Yes, okay, we're gonna get started here and
as I mentioned, we're being recorded and Therese Walters
is here and all set up and so please be
careful of the cords as far as your movement.
I think we've got two cameras going. The screen
looks like it's high enough. You won't be impeding
view, but I guess trying to stay out of
the center of that as far as your microphone,
we've got a senator mike that's kind of fanning out
. So I think you'll be good with your sound
. Um I've got a clicker working so everybody's I
think used this before on the first presentation right forward
backwards. There's a blackout. Don't hit it if
you do hit it again. Um And there is
a little pointer here if you want to make uh
NFS point on it so that's running um everybody's power
point is up and running so you just have to
find it. You don't have to double click it
and get it running again except The Sexy one wherever
you guys say you have to do that. All
right. Um as far as Timing, I'm going
to start my stopwatch and I will stand at nine
minutes. You have 10 minutes to do it.
If you're almost done in 10 minutes, I'll be
a lenient. Right? But we don't want you
droning on and on into 15 minutes, that's not
gonna happen. All of all of the mentors have
sheets that they're gonna be taking notes on about different
things. You guys have all done presentations multiple times
in the past for some of you. This is
the last final of your college career, am I
right? So this should be the very best presentation
of your college career. I'm looking forward to seeing
that. No pressure, no pressure, but that's
what we're looking forward to. Are you guys need
to go? Yeah. All right, let me
sit down and get my that's why the land.
Mhm, mm hmm. Yeah, yeah, I'm
Greg. And we're working on burgess tonight bro.
I'm doug steve for martina. So we were working
on a site looking at 43 50 Pleasant Valley Road
in Fairfax County. You can see it's located up
near D. C. In the northern part of
Virginia. It's separated by the Loudon County and Fairfax
County uh County line. And we focused on not
developing in that Loudon County site to make sure that
we didn't cross over any regulations between the counties or
zoning ordinances. Um Down here, this is the
com plan land use map. We focused on making
sure that we stuck with the com plant and made
sure that we were meeting the regulations and and things
they focused on. The com plan the zoning ordinance
. The site actually to be rezoned and had to
receive a special use permit. It was zoned residential
conservation, which in Fairfax County, they looked to
preserve the ecology and it's roughly 5 to 10 acre
lots. Um there's a special use permit was given
because we're developing a church and it's a roughly 33,000
square feet and that falls under the special use permit
as a place of worship is also is going to
have a nursery and a future development of a playground
. Um We did our feasibility analysis. We used
our wetlands delineation. Uh There are no little wetlands
located on site. We also used our web soil
survey. There are no protected farmland soils also located
on site, But we do have 100 year floodplain
on site, which we had to make sure that
we kept undeveloped to ensure the safety of the development
and the preservation of the ecology. Um The existing
site conditions, we do have existing water across the
street sewer across the street and there is a connection
to the public storm water down at the um northeast
corner. There we also have an environmental quality corridor
that is to remain perpetually undisturbed. However, you
can put passive BMPs as well as unpaved trails and
stuff through the pc. We also have a resource
protection area which in this location is to preserve its
in the Okay Kwan um reservoir watershed so as to
preserve the water quality and storm water runoff. So
we start with our grading. Um We had to
focus on the parking lot as that was going to
be our biggest part of the development. The site
is located on a ridge. So we focused on
placing the parking lot in the areas of low slopes
to ensure that it would be less earthwork, as
well as focusing on using that that ridge to maintain
our runoff for storm water and to ensure that we
were going to minimize the cost for earthquake. Since
that is roughly one third of our coast. The
building plot was set at 268 ft. We figured
that 268 ft for our building elevation would best meet
our storm water runoff and grading plan to minimize cost
for the parking lot. Um we also have our
step off one ft for the 1st 10 ft to
ensure that no water is going to be running towards
the building. R. A. D. A
. Access is located right here and it goes to
the west entrance of the building. It is met
all A. D. A. Requirements and regulations
as an introvert foot. And it consists of 6
80 accessible parking spots, as well as one van
accessible parking spot. And we're using a retention pond
site for storm water. And just moving that up
to, we had, we initially had it lower
than that. Once we moved it up to 264
, we actually reduced our grading costs$500,000. So
it was pretty interesting to see how such a small
thing can save your cost. Mhm. All right
, so I'm here to talk to you about the
way utilities on site as Greg was talking about,
there was a water main connection through a two inch
fabricated right across the blue blue spring road That was
connected and run with a six duct on iron pipe
all the way to the building. One of the
fire code regulations is that a fire hydrant be within
50 ft of the building. So we place that
right across our egress access or egress access way And
that consisted of the fire hydrant itself and a six
valve right before we got to the building. As
you can see, there's a three inch valve and
at 1.5 inch water meter before the water is actually
fed into the building. Now another fire regulation was
that you need a fire line also going in a
separate way. So we have that coming off right
there. As you can see from the picture.
The connection was actually made at 250 253 ft in
elevation At that point and made the connection with the
building at 259. Now the other way utility is
sanitary sewer. This was a little more complicated than
the simple lateral line that was connected with water.
