HomeMy WebLinkAbout20200083 South Broadway Hotel Engineering Response 4-3-20 THE CAPITAL DISTRICT OFFICE
C1/�/� �nn Civil Engineers 547 River Street
f'JVL ��G Land Surveyors
— Planners Troy, NY 12180
COMPAN I ES�� Environmental&SafetyProfessionals P: 518.273.0055 OI'888.539.9073
Landscape Architects
ProudtobeEmployeeOwned TransportationPlanners&Engineers www.chazencompanies.com
Ms. Susan Barden,AICP
City Principal Planner
City of Saratoga Springs
474 Broadway Saratoga Springs, New York 12866
April 3, 2020
Delivered via email: susan.barden@sarato�a-sprin�s.com
Re: City Designated Engineer Services for Site Plan application and SWPPP Review—15t Submittal
South Broadway Hotel Site Plan Application
176 South Broadway, City of Saratoga Springs, Saratoga County, New York
City Project No. PB#20200083
Chazen Project No. 32004.02
Dear Susan:
The Chazen Companies (Chazen) have completed our review of the following materials received:
• Site Plan application package containing:
o Application for Site Plan Review (including PUD), prepared by the LA Group, dated February 4,
2020.
o Cost Estimate for LOC dated February 3, 2020.
• Water and Sanitary Sewer Engineering Report, prepared by The LA Group, dated January 31, 2020.
• Stormwater Pollution Prevention Plan, prepared by The LA Group, dated January 24, 2020.
• Site drawings entitled "South Broadway Hotel Site Plan Application", dated January 30, 2020, prepared
by The LA Group, unless noted otherwise, consisting of the following 14 sheets:
o Cover
o Survey Map of South Broadway Hotel, prepared by CHA Consultants last revised January 17,
2017.
o L-1.0 Existing Conditions, Demolition & ESC Plan
o L-1.1 Existing Conditions, Demolition & ESC Plan Enlargement
o L-2.0 Layout& Materials Plan
o L-2.1 Layout& Materials Plan Enlargement
o L-3.0 Grading& Drainage Plan
o L-4.0 Utility Plan
o L-5.0 Landscape Plan
o L-6.0 Construction Details
o L-6.1 Construction Details
o L-6.2 Construction Details
o L-6.3 Utility Details
o L-6.4 Utility Details
Following are our observations/comments:
HUDSON VALLEY•CAPITAL DISTRICT• NORTH COUNTRY•WESTCHESTER• NASHVILLE,TN
Chazen Engineering, Land Surveying& Landscape Architecture Co., D.P.C. (New York)
Chazen Engineering Consultants, LLC(Tennessee)
South Broadway Hotel—PB#20200083—15t Submittal Review
Apri13,2020
Page 2 of 6
General:
1. The City's project number of 20200083 should be added to all site plan application and all supporting
documents.
2. A Site Plan Application Checklist, Complete Streets Checklist, Environmental Assessment Form and
Water Service Connection Agreement were not submitted with this application. If the City would like us
to review these documents, please forward to us.
Water/Sewer En�ineerin�Report:
3. The report should include a discussion regarding the system,capacity and adequacy of the downstream
collection, conveyance and treatment systems (up to and including the wastewater treatment plant)to
handle the increase in flow resulting from this project. Please revise accordingly and provide an ability
to serve letter form the WWTP operator.
4. Section IV of the Engineer's Report provides projected wastewater flow rates for two uses only,Sleeping
Units and Employees.The Engineer's Report states that there is a proposed bar/lounge included within
the hotel but does not include the wastewater generated by this use.There does not appear to be any
details on if there will be any food service, and as such full review of the wastewater flow rates cannot
be conducted until all potential wastewater uses are fully understood.The Applicant needs to include a
discussion on all proposed sewer system components (i.e. grease traps, etc.).
5. The hydrants tested do not appear to be the closest hydrants to the site as there appears to be an
existing hydrant located immediately adjacent to the proposed hotel. Further these hydrants were
tested on March 27, 2018. It is recommended that new hydrant tests be performed on the hydrant
located adjacent to the site and because the tests are over 2-years old. Typically, hydrant flow testing
shall be no older than six (6) months unless it has been deemed that no changes to the supply or
transmission of water within that area have occurred since the test was performed. Our office does not
take exception to hydrant flow tests being conducted in support of building permit application, so long
at the City does not take exception.The fire code official shall be notified prior to the water supply test.
Further, our office understands that a full review of the sprinkler system and NFF will occur during the
building permit application.
Proiect Cost Estimate:
6. It appears the unit prices used in the provided cost estimate may be below what is typically seen for site
work within the NYSDOT ROW. Please review and update as necessary.
Site Plans:
7. Please provide a signed and sealed copy of the boundary, topographic and utility survey prepared by
CHA Consulting.
8. Sheet L-5.1 titled "Lighting Plan" is missing from the site drawings. Please provide in subsequent
submissions. A review of the lighting plan will occur once provided.
