Alcatraz disposal site
Named in the records1967–1992
155 records of San Francisco tie this place, 1967–1992: 0 decisions of the Board of Supervisors and 155 facts read from city reports. Open the full list, with filters for years, kind and outcome.
- Kind
- Named in the records
- Records
- 155: 0 Board decisions, 155 facts from city reports
- Years
- 1967–1992
What the records say
The 60 most telling of its 155 records, in date order: the ones an editor picked first, then the highest scored. The one-line summaries were written by a language model from the printed page; open the page to check the wording.
| When | What the record says | Outcome | Source |
|---|---|---|---|
| 1967 | Alcatraz disposal site · finding: Study results represent initial distribution of sediments transported away from the site, not ultimate deposition sites | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1967 | Alcatraz disposal site · other: 53% of simulated gilsonite retained in Bay | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1972 | Alcatraz Disposal Site (SF-11) · other: designated to receive dredged material by the USCOE under Public Notice 72-61 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1973 | Alcatraz Disposal Site benthic survey · finding: S. benedicti 45.2% of population | finding | City report: Dredge disposal study San Francisco Bay and estuary : main report scanned page ↗ |
| 1975 | Alcatraz disposal site · finding: few organisms at certain times, those present opportunistic (Liu et al. 1975) | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1975 | Alcatraz disposal site · other: Annual sediment volumes released from USCOE and U.S. Navy projects, 1975 to 1985 (Fig. 9) | measure | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1975 | Alcatraz disposal site · other: largest volume of dredged material disposed, 1.9 million cubic yards annually | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1975 | Alcatraz Disposal Site (SF-11) · other: annual average of 2.2 million yd3 of dredged material received | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1975 | Alcatraz disposal site · other: about 39% of total dredged volume, average maintenance disposal | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1976 | Alcatraz disposal site · finding: USCOE monitored turbidity plumes after dredged material disposal at Alcatraz disposal site | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1976 | Alcatraz disposal site · finding: maximum turbidity immediately after disposal near substrate | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1977 | Alcatraz disposal site · other: relative dredging cost 4.8-6.2 (hopper, idealized systems dredging) | site | City report: Dredge disposal study San Francisco Bay and estuary : main report scanned page ↗ |
| 1982 | Alcatraz disposal site · finding: USCOE determined enough material had accumulated to pose a hazard to navigation | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1982 | Alcatraz disposal site · other: water depth decreased from 36.5 m to minimum of 8.5 m at MLLW due to mounding | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1982 | Alcatraz Disposal Site (SF-11) · other: disposal volumes increased, primarily due to increased dredging at Alameda Naval Air Station and Richmond Harbor | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1982 | Alcatraz disposal site · event: Dredged material failed to disperse as expected and formed a mound at the site | event | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1984 | Alcatraz disposal site · finding: Peak of dredged material mound at -8.5 m (-28 ft) MLLW, posing a threat to navigation | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1985 | Alcatraz disposal site · event: mounding occurred again; USCOE introduced additional requirements | event | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1985 | Alcatraz Disposal Site (SF-11) · other: increased disposal from new work project at Richmond Outer Harbor (3.9 million yd) | event | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: mound in northern portion of disposal site risen to about -12 m (-40 ft) | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: currents could transport 40,000 yd3 (30,000 m3) of fine sand during an average tidal cycle | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · finding: existing currents are sufficient to erode and transport fine sand and unconsolidated clays and silts | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · finding: significant dumping of consolidated clamshell dredged materials would result in mounding at the site | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Total dredged sediment discharged at Alcatraz site, 4.736 million yd3 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Dredged material from 19 maintenance projects disposed at site in 1986; 20 maintenance projects in 1987 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · finding: Average disposal volumes at Alcatraz stated on page 194 are incorrect | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · finding: Average disposal for 1986 and 1987 is 4.7 million cubic yards, not the 2.3 million reported in the text | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: 65% of material dredged disposed at Alcatraz site (1986-1987 average) | measure | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: 65% of material dredged disposed of at Alcatraz site | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: 43% of material disposed at site came from four largest dredging projects | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: About half of navigation projects using the Alcatraz site disposed 100,000 cubic yards or less annually | measure | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Ten or more disposal events occurred on 32.5% of the days | measure | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: No disposal activity on 23.7% of the days; data missing for 7.1% of days | measure | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · finding: No relationship between fishing success and monthly rates of dredged material disposal at the Alcatraz site (r² = 0.06) | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Monthly dredged material disposal plotted against recreational partyboat catch per unit effort, Block 301, Central Bay | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Dredged material disposal at Alcatraz · other: 41 barges is the maximum one-day value from available records | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz Disposal Site (SF-11) · other: 81% of dredged material disposed in SF Bay in 1986 and 1987 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz Disposal Site (SF-11) · other: Seventy percent of dredging projects in the San Francisco District utilized the Alcatraz site | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz Disposal Site (SF-11) · other: 46 projects used the Alcatraz site (1986-1987 counts) | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz Disposal Site (SF-11) · other: Four largest projects accounted for 43% of total material disposed at Alcatraz | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Distribution of dredging projects disposing at the site, by size class and total volume, 1986-1987 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: Seven new work projects disposed 35% of total material transported to the site | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: 65% of disposed material from maintenance projects | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: monthly disposal trends, maintenance and new work projects | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: no disposal on 23.7% of days, January 1986 to December 1987 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: employed for 65% of total dredged sediment, annual average about 4.7 million yd3 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1986 | Alcatraz disposal site · other: average dredged material disposal 2.2 million cubic yards per year in 1986-87 | action | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz Disposal Site · other: SAIC 1987b side-scan sonar study tracked dispersion of disposed dredged material | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz dump site · other: average downward velocity of disposed material 1.1 m/sec | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · finding: landward near-bottom residual currents measured for most hydraulic conditions near the Alcatraz disposal site | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · finding: Suspended solids in lower water column 44 to 165 mg/L | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · finding: Plumes migrated with the tide at rates up to 140 cm/s during maximum ebb and flood disposal | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · finding: Suspended solids in plumes during initial dispersion of disposed sediments similar to ~50 mg/L plume concentrations | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · other: Bulk of permittee dredged material disposed at Alcatraz (1987) | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · other: between 2 and 3 million yd3 capacity remained | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · other: about 6 million yd3 of dredged material disposed since 1987 survey | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Port of San Francisco new work dredging · other: 813,000 yd3 of new work dredging disposed at Alcatraz | action | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1987 | Alcatraz disposal site · other: Total dredged sediment discharged at Alcatraz site, 4.720 million yd3 | site | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1988 | Alcatraz disposal site · finding: Greater volumes and larger amounts of clamshell-derived dredged material disposed at Alcatraz, suggested to explain greater mounding there than at other Bay disposal sites | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
| 1988 | Alcatraz disposal site · finding: 52.5% of material deposited at Alcatraz transported away from the site | finding | City report: Status and trends report on dredging and waterway modification in the San Francisco Estuary scanned page ↗ |
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