It was an eight PVC And as you can see
, we connected at 252. This manhole that connected
in with city water or the city sewage. And
we had the case that with a 24 in corrugated
metal pipe and that was in order to to to
provide structural stability as across the um right away right
here with the increased pressure of the road and vehicles
or particular traffic. Once we got out, there
was a clean out placed every 50 ft as per
regulation, it crossed the storm water stormwater pipe right
here and all clearances of code, all clearances and
covers were to code and it ties into the building
right in the very back. Um and as I
said again, these are clean outs, not manholes
every 50 ft that had, we weren't allowed to
put one in the access way. So uh the
50 ft regulation I was talking about was just for
the first, the first kind of stretch of the
pipe. Next, I'm gonna talk to you about
the storm water management system we put in place,
which comprised of two main two main pipelines, one
running both running from west to east, one on
the northern border of the site. The other on
the southern border consisted of 15 reinforced concrete pipes,
inlets, grates on the two greats located here on
the ground for the two islands and a retention pond
that Greg was talking to you about to be.
And as you can see the two outlets empty into
the retention pond, an elevation of 254 ft.
And as because it is a retention pond, we
wanted to keep A few feet of water in there
at all times. So the outlet structure of the
drainage structure right here, which leads to the 36
reinforced concrete pipe that leads to the sewer or to
the cities Storm Water Management System is located 254 ft
above elevation, so that's going to keep a little
bit of water and there for us. Other than
that, you can see it's not the most complex
system, but it provides the means to keep the
peak discharge of our site adequate with the pre development
number. So it was it was a success um
for erosion and sediment control. We deployed basic methods
including temporary stones and entrance silk fence diversion dykes,
sediment basin, as well as a retention pond um
for the flow path, as you can see right
here directs this way, and we have constructed a
diversion dyke right here, which is called a right
of way diversion dyke composed mainly of soil, but
where it crosses our construction entrance right here, it's
going to be made of stone and we're going to
have an entrance right here. That's also going to
be made of stone for easier crossing. As you
can see, we have a diversion dyke down here
to the south. Both are intended to route water
over here to our sediment basement sediment basin was chosen
over sediment trap because of the increased area over here
, this is a large construction area and the sediment
basin would be able to handle more water than a
sediment trap would um Some of the methods used for
the erosion smith sediment control phase two for inlet structures
we have right here, we're going to be our
drop for our curb inlets structures were going to be
using wire mesh and stone and then for our yard
drain inlets. We're going to be using a fabric
drop. Um Over here, you can see,
we've converted to our retention pond, which has outlet
structure protection, which is composed of rib rep,
which will help reduce the velocity of the water going
into the pond. Um We have standard seating right
here and that will also be right here in between
the building and the parking lot, as well as
the parking lot and the diversion dyke. Um for
the cost estimate, we estimated it to be about
$1.8 million. Mhm. We uh we also came
up with some cost productions earthwork. We realized we
could reduce it$100,000. We could do this simply
by reducing the earthwork by one ft by half a
foot. We came up with the second method,
which would be removal of the islands, which would
save about$10,000. Um We believe that this is
uh an aesthetically pleasing and optimized plan and that concludes
our presentation question. Okay. And take it easy
on the layout of the parking field. Yes.
What's going on in the middle? Is that the
islands? Uh They wanted to focus a lot on
storm water quality and reduce runoff. So we decided
to put vegetated islands to provide an aesthetically pleasing area
as well as reduce some of the impervious area within
the parking lot. Thank you guys, Hola.
We're rolling out. There were no. All right
. Let's make sure. Alright, we're good and
see. All right. Fantastic. All right.
Thank you for being here. All the mentors for
being here. I'm bobby. I'm Alex Teresa and
our mentors are Caleb first and Dave parker over there
. If you guys could wave your hands. Thank
you very much. All right. So I just
want to talk about a little bit of site overview
right now. Uh so we're located in Chesapeake Virginia
and site soils are pretty poor. Also, the
site slopes are less than two on most of the
site. Uh the address is located right off of
George Washington Highway. And uh and the site acreage
is about 17 acres. There were no wetlands on
site and we're not 100 year flood zone. So
we didn't really have to worry about any uh,
anything along those lines. Also, no trees or
brush on sites are clear. Right, okay.
So site sketch of this. This is what the
site could possibly look like. As you can see
. There's a lot of men in these on site
. Uh There's an access road from George Washington highway
into a loop in parking structure on site. As
you can see, there's a gym, community center
, pool, uh community garden playground, uh basketball
courts, tennis courts, skate park, and even
in a Tv course on site. So there's a
lot of features also around the site. There's a
, there's a walking trail and this is about a
half mile on site, and then it goes into
another half mile trail on the south of the site
that's already developed. So here's the center of the
site. There's also a pavilion which can be used
for many activities, such as bands coming in and
maybe just a good place to hang out. So
on to the east of sight, as you can
see, there's a skate park, basketball courts,
and tennis courts. And I'd like to point out
the sanitary sewer pump station, which, which we
have to put in because of how flat the site
was. The reason why we chose this location is
to minimize uh minimize the appearance. Uh You know
, I guess uh really really not not show the
location to the users of the site. Also to
north, there's an access point from the walking trail
to the northern uh the Northern community and then on
the on the west of the site, as you
can see community gardens, playground. Really just fun
for the whole family. Mhm. So also want
to talk about uh some of the requirements from Uh
from the city of Chesapeake. They wanted a sustainable
stormwater design where possible. And also bmp ponds should
take up 12 of the area. Uh As mentioned
before, there's great walk ability in circulation on site
, and and it's really just a nice side design
. Okay. Uh well, the site is owned
a one for agriculture and conservation. Uh there's some
regulations that go with that. There are parking regulations
as far as number of parking spaces for both the
indoor and outdoor facilities, as well as uh 88
regulations. There's also a minimum Lot frontage of 120
ft, a minimum width of 150 ft in a
minimum area of an acre. And uh the site
covered all those criteria. We also placed 30 ft
setbacks Bob For each building, and uh less than
35 of the site is covered by structures. Uh
So there are some of the water and sewer connections
to the east side of the site. Um See
so uh Of the 16.8 acres of land, 5.5
of those acres are green area, and 11.3 acres
are developed in some way, whether it's the roadway
, the facilities or the stormwater ponds. Uh The
design speed of the parking area is 10 miles an
hour based on traffic analysis. Uh, There are
also stop signs placed at each of the intersections and
all the 88 regulations were met as far as number
of parking spaces As well as the slope of parking
spaces being less than 2%. All right, thank
you Teresa. So moving on to the grading plan
, this was definitely the most challenging part of this
. Uh, this development as it was a very
flat site. So we had a lot of interest
iterations and we ended up at this final grading plan
essentially. Um, our goal with this was to
minimize the amount of cut because we knew that if
we didn't do it right, we could have gone
overboard with the amount of cut that we would have
just to drain the site. So we haven't broken
up into four quadrants. You can see for the
, uh for the square part of the site.
