 However, the proposal would mean digging a 16-mile tunnel, which includes construction in Milford. Besides environmental concern, many are also worried about the price tag, costing roughly $50 billion to complete. If approved, the construction would begin in 2028. Sponsored by Courtesy Carpet Flooring Design Center. Now is the time for a fresh new look for your home. Save on top flooring brands at Courtesy Carpet, Route 111 in Monroe. I'm Melissa Sheketoff, WACC News.