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Delta Maps

Delta Levee Conditions Maps

DWR maps provide snapshot of levee conditions

The Department of Water Resources (DWR) has provided to the Delta Stewardship Council (DSC) maps and other information relating to the existing conditions of Delta levees. This information includes maps constructed by DWR indicating its best estimate of levee miles conforming to existing levee guidance and standards. In the interest of transparency, the DSC is making this information publically available on its website.

Two large area maps are provided for public viewing. One map portrays a Delta-wide view of percentage of compliance with FEMA’s Hazard Mitigation Plan (HMP) guidance, by individual island. The second map portrays a Delta-wide view of percentage of compliance with the US Army Corps of Engineer’s PL 84-99 standard, by individual island. 93 individual island maps portraying levee status and construction activity are posted further down on this web page.

In addition to the maps provided, DWR has also provided supporting information, including transmittal documents, data summary tables, analytical assumptions and limitations, and disclaimers relating to the submitted information. We recommend that viewers of these map products read the accompanying materials to best understand the context and conditions under which DWR developed these items.

The Delta Stewardship Council makes no warranties, representations or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the data provided by DWR, nor accepts or assumes any liability arising from any incorrect, incomplete or misleading data. This data has not been reviewed or approved by the Council and is considered preliminary and tentative warranting future analysis and final decision-making support. Inquiries regarding the content of this information should be directed to DWR.

  1. Memorandum; “Status of Levee Heights for Delta Islands”, January 19, 2012, Dave Mraz, DWR to Joe Grindstaff, DSC.
  2. Delta-Wide HMP Compliance Map.
  3. Delta-Wide PL84-99 Compliance Map.
  4. Detailed Classification Summary Table
  5. Transmittal Document
  6. Delta Levee Classification Analysis Assumptions and Limitations
  7. Disclaimer

DWR makes no warranties, representations or guarantees either expressed or implied, as to the completeness, accuracy or correctness of the data, nor accepts or assumes any liability arising from any incorrect, incomplete or misleading data as interpreted by Requestor and/or its agents. Requester acknowledges that this data has not been completely reviewed and approved by DWR and is considered preliminary and tentative for future analysis and final decision?making support. Note that the numbers noted on each island refer to the Levee Maintaining Agency (LMA) numerical designation.

Individual Island Maps

After reviewing the LMA numerical designations on the Delta-Wide Compliance Maps above, locate and click on the corresponding number below to access a close-up map of each individual island.

  1. RD 1 Union East Island
  2. RD 2 Union West Island
  3. RD 3 Grand Island
  4. RD 17 Mossdale
  5. RD 38 Staten Island
  6. RD 150 Merritt Island
  7. RD 307 Lisbon Island
  8. RD 341 Sherman Island
  9. RD 348 New Hope Tract
  10. RD 349 Sutter Island
  11. RD 369 Libby McNeil
  12. RD 403 Rough and Ready Island
  13. RD 404 Boggs Tract
  14. RD 501 Ryer Island
  15. RD 524 Middle Roberts Island
  16. RD 536 Egbert Tract
  17. RD 544 Upper Roberts Island
  18. RD 548 Terminous Tract
  19. RD 551 Pearson District
  20. RD 554 Walnut Grove
  21. RD 556 Upper Andrus Island
  22. RD 563 Tyler Island
  23. RD 684 Lower Roberts Island
  24. RD 755 Randall
  25. RD 756 Bouldin Island
  26. RD 765 Glide District
  27. RD 773 Fabian Tract
  28. RD 799 Hotchkiss Tract
  29. RD 800 Byron Tract
  30. RD 813 Ehrheardt Club
  31. RD 828 Weber Tract
  32. RD 830 Jersey Islane
  33. RD 999 Netherlands
  34. RD 1002 Glanville Tract
  35. RD 1007 Pico-Naglee
  36. RD 1601 Twitchell Island
  37. RD 1607 Van Sickle Island
  38. RD 1608 Lincoln Village West
  39. RD 1614 Smith Tract
  40. RD 1667 Prospect Island
  41. RD 2023 Venice Island
  42. RD 2024 Palm Orwood Tract
  43. RD 2025 Holland Tract
  44. RD 2026 Webb Tract
  45. RD 2027 Mandeville Island
  46. RD 2028 Bacon Island
  47. RD 2029 Empire Tract
  48. RD 2030 McDonald Island
  49. RD 2033 Brack Tract
  50. RD 2037 Rindge Tract
  51. RD 2038 Lower Jones Tract
  52. RD 2039 Upper Jones Tract
  53. RD 2040 Victoria Island
  54. RD 2041 Medford Island
  55. RD 2042 Bishop Tract
  56. RD 2044 King Island
  57. RD 2058 Pescadero District
  58. RD 2059 Bradford Island
  59. RD 2060 Hastings Tract
  60. RD 2062 Stewart Tract
  61. RD 2064 River Junction
  62. RD 2065 Veale Tract
  63. RD 2068 Yolano
  64. RD 2072 Woodward Island
  65. RD 2074 Sargent Barnhart Tract
  66. RD 2084 Little Egbert Tract
  67. RD 2086 Canal Ranch
  68. RD 2089 Stark Tract
  69. RD 2090 Quimby Island
  70. RD 2093 Liberty Island
  71. RD 2094 Walthall
  72. RD 2095 Paradise Junction
  73. RD 2096 Wetherbee Lake
  74. RD 2098 Cache Haas Area
  75. RD 2104 Peters Pocket
  76. RD 2107 Mossdale Island
  77. RD 2110 McCormack-Williamson Tract
  78. RD 2111 Deadhorse Island
  79. RD 2113 Fay Island
  80. RD 2114 Rio Blanco Tract
  81. RD 2115 Shima Tract
  82. RD 2116 Holt
  83. RD 2117 Coney Island
  84. RD 2119 Wright-Elmwood Tract
  85. RD 2122 Winter Island
  86. RD 2126 Atlas Tract
  87. RD 2137 Dutch Slough
  88. BALMD Brannan-Andrus Island
  89. BIMID Bethel Island
  90. Drexler Pocket
  91. Drexler Tract
  92. Shin Kee Tract
  93. Tract Near Rio Vista

Laminated Placemat Materials

  1. DSC Tabloid Size Map of the Legal Delta
  2. Water Education Foundation Delta Organizational Map

Coequal goals

The Delta Stewardship Council was created in legislation to achieve the state mandated coequal goals for the Delta. "'Coequal goals' means the two goals of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem. The coequal goals shall be achieved in a manner that protects and enhances the unique cultural, recreational, natural resource, and agricultural values of the Delta as an evolving place." (CA Water Code §85054)