Mo'ed Katan 4b-6a
What types of renovation and construction projects may be done on Chol Ha'moed? \u2022 Road maintenance is a high priority public need \u2022 We are encouraged to pray for divine mercy for suffering penitents \u2022 How do we know that various sites transmitting Tumas Ohel (ritual impurity engendered through sharing a covered enclosure with a corpse) must be marked? \u2022 Laws pertaining to fields with a grave whose precise location can no longer be identified or has been plowed over \u2022 When are we required to take communal responsibility?