Boathouse Excavation Between Oak Trees

Excavating for a boathouse centered between two 32" oaks (32' apart) with 6' clearance is workable. Root loss will cause some dieback on excavation sides.

Damage Mitigation

• Center placement best—equal impact, both trees survive
• Offsetting sacrifices one tree for the other
• Post-excavation: Fertilize both trees (10-10-10, 1 lb/inch diameter)
• Monitor for: Dieback, stress, borer attraction

Sandy Soil Advantage

• Roots deeper in sand—less concentrated in excavation zone
• Better drainage reduces compaction risk
• But: Less water holding = more irrigation needed post-damage

Fertilization guide here. Your centered approach with follow-up care gives both oaks best survival odds.