WEBVTT

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Yeah, good morning, everybody were the group from

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Tri-Tek Engineering and we designed the Tall Oaks Commercial

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Flex Industrial Development. My name is Bill Mackey.

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I'm Aaron Bartley. I'm Pat Smith. All right. Just

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a quick overview of our presentation real quick. I'm

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just going to be going over the initial client goals

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and introduction as well as the grading and erosion sediment

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control while Aaron will be going over storm network and

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that will be going into the water and sanitary as

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well as the conclusion. Um So our site location

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, I'm just relevant from here. It is in

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northern Virginia is located in Loudoun County, so if

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everybody knows where they are here, it's about 4.5

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hours um northeast of here. So I'm sure a

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lot of you guys are from northern Virginia and it's

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located just outside of Washington D. C. To

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the west between Reston and Leesburg right there. Um

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it's just outside the 495 felt, but Um so

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here's our existing conditions site um it's about 10 acres

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and it's completely um wooded and it's undeveloped. Currently

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it is in a pretty or pretty commercial district as

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you can see by the by the two parking lots

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and large buildings and it's located or its zone for

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a planned development industrial park. So as we're gonna

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be developing an industrial facility, we didn't need to

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change is the winning at all. Um There's no

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existing utilities on site and it's actually currently a gravel

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road that's the only access to the site that runs

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along the north right there and it's an extension of

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Murray's Word which is paved and the site is very

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flat actually with 0 to 5% slopes and there's wetlands

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at the north of the site right there, it's

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about a third of an acre and we're actually going

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to remove those wetlands. Um so client goals um

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the improvement of Marie's road was a big thing on

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the end of the paved road is significantly north of

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the side, about 500 ft, and we have

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to actually pave the road all the way down to

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the bottom to the south of our site. And

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um as well is designed to flex industrial facility,

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which if you're not familiar with what that is,

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it's basically a large 50-75,000 square foot building and it's

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mostly a large warehouse and it has 25-35 office space

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with parking and it has loading Bay is located along

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the back. Um This building is roughly 100 by

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500 ft, so it's very long and rectangular to

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allow extra loading areas and the pavement elevation is actually

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four ft below the finished floor elevation, which was

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significant in our grading. So here's our site plan

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overview. This is actually our conceptual layout from the

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beginning, we, as we had to design for

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two buildings. The building to the east is the

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building that is proposed and that actually actually will be

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constructed. While the building to the west is just

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a future development which we only designed for in our

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conceptual plan, Um this is our actual site.

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Um this entire area is just gonna be grass area

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for the future building. While this will be our

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proposed building that will be constructed, it's about 52,000

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square feet. Um You can see here traffic will

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be coming from the north and wood and car traffic

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will just be coming into the parking area where the

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front of the building will be located while um truck

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traffic will be able to come into our site access

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or access road into the loading base and you can

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see the water and sanitary lines which run through the

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site and then on the stormwater management, on down

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at the bottom, We have about 169 spaces shown

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on our Um concept for our layout right now,

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and there's only 131 required parking spaces. Um so

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grading, our grading was relatively easy with just um

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maximum five slips, but we actually had 8000 cubic

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yards difference and fill, which is rather significant.

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And we understood that if we just lowered the building

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pad by about one ft than everything would be um

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balanced out from that. And just from the roads

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, as you can see, Um it's just one

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longitudinal slopes with typical cross sections. Um So the

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roads were relatively easy to develop original sediment control.

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We have uh to settlement basins on site, one

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at the top and one at the bottom, and

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these are separated into two drainage areas. Look at

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just as you can see from this large drainage divide

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across the middle. Um We have diversion dykes to

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assist in those um and draining into the sediment basin

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as you can see, and then still fence along

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the outside to keep all settlement onto the site as

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well as a construction entrance. Um temporary seating as

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you can see is only place right here as that

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will be where the future building is going to be

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, as well as the stockpile area with a silk

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thin surrounding it um are face to measures include um

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dominantly uh protection as we have a rather large amount

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of inlets along Murray's road as long as as well

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as around the parking areas. So those will need

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to be protected to protect the storm water system.

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And then permanent seating as you can see, will

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be placed in the large grass area where the future

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building will be placed as there won't be any construction

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there after the initial grading of the site. And

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also um the phase one uh Original settlement control sediment

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basin is the same as our storm water managers upon

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, which will just dredge out and convert into a

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permanent stormwater management facility. I'll let Aaron, thanks

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. But I'm going to cover the storm network and

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touch upon. Uh Start with the pre and post

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development donations. The redevelopment donations contain three watersheds.

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Uh The watersheds roughly divide the site from north and

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south. So we tried to uh all that with

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our grading as you can see here in the blood

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picture. Uh Those delineations are post development delineations and

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we try to get those to flow down to our

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new detention pond at the bottom there. And then

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on the bottom right here is our Marie's road.

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Um Uh delineations, they will flow into the Marie's

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road network. And we were we produced over 500

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difference and run off between our post and pre development

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. So I'll talk about the storm network. Start

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with the inlets. We have four main systems uh

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Start with Marie's road. The top right, We

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have great and let's collect all the water from the

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north of that. And then uh down here at

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the bottom bottom left, we have to sack curb

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and let's uh collect the all the water at that

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point there. As you can see right here.

