Figure 3. Change in interpretation of aquifer boundaries over time. 3a. 1979 sand and gravel aquifers map (scale 1:50,000). 3b. 1985 significant aquifers map (scale 1:50,000). 3c. Current edition of significant aquifers map, published in 1999 (scale 1:24,000). Note how the interpretation of aquifer boundaries has changed as more data was collected. Note especially how the high-yield (red) areas have shrunk, representing a more conservative estimate of the potential yield of the aquifer. For a more detailed discussion, read Sand and gravel aquifer maps - A work in progress.

---

Last updated on October 6, 2005

Maine.gov | Department of Conservation | MGS Home | Site Policies