CHARLEROI, Pa. (AP) Lue Ann Pawlick never envisioned companies connected with oil and gas beating a path to Alta Vista Business Park when it broke ground in tiny Fallowfield, Washington County, in 2001. Today, three of the five companies in Alta Vista work in the industry.

Work continues on a new bridge over the Monongahela River in Monessen, Pa. The original historic bridge that linked two southwestern Pennsylvania counties for more than 100 years was imploded last summer, and the new structure should be open to traffic by next fall.

DONORA, Pa. (AP) Part of the Monongahela River in southwestern Pennsylvania will experience periodic closures through year’s end while a Wisconsin construction company installs a Marcellus natural gas pipeline under the river for a Virginia energy company, the U.S.

Many things change over the course of 70 years, especially traffic patterns, which has certainly been the case for the Homestead Grays Bridge over the Monongahela River in Pittsburgh. The bridge is currently undergoing a reconstruction with a completion date of Nov.

Seven months after the first historical journey, the second segment of Pennsylvania’s Braddock Dam made an identical 27.5-mi. (44 km) trip up the Ohio and Monongahela rivers. On Feb. 27, the 9,600-ton (8,640 t) block of floating concrete was pushed by two towboats from the fabrication site in Leetsdale to an outfitting pier at Duquesne.

History was made in Pennsylvania on July 26 as people gathered along the Ohio and Monongahela (Mon) rivers to see for themselves that concrete really could float. The spectacle was definitely something to see as 22 million lbs. (9.9 million kg) of reinforced concrete slowly made a 27.5-mi.