Skip to main content

Former California State Route 152 east of Pacheco through the San Luis Reservoir

Dinosaur Point Road east of Pacheco Pass to the waters of the San Luis Reservoir is the original alignment of California State Route 152.  Since July 1965, California State Route 152 has been realigned east of Pacheco Pass via a modernized expressway.  The original alignment of California State Route 152 on occasion reemerges from the San Luis Reservoir at Dinosaur Point.  Pictured above as the blog cover is the original alignment of California State Route 152 at Dinosaur Point disappearing eastward into the waters of the San Luis Reservoir.  Below California State Route 152 can be seen passing through what is now the San Luis Reservoir east of Pacheco Pass on the 1935 Division of Highways Map of Merced County.


Part 1; the history of California State Route 152 east of Pacheco Pass through the San Luis Reservoir site

The present site of the San Luis Reservoir during the era of Alta California was part of Rancho San Luis Gonzaga.  Rancho San Luis Gonzaga was granted to Francisco Jose Rivera of Monterey during 1841.  Rivera ultimately never occupied Rancho San Luis Gonzaga.  During 1843 large portions of Rancho San Luis Gonzaga were granted to Juan Carlos Pacheco and Captain Jose Maria Meija.  Within days of being granted part of Rancho San Luis Gonzaga, Captain Meija would gift his share to Pacheco.  Rancho San Luis Gonzaga even by the 1840s was already a well-established crossing the Diablo Range and would come to be known as Pacheco Pass.  

An established trail over Pacheco Pass had been use by the local Yokut Tribes long before the arrival of Europeans to California.  The first documented European crossing of Pacheco Pass was made in 1805 by a party led by Spanish Army Officer Gabriel Moraga.

During the American period Andrew Firebaugh constructed a tolled stage road across Pacheco Pass to Bell Station.  Firebaugh's toll road was completed by 1857 and was part of the Butterfield Overland Mail route between 1858-1861.  A primitive path over Pacheco Pass to Gilroy can be seen on the 1857 Britton & Rey's Map of California.

The Butterfield Overland route over Pacheco Pass is touched on in the September 1950 California Highways & Public Works.   


The more established Pacheco Pass Toll Road can be seen on the 1873 Bancroft's Map of California.  In 1879 Santa Clara County and Merced County purchased the Pacheco Pass Toll Road, rebuilt it on a new grade and made it a public highway.  

The history of State Highways over Pacheco Pass begins in 1915 with the passage of the Second State Highway Bond Act.  Legislative Route Number 32 ("LRN 32") was added to the State Highway System with the following definition:

"an extension connecting the San Joaquin valley trunk line (LRN 4/Inland Route) at a point between the city of Merced in Merced County and the city of Madera in Madera County with the coast trunk line (LRN 2/Pacific Highway) at or near the city of Gilroy in Santa Clara County, through Pacheco Pass, by the most direct and practical route."

The entirety of LRN 32 between Califa and Gilroy by way of Pacheco Pass appears on the 1917 California State Automobile Map.  

According to the March/April 1951 California Highways & Public Works the State completed construction of a new alignment for LRN 32 over Pacheco Pass by 1923.   The 1923 alignment of LRN 32 was a replacement for the 1879 Santa Clara County/Merced County highway.  

  

During 1933 LRN 32 would be extended west from Gilroy via Hecker Pass to Watsonville.  The entirety of LRN 32 was announced as California State Route 152 in the August 1934 California Highways & Public Works.  


Below California State Route 152/LRN 32 can be seen passing through what is now the San Luis Reservoir east of Pacheco Pass on the 1935 Division of Highways Map of Merced County.

Plans for the construction of San Luis Dam were completed by 1961 and construction broke ground during August 1962.  The construction of San Luis Dam necessitated the relocation of California State Route 152/LRN 32 due to it being located int what was to become the San Luis Reservoir.  The relocation of California State Route 152 would see it realigned north of the planned San Luis Reservoir east from Pacheco Pass.  

The realignment of California State Route 152 north of the planned San Luis Reservoir is discussed in the July/August 1965 California Highways & Public Works.  The realignment of California State Route 152 is cited to be 12 miles in length originating from the Merced/Santa Clara County Line and extending eastward as a divided road to California State Route 207.  The new expressway alignment of California State Route 152 east of Pacheco Pass was opened via dedication ceremony on April 29th, 1965.  The San Luis Reservoir would not be completed until 1967 which would see the original alignment of California State Route 152 east from Dinosaur Point inundated.  The original alignment of California State Route 152 at Dinosaur Point became a boat launch for the San Luis Reservoir Recreation Area.   






