BACK TO CATEGORIES Photo ID: 1316 (Click photo to view original size.) Category: Excavations Hazard: An employee setting dynamite in an unprotected trench that is approximately 20 feet deep. Standard Violated: 1926.652(a)(1) Corrective Action: Provide trench box or shoring Description: An employee is in a 20 foot deep unprotected trench observing the drilling of a depression before he packs it with dynamite for blasting.