NISQUALLY, Wash. -- Arrests at the Standing Rock oil pipeline protest in North Dakota have encouraged members from a host of Western Washington tribes to return to the conflict.

Since protests over construction of the $3.8 billion Dakota Access Pipeline began, tribal members from across the country have either remained at the site or gone and returned.

Nancy Shippentower, a Puyallup member and longtime activist, has already been to the protest twice and plans to go back.

"I grew up in the fishing rights struggles of the '60's," she said. "I want to go. I feel like I need to be there."

Organizers of one caravan of protesters planned to head out from Seattle Friday morning. Shippentower intends to fly there next week.

"Mother Earth is precious," she said. "Once you put the oil like in and there's just a little leak, it's going to destroy that."

More than 100 people were arrested at Standing Rock Thursday. Police said they were on private property trying to block the path of the pipeline. Other camps of protesters remain on public lands nearby.

Related: Dozens arrested as police clear Dakota pipeline protesters camp