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Published byCayla Hampshire Modified over 10 years ago
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Lowermost Pajaro left-bank bench vegetation just downstream from Thurwatcher Bridge
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Corralitos Creek above Salsipuedes ~ 1910?
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Salsipuedes & Corralitos Junction
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Murphys Crossing: view downriver
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View upstream – big bend just west of Aromas Important flood storage area
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Probably near Aromas ~1915 view upstream
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View downstream at Aromas - quarry product spills from railroad r-o-w?
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View Downstream over Chittenden - Soda Lake Meander Scars
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Future site of Graniterock Wilson Quarry (left) - view downstream
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Railroad Bridge at Chittenden with 1906 faulting repairs USGS photo
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Upper Pajaro River joining lower San Benito River - view east
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Upper Pajaro River (right) joining San Benito River (foreground) View west (downstream)
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July 1952
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Lower San Benito - pre-mining June, 1939
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Hillsdale sand and gravel. View upriver
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Bench height 142; river bed 132; berm height 157-170 December 2000
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View upstream Hillsdale quarry. February, 2004
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View downstream Hillsdale Quarry
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Crossing berm was 13+ ft high in December, 2000
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Haul Road berm ~4-10 feet high - view south to San Juan Bautista
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Channel isolated in old spoils disposal and mining area
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Overview Dec 2000 (A = Abandoned flood plain segments) Hillsdale Quarry site - San Benito River
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Gravel skimming and stream-bed mining - view south
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Past stream-bed mining site, and present mountain-top removal site for Hillsdale plant. View northwest. Banks 10ft and stable.
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View southwest (downstream) moving up into bank cutting areas
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Lower Lucy Brown Lane reach. Bed of river here mined about 10-15 ft below grade. Left bank erodes in floods (~15 ft high)
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Lucy Brown lower reach view of right bank 15-40 ft high
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Lower Lucy Brown reach - left bank active bank cutting 20 ft high
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Bank cutting and slumping just downstream from Lucy Brown Ln - View downstream
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Bank cutting and slumping just downstream from Lucy Brown
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Slump along right bank - lower Lucy Brown stream bed mining reach
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Upper Lucy Brown Ln reach - operator shut down in 2002 View southwest of left bank 25 ft high
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Narrowest point on lower San Benito River - excavated channel
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Low berms do not protect closed plant site
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Sod Farm site - view west. Floodplains being abandoned but carried floodwater in 1995 and 1998
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Small berm protects sod farm from 1-10 yr events - view west
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Mitchell Road 1 km wide reach - flow to left
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View upstream (south). Hwy 156 bypass; and Hwy 156 commercial (background) with two sewage pond sites in historic floodplain.
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New Highway 156 bridge near Mitchell Road reach and lower pond complex protected by berms in floodplain. View north.
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USGS gauging site (rt bank) along old Hwy 156, Hollister
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Upper Hollister sewage ponds stable channel
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Same site of destroyed bridge
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Same site in summer when a temporary crossing is built View upstream
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Heavy vehicle use in channel - view downstream to Hollister
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Union Rd. bridge, view north downstream. Cienega Rd, Hollister
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Union Rd. bridge - view upstream. Banks 20-25 ft high, actively cut.
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Ditto - view downstream
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Site of Cienega Road house site where 40+ feet of bank 25 ft high was lost in 1998. View upstream to Hospital Road seasonal crossing.
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Cienega Road house site with two cutting left bank levels
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Right bank material may be mining spoils - about 20 ft high
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Basal left and right bank alluvium
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Old quarry site with berms in the channel just above Hospital Road Seasonal crossing site. Gravel processing site was upper left
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Failing banks at site of past river bed mining just downstream from Tres Pinos Creek tributary. View of right bank ~ 20 ft high.
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Natural slump (reactivated in 1995) near Tres Pinos Creek - View South
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Ditto - this is a source of gravel-sized materials - Left Bank
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Tres Pinos Quarry, Tres Pinos Ck. Right bank terrace mining; floodplain disposal
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Tres Pinos Creek, view upstream - disposal in floodplain of fine spoils
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