Designated dumping area shall be elevated at least what percent towards the crest?

Designated dumping area shall be elevated at least what percent towards the crest?

• A. 1%
• B. 2%
• C. 0.5%
• D. 3%

Answer: (A)

The design aims to keep drainage clear and the dump stable by giving the designated dumping area a small uphill grade toward the crest. A minimum of 1 percent means the elevation rises by 1 cm for every meter of horizontal distance toward the crest. This gentle slope helps shed rainwater away from the dump face and reduce surface water buildup and seepage pressures, which supports slope stability and reduces erosion. Too little slope wouldn’t move water effectively, while a steeper grade would add unnecessary complexity and potential instability, so 1% is the appropriate balance.

The design aims to keep drainage clear and the dump stable by giving the designated dumping area a small uphill grade toward the crest. A minimum of 1 percent means the elevation rises by 1 cm for every meter of horizontal distance toward the crest. This gentle slope helps shed rainwater away from the dump face and reduce surface water buildup and seepage pressures, which supports slope stability and reduces erosion. Too little slope wouldn’t move water effectively, while a steeper grade would add unnecessary complexity and potential instability, so 1% is the appropriate balance.