Bay Delta Region
Studies and Surveys
- 20mm Survey
- Fall Midwater Trawl
- Fish Salvage Monitoring
- San Francisco Bay Study
- Smelt Larva Survey
- Special Studies
- Spring Kodiak Trawl
- Striped Bass Study
- Sturgeon Study
- Townet Survey
- Zooplankton Study
- All Surveys and Studies
Other BDR Links
Main Office
2825 Cordelia Road, Suite 100
Fairfield, CA 94534
(707) 428-2002
Stockton Office
2109 Arch Airport Rd
Stockton, CA 95206
(209) 234-3420
Acting Regional Manager:
Scott Wilson
Related Programs
Delta Smelt Indices
Delta Smelt Indices
| YEAR | INDEX |
|---|---|
| 1959 | 12.1 |
| 1960 | 25.4 |
| 1961 | 21.3 |
| 1962 | 24.9 |
| 1963 | 1.8 |
| 1964 | 24.6 |
| 1965 | 6.0 |
| 1966 | |
| 1967 | |
| 1968 | |
| 1969 | 2.5 |
| 1970 | 32.5 |
| 1971 | 12.5 |
| 1972 | 11.1 |
| 1973 | 21.3 |
| 1974 | 13.0 |
| 1975 | 12.2 |
| 1976 | 50.6 |
| 1977 | 25.8 |
| 1978 | 62.5 |
| 1979 | 13.3 |
| 1980 | 15.8 |
| 1981 | 19.8 |
| 1982 | 10.7 |
| 1983 | 2.9 |
| 1984 | 1.2 |
| 1985 | 0.9 |
| 1986 | 7.9 |
| 1987 | 1.4 |
| 1988 | 1.2 |
| 1989 | 2.2 |
| 1990 | 2.2 |
| 1991 | 2.0 |
| 1992 | 2.6 |
| 1993 | 8.2 |
| 1994 | 13.0 |
| 1995 | 3.2 |
| 1996 | 11.1 |
| 1997 | 4.0 |
| 1998 | 3.3 |
| 1999 | 11.9 |
| 2000 | 8.0 |
| 2001 | 3.5 |
| 2002 | 4.7 |
| 2003 | 1.6 |
| 2004 | 2.9 |
| 2005 | 0.3 |
| 2006 | 0.4 |
| 2007 | 0.4 |
| 2008 | 0.6 |
| 2009 | 0.3 |
| 2010 | 0.8 |
| 2011 | 2.2 |
| 2012 | 0.9 |
| 2013 | 0.7 |
| 2014 | 0.5 |
| 2015 | 0 |
| 2016 | 0 |
| 2017 | 0.2 |
| 2018 | 0 |
| 2019 | 0 |
| 2020 | 0 |
| 2021 | 0 |