4000 West is an access point for Rock Island Waterfowl Management Area. All the birding here is done along the road which can be walked. The habitat is typical wetlands on the south shore of Utah Lake, with some drier more grassland type habitat as well as shrubsteppe.
Birding can be done very easily here by parking and walking at various points. Theoretically you could drive into the north end, park, and walk back to the road birding by foot. Waterfowl, shorebirds, divers, other waterbirds, and various neotropic migrants can be found here during the spring and fall. Some notable species that have been seen here include HARRIS'S SPARROW, NORTHERN WATERTHRUSH, GLOSSY IBIS, and GREATER SCAUP. Potential for fallout here with some good Russian Olive patches--these trees have produces a multitude of unexpected songbirds here including OLIVE-SIDED FLYCATCHER, WESTERN TANAGER, VIRGINIA'S WARBLER, NASHVILLE WARBLER, and BLUE GROSBEAK. If you're birding nearby Swede or River Lane, its worth a couple minutes extra drive to stop here and see what is around.
From I-15 exit 260 in Springville go west on 400 South for .4 miles. The road will jog to the left here--continue for another 3.5 miles. The road will go south another .3 miles. Turn Right onto UT-77/440 South and follow this as it becomes 3200 West for another 1.4 miles before turning right on 5200 South. Follow this for 1 mile till you reach 4000 West. Turn Right here and you can look for birds for a mile as the road goes north until it dead ends at the lake.