Description: test ability to interpret and modify site topography to conform to a given set of program requirements.
Considerations
- Site elements may include parking areas, driveways, existing excavations, existing building structures, level OR sloped building pads, existing paved areas, sidewalks and the like.
- existing contours at 1’, 2’ or 5’ increments, probably 1’ intervals
- existing side streets at fixed elevations
- trees and/or other natural site features
Recommendations
- Understand site contours, slopes, swales, berms, crowns or ridges and how to manipulate contours is the main importance
- Check site plan first, learn what interval the contours are set at, this effects the distance needed to be maintained between them
- Use the sketch tools to measure distances between existing and modified contours
- Sketch center lines of proposed swales prior to manipulating existing grades
- A zoomed look at the site, note conditions and elevations of existing elements prior to manipulating contours
- Use sketch circles to represent req’d distances between contours to meet the program.
- PARKING LOTS: Drainage within a lot MUST be consistently handled with equal separation of contours to ensure a smooth flow of water to the sides or to a given point of collection.
- Swales may be used on the sides of the lot to direct the run-off
- Positive drainage from a level area requires the next lower contour to “surround” the entire level area.
- Use swales also to direct the water from there
- If a sloped surface is to remain sloped, do not change the contours in that area
- Water up slope of a given level paved area should not be allowed to flow onto that paved surface
- Note existing street grades, DO NOT ALTER
- DO NOT ALTER contours in tree drip lines
- Swales are indicated by contours “pointing” UP the general slope, lower numbered contour points up toward higher numbered grade contour
- Crowns “point” down the general slope, higher numbered grade contour points down toward lower numbered grade contour
- Grades must not be altered beyond the property lines shown on the existing site plan
Scoring issues
- draw max and min slope requirements accurately
- drainage is properly directed around features as programmed
- Do not disturb trees, stay clear of drip lines
- Don’t alter contours past prop line
- Existing street and site feature grades are noted but not altered
- Contours do not cross or split
- Crowns are shown to direct water off roads or parking lots, unless otherwise programmed
- Swales or crowns have been indicated correctly
- Contours are EVENLY spaced on surfaces requiring a uniform, constant slope
Notes taken while reading on 4/22/09 8:45-9:45pm 1-hr
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