If you replace a bridge, will global sea levels really rise?

Portland Transport: "NO CRC" Ride Pedals Through N/NE Portland

To chants of "12 Lanes - Insane!" I rode with 60 or so other cyclists today on a "No CRC" (Columbia River Crossing) ride as part of Pedalpalooza, the annual bike festival.

The ride was a co-production of local cyclists and Rising Tide, a national climate change activism group.

Interstate Bridge: Information from Answers.com

Currently, many traffic engineers consider the bridge to be obsolete, both due to its age and its limited capacity. The bridge is frequently a bottleneck which impacts both traffic on the freeway, as well as on the river. The Oregon and Washington state departments of transportation are jointly studying how to replace the bridge. Initially, the estimated cost for a replacement bridge was around $2 billion,[11] but that number has climbed steadily to around $4.2 billion.[12]