Right here we have four. These blue circles here
are low points, not these aren't just the only
inlets but these are the main. And let's um
the red lines depict high lines across the site.
So you can think of water flowing perpendicular to all
of those lines. Yeah. Um And in this
way we were able to segment it up where we
didn't have to have water flowing across the entire site
to be to be picked up by in let's um
And as you can see, we were successful in
reducing our net difference to about 2700 cubic yards of
cut. And all of that cut will be used
in the A. T. V. Course,
which will be graded by an A. T.
V. Specialist, I would assume. All right
, moving on to stormwater management. Um As far
as the in let's go, we had normal kurban
, let's drop in let's and filtering and let's which
were used to fulfill some of the sustainable stormwater um
policies that the city Chesapeake wanted. Yeah, on
the right here, you can see just a general
layout for these inlets in order to make sure all
the water gets treated before it goes into the storm
system. Additionally, as mentioned before, we have
got three ponds smaller. They're more aesthetically pleasing that
way. We wanted to break up our stormwater management
facilities on site. Additionally, we have grass whales
in the center of the site where filtering units were
not an option in order to maintain some level of
treatment of stormwater as well as groundwater infiltration. As
far as the calculation goes, technically, we use
the rational method to determine our runoff values. Um
and hydrographic overlays of our pre and post development hydro
graphs to determine the minimum volumes for all of the
for all of the ponds. Um As far as
utility crossings goes, it could have been kind of
a mess. We were able to minimize our crossings
to one sanitary sewer and water line crossing and one
water line and storm water crossing. You can see
the crossing locations here. The storm water pipe goes
right about up and down through here. Um And
we were able to maintain all of the depth of
the amount of uh leeway between you on the cover
between the pipes. Thank you Alex. All right
, moving on, sanitary Stewart. Uh Our sanitary
sewer pipes were size that eight inches and made of
PVC. Uh The pipe layout is pretty linear to
minimize minimize costs. Uh There was one section required
for force main that's just because of site slopes And
to meet the minimum velocity of two ft per second
. We applied a.39 slope on all pipes.
Peak flow was determined to be 185 gallons per minute
. And this was determined based on fiction accounts of
the community centre, gym and swimming pool. The
PQ should be approximately 200 people. Yeah. So
improving onto water, water lines and fire protection.
Most of of The system was comprised of 10 cast
iron pipe, With the exception of six cast iron
pipe for fire hydrants. Again, the services,
the pool, community center and a gym. So
the total fire flow demand was determined to be 1300
gallons per minute. And uh and the city of
Chesapeake requires 1000 gallons per minute. So we were
far beyond that requirement. Okay, okay, well
, for the phase one of erosion sediment control of
, we uh deals mainly with earthworks, so we
have to stockpiles on site. This is the organic
stockpile and the inorganic stockpiles here to the north of
the site. Uh We place the organic stockpiles of
the west because a lot of that organic soil is
going to be used for the playground and the community
garden, which are to the west of the site
and then the inorganic soil. The extra soil will
be used for the A. T. V.
Course so that soil is placed there to uh not
have to move it quite as much. The run
off of the site goes from northwest to southeast.
So we place these diversion dishes here uh to pull
the water towards the sediment trap which we have here
in the sediment basin which is right down here.
The second phase of erosion sediment control deals a lot
with the storm water. So here is our storm
water pipe network at each of these inlets. We
place inlet protection and uh we also have some temporary
and permanent seating which are sustainable measures in which the
city of Chesapeake wanted. So we have some temporary
seating here to the north, into the east and
then to the south. There's permanent seating. The
total cost of the project is$3.5 million Skate Park
, the tennis courts, basketball courts in the playground
, the swimming pool and the two buildings are separate
from the project, so they were not priced in
the estimate. Thank you very much. Thanks.
Any questions questions we have. Do we have any
questions we covered absolutely everything I'm going to pick on
David. You can't play with that interesting. Okay
. Okay. Alright. That's that's I don't know
the initial scope of the project was so as far
as what the city has been wanted, what your
what your requirements are requirements were to provide the gym
, community center, um swimming pool, tennis courts
, basketball courts and uh the Hey Park we added
in the A. T. V. Course.
