The electrical resistance of the 846 mile DC line
is 18 +/-
1 Ohm, or 13 mOhm/km.
There are two lines, one at
+500kV, the other at
-500kV (relative to true ground).
The current varies with demand.
The maximum is 3100 A, resulting in 3.1GW of
power.
Here is a web page with a technical description.
