Explore the intricacies of the Civil Sheet C4.1 Grading and Drainage Plan, including the storm pipe schedule, storm structure table, and the symbology for the existing and new sanitary sewer. The article provides a detailed overview of how water is managed on the project site, highlighting the elevation points that control water flow into the storm drain system.
Key Insights
- The article discusses the Civil Sheet C4.1 Grading and Drainage Plan, focusing on the storm pipe schedule and storm structure table, often represented alongside the manhole covers outside of the drawings.
- Spot elevations both inside and outside the building help trace the storm system's path, with the water logically collected from high points to lower collection spots, and then channelled out of the building into vaults.
- The article emphasizes the importance of water management on the project site, particularly in the parking area, where water must be appropriately directed into the storm drain system to prevent flooding or water damage.
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Let's spend some time reviewing the Civil Sheet C4.1 Grading and Drainage Plan. When we zoom into this area right here, we will notice that there is the storm pipe schedule, and there's also the storm structure table. These keynotes are typically represented alongside the manhole covers outside of the drawings.
So you can see number 2 here, 4 here, 5 here, and 6 here. If we look on the left-hand side of the page, we'll notice the legend. We can see the symbology for the existing sanitary sewer, new sanitary sewer, existing water service, new storm service, and existing storm service.
Let's spend some time tracing some of this stuff. You'll notice we have the spot elevations outside the building and inside the building. You can see that we have a storm system right here, number 15, and number 14 right here.
So what's happening is the water is collecting along these storm mains. If you look at this spot elevation here, plus 5.4, 5.4 feet, plus 5.1 feet, that the water with this symbol is going from this high point down into this lower collection spot, and then it's going out of the building into the vault. Similarly, high point here, 5.3 over here, 5.1 over here.
The water is going down this path. And so what they're trying to do is to collect the water logically. So again, we have 5.5 feet here, down to 5.1 here, which goes down here into the retention vault.
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It's happening similarly over here. These symbols here, they're labeled as F, are site sections, and we will see them on another drawing. If you look here by the entrance and go up to the dashed line, you can see it's 3.5 here, 4.5 here, 5.0 here, 5.4 here, 5.3 here, and 5.4 there.
What they're trying to do is to control water that might come in as rain through this entrance and direct it back outside into the entrance. Again, more system keynotes, spot elevations, a utility vault right here, meets and bounds information here, a retention swale here. So again, what we're trying to do is we're trying to control how water is managed on the project site.
Since this is the parking area that's on the first floor, we want to make sure that all the water is appropriately directed into the storm drain system. So please feel free to spend some more time reviewing this drawing, and I think you're really going to enjoy seeing the site sections in one of our upcoming drawings.
