In which direction should the slope go when keying?

When keying into a slope, the direction of the slope should go downward, into the slope, at a minimum of 2%. This practice is crucial for ensuring proper drainage and stability of the soil. By keying downward, you create a slope that facilitates the movement of water away from structures and prevents water from pooling or causing erosion at the base of the slope.

A downward slope ensures that any water that collects or flows over the area can escape effectively, reducing the risk of saturation and potential damage to structures or landscaping. Keying into the slope also helps maintain the integrity of the soil structure, as it encourages good compaction and reduces the likelihood of slippage or landslide conditions.

Maintaining a minimum slope of 2% is important because it is steep enough for effective drainage without being so steep that it becomes unstable or difficult to maintain. This specific angle helps in achieving a balance between adequate drainage and structural integrity of the soil.

Other options suggest slopes that either go upward or are horizontal, which do not facilitate effective drainage. An upward slope could lead to water pooling and increased pressure on the soil, whereas a horizontal level would not direct water flow, increasing the risk of saturation and instability.