Renovation of an historic, self-propelled steam drill on display for 30 years at Portage Cove is nearing completion.

David Pahl took apart the six-ton machine last winter, replacing fir timbers, grinding and repainting its iron wheels and carriage, and adding a chimney to its steam boiler. He recently reassembled it on a new, concrete foundation at Lookout Park.

Pahl, founder of downtown’s Hammer Museum, won the $18,800 job to restore the drill to its former…