Adjacent projects continue
in Claremont, California
Route 30 at Monte Vista
Crews are placing 1.5 million cubic yards as fill in an existing quarry pit to serve as embankment for the freeway and Baseline Road interchange. The bridge at the center will carry Baseline Road over the new freeway alignment. Monte Vista Overcrossing is the bridge to the right. Baseline Road crosses the photo horizontally on a detoured alignment that will be removed after the bridge and new roadways are complete.
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This project is approximately 50 percent complete and is on schedule to be done in early July 2002. The scope of the project includes constructing 1.7 miles of new freeway alignment. There will be four general-use, and one HOV lane eastbound, and three general-use, and one HOV lane westbound.
In March 2001, crews finished excavating an amazing 1,500,000 cubic yards of roadway. The project includes constructing post-tensioned, cast-in-place box girder bridges
at Monte Vista Avenue, Baseline Road, and the Baseline Road on/off ramp. State right-of-way delays meant construction of Baseline Road Overcrossing could not start until March 2001. These delays will increase the project length from 14 to 21 months.
The overcrossing at Baseline Road is the critical structure to the project schedule. Work on the Baseline Ramp Bridge cannot begin until traffic is relocated from a nearby detour to cross the new bridge. Placement of the deck at Baseline Road occurred in mid September, so work is proceeding on schedule.
On other portions of the project, crews are installing a 1,300-foot-long retaining wall that is 32 feet high. It will receive a 12-inch thick, structural concrete facing, with a cobblestone architectural finish. About 10,000 lineal feet of reinforced concrete pipe storm drains of a project total of 17,000 lineal feet have been installed. Construction of the reinforced concrete box culvert at the San Antonio Wash should be finished by early October 2001.
Route 30 at Thompson Creek
Tunneling machine used to excavate and jack 60-inch pipe underneath a storm drain at Thompson Creek.
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This project is 60 percent complete, and has experienced delays related to utilities. The completion date has been extended from December 2001 to February 2002. Crews are currently paving, using materials from FCI's own batch plant two miles from the construction site.
Paving crews are using Cement-Treated Permeable Material (CTPM) on the first of five paving layers. CTPM is two-feet thick, and provides drainage where ground water is expected to rise. Normally, a drainage layer is about six-inches thick, but this area has a high water table. Crews are installing eight-inch lines of slotted pipe in the permeable layer so it can seep into the storm drains. They have several
thousand feet of pipe left to replace. The
drainage work is approximately 75 percent done.
Elsewhere, retaining walls are still under construction, and at one location crews are jacking pipe underneath the open channel of a storm drain. They are using a tunnel machine, and then pushing the 60-inch pipe through. Jacking operations will be finished by mid October.
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