eVAL - multiple administrators at same building can see summary for all teachers at that site

When you log into eVAL, and look at the Observation Dashboard, in the upper left corner, under Observation Sessions but above the column of teachers there's a "Filter" drop down, which is probably set to "Assigned Teachers Only"

Click it, and choose "All Teachers" and you should see all of the teachers at your site.

Here's an important note from the eVAL support desk:  

The evaluators won’t be able to add to each other’s observations, though they can each create their own for the same teacher. Each evaluator can view what the other has done by going to the Summary page and clicking on Build/View Report for the teacher.