South Broadway Hotel—PB#20200083—15t Submittal Review
Apri13,2020
Page 3 of 6
9. Please provide additional spot elevations throughout the site and particularly at all handicap parking
spaces to assure the slopes do not exceed the required minimum.
10. There appears to be proposed work within the NYSDOT ROW, including an open cut trench through the
road.The Applicant to provide the plans to the NYSDOT for review and comment.
11. It appears, based on the location of the construction entrance,that construction traffic will be directed
to use Todd Street to enter and exit the site. It appears that only a portion of Todd Street is to be re-
paved following construction.The City should consider requiring the Applicant to re-pave the full width
of Todd Street since it will be significantly affected by construction traffic?
12. Further, the Todd Street intersection with South Broadway appears to have a small turning radius. It is
assumed that concrete trucks will use Todd Street(based on the location of the construction entrance).
Please submit vehicular maneuvering plans showing construction vehicles can be accommodated at this
entrance.
13. It is unclear what the proposed width of Todd Street will be following construction; please revise the
plans accordingly.
14. The Applicant shall provide the plans and engineering report to the Fire Department for review and
comment. Please submit for the record a letter from the Fire Department indicating that they can
adequately service the proposed use.
15. Please provide a fire truck maneuvering plan, using the largest responding emergency vehicle as
prescribed by the responding fire department, showing access through the site.
Section D105.1 of the 2015 Fire Code states "Where the vertical distance between the grade plane and
the highest roof surface exceeds 30 feet (9144 mm), approved aerial fire apparatus access roads shall
be provided. For purposes of this section, the highest roof surface shall be determined by measurement
to the eave of a pitched roof, the intersection of the roof to the exterior wall, or the top of parapet walls,
whichever is greater."Section D105.2 of the 2015 Fire Code states "Aerial fire apparatus access roads
shall have a minimum unobstructed width of 26 feet(7925 mm), exclusive of shoulders,in the immediate
vicinity of the building or portion thereof." The cover sheet indicates the building will be 4-stories and
49 feet high. The side of the building on which the aerial fire apparatus access road is positioned shall
be approved by the fire code official. The Applicant to provide which side of the building once
determined by the fire code official. Conformance to the Fire Code will be reviewed once an answer is
provided.
16. The Applicant to provide the gross building area of the proposed building.
17. The layout of the proposed parking within the building is not depicted. Please provide.
18. Please revise the design to include gas and electric utilities that are to service the proposed structures.
Drawings should reflect the location of utility lines, points of connection and the location of ineters,
transfomers, etc. along with landscape screening.
19. Detail 5 Sheet L-6.4 does not conform to the City of Saratoga Springs standard details. The specified
pipe zone backfill should be "well graded sand with %-inch maximum particle size and not more than
South Broadway Hotel—PB#20200083—15t Submittal Review
Apri13,2020
Page 4 of 6
10%passing#200sieve...".The plans indicate NYSDOT Size 1&2 crushed aggregate for pipe zone backfill
which has a larger gradation than the City standard. Please revise and cross reference all details to
ensure conformance with City standards.
20. It appears that there will be a permanent shared access and parking with both the neighboring parcels
located at the southeast corner of the Lincoln Avenue and S. Broadway intersection. Please submit a
copy of the agreements with these two parcel owners for the City's records — please note that these
agreements will need to be filed in the County Clerk's office for all properties involved. Also please
depict the limits of the proposed easement on the plans.
Further, since access to those existing two parcels is being altered the Applicant shall re-evaluate fire
apparatus access and turning maneuverability for those parcels as well. Please submit appropriate
maneuverability plans.
21. The existing hydrant on South Broadway appears to be connected to an abandoned watermain
according to the utility plan sheet. Further, it does not appear that the utility plan depicts any other new
or existing hydrants. The Applicant to clarify or revise accordingly.
22. Sheet L-2.0 depicts a retaining wall that runs adjacent to the parking structure ramp. It is anticipated
that sheeting will be required in order to facilitate construction of the building and the retaining walls
or an easement will be required from the adjoining property owner. Please note as such on plans or
show the proposed limits of the temporary construction easement and provide a copy of the agreement
with the neighboring property owner for the City's record.
23. Sheet L-3.0 depicts a trench drain that is noted as being internally drained as is catch basin 7. No MEP
plans or structure details were provided with this submission. Where does this system discharge? How
is it treated? It is lower than the surrounding storm sewer system? Please clarify and revise design
accordingly.
SWPPP:
24. The project is a re-development with an increase in impervious area. The pre-development watershed
map does not show sufficient existing conditions to verify the on- and off-site watershed delineation
nor their impervious surfaces. Please updated the SWPPP accordingly.
25. The existing conditions subcatchment 1 lists 39,120 sq/ ft. of Paved parking as the only impervious
surface, however it appears that the existing buildings,Todd Street,gazebos etc.are not accounted for.
Please clarify and revise the SWPPP accordingly.
26. It appears that AP-1 is the existing catch basin at the south corner of Todd Street. The SWPPP must
clearly describe the exact design point into which stormwater is directed. Please revise all design points
accordingly.We believe that AP-1 should be broken up into two design points—the catch basin located
at the south corner of Todd Street and the catch basin located just upstream of it, since the pipe
between the two catch basins could be overwhelmed by proposed storm system.