That was that was kind of a conditional thing.
The community garden, we thought of that as we
were going along when we realized we were going to
have a lot of excess excess organic soil. The
playground was also required um And because that weren't required
were the community garden and pavilions. Yeah. Tv
course. Right. That was yeah, that was
just based upon the space that we had. So
we we tried to make best use of those as
we could when we were going through. All right
. We actually have yes, we do. We
do have one more slide here, Dave, would
you stand up, please? Uh huh. Um
So last night we went out to dinner, we
had a great conversation, we met these guys families
, their wives, um and we were talking about
cars a little bit. Dave was telling me about
how he had the opportunity recently to drive a Lamborghini
around the track down to Disney World, which is
one of my dream car. So he's talking about
how he's taking this around corners. It's got some
s turns in the middle of the track and I'm
thinking, Man, this guy must still be in
his mid-20s, it's actually his birthday today. So
can we all please give a round of applause to
Dave. Happy 29th birthday. Thank you very much
. It's correct. I'm sure you're gonna get one
of those suits, Yeah, Yeah, Yeah.
All right. Hi, my name's Maya Sheehab from
Jordan. Excellent. And we were tasked with placing
a retail warehouse site on a, on a located
in danville Virginia. We worked with Dewberry with brian
Bradner and marked Albert. So this is just the
general overview. That's gonna kind of help you guys
understand how we came up with our final design for
the project. Our goal was to place a 136,000
square foot retail warehouse onto a uh, 19.12 acre
site. We wanted to make it aesthetically pleasing,
as well as flowing with the traffic that comes off
of a major highway located around it. Uh,
and we also needed to follow ordinances, zoning ordinances
, comprehensive plan, as well as specific things that
the owner required from us. So it's located in
danville Virginia. It's a corner lot that is bordered
by a highway type road Bodman boulevard, but it's
also bordered by Bradner drive um and a row of
houses called along Wolfpack Avenue. It's an undeveloped site
currently, so we don't see any um harm or
we don't have any potential demolitions that we perceive.
But the issue on the site is that there are
extreme slopes that range from very flat, considered to
be 0 to 2% all the way to extremely steep
for greater than 15%. It's located in the HRC
district, also known as the highway retail commercial district
. The purpose of this is to provide businesses and
commercials with land that they can use. However,
it is trying to limit strict development. It's it's
meant for businesses with a less than 60,000 square foot
uh floor area, floor area. However, as
I said, this is 100 and 36,000 square foot
building. So we will require a special use permit
, which we did look up and it says that
um single use or single retails are allowed to have
greater than as long as we do get this special
use permit on the existing conditions. There is One
access point from Barman Boulevard, which is about 36
ft wide. Um The utilities are that are present
are located on the east and west side of the
site. Um shown here, there's a 12 inch
water line, um an eight inch sewer line and
natural gas line that we will connect to know.
Environmental issues are located on site. Um There's no
bodies of water or wetlands. Um These are two
conceptual layouts Lay out. one. The goal was
to provide an aesthetically pleasing design. This was done
by putting the front of the building facing the main
road. Also, the building will be placed on
a local high point. However, this will require
a lot of grading so the goal was to,
was to provide um design that would limit the grading
requirements by having the building on the existing high point
. Um Unfortunately that would make the back of the
building face the main road, which isn't desirable for
businesses. The final lap we went with that one
because of the aesthetically pleasing design. Um there's a
lot of room for the trucks to get to the
docking site, which is right there. There's two
access points into the parking lot for the cars.
There's also ample amounts of parking. There's 553 general
spots, 14 handicap spots and 10 part prowse which
met all requirements. So the grading and for the
site, The building was placed on a local high
point at 534 ft high. However, the overall
high point remain towards the north part of the site
. This was because grading. This section would be
too much money. So we left that like On
the great how it was 88 spots were granted to
two in any direction. Other spots were graded to
a maximum of 5%. Any direction like Brazilian requirements
specified. Um the green space, It was great
3-1 slope or less where it couldn't be met.
We had to replace to retaining walls shown here.
