2 Chronicles 32:30

30 It was Hezekiah who blocked the upper outlet of the Gihon spring and channeled the water down to the west side of the City of David. He succeeded in everything he undertook.

Read 2 Chronicles 32:30 Using Other Translations

This same Hezekiah also stopped the upper watercourse of Gihon, and brought it straight down to the west side of the city of David. And Hezekiah prospered in all his works.
This same Hezekiah closed the upper outlet of the waters of Gihon and directed them down to the west side of the city of David. And Hezekiah prospered in all his works.
He blocked up the upper spring of Gihon and brought the water down through a tunnel to the west side of the City of David. And so he succeeded in everything he did.

What does 2 Chronicles 32:30 mean?

John Gill's Exposition of the Bible
2 Chronicles 32:30

This same Hezekiah also stopped the upper water course of
Gihon
Which Procopius Gazeus says was the same with Siloam, and which it seems had two streams, and this was the upper one; Mr. Maundrell says F3, the pool of Gihon

``lies about two furlongs without Bethlehem gate westward; it is a stately pool, one hundred and six paces long, and sixty seven broad, and lined with wall and plaster, and was, when we were there, well stored with water:''

and brought it straight down to the west side of the city of David;
through canals under the plain of the city of David; as the Targum, by a subterraneous passage; and Siloam, as Dr. Lightfoot F4 observes from Josephus, was behind the west wall, not far from the corner that pointed toward the southwest:

and Hezekiah prospered in all his works;
natural, civil, and religious, ( 2 Chronicles 31:21 ) .


FOOTNOTES:

F3 Journey from Aleppo p. 108.
F4 Chorograph. in John, c. 5. sect. 2.
California - Do Not Sell My Personal Information  California - CCPA Notice