SPOKANE, Wash. -

Pyrotechnicians have spent all day Friday preparing for fireworks displays all across the area, including Spokane's display down at Riverfront Park.

“We've been here for two days solid days starting at, eight o'clock in the morning and we work through the course of the day,” Matt King said.

King and his crew have been setting up hundreds of fireworks in Riverfront Park.

“Everything is completely scripted. We are sent a list of all the things we are supposed to be blowing up, and then how they are supposed to be grouped,” King said.

He says the spot is the best for it because they have to shoot over the water so people can get pretty close.

“They can expect an absolutely perfect night. It should be temperature-wise perfect, a cloud standpoint, perfect,” King said.

Debby Dodson with Spokane Parks and Recreation agrees. She said they'll be using some fireworks they haven't used in more than 20 years.

“We're really excited about the fireworks this year, it's to help celebrate the 40th anniversary of the Expo. It's one of the biggest shows we have five inch shells going off which we haven't had I guess since 1989,” Dodson said.

While it's a tough job pyrotechnicians say it's an awesome feeling to be a part of history.

“You go through all of this work and then it's done in 20 minutes and you're like (sigh) yeah that was worth it,” King said.

The fireworks show in Riverfront Park starts at dusk.