These are towards the bottom of the site or towards
the south end of the site and the West East
End of the site. Um and then The entrance
road was greater than 10 slope, which was the
maximum. But that was just because we had,
we had to ensure that we connected to the elevation
points at bombing boulevard and our slope was a little
higher than we needed it to be. That is
10% slope. Hey detention crime was placed in the
southern corner of the site unless we're used to convey
the storm water into the essential pond and storm water
. Storm water inlets were placed in the areas throughout
the site where the water appears to be collecting at
a certain location. Total of 11 11, unless
were placed on our side and the red lines show
the drainage area of each endless. Using the T
. R. 55 methods, it was determined that
are Our pond side will have to be 24,605 cubic
feet. This was calculated using the hydrographic shown in
the presentation. The dark blue line indicates the water
pipe system used in the project using the drainage area
for each and let we were able to calculate the
flow per area and we used rational methods to calculate
the pipe diameters. It was calculated, calculated that
the pipe Diameters would range from 12 to 30 the
center. The center sewer lines are the green lines
indicated here. The water pipes. I mean the
water pipes are the blue lines. The water pipes
were the sizing of the water pipes were done through
the information given from the building plans and and it
came out to be and there were two location of
the water entry and The domestic water entry required four
pipe diameters and fire lines required tenants diameter. The
fire flow requirement for the building was given to be
2000 gallons per minute. Using this information in the
Virginia statewide Virginia statewide fire prevention code. The minimum
The minimum amount of fire hydrants needed was to,
with a maximum spacing of 450 ft. We've provided
35 hygiene surrounding the building. The two water lines
where Set up parallel to each other and we're set
five ft apart from each other and we're connected at
the, at the vault right there, setting,
setting the, Setting the lines together close to each
other. Made us only dig up one ditch and
connect and installing. Built at the same time where
the water line across the center shoreline, we make
sure that the waterline was at least 18 inches above
the center sewer lines. Yeah, yeah. The
sanitary sewer line is a green light indicating the picture
here. It was determined that the super flow for
for 136,000 square feet building would be 40,800 gallons per
day, Assuming full float value is doubled and came
out to be 81,600 gallons per day. It was
determined that to one sanitary pipe size would be needed
. However, due according to do very standards,
minimum standards, Sewer Piper or six and that's what
we use for our project site. Manholes replaced the
directional changes intersection of two sanitary sewers and When the
pipeline succeeded 400 ft. So for phase one,
we determined that a majority of our problems would come
strictly from pollution. As I said, this was
an undeveloped site. So we placed a silk fence
around a majority of the property. However, not
all of it. As some of it was,
as we said, Hi Points that would not run
off the property. We place the temporary diversion dike
that runs from the northern most of the property to
the sediment basin down here in order to ensure that
anything that was more flowing over towards Bradner Drive could
kind of be re diverted over to the sediment basin
. We put, sorry, replace the construction entrance
at the existing entrance onto the site. We also
place four sediment traps along the southern portion over here
to ensure that anything that was flowing off would be
protected and for inland protection to ensure the existing infrastructure
was protected as well as the sediment basin towards the
bottom. The second phase, we placed 11 added
inlet protection as well as keeping everything other than the
temporary version Dyke. We also added temporary slope drain
, coupled with the outlet protection to ensure that everything
was flowing to the sediment base incorrectly and permanent seating
where the site would be finished grading at that point
is determined that the sediment basin would be dredged and
turn into that sediment pond at the end. This
is the final design. Just to show you guys
that came out to be just under$9.6 million.
Everything. We have a lot of green space landscaping
to keep in with the HRC district codes. I
want to quickly say a big thank you to brian
Bradner and marked Albert for all their help on this
presentation. Any questions? Yes. The far to
the fire hydrants, which prepared to be pretty close
to the building where the police setbacks away from the
building. Pleasant hybrids. Um, we didn't find
any, but I think we were just more going
off the distance and we try to connect them right
with the violence. But uh, we tried it
, we did it based on all the ordinances that
we found for Danville. So we didn't see anything
about a setback marketing. I had actually a question
on the stonework. I don't know where that was
somewhere. But yes, you didn't mention that.
But it was on the any thought given the house
pond is empty more than output from the pond.
Um I think that when we were determining it,
it would never have reached full capacity because we made
it so large. Um did we? I think
we're just going to have on the pond never be
at full flow. It's a way bigger than it
needs to be um in the future. I guess
you could, there is an existing storm water right
next to it that it could be drained into towards
the left of the pond by the access point.
There's like right down here. There was like existing
stormwater like infrastructure that said we could tie into,
I believe. All right. Thank you guys.
Yeah. Yeah. Yes. You ready? All
right? Good morning ladies and gentlemen, I'm Alexis
carrel bat, john Whitlock, I'm Katie gear and
I'm dan brzezinski. And our mentor is Dennis Quinn
. With Christopher consulting's and our developers Madison homes.
I'm gonna start off with the location, the zoning
ordinance and the slope. Our location is in George
mason boulevard and Fairfax Virginia are developing. Goal was
to have single family detached homes. Uh Our site
is located is in Fairfax County which is zoned R
one which allows for one house per acre. This
is not what our developer wanted or what the com
plant wanted. So we re zoned to P.
D. H. A. Which allows for a
maximum eight units per acre. Um This also had
no setbacks and area requirements and minimum minimal sight distance
site, 25 green space was required as well as
a 20 tree canopy. Within the 10 years,
Development of the site would be very easy because our
slope is very uh non existent um and minimize grading
is required. Our current land use right now uh
to the west is green space into the east is
a bus parking lot. Our conceptual design. Our
goal was to get as many plots Um as possible
while mating 25 green streets and having a very pedestrian
friendly environment. Our first conceptual design had 46 lots
and one access point on George Mason Boulevard, which
limits the disturbance of traffic. Um We had to
slow community speech, which makes for a very pedestrian
friendly environment and we had limited off street parking.
Our second conceptual design had 55 plots to access of
two points of access, uh which deserved the traffic
but utilized the space better. Again, we had
slow community speeds and lots of off street parking.
Our next slide, you're gonna see a progression of
what we thought with our project. Yeah. As
you can see in our progression, the conceptual design
stage and our final decision picking. Our first conceptual
design allowed us to have a more green community,
a better flow within the community and less uh impact
to current traffic. I'm gonna pass it to john
he's gonna talk more about the roads. Okay?
