One hundred percent of tree material removed during the preconstruction activity was recycled or salvaged by Green Waste Recycle Yard in Richmond, California.
More than 50 native plant species, for a total of 45,000 plants, were collected in the Presidio prior to construction and are now being grown in the Presidio Nursery.
Many of the piles for the high viaduct will be 12 feet in diameter, requiring a special oscillator rig for installation of the piles. Larger, deeper piles mean fewer piles are necessary, opening views from the Presidio to the bay.
The new parkway will allow pedestrians and bicyclists to cross over or under Doyle Drive in accordance with the Presidio Trails and Bikeways Master Plan.
The new parkway will have larger 11- and 12-foot lanes to accommodate buses and provide an improved experience for drivers.
Each weekday, nearly 120,000 vehicles travel between Marin and San Francisco over the Golden Gate Bridge along Doyle Drive.
The start of construction of the Presidio Parkway was accelerated by more than a year thanks to the receipt of $50 million in federal stimulus funding.
The new parkway will improve traffic safety by including continuous shoulders for emergency and disabled vehicles.
The first set of tunnels, the Battery Tunnels, will be constructed north of the San Francisco National Cemetery and span 853 feet.
Halleck Street will be closed and temporarily removed during construction. Upon completion of the Main Post Tunnels, Halleck Street will be restored over the top of the new tunnels.
The Main Post Tunnels will be constructed north of the Main Post parade grounds. These will be the longer of the two sets of tunnels, spanning 1,017 feet.
$3.6 million went directly to small and local businesses for the project’s first preconstruction contract (tree removal and native plant and seed collection).
The new parkway will include extended bus bays on both sides of Richardson Avenue.
Seismic safety will be achieved in 2011 when traffic is transferred onto new structures and the temporary bypass adjacent to the existing facility.
A robust Disadvantaged and Small Business Enterprise Participation Program has been established to actively engage businesses throughout San Francisco, the Bay Area, and California to participate in the project.
The northbound and southbound roadways will be separated by a wide, landscaped median improving driver safety and creating a parkway feel.
Both sets of tunnels will be constructed using the cut and cover method by digging into the natural bluffs and covering the tunnels with a green pedestrian corridor.
Including a temporary bypass in the construction phasing reduced the construction duration by nearly two years.
Concrete is used more than any other man-made material in the world

Press Releases

The following documents are available in Adobe Acrobat PDF Format . If you do not currently have Adobe Acrobat software, it is available for download at no cost on the Internet.

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Title	Date	File Type/Size
Overnight Closure of Last S.F. Exit on Hwy 101, December 6	12-06-11	453kb
Overnight Closure of Last S.F. Exit on Hwy 101, Nov 30	11-29-11	453kb
Southbound Hwy 101 to Southbound Hwy 1 Ramp Closure, November 18	11-17-11	448kb
Overnight Closures of Last S.F. Exit Just Before GGB Toll Plaza, Nov 16 & 17	11-15-11	455kb
Overnight Closure of NB Hwy 1 to NB Hwy 101, November 4	11-03-11	448kb
Overnight Ramp Closures, NB and SB Hwy 1 at Hwy 101	07-14-11	442kb
Southbound Hwy 101 to Southbound Hwy 1 Closure, June 24-25	06-23-11	450kb
Presidio Parkway Project Debuts Transportation Simulator	03-15-11	422kb
Two Overnight Closures on Hwy 1 at Hwy 101 Interchange	01-05-11	456kb
Presidio Parkway Public-Private Partnership Agreement Signed	01-03-11	351kb

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