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Peripheral Canal Route?

Possible route of the new peripheral canal proposal. This purely speculative diagram is based upon a series of existing Tags: control, infrastructure, speculation, water

Posted by John Bass on 08/14 at 01:26 PM • #

Peripheral Canal

A peripheral canal, formally called the Eastern Alignment Isolated Facility, is the latest preferred alternative of policy makers in California’s…

Posted by John Bass on 07/18 at 04:47 PM • #

Through-Delta Conveyance

Staten Island Tip is the site of future speculative work by the Delta National Park design team.

The diagram…

Tags: control, water
Posted by dnpadmin on 05/23 at 12:48 AM • #

Temporary Dams

The schematic and ungenerous public posture of the South Delta’s temporary barriers make them the site of future speculative work…

Posted by dnpadmin on 05/23 at 12:45 AM • #

State and Federal Aqueducts

The primary means of exporting water from the Delta are two large aqueducts.

Together, they export nearly three million…

Posted by dnpadmin on 05/23 at 12:43 AM • #

South Delta Exchange Authority

The South Delta Exchange Authority would coordinate development along the South Delta’s sloughs and Old and Middle Rivers.

The…

Posted by John Bass on 05/23 at 12:42 AM • #

Setback Levee

A setback levee is an example of political consensus embodied in the performance of a hybrid form—reflecting the value of…

Posted by dnpadmin on 05/23 at 12:20 AM • #

Schwarzenegger Letter

October 29, 2003 letter from Governor Schwarzenegger to Sen. Dianne Feinstein encouraging the reauthorization of CALFED, the bureaucracy charged with…

Posted by dnpadmin on 05/23 at 12:19 AM • #

Saline Lands Exchange Authority

The Saline Lands Exchange Authority would coordinate development at the Delta’s western end.

Landowners in the western end of…

Posted by dnpadmin on 05/22 at 11:48 PM • #

Mandeville Claims

This image describes the physical consequences of several types of reclamation.

For the big land development companies who built…

Posted by dnpadmin on 05/22 at 11:41 PM • #

Flood History

One of the consequences of Delta reclamation is that the land created there is subject to the threat of flooding.…

Posted by dnpadmin on 05/22 at 11:31 PM • #

Delta Cross Channel

The Delta Cross Channel, constructed in 1951, is the critical element of water redistribution infrastructure in the North Delta.

Posted by dnpadmin on 05/22 at 11:19 PM • #

Confused Fish

Diagram describing the altered movement of fish in the Delta.

Fish confused by the pull of the water project…

Posted by dnpadmin on 05/22 at 11:11 PM • #

Images

Jones Tract flood

Jones Tract flood

View of Jones Tract flood, taken several months after flood occurred. They were still pumping.

Setback levee diagram

Setback levee diagram

Diagram shows the basic features of a setback levee and compares it to a conventional levee.

Possible peripheral canal route?

Possible peripheral canal route?

Purely a speculative diagram, this route would take economic advantage of a number of “borrow pits,” so-called because they were created to provide fill for the construction of I-5. The pits are similar in dimension to the proposed “isolated conveyance facility.” Most are now riparian habitats, and some are protected wildlife preserves. The diagram also shows how the siphon infrastructure at intersecting rivers and sloughs could be designed to “freshen” the Delta’s waterways, improving Delta water quality and ecosystem health.

Blind Monks and an Elephant

Blind Monks and an Elephant

Isolated facility - eastern alignment alternative

Isolated facility - eastern alignment alternative

The Eastern Alignment Isolated Facility is the latest preferred alternative of the planners of the ongoing crisis in California’s contentious debate over Delta water export.

Two components comprise the facility—The Eastern Alignment Isolated Conveyance Component, and Through-Delta improvements. The proposed EAIC would have 1/ a 41-mile canal skirting the eastern edge of the Delta; 2/ an intake facility near hood that would divert up to 15,000 cfs out of the Sacramento River before entering the Delta; 3/ 8 siphons over rivers and sloughs; 4/ 3 culverts under sloughs; 5/ 18 bridges over state highways and roads; 6/ 2 rail bridges

The through-Delta improvements would include: 1/ 75 miles of retrofitted setback levees; 2/ 60 miles dredged rivers and sloughs; 3/ barriers at Old River, Connection Slough and Woodward Canal; 4/ a siphon at old river to direct water to clifton court forebay.

