SALEM — The gates will open at noon at Ponderosa Jamboree (Park) next Sunday when it hosts the first big show since 2005, according to General Manager Georgia Davis. The music starts at 1 p.m. with several opening acts with Texas recording artist Jason Allen getting the top billing and hitting the stage at 6:30 p.m. Other in the Ponderosa Jamboree stage lights include Derek Black, R.C. Barnes, Jake Penrod, Forest Black and while Jim Morrison and the Stone Ridge Band will also be featured. Once a routine stop on the annual country-western national tour calendar the Ponderosa Jamboree hosts Allen less than three weeks after the release of his new album “The Twilight Zone.” Ponderosa Jamboree is located five miles north of Salem on state Route 45. A singer-songwriter, Allen also plays a multitude of instruments including lead, acoustic, baritone and requinto guitars. The park, Davis explained, is renting the facility to R.C. Promotions and depending on the success of the show t