Dynamically deployable low-visibility pneumatic cofferdam system, method and apparatus

An apparatus, comprising:

• an inflatable hermetic bag member disposed between an upper cofferdam member and a lower cofferdam member;
• and
• a plurality of resilient connection members independent of the inflatable hermetic bag member and forming an attachment between the upper cofferdam member and the lower cofferdam member, the plurality of resilient connection members configured for extension in length in tension upon air inflation of the hermetic bag member to facilitate formation of a watertight seal between the inflatable hermetic bag, the upper cofferdam member, and the lower cofferdam member.

An apparatus, comprising:

• a resilient connection member forming an attachment between an upper cofferdam member and a lower cofferdam member, the resilient connection member configured for extension in length in tension upon air inflation of an inflatable hermetic bag member disposed between the upper cofferdam member and the lower cofferdam member to facilitate formation of a watertight seal between the upper cofferdam member, the lower cofferdam member, and the inflatable hermetic bag member,
• wherein the resilient connection member is connected to at least one of the upper cofferdam member or the lower cofferdam independently of the inflatable hermetic bag member.