The herald., 1895-04-09
CITY ENGINE .<EPOR1

The city engineer /, -. ted as follows:
In the matter OF the protest OF Il. l..
Horton and others against the opening OF
Byram street INTO Eleven h street, find
that the district of assessment has a
frontage OF 20.6.2 feet, majority OF
which would be 1899 feet. The protest
repre- 'ents on its face 1895 feet, but [ find
certain Irregularities which,, when consid-
cred, leave the protestants witt less than
a majority. Protest referred to the board
of public works.
In the matter of the petition of w. n.
Avery asking for change of grade at the
northwest corner OF Eighth street and
Union avenu find that the petition
represents Il majority of the frontage
which would be affected by said change.
therefore present an ordinance of inten-
ton to change and establish the grade OF
said intersection. Adopted.
Ordinance OF intention to macauamiZe
AMI gutter VITA hard porphyry rock un-
der specification No. 10 to construct a ce
ment curb and cement sidewalk on Also
street from the east curo line of Alameda
street to the west line of the offic.a bed
OF the river. Adopted
| am instructed by your body to present
an ordinance for the grading OF Twelfth
street between san Pedro and Tennessee
streets. | find that the grade of said
Twelfth street has not been estabishe /
further east than zanja No. 1. [ therefore
await further lEStructiohs III the matter.
Referred to board o. public wor S.
In the matter of your instructions to
improve Boyle avenue by curping with
cement, sldewalking AID sewering, | find
that it is impracticable to- sewer said
street as instructed by you on account of
the street grades necessltatlng the build
ing of the sewer down Boyle avenue to
Fourth street and down Fourth street to
the connection wit the Hollenbecl ar
royo aud from Sixth street north to
Fourth street, and from 3, Sixth street
south to Il connection with the Hollen
beck arroyo sewer. Referred to sewer
comm ttee.
present herewith an ordinance of in
tentiOn to grade, gravel and gutter and
construct redwood curb on St. Louis
street, under the petition of A. w. Ellis
and Others, said work to be dore under
the bond act. | herewith present an est-
mate of the probable cost OF said work
per front foot Oh each side of the said
street, which | find to be $1.20. A Adopted.
2 Ordinance of intention to construct
cement walk on Thirty-frst street be-
tween Grand avenue and Figueroa street.
Laid over for two wee $. Ordinance of
intention to grade, etc, Burlington ave-
nue. from First street to Ocean View ave-
nue., under specifications & and the bond
act. | herewith present an estimate of
the probable cost of said work per front
loOI ON eacn Slue OF SAD street. amount
ing to $1.75. Adopted.
desire to call the attention of your
honorable body to an existing custom in
this department. that may be economical
put is not efficient and leads to ve..y
grave results. Instead of giving grade
stakes Tor sewer construction reference
points are set near the line of work. bv
one OF the field parties and grade sheets
are issued to the contractor instructing
him to measure certain horizontal and
vertical distances to arrive at a proner
point, making the contractor or inspec-
tor the engineering representative Of til
department; after the work has been com
pleted and "a personal inspection By an
assistant engineer. which proves moth
ing, The city engineer certites tina: the
work was performed in accordance with
the lines and grades given by him.
say the inspection by the assistant
engineer proves nothing as to the exact
grade of the sewer, because the only wav
Of making the inspection is by going
down one manhole AID looking through
to Il tight place in another Bv this
method it is impossible to detect slight
abrupt variations in the grade of several
inches. As All illustration, ii the sewer
pipe is twelve inches in diam ter there
could be variation of five and one-half
inches from a true line and Still q ray'of
light would pass through from the light
at one manhole to the eye at the other.
Anyone who has had experience in
these matters KNOWS that unless the man
holes are very close together the interme-
diate outlines of the pipe between the eve
and the light are ros fined as on a dark
night; the Light you dett CT on distant
mountain does not outline intermediate
objects.