of cover pipe
sizing the follow the same procedure that was in the
engineering design manual size or pipes Using Bernoulli's equation realized
that eight inch ductile iron pipe was best for the
water sanitary sewer, pretty much ran parallel to the
water line. 12 ft separation kept over six ft
of cover and minimize the pipe, slopes. Pipe
sizing was done using the engineering design manual stated before
. H. P. V. C. Pipe
was selected using manning's equation, Cost analysis. Total
cost was just over$2 million. And just to
recap we followed all the clients procedures. We not
only did that, we did so with the county
requirements and we think that we did an efficient and
economically feasible design. We'd like to thank you all
for your time and mentors, kevin, john and
brian for all their help. Does anyone have any
questions? Why don't you guys have to remove the
weapons? Um well we actually in our value engineering
when we designed for the second building, we removed
them because if they were to develop the second building
then they would have to because the buildings themselves take
about 25 of the site. But in our value
engineering we said if you were to like if the
client were to decide not to build the second building
, then it would actually save Like roughly 70 of
wetlands, which saves costs about$30,000. So we
put that in the value engineering and um in the
end to save some money if they want to have
that option. any questions. Yeah, I think
that at all. Thank you. Thank you.
Yeah. Alright. That concludes our final presentations and
I'd like to uh just offer a couple of comments
uh from my perspective, I'm extremely proud of the
students in my class. Um The presentations this morning
, we're very professional, very well done, very
practiced and quality of engineering done shown throughout the last
four months. It's very good. You guys,
we can tell you put a lot of hours in
my right, is that is that an understatement?
Uh I think the mentors no as well. Um
but what I'd like to have you guys do is
thank the mentors for all of your help. Could
you help me? They volunteer their time and their
expertise and uh probably put up with some exasperation on
your part during the semester at certain times and handle
it quite well, I'm sure, mm you know
it's tough, it's a learning process that some of
them have gone through in this class and they know
what it's like. So those folks that didn't go
through the class um learned it somewhere else and I'm
sure found it just as frustrating and it's it's not
easy what you've just gone through but it certainly will
help you in your future career.