27. There is insufficient topographical information to review the pre- and post-subcatchment boundaries
that flow onto the site from neighboring properties. Based on the topographic information provided
South Broadway Hotel—PB#20200083—15t Submittal Review
Apri13,2020
Page 5 of 6
the neighboring properties to the north, east and south side of Todd Street do flow onto the site and
will be collected and conveyed into the proposed stormwater management systems,thereby rendering
them inadequate. Please revise the plans, and SWPPP accordingly.
28. The post-development model indicates that subcatchments 1, 3, 11 and 12 (which include the majority
of the roof) are tributary to AP-1. It is unclear how those subcatchments get treated prior to discharge
to AP-1. Please clarify and revise both the plans and the SWPPP accordingly.
29. It is not clear where the roof(subcatchment 11 and 12) nor the internally drained trench drain and CB
noted previously are to be discharged. Please clarify and revise both the plans and the SWPPP
accordingly.
30. The stormwater management report indicates that an isolator row in the underground chambers will
provide the required pre-treatment.The HydroCAD model indicates however that exfiltration is utilized
for all 52 of the chambers, which indicates exfiltration is utilized in the pre-treatment area. According
to discussions with NYSDEC representatives,exfiltration may not be modeled in pre-treatment facilities.
Please revise the SWPPP accordingly.
31. Please provide pre-treatment calculations for the isolator row that indicates it meets the requirements
of the NYS Stormwater Management Design Manual (SMDM).
32. All of the structures in the stormwater treatment system need to be modeled, specifically the diversion
structure and outlet control structure. Please revise the SWPPP accordingly.
33. It is unclear how all portions of subcatchment 10 will discharge to catch basin 3. Please clarify and revise
the SWPPP accordingly.
34. It is unclear how all portions of subcatchment 9 will discharge to catch basin 2. Please clarify and revise
the SWPPP accordingly.
35. The plans do not show how the trench drain and catch basin 7 are connected to the internal system
noted on the plans—please indicate piping for these components.
36. In the HydroCAD model, the runoff depth shows a ">" indicating that a time span of 5-20 hours is not
sufficient to realize the full effects of the storm.The applicant to revise the time span such that it is at
least the length of the storm analyzed (24 hours).
37. Compaction of the soil within the future location of the underground infiltration chambers may occur
due to construction traffic. Please add a note to the plans indicating that construction traffic must avoid
the area of the infiltration system to avoid over compacting and adversely affecting the natural
infiltration rate of the soil.
38. Falling head permeability tests must be conducted within the limits of the proposed underground
infiltration chambers in accordance with the NYS Stormwater Management Design Manual (SMDM).
Please add the locations of the infiltration tests, borings, etc. along with the results of these tests on
the site plans so that we can confirm this criterion is met.
South Broadway Hotel—PB#20200083—15t Submittal Review
Apri13,2020
Page 6 of 6
39. The infiltration tests conducted were performed 4' below existing site grades (approximately elevation
of 313') at a rate of 34-36 in/hour. The SMDM requires that the infiltration testing be performed 24"
below the bottom of the proposed infiltration system. The testing presented is not. It is actually 5 feet
above the required testing elevation of 308'. Please conduct testing that meets this requirement,verify
that the design rate is appropriate and revise the plans and SWPPP accordingly.
40. Section 4.1 of the SWPPP notes: "Seed and mulch bare soil areas within 14 days of disturbance unless
construction will resume in that area within 21 days". However,the SPDES General Permit requires that
stabilization be initialized in such areas by the end of the next business day and be complete within 14
days. Please revise the note accordingly.
41. City Code Chapter 242 requires long-term maintenance of the stormwater management practices.The
following notes need to be added to each SWPPP under Post-Construction Operation and
Maintenance of Stormwater Control Devices:
a. "All post-construction stormwater management facilities must be inspected annually by a
qualified professional, a report prepared and submitted to the City Engineer documenting the
inspections as well as the maintenance activities that were completed during the prior year."
b. "The City of Saratoga Springs shall approve a formal maintenance and inspection agreement in
accordance with City Code Chapter 242 for stormwater management facilities to ensure the
practices will be properly operated and maintained in accordance with the long-term
operation and maintenance plans. This agreement shall be binding on all subsequent
landowners and recorded in the office of the County Clerk as a deed restriction on the
property." A draft maintenance agreement was provided and shall be reviewed by the City
and City's counsel.
In order to expedite and simplify the review of revised materials we would appreciate if the next submission
be accompanied by a response letter that describes the revised materials and how our comments were/were
not integrated.
If you have any comments, questions or need additional information, please do not hesitate to contact this
office at 518-273-0055.
Sincerely,
� - .,'� (,- .,.._.�_..
� , _� _- �
James J. Connors, P.E., Principal
Sr. Director, Engineering Services
cc: Richard Adams, PE/Jennifer Nechamen, P.E. Chazen
File
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