Two Fairfax County supervisors doubt recent assertions from Fort Belvoir that the regional exodus of military jobs under base realignment and closure will lessen the blow of thousands of workers arriving at Fort Belvoir.

Belvoir’s spokesman said the net 14,478 jobs leaving the national capital region by 2011 under BRAC could mitigate the damage done to Fairfax County services from the about 22,000 job holders headed to the south-county base. The arrival at Belvoir is expected to swamp roads and schools.