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A well-maintained pipe fence can last anywhere from 20 to 50 years, depending on factors like material, climate, and maintenance. Galvanized or coated pipes resist rust and corrosion better than other alternatives, so they tend to last longer, especially in humid or wet environments. Routine maintenance, such as inspecting for damage, removing rust, and applying protective coatings, helps extend the fence’s lifespan significantly.

When your rolls of silt fence join together, you’ll want to overlap them to make sure they’re still as effective at keeping water out without requiring fastening together. Overlap two sections of the silt fencing so that two sheets of fabric cover the span of two posts. If you want to fasten them together, you can staple them or use a zip tie, depending on whether your posts are metal or wood. 

You can sometimes install a fence over a gas line. Fence installation typically requires a two-foot depth for posts, so if the lines are shallower than two feet, you cannot put a fence post over the line. You’ll need to call 811 to get the gas lines located and marked before you start the project.

Ideally, when you replace a fence post, you should also replace the concrete footing. The concrete bonds to your new post, creating a secure base. If you install a new post into old concrete, it won’t be as sturdy.

That said, it is possible. Sometimes the post will lift right out of the concrete. If not, you can use a high-lift car jack to try and lift the pole out of the footing. Put the new post into the same hole and backfill it with fast-setting concrete. Keep in mind, this won’t work well for metal posts.