Jones Tract levee breach

Jones Tract levee breach

2004 Jones Tract levee breach that led to the flooding of thousands of acres of farmland.

Windfarm

Windfarm

The Altamont Pass windfarm.

Water Project Aqueduct

Water Project Aqueduct

State and federal aqueducts supply northern California water to the southern half of the state. This supply will increase as a percentage of total supply due to decrease export from the Colorado River.

Water Hyacinth, Trapper Slough

Water Hyacinth, Trapper Slough

Water hyacinth was introduced to the Delta as an ornamental plant. It is aggressive, and has filled or partially filled several sloughs, making them impassable. The dense, mat-like cover also cuts off sunlight to the water below, affecting plants and animals living there.

Water above land

Water above land

Photograph showing the typical, inverted relationship between land and water in the Delta.

Temporary barrier locations

Temporary barrier locations

South delta temporary barriers resolve conflicts between water quality and environmental advocates. Barriers similar to this one are a key component of the Peripheral Canal proposal, and are the sites of future speculative work by the DNP design team.

Schwarzenegger Letter

Schwarzenegger Letter

October 2003 letter from Governor Schwarzenegger to Sen. Feinstein encouraging the reauthorization of Cal-Fed, the bureacracy charged with overseeing the future of the Delta.

Sartini Manor - Farm Labor Housing

Sartini Manor - Farm Labor Housing

State-run farm workers’ camp near Thornton.

Saline Lands Exchange Authority

Saline Lands Exchange Authority

Land at the western edge of the Delta is subject to higher water salinity levels because of the proximity to San Francisco Bay. Controlling salinity is a major task for state and federal agencies.

River Islands development plan

River Islands development plan

River Islands is a development proposed for Stewart Tract in the southeast Delta. It would build a new community protected by a “super levee.”  This new levee is seen by adjacent landowners as a breach in the long-standing agreement to build levees to the same height, thereby ensuring that all would share equally in the risk of flooding. If realized, River Islands would set a new precedent for in-Delta suburban development.

Mandeville Island Bridge

Mandeville Island Bridge

This bridge provides access to Mandeville Island, owned by the Tuscany Research Institute. The island was previously owned by Steve Wynn, Las Vegas casino magnate and duck hunter. The bridge, like other bridges and ferries scattered throughout the Delta, is private and crossing it requires permission of the owner of Mandeville Island, not easily acquired.

Delta Cross Channel sluice gate

Delta Cross Channel sluice gate

The Delta Cross Channel sluice gate in its lowered position. The Cross Channel allows water to be redirected toward the water project pumps.

Levee Urbanism Guarded Dam

Levee Urbanism Guarded Dam

Temporary dam, head of Middle River. These important elements of infrastructure are typically un-public, and are opportunities for future work by the DNP design team.

Levee Section Diagram - Land, Levee and Water

Levee Section Diagram - Land, Levee and Water

This photomontage describes the predicament that the Delta’s physical form puts those who are responsible for its future. Note the height of the land relative to the water.

Levee comparison, typical vs setback

Levee comparison, typical vs setback

Typical levee on top, setback levee on bottom. Setback levees resolve conflicts between flood control, environmental, and water supply interests.

Large property owners

Large property owners

Mandeville, Bacon, Venice, Staten, and Bouldin Islands are all owned by a single family or corporation.

Large Owner Axis Topography

Large Owner Axis Topography

Most of the Large Owner Axis land is below sea level. Note how the middle of the Axis is lowest in elevation.

Large Owner Axis

Large Owner Axis

Large Owner Axis diagram showing past or present island owners and their source of wealth. The Large Owner Axis is a chain of islands that connect the two most important elements of the Delta’s water redistribution infrastructure.

The LOA is also the key axis of planned “through-Delta” water redistribution infrastructure proposals, whether or not these improvements are tied to the new Peripheral Canal proposal.

Jones Tract flood access issues

Jones Tract flood access issues

View of Jones Tract flood, looking toward the flooded Bacon Island Road, which provides the only road access to Bacon Island.

