The pen was built of fieldstones that were set on soil or on bedrock where it was high (length of excavated section 4 m).
The cistern was bedrock hewn and had two openings. The capstone on the eastern opening was a round monolith section with a hole in its center. A trough was situated nearby. The western opening, identical to the eastern one, was destroyed and no longer used; fragments of its capstone were still located nearby.