 He also designed and constructed a dam and mills for the Boston Manufacturing Company on the Charles River at Waltham, Massachusetts and the Suffolk, Tremont, Lawrence, Appleton, and Hamilton Mills at Lowell.He reported on the water supply of Lowell and for a time was in charge of the cotton mills and machine shops of the Boston Manufacturing Company as Acting Superintendent.After a visit to Europe in 1849, Worthen came to New York City and to some extent devoted himself to architectural work, building the structures at No 200 Broadway.