Part 2; exploring the original alignment of California State Route 152 east from Pacheco Pass to Dinosaur Point

As modern California State Route 152 eastbound approaches Pacheco Pass in Santa Clara County the original soft transition can be seen razed to the right approaching Dinosaur Point Road.  Pacheco pass lies at an elevation of 1,368 feet above sea level. 




Below is a view looking westward via what was the original alignment of California State Route 152 at Pacheco Pass.  


Former California State Route 152 on Dinosaur Point Road east of Pacheco Pass enters Merced County and skirts the boundary of Pacheco State Park.  Pacheco State Park was created in 1997 from a 6,890-acre grant from the descendants of the Pacheco family.  





Dinosaur Point Road eastbound descends from Pacheco Pass towards the San Luis Reservoir.  Dinosaur Point Road follows the northern boundary of Pacheco State Park until passing through the gate of the San Luis Reservoir Recreation Area at Dinosaur Point.  















During instances where the water level is low in the San Luis Reservoir the former alignment of California State Route 152 can be found below the boat launch at Dinosaur Point.  The descent from Dinosaur Point eastward into the San Luis Reservoir is fairly steep which usually obscures the older alignment of California State Route 152.  First State Highway Bond Act concrete can be found underneath the eroding asphalt as the original grade of California State Route 152 disappears into the San Luis Reservoir.  


















Comments

Popular posts from this blog

Former US Route 50 and the Pioneer Route Lincoln Highway on Johnson's Pass Road

Johnson's Pass Road is one of the oldest highway corridors in California.  Johnson's Pass was part of the Lake Tahoe Wagon Road as it was completed during 1856 over the Sierra Nevada.  The pass would later be incorporated into the Pioneer Branch of the Lincoln Highway in 1913 and US Route 50 in 1926.  Johnson's Pass Road would be bypassed by a new alignment of US Route 50 over Echo Summit in 1938.  A replacement of the Meyers Grade east of Johnson's Pass would be opened to traffic in 1947.   Johnson's Pass Road remains accessible to traffic and is still signed by the Lincoln Highway Association.  Pictured as the blog cover is the view from the top of Johnson's Pass Road overlooking modern US Route 50 and Lake Tahoe.   Part 1; the history of Johnson's Pass Much of the history of what become the Lake Tahoe Wagon Road is discussed in the  September 1950 California Highways & Public Works  during its Centennial Edition.  The or...

Former US Route 50 and the South Lincoln Highway from Folsom east to Placerville

The corridor of Folsom of Sacramento County east to Placerville of El Dorado County has been a long established corridor of overland travel dating back to the California Gold Rush.  The Folsom-Placerville corridor was once part of the path of the Lake Tahoe Wagon Road which became the first California State Highway and later the South Lincoln Highway.  In time the South Lincoln Highway's surface alignment was inherited by US Route 50.  The Folsom-Placerville corridor also includes the communities of; Clarksville, Shingle Springs and El Dorado. Part 1; the history of the Lake Tahoe Wagon Road, South Lincoln Highway and US Route 50 through Folsom-Placerville Folsom is located on the American River/Lake Natoma of eastern Sacramento County.  That lands now occupied by the City of Folsom were part of Rancho Rio de los Americanos prior to the finding of gold at Sutter's Mill during 1848.  During the California Gold Rush the lands of Rancho Rio de los Americanos were p...

Angus L. Macdonald Bridge

At 1.3 kilometers (or about 0.84 miles) in length, the Angus L. Macdonald Bridge is one of two bridges crossing over the Halifax Harbour between Halifax, Nova Scotia and Dartmouth, Nova Scotia, with the other bridge being the A. Murray Mackay Bridge . Opened in 1955 and named after former Nova Scotia Premier and Canadian Minister of Defense for Naval Services Angus L. Macdonald, the Macdonald Bridge was the first bridge that crossed Halifax Harbour that was opened to traffic. The Macdonald Bridge was also the subject of the Big Lift, which was only the second time in history that the span of a suspension bridge were replaced while the bridge was open to traffic. Planning began in 2010 for the Big Lift, while construction took place between 2015 and 2017. Similar work occurred on the Lion's Gate Bridge in Vancouver, British Columbia before the project took place on the Macdonald Bridge. At this time, much of the bridge infrastructure is new, leaving only the towers, main cables and...