Evening journal., 1891-01-09
eNelNeeRINe ANn SURVEYING.
c hief Boughman's Annual Report of the
Work Of His Department.

! C hief Boughman's Annual Report of the
Work Of His Department.
The twentieth annual report Of the
chief engineer Of the City Engineering
and Surveying Department was pre-
| sentsd TO City Council last night by
Chief Engineer George II. Boughman.
| 1t is voluminous document, containing
much valuable information and many
suggestions. In part he says:
'sThe force employed In the
department during the year has con
sisted of from five 20 ten members The
| fees received by the department and
paid to the city treasurer, 81. .05475, to
the credit Of the mayor and Council. and
| $3.50 % to the credit of the Board OF
Directors Of the Street and Sewer De.
partment amounted to 81 1874.
'Since the organization Of the depart
ment in 1871 lines have been marked for
T.5l0 buildings. In 1890 the number was
400, a decrease Of 100 when compared with
1889. The rainfall for the year was 40 45
inches
''This statement shows the number Of
transfers Of city property filed and
registered during the year Of 1890:
Original entries, 516; transfers, 9i1 not
entered 100; total, 1,557 Total for 1889
1902. Number of lots fled TO January l,
1891, 23, 793
Intercepting Sewer.
"The most important work in which
the department has been engaged during
the past year. is the designing and con-
struction of the Brandywine intercepting
sewer As early as 1888 an intercepting
sewer was proposed In march, 1890 John
Jacoby Of Bridgeport, Conn was awarded
the contract, his bid being $40 4t6 40. The
work was TO be completed November /,
1890. Ground was broken April -, and
the work at the present date Is not quite
| finished. All obstacles known to sewer
building were encountered, there being
about A. $50 cubic yards of hard granite
rock removed from the trench. The
total cost of the Brandywine sewer to
date amounts to $48 026 OF. Total
length in feet constructed to date.
$50. 30 feet; cost per foot In length,
IS. %; cost of engineering and superin-
tendance per foot, 35 ITO cents; total
length vet to be constructed by contrae-
tor, 956 feet Total probable cost of
that portion yet to be constructed By
contract, $S,279; total probable cost of
intorcepting sewer. $54, 305 01
"The length of sewers constructed and
acquired by the Board of Directors of the
Street and Sewer Department from April
&c. 1887, to January /, 1890. is 81, 139
feet. Public sewers constructed and
acquired by the Street and Sewer Depart
ment during the year ending January 1,
| 1891. 49, 504 feet, total cost $6S 675 IA
Summary of sewer work done by the city
Of Wilmington previous to January l.
| 1891 cost of sewer work from 1887 to
1891, $99, 775.77. receipts from sewers
between April 30. 1887 and January /,
1891. Sl1.2772A,
Carroll Ph. Rassett's Report
The following is taken from the accom-
panying report of Carroll Phi Bsssett NJ.
A. s. G. e, OF Newark, N. j., who
planned the BrandYwine intercepting
sewer:
'The conditions as have found them
may be outlined as follows: The Brandy
wine creek, with an approximate aver
age dry-weather flow Of ITO, ,O0O. 600
| gallons per diem), flows along the foot Of
the north slope under consideration. for
approximate 1900 feet; the district
under consideration includes approxi-
mately 925 acres and is at present occu-
| pied by a population Of 10, 600
4 8
part of the district. near the foot OF
French street, the pumping station Of
the city water works is located and
draws its wster from a race extending
4.700 feet along the south side Of she
Brandywine to dam about opposite the
foot of Broome street. Below Van Buren
street much surface drainage found its
way into this race, from which the city
water supply is taken. One of the prime
objects of the construction of the pro
posed sewer was to relieve the race and
the water supply frem pollution.
He follows this statement by showing
the number of gallons Of water the sewer
will have to carry off every day, and
| places it at 3, 100. 600 gallons. He bases
this calculation upon the assumption that
the $50 acres in the district, avail
able for houses and population, will
eventually be occupied by az average OF
| 30 people per acre or a total of 81 900 on
the entire district he allows the average
daily flow of water per individual con-
sumption and waste at 100 gallons