Why runway 13L/31R of JFK Airport does not mention any Threshold Crossing Glide Path Height for its reciprocal end? I am studying FAA's airports legacy file and its corresponding layout data. I noticed that runway 13L/31R of JFK Airport lacks a Threshold Crossing Glide Path Height, as one can also confirm from this site. Is there any "standard" value that one can apply here? Neither the official aforementioned legacy file nor any relevant website mention a Visual Glide Path Angle either.
In comparison, runway's base end mentions both a Threshold Crossing Glide Path Height (74' AGL) and a Visual Glide Path Angle (3.00 degrees).

I would be grateful if someone could point me in the right direction.
That information is shown on the approach plates



It appears that 31R is not equipped with a VGSI. At least not that I can find. That would be why the data is missing.



On 13L the GS and VGSI are both 3°, but since the VGSI is located about 300ft further down the runway than the GS antenna the TCH is higher.