Page 4 - jdrogers2017ab
P. 4

Minimal Abutment



                                                                     Excavation 1924-25








































                                                    • Views at left show the left abutment

                                                         excavation into the Pelona Schist –
                                                         between 6 and 15 ft deep.


                                                    • Excavation of the schist and
                                                         conglomerate on the right abutment

                                                         averaged only about 4 ft deep.
   1   2   3   4   5   6   7   8   9