In a Dutch oven, cook the bacon over medium heat until crisp.
Remove bacon from the pot and place on a paper towel lined plate to drain; set aside.
Add butter to the bacon drippings and sauté the celery, leek, and onion until tender.
Add the minced garlic and cook until fragrant, about 1 minute.
Sprinkle flour into the pot and stir to combine with the vegetables. Cook until flour begins to brown slightly. This is the base for a roux and will help to thicken the soup.
Stir in the diced potato, chicken broth, clam juice from the two cans of chopped clams, salt, pepper and the bay leaf.
Bring the mixture to a boil. Reduce heat and simmer, covered, for 20-30 minutes or until the chunks of potatoes are tender.
Whisk in half and half to the soup. Bring to a low simmer. Cook and stir over low heat until soup thickens 5-10 minutes.
Add in 2/3 of the cooked bacon, and season to taste with Old Bay seasoning.
Crumble the remaining bacon.
To serve, garnish each bowl of chowder with crumbled bacon and fresh chopped chives.