Some links you may find helpful:
The USGS Study contains good information.
Saint Paul Regional Water Services has significant experience and excess capacity in their system, which pulls water from the Mississippi. A 16″ pipe could be run four miles along Hwy 96, interconnecting their system to White Bear Lake. The have sufficient water to begin augmenting the Lake now. Other lakes are currently receiving augmentation form them. They filter the water before putting it into these lakes.
The Metropolitan Council works with regional water issues.