Amazon recently announced it will open a second headquarters, and some senators are urging Gov. Tom Wolfe to market Western Pennsylvania for the site.

Three state senators representing Butler County are among a group of 11 lawmakers urging Gov. Tom Wolf to aggressively market Western Pennsylvania as the home for Amazon's proposed second headquarters.

Sens. Elder Vogel, R-47th, Don White, R-41st, and Scott Hutchinson, R-21st, all signed the letter, which is dated Sept. 13 and was sent to Wolf earlier Wednesday, according to a spokesman for Vogel.

The letter references recent media reports surrounding Amazon's plan to construct a second corporate headquarters.

In it, a group of 11 state senators urge the governor to promote Western Pennsylvania as an “ideal location for this major economic development opportunity.”

The project is valued at $5 billion, about $1 billion less than the Shell ethylene cracker plant that is scheduled for construction in Beaver County.

“Strong legislative support exists to work with the Administration to bring the headquarters here,” the letter reads, in part.

The senators also note that Amazon's “extensive” presence in Pennsylvania already includes a software development center in Pittsburgh, pickup centers in State College and the University of Pennsylvania campus in Philadelphia, and facilities in a number of other communities across the state.

The state provided the company with more than $22 million in incentives last year alone, as part of a deal where Amazon agreed to invest at least $150 million and create 5,000 full-time jobs over a three-year period.

Amazon's original corporate headquarters is in Seattle.

The state legislators, in their letter to Wolf, called the prospect of landing Amazon's HQ2 project something that could represent a “transformational event,” for the region's economy.

“We are an important crossroads that connects the northeast, the south, as well as the Great Lakes region and all points west,” the letter reads, in part. “Development of Amazon HQ2 in Western Pennsylvania would truly be a much-needed regionally transformational event ... state government should actively and strenuously promote the many assets that make this region an excellent candidate for this corporate headquarters.”

The letter comes after speculation has swirled in recent days that cities like Pittsburgh and Philadelphia could be contenders for Amazon's HQ2, with observers disagreeing over what factors — tax incentives, a labor market flush with talented employees, or quality-of-life concerns — will be most likely to draw the company's attention.