Backers of Initiative 2066 turned in more than 431,000 signatures Tuesday afternoon to the Secretary of State’s Office in Tumwater with the hope of getting the measure to protect energy choices like natural gas and propane on this November's ballot. The Building Industry Association of Washington, Let’s Go Washington and other partners held two news conferences on Tuesday, one at noon in Redmond and another at 3 p.m. at SOS headquarters to deliver signatures.