Task 1.2: Reposition misaligned stones in northwest wing wall.


Two adjacent stones in the northwest wing wall have moved out of position, probably due to some subsidence in the northern approach ramp. Move these stones back into their correct position to prevent them from falling out of the wall entirely. This will probably require lifting the stones above them, realigning the subject stones, then replacing the stones above them. Prompt action could avoid far more complex remedial action later.


Both sides of the northern approach have subsided enough to open large gaps in the joints.

Northwest wing wallNorthwest wing wall



Northeast wing wallNortheast wing wall


The northwest wing wall has not only subsided, a number of the stones have been pushed out of position to the point that they might fall to the ground if no action is taken.


Although the northeast wing wall has subsided, the stones have not been pushed outward. It will be sufficient to close the joints with mortar so that water infiltration will be reduced.



The views below show the two most severely displaced stones from above, on the left, and from the ground below, on the right. Remedying this situation will probably require scaffolding or propping all of the displaced stones so they will not fall, removing the baluster stones above them, and, working from the lowest displaced stone, move them back into the proper alignment and mortaring them securely.

Northwest wing wallView from the baluster above.



Northwest wing wallView from the ground below.


Accomplished by:

This task will require the services of someone skilled in working with large stones and familiar with the mortar requirements of the Secretary of the Interior’s Standards for Rehabilitation. Such a person will probably have to be a hired contractor.


Temporarily removing the top baluster stones will require machinery that can easily lift a stone weighing up to 2 tons. The County road and bridge crew will need to be involved, since they may have machinery that can lift and reposition the stones. The larger stones have indentations in their sides, peckholes, a sign of having been lifted using stone tongs.

Return to Phase 1 Summary.