What the picture shows can't be called excavation - a word normally reserved for archiological digs! What I see looks more like some renovation work to fix a leaking pipe or install new ones. The picture also shows that this is being done on the grounds of the Masjid Al-Aqsa. No one in his right mind would do archiological excavation within the shown area!
Jordan foreign minister says to speak with Kerry on Israel-Palestinian conflict (Reuters)
from the article: Waqf Temple Mount excavation raises archaeologists' protests