State why it is necessary to identify the existence of overhead and underground services.

State that the presence of underground services (drainage, water, sewage, gas, oil, electricity, cable TV) may limit where excavations can safely be made, and overhead cables may restrict site access for equipment and large plants. Implications of damaging services in addition to health and safety: cost, inconvenience, damage to soil.

OVERHEAD SERVICE

State why it is necessary to identify the existence of overhead and underground services: Health and safety issues; Soil movement/levelling can alter the depth cables are under the ground; Planning of planting: Do not plant trees under overhead lines; Or plant trees over sewage pipes where the roots can enter via damaged pipes and cause pipes to block up.

UNDERGROUND SERVICE

State why it is necessary to identify the existence of overhead and underground services: Health and safety issues; Soil movement/levelling can alter the depth cables are under the ground; Planning of planting: Do not plant trees under overhead lines; Or plant trees over sewage pipes where the roots can enter via damaged pipes and cause pipes to block up.