Dogfish Head and Sierra Nevada, two family-owned craft breweries known for their unique hopping techniques, are deepening the bond they forged with the 2009 collaboration Life & Limb.

Their new beer, an East-meets-West Imperial IPA called Rhizing Bines, will clock in at 8% ABV and 70 IBUs.

“We had a lot of fun brewing the original dark and roasty Life & Limb in Chico with the Grossmans and Sierra Nevada’s extended family,” says Dogfish Head President and Founder Sam Calagione. “We are very proud of the way that beer turned out. Now it’s our turn to repay that hospitality and brew a very hop-centric IPA in Milton with our pals from Chico, incorporating innovative ingredients and techniques from both breweries.”

The beer

On the hot side, Rhizing Bines will go through Dogfish’s signature continual-hopping process with floral and citrusy Bravo hops. On the cold side, it will be dry-hopped with an experimental varietal so new it doesn’t yet have a name, just a number: Hop 644. A component of Sierra Nevada’s aroma-boosting Torpedo system will make a pit-stop in Delaware for dry-hopping duty before it heads to Sierra’s new North Carolina brewery.

To celebrate Sierra Nevada planting East Coast roots, Dogfish Head tracked down a Carolina heirloom wheat grown and milled at Anson Mills. The soft red winter wheat contributes subtle sweet and nutty notes to this hop-forward ale.

“It gives my wife and myself great comfort to know that although we’re leaving our home and friends on the West Coast, we’re joining our craft brewing friends on the East Coast,” says Sierra Nevada General Manager Brian Grossman. “Here’s to great beer!”

The label

The label for Rhizing Bines depicts the pairings behind this beer: two hop varietals, two yeast strains (Chico and Doggie), two unique hopping processes and two family-owned breweries. These bonds start at the root – or rhizome – and stretch throughout the mature bines.

“Sam and his family and the entire Dogfish crew have been friends of ours for a long time,” says Sierra Nevada Founder Ken Grossman. “When we started talking about doing another collaboration we jumped at the chance, especially since this version will be the hoppy counterpoint to the last brews. We couldn’t say no! We’re looking forward to joining forces again. We’ve got one of our Hop Torpedos on a truck right now on its way to Delaware via North Carolina, and we’re eager to taste the finished product.”

Rhizing Bines will be brewed at Dogfish Head’s coastal Delaware brewery. It’s expected to hit taps and shelves throughout Dogfish’s 27-state distribution network in February 2013.