1772 - First recorded sighting of Delta by Fray Juan Crespi and Captain Pedro Farges

1776 - San Carlos -first ship to enter San Francisco Bay

1849 - Settlers begin arriving in the Delta to farm its rich soils while others pass through on their way to strike gold in the Sierra foothills. Transportation is by boat, using the Old Sacramento River and/or Steamboat Slough, depending on the season and water levels.  The town of Rio Vista begins to be built at the south confluence of Steamboat and Cache Sloughs, just north of the Old Sacramento River, at the location of the Ashley Ferry landing to Ryer Island.

1850 - Congress passes the Federal Swamp and Overflow Act, which provided for the title of wetlands to be transferred from the Federal Government to the states.

1861 - California Legislature authorizes the Reclamation District Act, allowing drainage of Delta lands and construction of sturdier levees.  One of the first waterway improvements in in California, completed by an agency that later became the US Army Corps of Engineers, was to create a very sturdy wood with metal bracing sea wall at the north end of Steamboat Slough so the steamboats coming down the Sacramento River could nose up to the sea wall, tie off and swing their stern around so that the vessel was heading into Steamboat Slough, and then go ahead and untie to go on their merry way.

1862 - Book about the wonderful scenes in California is published by English traveler James M. Hutchings.  He includes a section about taking a paddle wheel steam engine ride on the Antelope up Steamboat Slough to Sacramento.  He also describes the abundance of fish, such as salmon, and the methods used to catch them...simply put out a net and pull it in!

1869 - Sherman Island is the site of the first coordinated levee system in the Delta.

1879 - Prized by fishermen, the striped bass is brought by rail from the East Coast to the Delta. Two more shipments are required before the fish is established.

1880 - Most of the Delta is reclaimed using dredges developed to build levees quickly and inexpensively. By 1930, all but minor areas of swampland had been leveed and were being farmed.

1884 - Federal Circuit Court decision in Woodruff v. North Bloomfield, et al., requires termination of mining-debris discharges into California rivers. Hydraulic mining had deposited tons of silt and sand in Delta channels and upstream rivers.

1900 - California's population is estimated at 1.5 million.

1902 - Congress passes the Reclamation Act for development of irrigated lands in the western United States.

1911 - The Reclamation Board is created by the California Legislature to implement a comprehensive flood-control plan for the Sacramento and San Joaquin rivers.

1914 - California Legislature passes bill to revise water-right law regarding appropriation of surface water.

1930 - State completes comprehensive investigation of Delta salinity and its control, and the State Water Plan (now the Central Valley Project) to transfer Northern California water throughout the Central Valley.

1933 - Corps of Engineers dredges Stockton Deep Water Ship Channel to Port of Stockton.

- Congress authorizes the Central Valley Project (CVP).

1940 - Export of Delta water begins with U.S. Bureau of Reclamation (USBR) completion of the Contra Costa Canal, the first unit of the CVP.

1944 - Shasta Dam and Reservoir is completed as a key feature of the CVP; adds water to Delta channels during low-flow periods, thereby limiting salinity intrusion.

1951 - Delta export increases with completion of the Delta-Mendota Canal, another unit of the CVP.

- USBR constructs the Delta Cross Channel to aid in transferring water from the Sacramento River across the Delta to the Tracy Pumping Plant, which serves the Delta Mendota Canal.

1959 - State Legislature passes the Delta Protection Act and the Burns-Porter Act to assist in financing the State Water Project, including Delta facilities. The SWP, which would increase Delta exports, was approved by California voters in 1960.

1960 - California voters approve the Burns-Porter Act (also called the State Water Project Development Bond Act) authorizing the sale of $1.75 billion of general obligation bonds to help finance the SWP. California's population is 15.7 million.

1963 - Corps of Engineers dredges the Sacramento Deep Water Channel to the port of Sacramento.

1965 - Interagency Delta Committee, formed in 1961, completed its report recommending various Delta facilities, including the Peripheral Canal, to offset adverse effects of increasing Delta exports.

1967 - Oroville Dam and Reservoir is completed as a key feature of the SWP, and the Feather River Fish Hatchery is opened to replace spawning areas lost as a result of the dam.

- The first stage of the Harvey O. Banks Delta Pumping Plant is completed along with the John E. Skinner Fish Facility.

