Federal jury said firm did not protect worker safety after major 2008 TVA site spill in Tennessee.

The markets continue to grow, but design firms are concerned about infrastructure funding, tariffs and staff shortages.

Jacobs Engineering Group’s intended purchase of CH2M, announced on Aug. 2, has apparently cost the latter its $57-million construction-management contract for the Massachusetts Bay Transportation Authority’s Green Line extension.

The much-speculated purchase, set to conclude by December, would create a $15-billion-revenue firm and includes $416 million of debt.