requirements contracts for engineering design and related services ...

(ii)
(iii)
Revising the location of sewer outfalls and/or adding additional outfalls
Revising the location of discharge points for proposed sewers to existing sewers
3. The Consultant shall prepare and submit a DRAINAGE PLAN GRADE IMPACTS AND GRADE IMPACTS
MITIGATION STUDY REPORT to the Commissioner. The report shall:
(a) Identify the impacts, if any, of proposed sewers on street grades and adjacent properties and City owned facilities.
(b) Recommend feasible modifications to proposed sewer elevations, grades and sewer cross sections (size/shape) that
may be implemented to mitigate street grade and property impacts.
(c) If necessary, identify alternative mitigation measures that may be studied to determine their feasibility.
(d) Include cross sections, photographs, and other graphic details as needed to show impacts/issues/concerns that have
been identified.
(e) Identify private properties that will be adversely impacted by the proposed sewers and the nature of such impacts.
4. The Commissioner will review and, in consultation with the New York City Department of Environmental Protection,
if necessary, comment on the DRAFT DRAINAGE PLAN GRADE IMPACTS AND GRADE IMPACTS MITIGATION STUDY
REPORT, and may require the Consultant to make such revisions, provide additional information, and make further
studies, and to revise the report accordingly.
5. The Consultant shall conduct further studies and make revisions to the DRAINAGE PLAN GRADE IMPACTS AND
GRADE IMPACTS MITIGATION STUDY REPORT as directed by the Commissioner and shall submit the FINAL
DRAINAGE PLAN GRADE IMPACTS AND GRADE IMPACTS MITIGATION STUDY REPORT to the Commissioner for
acceptance.
4.39 FINAL DESIGN OF STEP STREET
Under this task the Consultant shall develop Final Design(s) for step street.
The design of the step street structure must be done in three phases as follow:
a) Conceptual Design
1) The Consultant shall inspect the site and become familiar with the general and specific nature of the Project and the
surrounding area. The Consultant shall prepare a photographic record, including all adjacent roadways and properties,
review the topographic survey, study the elevations and grades, prepare a site plan, and document the existing conditions.
2) The Consultant shall prepare two or more alternative Schematic Designs (as directed by the Commissioner) for the
step street and present along with impact assessment and an approximate cost estimate of each alternative to the
Commissioner for review and approval. The conceptual design shall include site plan, typical cross section, geometric
design including stair layouts, landscape design, street lighting, special treatment details along with material descriptions.
A 3D rendering for each proposed alternative must also be submitted for review and approval.
3) The Consultant shall present the “DDC approved” conceptual design(s) to the Public Design Commission, DOT
Geometrics/Bridges, Parks Department, Community Board, and other City, State, and Federal agencies as needed and as
directed by the Commissioner, for their review and approval.
4) Upon approval of the selected conceptual design by the Public Design Commission, DOT Geometrics/Bridges,
Parks Department, Community Board, and other City, State, and Federal agencies as required, and as directed by the
Commissioner, the Consultant shall proceed with the Preliminary Design phase.
b) Preliminary Design
In conjunction with the preliminary design of the step street, the Consultant shall:
NYC Department of Design and Construction
Infrastructure, October 2012
GR-87