I got good news this morning! The line has been excavated and a leak has been found and repaired!
So far we don't think the valve was faulty. The leak was in the pipe next to the valve. Now we have to pressure up the system to make sure that the repair was successful. If the repairs are successful, that portion of the line will be flushed and tested. We could be ahead of schedule at this time!
Congratulations to all who are working so hard to get this problem behind us. Well done! Stay tuned!