As mentioned before, there is one existing road that
runs right through the middle of our site and that's
George mason boulevard. The Fairfax County comprehension plan Desired
one access point. So we honor that in our
design. This is our site if these are one
thing contours. So this barry is very flat and
our proposed roadway is on the right. We have
Harlequin court on the left, with the cold sack
Christopher lane on the right and road street connects George
mason boulevard at one point, um we're use private
roads. Were designed for private roads to have a
little more flexibility in our road design. We maintain
standards for almost all of it, except for really
the 50-foot cold sack, which is a little a
little bit tight and it's a little smaller than what
standardized Are. We calculated our duty to about 400
, which allows for 15 mile per hour design speeds
28 ft right away with 12 ft lanes and two
ft curb and gutter. This is our boat grading
. Um this is what the existing conditions, it's
a little crowded. But I want to show you
that we, the main thing we did was remove
this dry soil at the bottom of our site to
make room for our building pad and for some green
space. What's up close up. But on on
the right here is our is our boat grading and
our main focus was the building pads. And we
held a high point along the middle of the building
pad, about two ft above the proposed roadway to
allow for drainage and slope from either direction, about
21 on this, on towards the road in about
10 to 1 towards the back. And that was
really the main focus of milk, grinning and there
wasn't too much else to it. And the detailed
rating was fine tuning that bulk grating and we held
a constant elevation for the finish floor, still two
ft above the proposed roadway, and then we have
a 5% grade sloping for 10 ft out from the
finished floor, which equates to about half a foot
drop over 10 ft. And lastly, we added
a sway on the back to account for the drainage
because this is a long, hard look in court
. We had a large green space over here and
there will be a lot of stormwater to talk about
. And that's where we'll go next with Katie.
So I'm gonna talk a little bit about the storm
water here. You can see our pre development watershed
, you can see it's mostly in one watershed heading
to this low point down here is marked by the
green X. We use the rational method and we
used three different type of concentration lines also going to
that one point to find that our total pre development
flow rate was 23 cubic feet per second. And
here you can see all of our post development watershed
delineations, all also flowing down to this final point
and our total post development watershed or flow rate was
29 cubic feet per second. Here. You can
see our proposed stormwater lines which are sharing in the
dark color. We decided to tie into existing inlets
on George mason boulevard. There are seven of those
as seen by the darker blue. And we also
chose to install 12 new inlets, which are known
by the lighter blue. Those we placed in low
points or before intersections to prevent too much water from
entering intersections or ponding on the site. In order
to make up for the difference between the pre development
and put post development flow rates, we decided to
install, install a detention pond down here. Um
This would have to be about 0.17 acre feet,
which is about 7500 cubic feet. Um Since there's
an existing Swail in this location, it made sense
to place it here, especially since all the water
was drained from there. So there didn't have to
be a whole lot of drastic grading changes made since
there is also an existing outlet structure there as well
. Also required by Fairfax County are best management practices
. So we looked into what would be our best
options and we ended up settling with dry swells since
they would reduce the amount of water exiting the site
as it flows through. Now, I'm going to
move into a little bit about the erosion sediment control
plants. We decided to line most of the site
with super silt fence, which would prevent water from
our dirt from flowing off of the site as grading
is occurring in stockpiles of soil are building up.
We also put in diversion dykes either to direct water
towards a settlement basin or sediment traps as well as
to keep clean water from coming in off of the
site on the west side. Um we have one
sentiment basin where the uh detention pond and mentioned earlier
would be going and it's also construction entrances to prevent
trucks from tracking dirt on and off the site as
they move as needed, temporary seating will be installed
up until final design, which you can see here
as we put in the inlets that I discussed earlier
, we would add inlet protection and remove the sediment
traps we had on the east side, the sediment
basin and the diversion dykes leading to that sediment basins
as well as the super silt fence around the site
would stay in place until design is complete and then
the sediment basin would be turned into that detention pond
. And now I'm going to pass it over to
dan. I'm gonna talk a little bit about the
wet utilities here. You can see we have both
sewer and water. They're in their own separate lanes
in the roadway so that we can meet the 10-foot
horizontal. An 18 ft or 18 excuse me,
separation requirement. The sanitary line proposed uh, its
own unique problem because our only existing tying is up
in the northwest corner here, which is actually one
of the highest point on the site. We weren't
able to gravity feed all of our sewage to that
point. So we had to do was designed to
bring all the sewage to the low point on our
site and then installed pump station, which will bring
all that sewage back up to the top. The
lines are eight PVC And are designed to hold 68,000
gallons per day. The water system we didn't have
any problems with. There's an existing six inch line
up in the north here and a 12 inch line
down here to the south, Which made it really
easy for us to loop our water lines together,
which is a requirement for Fairfax County. And this
is an eight ductile iron pipe That supports 30,000 gallons
per day for the residents and a 6700 gallons per
minute fire flow requirement. Lastly, is our cost
. The final cost of our project was$1.31 million
. Some of the major cost for this project Where
the storm pipe, especially 24 storm pipe near the
outfall location. Uh huh. The PVC for the
sanitary, the doctor, iron pipe for the water
lines and then obviously roadways and driveways were a huge
cost for a development like this. And does anybody
have any questions? Great. Did you have to
consider any traffic control and crossing the road? Yes
, that's why we decided to go with the first
conceptual design with only one intersection. It was like
just about in between the two existing intersections. And
I actually got a chance to go look at the
site and I lived near there a couple of summers
ago so I knew that it could get a little
crowded, especially um with the traffic in northern Virginia
, but we figured it wouldn't be a problem because
it stayed away from most of the existing turn lanes
. Yeah, no questions asked a lot of.
