Gray Ridge Road system, showing forks at top of ridge. The south fork goes into Sun Canyon and the north branch into Water
Canyon. 19,000 cu. yds. of rocky material have been moved at a cost of 50 cents per cu. yd. in the last 60 days. (J.B.L. -
June 21, 1908)
Water Canyon Camp. Note trails - the long tunnel starts from the bend in the canyon above the camp, and passes under the ridge
to the left, 5000 feet in length. (J.B.L. - June 21, 1908)
Gray Ridge Road and trail system, looking south from near summit. Note power transmission line - the lower line is the trail
built for preliminary construction purposes for constructing pole lines. (J.B.L. - June 21, 1908)
Work on south branch of Gray Ridge Road leading into Water Canyon. The method of work consists in drilling deep holes along
the upper side of the road, springing these holed with dynamite, then loading the cavities with black powder which breaks
and throws the rock from its original position as shown in view. (J.B.L. - June 21, 1908)
Gray Ridge Road - the main road is seen at the left-hand side of the picture and again at lower right-hand side. This road
is built from the 18 Mile House to the summit of Gray Ridge, and overcomes a rise of about 1000 feet at a maximum grade of
6 1/2 percent. (J.B.L. - June 21, 1908)
View south in Water Canyon, showing preliminary trail over Gray Point Ridge. A pipe line will be laid near this trail, connecting
with the main pipe line from Sage Canyon, and furnishing a water supply at the head of Gray Ridge Road. The main water pipe
has been built from Sage Canyon, a distance of 30 miles along the line of the aqueduct, and will furnish water for all camp
and construction purposes for this section. (J.B.L. - June 21, 1908)
Yuba River debris from hydraulic mining - these bars from 10 to 30 ft. deep and miles in length. The city of Marysville is
probably 10 ft. below the ordinary level of Yuba River.
Hydraulic levee work of Natonas Co. Note the outside toes of levee and cut-off trench in advance of sand core. A portion of
this soil is afterwards drawn over the sand core to encourage vegetation.
Marysville Levee - this is faced with cobbles. Note the growth of willows brought up to the toe of the levee. The tops of
these trees are kept cut back.
