It will cost Union Gap more than $20,000 to send them to the National League of Cities Conference.
Union Gap usually only sends two workers at half the price.
The city cays its needs to send four this time to meet the key players.
"The trip is centered around the fact that we have new legislators both at the state and the federal level. It's going to be a busy time of year for us to get back there and see them at these conferences, so it's important that we connect with them. It's a way for us to connect projects with dollars and it's a way to keep local taxes down," said City Administrator, Chris Jensen.
Union Gap says it received $2 million in federal aid because of the last trip taken in 2010.