Complex sentence: In 1959, the route's west end was extended north to SR-244 in Helper, reflecting its current alignment (south from Helper to Kenilworth road, thence northeast to Kenilworth).
Split into simpler sentences: In 1959, the route's west end was extended north to the former SR-244 in Helper. The result is the current alignment of SR-157 (south from Helper to Kenilworth road, thence northeast to Kenilworth).