William B. Conway, who was in charge of the design of the second span of the Crescent City Connection in New Orleans and other Mississippi River crossings, died of congestive heart failure Monday at Ochsner Medical Center. He was 84.

Conway was a partner in Modjeski and Masters, a national bridge engineering firm, from 1969 until his retirement in 2007 and was its CEO from 1992 through 2004.

He was the principal-in-charge of the designs for the Interstate 10 bridge across the river in Baton Rouge, the Hale Boggs Bridge in Luling and the second span of the CCC, which was then known as the Greater New Orleans Bridge.

He also directed the design work for the widening of the Depression-era Huey P. Long Bridge in Jefferson Parish.

Conway was born in Southampton, New York, and graduated from Dartmouth College. He received a master’s degree in civil engineering from the Thayer School of Engineering and later was on the faculty there.

He was a U.S. Navy Seabee for two years and joined Modjeski and Masters in 1957 in Harrisburg, Pennsylvania. He and his family moved to New Orleans in 1961.

Conway received many awards, including the John A. Roebling Medal for lifetime achievement in bridge engineering in 2007, awarded annually at the International Bridge Conference.

He was a former chairman of the board of Trinity Episcopal School, which his seven children attended, and treasurer of the vestry at Trinity Episcopal Church.

He also was involved in the founding of the St. Thomas Community Health Clinic in New Orleans and was a member of numerous New Orleans social clubs and Carnival organizations.

Conway was a member of the Tulane University School of Engineering’s board of advisers and a trustee of the West Chop Club in Martha’s Vineyard, Massachusetts, where he spent many summers.

Survivors include his wife, Florance “Bonnie” Scott Conway; four sons, William B. Conway Jr., of Potomac, Maryland, Robert S. Conway, of Edina, Minnesota, Peter J. Conway, of Charlotte, North Carolina, and Edward B. Conway, of Darien, Connecticut; three daughters, Eleanor C. Edwards, of Darien, and Elizabeth C. Crawford and Laura C. Williams, both of New Orleans; and 19 grandchildren.

A memorial service will be held at 1 p.m. Monday at Trinity Episcopal Church, 1329 Jackson Ave., with visitation beginning at 11:30 a.m. Lakelawn Metairie Funeral Home is in charge of arrangements.