requirements contracts for engineering design and related services ...

e) Include the streets, parkways and expressways, within the project area, shown on either adopted final maps,
or on pending final maps, or on other maps as available for each of the sections.
f) Consider sewer(s) crossing existing or proposed expressways, parkways, subways (whether underground or
elevated), railroads, subsurface utilities, etc.; and design the sewers in coordination with the appropriate City
Departments, State, Federal, or public and private agencies having jurisdiction over these facilities.
g) Certain drainage studies related to sanitary and storm water sewers that were prepared by the Bureau of
Sewers, over the years, may include, in part, drainage data for sections included in this study. In connection with
the final design of drainage plans to be prepared under this study, it is intended to utilize the available data to their
maximum usefulness and the City will make them available for the purpose.
h) Where existing drainage plans are available for all or sections of the Project Area they shall be reviewed to
determine whether they satisfy current design criteria. If the existing drainage plans satisfy current design criteria
they shall be incorporated in the final drainage plans for this project. If the existing drainage plans do not satisfy
current design criteria, new sewers shall be designed and incorporated in the final drainage plans for this project.
i) In connection with the preparation or review of drainage plans, the Consultant shall obtain all available
preliminary studies, drawings, sketches, field data, office computations, memoranda, and any other pertinent data
from the Bureau of Sewers.
j) All existing and proposed sanitary and storm water sewers shall be shown in worksheet form on plans and
profiles. These plans and profiles shall show:
(i)
In Plan:
Both building lines of sewered street and street crossings, block lengths, all street widths, final or proposed
grades, single line for sanitary and storm water sewers and for all major utilities approximately located in
sewered street, all sewer sizes and lengths.
(ii)
In Profile:
A separate line for each curb where they are not coincident, inside top and bottom lines of sanitary and storm
water sewers, inside top elevations of sewers at all changes of size and grade, sewer crossings with inside
top elevations and clearances at point of crossing, all major utility crossings, sizes, slopes and velocities of
sewers.
(iii) These plans and profiles shall be drawn to a horizontal scale of 1 inch equals 50 feet and a vertical
scale of 1 inch equals 4 feet. These profiles shall be drawn in grid form.
k) The Consultant shall design a Drainage Plan in the currently required Bureau of Sewers format, and shall
submit the Drainage Plan to the Bureau of Sewers for review and approval. The submission shall include relevant
sewer and topographic data, and computations required by the Bureau of Sewers.
l) The Consultant shall revise the Drainage Plan in accordance with any comments received from the Bureau of
Sewers and shall reiterate the submission until approval of the Drainage Plan is obtained from the Bureau of
Sewers. The signature of the Authorized Department of Environmental Protection personnel on the Drainage
Plan shall indicate its approval.
m) The Consultant shall prepare a technical supplement to the Drainage and Grade Study and shall incorporate
this supplement as an Appendix to the Preliminary Design Report. This supplement shall include all maps,
drawings, sketches, notes, calculations, proposed grades and street systems, proposed drainage plans, and all
other information necessary for the presentation of a properly drained and graded street improvement project.
9. In evaluating the feasibility of retaining existing grades and street systems, the Consultant shall perform the
following work:
a) Conduct a profile study of all existing street grades, and compare with adopted and proposed legal grades
and with existing and proposed sewer profiles.
b) Conduct a general review of the Topographic Survey, noting the elevations of all first-floors and entrance
ways (including garage and cellar doors, cellar windows, ventilation gratings, steps, loading docks, etc.) with
respect to legal grades.
NYC Department of Design and Construction
Infrastructure, October 2012
GR-44