Meeting minutes regarding MTA subway station flooding and stormwater issues,

NYC 9/11 Public Portal Document

MTA Priority Locations and other areas of flooding concern NYC DEP Meeting - 6/08 Initial Location I Issue Short-term goal Permanent solution 1 DOT status DEP status Next step(s)ZResponsibility

Y , MNR - Fordham Station Run off from Webster MNR increased the existing retaining wall DEP verify adequacy of existing storm water. Fordham University planning new NYCDEP Response: Webster Ave catch basin |i Ave./Fordham height 1-2 feet to prevent roadway run off, system and increase if needed in this area. > dorms adjacent to MNR ROW with ' installation completed 1-28-08. As per existing Univ./surcharge from entering the MNR ROW. ' historic overland flow problems. City regulations, DEP review of connections to the J Plans calls for 45,000CF retention ' sewer system ensures that each specific site onty ' before tying into DEP sewers. DEP icontributes to the sewer up to stowable flow in to review the adequacy of - and accordance with the drainage plan for the area. I j perhaps apply an additional 10-20% No retention can be added off^e to buffer an I factor of safety. Additional retention adjacent facility. MTA should meet with Fordham could reduce the probability for ^to discuss their concerns. DEP understands that service disruption. Status? DEP > Fordham may be installing a retaining wall on their Investigate toe existing stormwater property. system capacity in Fordham Station area and improve as needed. i I Status? DEP installation of add1 I basin on Webster Ave. at Fordham j i location. Status? I I i

N URR-HPA&Line#2' Long Island City, Line 2: LIRR to store pumps in LIC for a quick I DEP to verify adequacy of existing capacity DEP to evaluate drainage path / I Evaluate drainage path (into DEP sewer or one connecting track and response. and increase if needed. evaluate existing sewer capacity. that is impacted by tides from an East River Hunter’s Point Avenue I Work is scheduled for June 2008. tributary) and determine need for existing pum| floods coincident with Status? Joint investigation capacity. Status? NYCDEP Response; DEP does] high tide and heavy conducted with Amtrak and DEP to not have specific location. No joint inspection rainfall. The area of find/ fix voids and determine the scheduled. MTA should provide precise location if flooding is maintained by integrity of the system by LIRR DEP assistance is needed. Amtrak. forces with assistance from Amtrak. One 18” damaged pipe was I identified, which is scheduled scheduled for repairs by LIRR late j June early July 2008.

N NYCT - 23rd St. / Park Sewer Back Flow (sewer DEP clean and maintain sewer. NYCT installed check valve (and gate valve). DEP inspecUon/cleaning took place NYCDEP Response: The 42" combined sewer Ave. direct connect) । Complete. on 5-14 to 5-22 on Park Avenue serving MTA was insperted and cleaned. An I between 23 and 21st streets. A obstruction in (he 15" sewer noted was not good amount of debris was addressed. However, fols 15" does not serve removed and the sewers were found NYCT facilities and is not impacting drainage for i to be in good condition. One of the them. 'lines and associated manholes were I J not completely cleaned. In other

i I i words, the sewer line has a reduced ! capacity. Status? I Need to advise them of the check valve permits. This is another location I where we can't access to I ____ 1__________ _ _______ ; I . _j_______________________ ■ --t - I J_____________________ I certain. N i NYCT - Times Square jSewer Back Flow. > DEP clean and maintain sewer. i NYCT install check valve. ' DEP inspected and cleaned 42nd i NYCDEP Response: DEP recommends NYCT Location where subway j ! ZTimeSq. 30” dia. install proper manhole covers in this station; drainage is directly manholes are located on the tracks and not connected to an DEP property secured. Check valves needed on NYCT ! sewer. ! connections to the sewer.

I Sewer system maintenance access is an I issue. DEP does not have J|the training for this. ____L_„_. ___ L._. 1-.

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