(i) Barrier notched on Sept. 28, 1991. Construction resumed on Oct. 10 and finished on Oct. 13. (ii) Barrier notched on Sept. 30, 1992. Construction resumed on Oct. 2 and finished on Oct. 9. (iii) Construction was delayed on 5/17 and resumed on 6/5 due to high flows. (iv) Barrier was breached on 5/ 16 on an emergency basis, but complete removal wasn't done until 9/3, after Corps demanded permit compliance of complete removal. (v) Barrier was installed in previous years. (vi) Installation delayed due to high flows. (vii) Not intalled due to high San Joaquin River flows. (viii) Not installed upon DFG's request. (ix) In 1963 and 1964 an old rock barge was intentionally flooded and sunk at the head of Old River in an experiment to see if it could serve as a temporary barrier. Results were not promising and rock was placed directly for the 1968 barrier. No barriers were in place in 1965, 1966 or 1967. (x) Flashboards adjusted to allow minimum 6-inches flow for fish passage. (xi) Spring Head of Old River not installed due to high flows in the San Joaquin River. (xii) Only above water portion of boat ramps constructed due to hgh flows. North abutment not installed until full closure of barrier. No "partial" barrier configuration for 2005. (xiii) Fall Head of Old River not installed due to favorable dissolved oxygen conditions in the San Joaquin River.