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And that's the plan. Do you have memories right

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there. Next system is the access road which we

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have split into two separate sides with a high point

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in the middle of the road. The top of

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the road will flow into the marine road network up

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here into the sunlight and flow and to the marines

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road. And then the bottom will flow down into

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our southern parking lot, meeting to these two and

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lets it flow into our detention. On the next

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is our loading bay area. We have two great

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templates that are placed within the loading beds, will

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take about half the runoff from the building, the

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loading bay and the grass area to the left of

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their. And then we also have the eastern parking

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area, which will we have to end, Let's

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locate there at two low points. They will flow

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to this these two down here at the southern parking

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lot again and they will collect at the uh detention

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bond. And this is the nine and 10 inlets

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again on the left side of the southern parking the

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horizontal pipe layouts. We got the uh touch upon

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pipe layouts right here, You got the nine and

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10 down here again, the wedding day in the

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middle and then the parking area there on the right

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and then the Marie's right again showing the sad curve

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and then they great inlets up top and for pipe

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sizing. We went with 15 pipes for all our

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pipes. We used the rational method. The terminus

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only exception was the 12 pipe here between nine and

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10. We had to do that. We have

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to have that and live there for um prevent ponding

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at that island. So the next thing I'll talk

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about the vertical alignments. Pretty much everything was normal

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except about one constraint with our loading base because they

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were so low compared to the parking area to the

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right, the flooding. We had to drop the

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pipe network down to the detention pond Because in the

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bottom of the elevation of 2 98, 298 ft

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compared to the starting point at three or six.

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And retention pond you can see in the profile,

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lower jumps up and goes back down. Um So

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our detention pond, it was determined to be 18,000

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cubic feet. You can see the plan view here

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. We got the three and let's come in and

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then that's gonna be our allies coming out. You

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can see this outlet flowing out here. We decided

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to go with a dry pond and we were able

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to meet the post development close to meet pre development

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flow. We're only constrained by east. It is

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only a 10 ft easement, so the maximum pipe

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diameter that we could use with 18". So,

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but we were still able to meet that using the

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18 outlet pipe. So next we'll move on to

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paddle. What are you doing next along here?

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Uh Like both said before, I'm going to cover

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wet utilities very briefly and the cost estimate and try

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to wrap everything else as fast as I can to

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start off to review the client goals. Um They

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need the water lines loot from the northeast, right

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of way of mary's road, all the way down

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to the southwest of the lot west of ours,

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sanitary line to connect from the building down to the

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same area in the southwest. The owner of the

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Jason properties allowed us to throw in Eastman in their

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our design approach pretty much followed the procedure of the

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land water engineering design Manual and all the other Live

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in counties only requirements, facility standards manual. Um

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Our plan view basically, we started off at the

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top building connection at the northern face of the building

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. We ran down the center of the loading dock

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. So we didn't Interfere with the future building is

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gonna be on the west side of the loading dock

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. We hunt the southern border, so we didn't

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interfere with any future development and lot six fire hydrant

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phone. We were able to fill latin counties requirements

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for that, which is to hydrants Profile View.

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We kept between three and 6 ft of cover pipe

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sizing the follow the same procedure that was in the

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engineering design manual size or pipes Using Bernoulli's equation realized

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that eight inch ductile iron pipe was best for the

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water sanitary sewer, pretty much ran parallel to the

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water line. 12 ft separation kept over six ft

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of cover and minimize the pipe, slopes. Pipe

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sizing was done using the engineering design manual stated before

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. H. P. V. C. Pipe

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was selected using manning's equation, Cost analysis. Total

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cost was just over$2 million. And just to

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recap we followed all the clients procedures. We not

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only did that, we did so with the county

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requirements and we think that we did an efficient and

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economically feasible design. We'd like to thank you all

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for your time and mentors, kevin, john and

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brian for all their help. Does anyone have any

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questions? Why don't you guys have to remove the

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weapons? Um well we actually in our value engineering

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when we designed for the second building, we removed

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them because if they were to develop the second building

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then they would have to because the buildings themselves take

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about 25 of the site. But in our value

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engineering we said if you were to like if the

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client were to decide not to build the second building

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, then it would actually save Like roughly 70 of

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wetlands, which saves costs about$30,000. So we

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put that in the value engineering and um in the

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end to save some money if they want to have

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that option. any questions. Yeah, I think

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that at all. Thank you. Thank you.

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Yeah. Alright. That concludes our final presentations and

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I'd like to uh just offer a couple of comments

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uh from my perspective, I'm extremely proud of the

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students in my class. Um The presentations this morning

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, we're very professional, very well done, very

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practiced and quality of engineering done shown throughout the last

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four months. It's very good. You guys,

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we can tell you put a lot of hours in

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my right, is that is that an understatement?

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Uh I think the mentors no as well. Um

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but what I'd like to have you guys do is

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thank the mentors for all of your help. Could

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you help me? They volunteer their time and their

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expertise and uh probably put up with some exasperation on

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your part during the semester at certain times and handle

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it quite well, I'm sure, mm you know

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it's tough, it's a learning process that some of

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them have gone through in this class and they know

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what it's like. So those folks that didn't go

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through the class um learned it somewhere else and I'm

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sure found it just as frustrating and it's it's not

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easy what you've just gone through but it certainly will

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help you in your future career.