Getting Started: 1933-1938
![1935. Placing the McKiernan steam hammer.](7.jpg)
1935. Placing the McKiernan steam hammer.
Contact
Grand Coulee Visitor Center
(509) 633-9265
pninfo@usbr.gov
Columbia River Basin in Idaho, Oregon, Washington,
Montana & Wyoming
1935. Placing the McKiernan steam hammer.
Contact
Grand Coulee Visitor Center
(509) 633-9265
pninfo@usbr.gov