When I-695 was completely rebuilt and expanded from two to four lanes through Sparrows Point and Edgemere in the late 1990s, MD 158 was also reconstructed as a mostly two-lane highway without interchanges.

MD 158 begins at a tangent intersection with Riverside Drive, which follows the western edge of the former Bethlehem Steel complex (now home to mixed industrial uses) on Bear Creek in Sparrows Point.

The state highway meets the southern end of MD 157 (Peninsula Expressway), which provided access to southbound I-695, which (prior to 2024) headed toward the now-destroyed Francis Scott Key Bridge.

Beyond an entrance to the steel complex and a ramp to northbound I-695, the divided highway reduces to two lanes and again closely parallels the Beltway and meets the northern end of Wharf Road, which is unsigned MD 151B.

[11] The western terminus of the highway was a trumpet interchange with Tin Mill Road (now Riverside Drive) where the mainline continued northwest as Dundalk Avenue across the drawbridge.

Bethlehem Boulevard had a cloverleaf interchange with the Peninsula Expressway that featured a wide split in the median.