A week after losing his state Senate race, labor leader John J. Dougherty announced plans to step down tomorrow as chairman of the city Redevelopment Authority. His term was not slated to end until early next year.

“I am resigning at this point in time because I believe I have accomplished all the goals I set for myself and have served the authority with distinction for eight productive years,” Dougherty, business manager of electricians union Local 98, wrote to Mayor Nutter in a letter he hand-delivered to City Hall early yesterday.

In later interviews, Dougherty and Nutter disclosed some of the details of a conversation they had in January in which Dougherty acknowledged Nutter’s desire to install his own agency chairman. Both men said Nutter did not directly request Dougherty’s resignation.