Newly added editions of The Tribune were digitized from some of the more than 2,500 bound volumes of the newspaper that MediaNews Group, The Tribune's owner, donated to the University of Utah in a deal finalized in July 2009.
Salt Lake City bookseller Ken Sanders valued the gift of newspapers from 1871 to 2003 at $650,000, according to media reports at the time.
The library intends eventually to digitize all editions of The Tribune, said John Herbert, head of digital ventures for the library and program manager for the newspapers project.
The project, which the library said draws about 174,000 genealogists, historians and other researchers annually, recently added pages from four rural Utah newspapers new to the project.
The four papers are the Brigham City Bugler (1891-1895), the Gunnison Valley News (1909-1935), the Milford/Beaver County News (1916-1946) and the Mount Pleasant Pyramid (1912-1950).
The Milford paper was added at the request of Dell Vaughn McDonald, a retired Air Force colonel.
"I spend a good deal of time doing historical research, so having my hometown paper at my fingertips is a wonderful convenience," McDonald said in a statement.
Herbert said the project receives no state funding and must raise money to move forward through grants and donations. In its 11 years of existence, it has raised $3.9 million, he said.
The recent additions to the online archive were funded in part by a grant from the Utah State Library Division, Department of Heritage and Arts, and the Institute of Museum and Library Services, which administers the Library Services and Technology Act.
"This is a fantastic resource," Herbert said, not only because it offers readers insight into which types of local news were important in Utah cities and town but also because readers can see how newspapers covered World War I and other historic national and international events.
Organizations such as the Park City Museum, Davis County Library, Uintah County Library and Grand County Library are among project donors.
Vernal residents are "thrilled to have online access to the Vernal Express," Sam Passey, Uintah County Library director, said in a statement.
"The investment we've made in the project has reaped great benefits," he said. "We hope to continue our support, bringing even more issues online."
Utah Digital Newspapers project
Readers may search 100 historic Utah newspapers online at digitalnewspapers.org.