1971 - State Water Resources Control Board (SWRCB) adopts its Delta Water Rights Decision 1379 establishing Delta water quality standards to be met by the Central Valley Project (CVP) and SWP.

1973 - California Aqueduct completed to Southern California.

- Legislature passes Senate Bill 541 (also known as the Way Bill) to provide State financial assistance for maintenance and improvement of certain Delta levees.

- Delta Environmental Advisory Committee (DEAC) concludes that a federal-State Peripheral Canal, properly designed and operated, is necessary to protect the Delta. 1978 SWRCB issues Water Right Decision 1485 updating Delta water-quality standards and establishing water-quality standards for Suisun Marsh.

1980 - State Legislature passes Senate Bill 200 specifying the Peripheral Canal as the Delta water-transfer facility, requiring staged construction and fish-screen testing but without requiring federal participation.

1982 - California voters defeat Proposition 9, which includes the Peripheral Canal, the SB 200 package of statewide facilities, and Delta protection, by a 3-2 margin. 1986 Congress passes DWR and USBR historic accord, the CVP-SWP Coordinated Operation Agreement.

- California Supreme Court affirms State Court of Appeal ruling (Racanelli Decision) strengthening SWRCB powers to protect the Bay/Delta system. The Racanelli Decision covered eight cases challenging SWRCB's Decision 1485, issued in 1978, and its Water Quality Control Plan for the Delta and Suisun Marsh. The decision recognizes SWRCB's broad authority and discretion over water rights and water-quality issues, including jurisdiction over the federal CVP.

- DWR and the Department of Fish and Game sign the Delta Pumping Plant fishery mitigation agreement for direct fish loss.

1987 - DWR installs Middle River Weir as part of an agreement with the South Delta Water Agency to improve water conditions for local agricultural diverters. It is the first component of a temporary program designed to provide data for a more permanent solution.

1988 - DWR completes pumping plant for North Bay Aqueduct and the Suisun Marsh salinity-control gates.

1988 - Legislature passes Senate Bill 34, which provides $120 million over a l0-year period for DWR to rebuild Delta levees, enlarge channels, and help reclamation districts make levee improvements.

- An engineering study by the California Urban Water Agencies examines options for improving drinking water quality for users of Delta water.

1990 - California's population is now 29.8 million. (1990, U.S. Census)

1991 - Construction completed on four additional pumping units at the Banks Pumping Plant.

1992 - The Legislature passes the Delta Protection Act of 1992 establishing the Delta Protection Commission. The commission is to develop a comprehensive, long-term resources management plan for the Delta by July 1, 1994.

- Congress passes the Central Valley Project Improvement Act (PL 102-575), which allows water transfers from CVP contractors to other water users, reforms water pricing, and commits up to 800,000 acre-feet annually to fish and wildlife purposes.

- Governor establishes Bay-Delta Oversight Committee for long-term Delta planning.

1993 - The Delta Smelt is listed as a threatened species, and actions are defined (such as pulse flows on the Sacramento River and limitations on certain flows within the Delta) to improve conditions for the smelt and the winter-run salmon.

2000 - Salmon, striper and Delta Smelt populations are in decline according to F&G estimates.  One of the growing problems is the invasion of non-native species of water plants or weeds beginning to clog the delta waterways.  Another problem is the introduction of a non-native crab that is aggressively eating the native clams and crawdads thereby removing the natural food sources for the native fish.

Southern California looses at least 15% of its water rights from the Colorado River, so farmers and communities begin to ask for additional water resources from the Delta system.

2001- DWR begins requiring marinas, campgrounds, resorts and restaurants in the Delta area (and all over California) to chlorinate their wells to provide "safe" drinking water.  However, no consideration is made for the effects to the ecosystem from all the chlorinated water runoff assumed as a result of the new requirements.

2004 - After years of legal battles with environmental groups, Department of Boating and Waterways is finally allowed to treat Delta waterways in an attempt to eradicate plant species that are clogging the waterways and are not original area vegetation. 

2005 - Due to numerous floods from levee breaks in Louisiana caused by Hurricanes Katrina and Rita, California begins to refocus on the condition of the deteriorating levees of the Delta region.  Many bills, bonds and other proposals are put before the legislature.