All right. Thank you. Yeah. Right.
All right. It's a pleasure to welcome you all
to our presentation. My name is moses, I'm
paige, Crawford, brian Graham and we got LMRP
consultants. We will be talking about a project which
we called to help Plaza and we're mentor by uh
All right guys and bought it back there. Yes
. Uh just a brief overview of the present.
I'm sorry the presentation will talk about some of the
layout characteristics and uh design and then we'll open the
floor for questions if you guys have any. Our
site is located, it will first off will be
a commercial development. Um it will consist of seven
buildings uh re sole source and then one of them
will be a restaurant and the other one will be
a grocery store. It is located in Lynchburg Virginia
about 100 miles away from here is not too far
. Uh It's total area, it's about six point
point 6.4 acres and with it has about 250 ft
of frontage, It is only be five so that
that was perfect for our development because it fits are
intended purpose. Also, I want to point out
that the two properties that are close to our site
, there's a residence up there and then another story
right here at enterprise rent a car that would also
zone B five that greatly reduce our any major problems
with zoning, uh, set bags any of that
. So we didn't have any issues uh in that
sense, that's this is our final conceptual layout.
We ended up putting five kind of five concentrated buildings
in this part of the site without big parking lot
. Right here, we created two roads, La
Voisin Race Lane, um and just to give you
guys a better idea of what it would look like
. Uh This is uh the animation, this is
the current state of the site. It's probably wouldn
it's uh surrounded by three roads road, lakeside drive
and all forest road. There's this big parking lot
right here. As I said, we'll serve these
five buildings. Uh uh That would be great because
it has two entrances along this, this side of
the of the development will be to hundreds in the
back which we designed for employees and uh trucks.
You can see the loading docks right here to which
we thought would be added for convenience, getting in
our decide for normal customers. There is also parking
in front of the stores. Uh so that added
uh just more comfort to the users of the site
. Some of these stories we do know about Petrino
Petko will be there and the uh restaurant Bonaire will
be up there too. But some of them would
just the by any means are are on the side
of the on site. They're going up top,
there is an entrance right here along all forest road
which will primarily serve these two buildings, the restaurant
, which is a um kind of by itself.
But there is this parking lot right here. We
should we add to serve those two buildings. So
this is pretty much what this would look like,
the idea of it. Uh I want to point
out the entrances broke, normal entrances to customers.
One of the two of them will be along Lakeside
drive and one of them on all Forest Road.
Also, there will be, as I said,
the entrance is for employees and trucks on Whitehall Road
. Someone talk a little about ready. Um,
So as you can see, you know, we
have a lot of flat area on our site.
We got about 74,000 square feet of buildings, which
is about 1.5 acres. A little over that on
a six acre site. That was a lot to
do because before we touch the site went from 844
ft all way down to 840, so there was
a whole lot of great that went on there.
Um Due to that, we have to employ a
couple measures, the first of which is retaining walls
as you can see. We have four of them
versus runs right down the side here. 2nd over
here, they're down here And forth along here and
they run from about three ft to about seven ft
tall. Um as I said, with that much
flat space in such a large area, we really
need that to make all the difference in grades everywhere
. And another thing we used as well was the
Swales, as you can see along some of the
walls here, it's raining well here and part of
this retaining wall, we employed Swales in order to
make sure we were really drinking the water where we
wanted to be to make sure that we're all heading
downhill because as you can fairly well see by the
site, um grading plan, it's all sloping from
the northwest down to the southeast because there is existing
, so um are dying down here as you can
see all the finished wild asians are set and they
range greatly uh which made it fairly tricky to tie
in with the sidewalk. You know, we tried
to keep it as flat as we could, but
we had to use a lot of ramps for instance
, in front of here there's two ramps and we
actually used a set of stairs are here to make
up the great between the grocery store and the retail
center as well as the parking lot was fairly big
job that is a huge area there to keep flat
and such a, you know, sloped site.
We maintain a maximum five While keeping the two cross
slope as well as the 88 spots, which aren't
actually showed on here, but they are right here
, right here up here then except for there.
But those had to be two across the entire thing
. So that was a little bit of a challenge
as well as all this talk in front of buildings
here and here where there's no ramps and over here
all had to be kept at two as well.
Um Additionally, as I said, the whole study
was tried to be designed so that we did keep
the existing as much as we could, but still
tied into the existing storm water down here to the
right. We also, as we talked about how
the entrance of employees in the back here along Whitehall
, which works well because there's not much traffic,
it's a much smaller road compared to other too.
Um So I'll make a lot easier for the large
trucks come in and we have to sign the two
truck bed as you can see right here and right
here for the deliveries to the largest doors. There
is a total drainage area of 7.52 acres on this
site, which was divided between 21 inlets. There
are three pipe networks, which there's one along the
west side of the site here connecting to the storage
tank or underground water storage tank. And there's one
connecting the north and east uh inlets and there's one
connecting the two south side and let's, and then
there is a outlet structure that connects to the existing
storm water pipe on the south side of the site
. Um all the pipes range from 18 to 42"
. So we used an underground water storage tank because
there wasn't enough area for a detention basin on the
site. The storage tank was located in the south
side of the site of the one of the lowest
elevations and is in the parking lot area to avoid
building pads in any construction problems. The Um storage
tank is 34 ft by 34 ft by 11 ft
, which was used. Um that was calculated by
finding the Um volume needed from the hydrographic, which
was 9,822 cubic feet of water storage and we found
out that it out falls at a rate of 10.16
cubic feet. This is the outfall structure that connects
to the existing um storm structure and we sloped it
up at.5 to the water storage tank and that
set the elevation for the storage tank invert at okay
at 800 And 1.801.61. And then um the tent
goes up 11 ft and allows for 2.5 ft of
free board. We used um sand filters for BMP
options and we used the D. C. Underground
fault sand filter at 16 different England's. Okay.
