Existing system:

$$ HPGF $1000$ kcmil copper $115$kV rated. Pipe and vault system through significantly $$hilly$$ highly developed urban environment. Installed in $1950$ with no operational issues but current and future load requires more power be supplied into the city core area. Loss power from a small local oil fired power plant will need to be replaced.

$$ Existing $6$ pipe not easily replaced must be inspected and repaired if necessary.

$$ Intervening years of construction could have created ampacity choke points.

$$ Vaults are at least $20$ long. Pipe Sweeps are $40$ft$.$ min.

$$ Original construction located pipe at nominally $48$ deep.