The San Francisco call. [volume] (San Francisco [Calif.]) 1895-1913, 1895-09-04
WATER COMPANY'S WORK,
A Tunnel to Garry Lake Mer-
ced Surface Drainage to
the Pacific.
PROTECTION AGAINST FIRE.
Large Mains to Be Laid Under the
Streets Between Market and
Townsend.

"The Spring Valley Water Company is
doing a large amount of work, partly for
purposes of protecting the reservoirs and
partly to increase the capacity of the
works to meet the constantly growing de-
mand for water" said Chief Engineer III.
Schussler yesterday.
cit will be remembered that early in the
year the company concluded to carry out
its original plan of turning the surface
drainage of the Lake MERGED watershed
into the Pacific Ocean, thus allowing only
the subterranean supply from springs in
the bottom of the lake to feed the same.
For the purpose of carrying the surface
waters of the Colma watershed of over 1000
acres into the ocean it was necessary to
build a water-tight dam across Colma can
yon, construct masonry aqueduct $500
feet in length along the southwestern shore
of Lake MERGED and to drift tunnel 300
feet in length into the Pacific.
''This dam has been constructed of first
class concrete, and the construction of the
aqueduct has been begun, while the drift
ing of the tunnel has progressed about 700
feet from the lake and over 800 feet from
the ocean end.
when the tunnel is drifted it will be at
once lined with 12-inch arch of brick and
cement masonry.
1.-THE two districts in San Francisco
County, the surface drainage of which
flows in the direction of Lake MERGED,
and the Lake View and Ocean View dis
tricts, contain a joint area of nearly 100
acres Their population is constantly
growing, and they will therefore soon re-
quire an extensive water supply system.
Before this can be put in, however,
complete sewer system, especially as re-
CARDS the main outlet sewer to the ocean,
will have to be constructed, as otherwise
the waste and sewage from the houses
would tend to pollute the water of Lake
MERGED
Where the entire surface drainage and
sewer system, as above outlined, has been
completed and the supply OF the lake con-
fined solely to the subterranean and arte-
sian supply, it is expected that the quality
of the water in the lake will be inferior to
none on the peninsula.
1.-THE company has purchased tract OF
land near Baden station, where it proposes
to construct bridge 1900 feet long across
the swamp, thus connecting the high lands
on the west side of the valley with those
on the east. On this bridge the new 81
inch steel pipe will be laid, which conveys
the water from the San Andreas reservoir
and Hayes Valley. The bridge is being
constructed of sufficient height to allow
the biggest food waters to pass under
meath, and of sufficient width to allow the
future 44-inch Crystal Springs pipe to be
placed alongside the other.
''In order to furnish an additional water
supply to the Western Addition a 22-inch
pipe $500 feet in length will be at once laid
from the San Andreas pipe, at Ocean View,
to the new Lake MERGED pumping station,
thus enabling the company at such times
as the Lake MERGED water cannot be used
on account of muddiness or low supply to
lift the San Andreas water by means of
the Lake MERGED pumping station into the
Lake Honda reservoir.
1.-The company has done large amount
of work the past summer toward improv-
ing the ire protection of the City, es-
pecially south of Market street.
"This improvement has consisted pIin-
cipally in laying 12-inch mains on Sixth
street from Market to Townsend and con-
Meeting with all cross-streets, and particu-
larly the 30-inch pipe on Howard street,
which is the main artery for the southern
district The next 12-inch cross-pipe has
been started on Fourth street, and will run
between Market and Townsend. The same
plan will be followed on Second and Third
streets, and the southerly ends of these
cross-pipes will be connected by 6-inch
pipe to be laid along Brannan street.
"There is also improvement going on in
the fire service north of Market street, the
beginning of which was the laying of II
inch main from the pinch main on Mar
ket street along Taylor to Post and down
Post to Kearny, connecting with the
Kearny-street Pinch main.
''In addition to this the pipes OF less than
6 inches in diameter south of Market
street are rapidly being replaced by S-inch
pipes. Also a 16-inch pipe has been laid
in the neighborhood of the park, toward
Richmond, with pinch main on Haight
street a 24-inch main along Frederick
street to First street, to III street, to Seventh
avenue, where 30-inch main will con-
tinue down this avenue to the main Lake
Honda tunnel.
"a new outlet and forebay is being con-
structed at Lake Honda reservoir of much
larger dimensions than the present one,
with valves opening automatically, SO that
in case of a large sudden demand, as con-
fiagration, and the supply coming from the
San Mateo County reservoirs should be in
sufficient, the valves will turn on the sup
ply from Lake Honda reservoir, making
total of 100000 gallons"