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Exhibit
99.19
CONSENT
Ladies and
Gentlemen:
The undersigned hereby
consents to (1) the references to the undersigned’s name
included or incorporated by reference in the Annual Report on Form
40-F of Denison Mines Corp. in connection with the report entitled
“Technical Report with an Updated Mineral Resource Estimate
for the Midwest Property, Northern Saskatchewan, Canada”
dated March 26, 2018, and (2) all other references to the
undersigned included or incorporated by reference in the Annual
Report on Form 40-F of Denison Mines Corp.
Dated: March 13,
2020
(Signed) “Chad Sorba”
__________________________
Chad
Sorba, P.Geo.
Denison Mines
Corp.