in Holladay. However, a citizens' group named Cottonwood Inc. halted right-of-way acquirements due to the lack of an environmental impact statement (EIS). Also controversial was a proposed cloverleaf interchange at 2000 East. By mid-1975, an EIS was released with four main alternatives: a no-build alternative which would leave a gap in the southeast quadrant, building the road along the modern-day path (at about 6400 South), moving the southern portion southwest through Fort Union and Midvale to 7200 South, or extending the eastern portion further south to Sandy and then west along 9000 South. Cottonwood Inc. filed a lawsuit challenging the EIS. Meanwhile, I-215 from SR-201 in the western quadrant to 280 East in Murray opened in November 1976. After 1976, gaps in the belt route were present from 2100 North near the airport to SR-201 and from State Street in Murray to 4600 South in Holladay. The first step in completing the gap was taken in June 1979, when construction of the Interstate from State Street to 700 East began. This was followed by the Cottonwood Inc. lawsuit being awarded in favor of UDOT in November 1979. In July 1985, the route from 280 East to Union Park Avenue was completed. At the time, this portion of road was the most expensive in the state in terms of cost per mile, due to the road being depressed below surrounding neighborhoods. The next section to open was from 2100 North south to I-80 in 1987. This was followed by a section between Union Park Avenue and 2000 East, opened in November 1987, which was also built as a sunken freeway. The western quadrant of the freeway was completed in October 1988, closing the gap between SR-201 and I-80 (however, the California Avenue interchange wasn't opened until mid-1989). In August 1989, the road from 2000 East to 6200 South was finished, and the belt route was completed with the opening of freeway between 4500 South and 6200 South in October 1989. Since 1989, major modifications have occurred on the belt route, consisting of the rebuilding of the southern I-15 interchange in 2001, widening the freeway from six to eight lanes from 4700 South in Taylorsville to I-15 in Murray in 2004, and the addition of an interchange at Legacy Parkway in 2008. The 3300 South and 4500 South overpasses were rebuilt as well, in 2008 and 2007, respectively. In November 2017, a