Repairing the damage and continuing her assigned missions, she conducted her operations in the Bassac River near Cần Thơ. On 21 January 1969, while beached at Vũng Tàu and loading supplies for a routine convoy run, the ship again came under fire as VC launched a rocket barrage directed at the loading ramp and the adjacent airstrip. One rocket (122 millimeter) impacted on the fantail and exploded in the mess decks of "Tom Green County", inflicting heavy materiel damage and wounding several men in the after part of the ship. Retracting and anchoring at Vũng Tàu Bay, "Tom Green County" effected temporary repairs before being relieved by the to sail for Yokosuka and permanent repairs. On 2 February the ship made port at Yokosuka to commence a long repair period, after which she conducted support operations for an assault boat school at Numazu while undertaking independent steaming exercises. Sudden troop deployments in Vietnam resulted in a recall to Southeast Asian waters, and "Tom Green County" accordingly sailed for Vũng Tàu on 23 June. En route, the ship trained in riverine warfare tactics. "Tom Green County" relieved "Whitfield County" on 4 July 1969 at Mỹ Tho, near Dong Tam Base Camp, and spent the next six weeks supporting the operations of TF 117, as it prepared to "wrap up" its operations in the Mekong Delta region. While at Mỹ Tho and in the Delta, the ship served as a floating supply base and a transient barracks ship for members of the Army 9th Division who were being processed for stateside duty. "Tom Green County" also fired over 3,000 rounds of 3-inch/50-caliber counter-battery harassment and interdiction fire, while maintaining watch for VC swimmer-sappers who might attempt to mine the ship while she lay at anchor.