Massachusetts Attorney General Martha Coakley on March 26 announced “final agreements” with two companies related to the July 2006 fatal collapse of the Central Artery I-90 tunnel plenum. Settlements totaling $1.9 million end civil claims resulting from the fatal accident. Section design firm Gannett Fleming Inc., Harrisburg, Pa., agreed to pay $1.53 million into a statewide infrastructure fund, $50,000 to the city of Boston and waived $150,000 in project payments. It also agreed to make clients and staff aware of a Federal Highway Administration technical advisory on use and inspection of adhesive anchors. The state also settled with Sika Corp., Lyndhurst, N.J., manufacturer of the fast-set epoxy used to hold the ceiling anchors. The firm will pay $200,000 into the infrastructure fund and cease production and distribution of the epoxy. Coakley dismissed claims against Sigma Engineering International Inc., Lincoln, R.I., a structural engineering firm, and Conam Inc., Auburn, Mass., a materials inspection firm.