When should a saddle trench expedient latrine be closed?

A saddle trench expedient latrine should be closed when it becomes filled to within one foot of the surface. This guideline is in place to ensure proper sanitation and hygiene. If the latrine is filled too close to the surface, it increases the risk of waste exposure, attracting pests and insects, and can lead to contamination of the surrounding soil and water sources. Keeping a foot of space ensures that the likelihood of waste surfacing and polluting the environment is minimized, maintaining health and hygiene standards. Additionally, this practice helps to prevent unpleasant odors and ensures that the latrine is functional for as long as possible before needing to be closed and a new one dug.