Helena Valley pumping plant and tunnel, constructed 1957-1959, Missouri River Basin project, Montana
Subtitle: technical record of design and construction.
Publisher: s.n.
Published: 1961
Place of publication: Denver
Language: eng
Number of pages: 163
Subjects: Missouri River Basin Project (U.S.). -- Helena Valley Unit.; Pumping stations.; Tunnels.
Notes: Bibliography : p. 163.