Remove Old Post and Set New Post in Concrete

What happens here

Assess the existing mailbox setup and post. Note that the old mailbox is slightly low, and US Postal Service regulations require specific height clearances. The old mailbox post is then cut down with a chainsaw. Dig a hole for the new cedar log post. Place the new post in the hole, ensuring it is at an appropriate height for postal service regulations (a bit higher than the old one). Add two 80-pound bags of Quikrete high-strength concrete mix around the base of the post in the hole, and then add water to activate the concrete. Allow the concrete to dry and set.

Goal: Install the new cedar log post securely and at the correct height