These are the existing what utilities around the site?
Um this magenta is existing sanitary sewer which is eight
in diameter and this water line is existing um going
around all forest Lane and then wait whole road.
These are proposed. What utilities we have a water
line water main coming from this existing around the site
. Um And ending up there it creates a loop
system which is a factor of safety in case anywhere
in the pipe there is a break um It can
be serviced from the other side and we have laterals
going to each building and then our sanitary sewer begins
. We have two different networks for that. The
first one begins here and comes up to the existing
and then the other one begins here and ends of
the existing right there And that is an eight diameter
PVC pipe and we have the laterals connecting to each
building. Um These two networks only cost in one
spot which was right here And we had the water
over the sanitary by at least 18 and you can
see along here there separated by 10 ft horizontally.
Yeah, our final project policy cost was about uh
$2.5 million. We managed to change some of the
features such as retaining walls, that diameter and number
of inlets to reduce it by 10% to provide the
client with lesser price more affordable. And the with
the 10% savings, Uh it came down to be
uh$2.22.2 million. Tell us the presentation. Um
You guys have any questions? Yes. Yes.
Storm of paint. Mhm. 34 34 11.
Quickie Vision that being constructed? Sorry, what was
that? What we envisioned that? Okay, what
what will be made? Hell you constructed? There
are companies that you can just give them the dimensions
and whatever you need and they'll construct that. I'm
not exactly sure what material is used. I'm assuming
some sort of reinforced concrete, but I'm not exactly
sure my questions. Do you think your most difficult
part of this whole project site with a lot of
probably created just thinking back to the most. Just
getting it all worked out moving forward. No other
things in mind. You know the way utilities and
store water, trying to entertain all that while making
sure that, you know, one of the half
acres was flat on that six of yourself, because
that was a 50 ft. So I was pretty
tricky putting all the cannonballs and just right, getting
the scales done, How to F five biggest challenge
rest cast out here. All non match. Well
done. Yeah. Good morning. Everybody were the
group from Tri Tech Engineering and we designed the Tall
Oaks commercial flex industrial Development. My name is Bill
Mackey. I'm erin Bartley, Pat smith. All
right. Just a quick overview of our presentation real
quick. I'm just gonna 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 rested 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 it's
a zone for a planned development industrial park. So
as we're going to be developing an industrial facility,
we didn't need to change the zoning 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 Marie'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 as 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. This building
is roughly 100 x 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 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 the storm water
management on down at the bottom. We have about
169 spaces shown on our in our concept. Or
are they out right now and there's only 131 required
parking spaces. Um so grating are greeting was relatively
easy, which is 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 balanced out from that and just
from the roads as you can see, Um it's
just one longitudinal slits 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 silk
fence along the outside to keep all settlement onto the
site, as well as the construction entrance. Um
temporary seating as you can see is the 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.
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 take it over next storm. Thanks both.
I'm going to cover the storm network and detention 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
because you can see here in the blood picture uh
Those delineations are opposed developing 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 Marines 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
. A top right. We have great. And
what's that 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 view of memories right there. Next
, uh, 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, meat into these two
. And let's and flow into our detention on uh
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. Mhm. And then we also have the
eastern parking area, Which will we have to and
let's locate there at two low points. They will
flow to this, these two down here there the
southern parking lot again and they will collect at the
uh detention bond. And this is the nine and
10. And let's again on the left side of
the southern parking. The horizontal pipe layouts. We
got the The touch upon pipe layouts right here.
You've 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 had to have that and live
there for prevent ponding at that island. So the
next thing, I'll talk about a vertical alignments.
Pretty much everything was normal except one constraint with our
loading base because they were so low compared to the
parking area to the right, The floating, We
had to drop the pipe network down to the detention
upon causing the bottom of the elevation of 2 98
298ft compared to the starting point at three or 6
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 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 flows to meet pre development flow
. We're only constrained by east, which is only
a 10-foot easement. So the maximum pipe diameter that
we can use with 18". So, but we
were still able to meet that using the 18 outlet
pipe next we'll move on to that was what are
you doing next line 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
loop from the northeast right of way of mary's road
, all the way down to the southwest of the
lot west of bars, sanitary line needs 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 going to be on
the west side of the loading dock. We hugged
the southern border so we didn't interfere with any future
development and lot six fire hydrant flow. We were
able to fill latin counties requirements for that, which
is to hydrants Profile B. We kept between three
and 6 ft of cover pipe sizing. We follow
the same procedure that was in the engineering design manual
size or pipes using Bernoulli's equation realized that the doctor
iron pipe was best for the Water Saints A sewer
pretty much ran parallel to the water line. 12
ft separation kept over six ft of cover and minimize
their type 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, uh 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 read the led lamps? 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. Billy Bush
. Yeah, looking at all. Thank you.
Uh huh. 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, 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
? Um 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.