Black and white photograph showing men on a railroad construction site.

Black and white photograph of construction site

Black and white photograph of construction site

Black and white photograph showing rail carriage being transported on cables in a mountainous area.

Black and white photograph showing rail carriage being transported on cables in a mountainous area.

Group photograph of passengers on the Mount Lowe Railway, a rail car that ascended Echo Mountain. A sign reads 'Echo Mountain, 3,500 feet above sea level'. A streetcar is to the right of the cablecar. The Mount Lowe observatory can be seen in the background of the photograph.

Black and white photograph of M M O'Shaughnessy and a group of four men standing on a railroad construction site.

Two copies of a black and white group photograph of the City Engineer's Baseball Team. O'Shaughnessy is wearing a suit and hat, and is standing in the back row.

Two copies of a black and white group photograph of the City Engineer's Baseball Team. O'Shaughnessy is wearing a suit and hat, and is standing in the back row.

Black and white photograph of M M O'Shaughnessy and a group of 12 other men at the dedication of the Pittman plaque at the O'Shaughnessy dam.