Jones Tract flood

Jones Tract flood

Photograph showing the extent of the 2004 Jones Tract flood, which covered 10,000 acres.

Invasive Species

Invasive Species

Diagram showing water systems surrounding and within the delta islands. Farmers must pump constantly to maintain optimal water levels in their fields. The electricity required to power the pumps is expensive, and is making the Delta increasingly unable to compete in the global market for agricultural products.

Fishing, bridge and pump

Fishing, bridge and pump

Fishing among infrastructure in the Delta.

Delta Wetlands Project pumps

Delta Wetlands Project pumps

Engineering diagrams of the massive pumping systems required by the Delta Wetlands Project.

Delta Wetlands Project islands overview

Delta Wetlands Project islands overview

Bouldin Island, Webb Tract, Holland Tract, and Bacon Island are the four islands that comprise the Delta Wetlands Project.

Delta Wetlands Project islands

Delta Wetlands Project islands

Left to right: Holland Tract, Bacon Island, Bouldin Island, and Webb Tract. 20,000 acres, evenly split between profit-generating

Delta watershed

Delta watershed

The entire central valley drains into the Delta.

Delta water structure

Delta water structure

Diagram showing water systems in a part of the Delta.

Delta Primary and Secondary Zones

Delta Primary and Secondary Zones

The primary and secondary zones regulate land use in the Delta. The primary zone strictly limits uses to those associated with agriculture, and the secondary zone allows uses more loosely associated with agriculture. The secondary zone is the site of many creative interpretations of agricultural uses.

Delta Topography

Delta Topography

Darker colors indicate lower elevation to -15’ below sea level.

Delta flood occurrence since 1900

Delta flood occurrence since 1900

Delta flood history

Delta flood history

Diagram describing the history of delta island floods. Darker gray represents more flood events, with a maximum number of nine.

Delta Cross Channel Sluice Gate

Delta Cross Channel Sluice Gate

Delta Cross Channel gates

Delta Cross Channel gates

A view of the Cross Channel gates, shown in their closed position. The Delta Cross Channel is located in the north Delta between the historic towns of Locke and Walnut Grove, and is currently the most important element of the delta water redistribution infrastructure that is not a pump or an aqueduct.

Confused fish

Confused fish

Diagram describing how fish confused by the pull of State and Federal Water Project pumping are captured and trucked back to a part of the Delta where downstream is not affected by pumps.

Captured Sloughs

Captured Sloughs

During the historical period of reclamation, land development companies often filled in waterways to create larger tracts of land. Many of these can clearly be seen in aerial photographs.

CALFED Temporary Barrier Locations

CALFED Temporary Barrier Locations

CALFED diagram showing the locations of the temporary barriers. These need to be programmed for recreational use.

CALFED Staten Island setbacks proposal - ‘choke point 1’

CALFED Staten Island setbacks proposal - ‘choke point 1’

CALFED proposal to reengineer levees around the top of Staten Island, a notorious Delta ‘choke point.’

CALFED “Through-Delta” Proposal

CALFED “Through-Delta” Proposal

One of CALFED’s scenarios calls for levee improvements through the center of the Delta linking the Delta Cross Channel to the Pumps. This territory coincides with the Large Owner Axis and the Delta Wetlands Project.

Boil Chimney

Boil Chimney

A ‘boil’ is the name for a leak that comes up under a levee and appears at its toe on the land side. A boil chimney is built around a leak in the inner levee wall. A ring sandbags is raised around the leak until the water pressure is equalized.

Borrow Pit Edge - Ground Leveling Precision

Borrow Pit Edge - Ground Leveling Precision

Edge of fields in the Borrow Pit Exchange Authority. Right to left is field edge, toe ditch, (riparian) levee bank and levee crest, the constituent elements of the Delta’s levee infrastructure.

Mokelumne Pipes

Mokelumne Pipes

These pipes take water from the Mokelumne River across the Delta to Contra Costa county. Note how much the ground has subsided from the pile caps since construction.

Video

1980s Peripheral Canal argument1980s Peripheral Canal argument
Tom Zuckerman on the peripheral canalTom Zuckerman on the peripheral canal

Other

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