Len Phillips
Can anyone share your experience on how to proactively prevent the general public from coming into contact with the steam vapour arising from a flooded manholes after heavy rain pour? Have you put a venting chimney on any critical manholes beforehand if a storm is suspected to come which may create a steamer?
Len Phillips
At Cornell we have done this for small steam or condensate leaks that are in an area we can’t excavate immediately and have had good luck.
Con Edison does this. Check out this site for some photos: http://nyclovesnyc.blogspot.com/2012/06/steam-vapor-rising-through-street.html
Petty, David
Groundwater intrusion onto our steam line conduit, Eisenhower Park in suburban Nassau County NY
Best regards;
David Petty
Plant Manager
Nassau Energy Corp.
185 Charles Lindbergh Blvd.
Garden City, New York, 11530
Tel. 516-222-1022 x 220 - fax 516-222-2047
Email: david...@gdfsuezna.com
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Davin, Pat
Philadelphia uses steam stacks when needed to get the steam up away from pedestrians. We will often pre place the stacks when larger storms are forecasted or for hurricane type weather.
Patrick R. Davin
Manager, Facility Services
Veolia Energy Philadelphia Inc.
(267) 350-5887 Phone
(267) 350-5898 Fax
pda...@veoliaenergyna.com Email
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Rod Crichton
In London in pedestrian sensitive areas we have started using Fibrelite lids. The frame and lid form a seal which prevents steam from escaping around the lid but we have to add a permanent vent. For vents, we use the same poles the City uses for street/traffic lights so they blend into the streetscape.
Rod
Rod Crichton
Chief Engineer,
Assistant Plant Manager
T: 519-432-5066
London District Energy
Power Division of Veresen Inc.
From: distribut...@googlegroups.com [mailto:distribut...@googlegroups.com] On Behalf Of Len Phillips
Sent: October-09-13 10:08 AM
To: distribut...@googlegroups.com
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Len Phillips
On Wednesday, October 9, 2013 10:07:48 AM UTC-4, Len Phillips wrote:
Paul Razo
I am doing what Rod described. Using the Fibre Lite manhole covers keeps the water from entering the manhole and the vent stack keeps the Fibre Lite lid from building up pressure and popping the seal.
Is the flooding due to plugged manhole floor drains, slow manhole drains, no manhole drains or an absence of sump pumps or all three? We all deal with different situations and one answer is not always the right answer for all, if you could answer the questions I put in the previous sentence we could probably zero in a little more.
Thanks
Paul Razo
From: distribut...@googlegroups.com [mailto:distribut...@googlegroups.com] On Behalf Of Len Phillips
Sent: Thursday, October 10, 2013 10:43 AM
To: distribut...@googlegroups.com
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Joyce Lee
We had instances where our sump pumps failed to remove water resulting in manhole flooding and steamers.
Joyce
gandy
Kyle Gandy
On Wednesday, October 9, 2013 10:07:48 AM UTC-4, Len Phillips wrote:
Hugh Bahar
Mid-to-long range, try to get trap lines off the floor of the vault, place aluminum shields over steam lines where water drips down from the vault cover, replace damaged and missing steam line insulation, and for new vaults make sure you integrate a sump pit and gravity drain to a nearby storm sewer.
Hugh Bahar, PMP
Sr. Engineer
Cornell University, Facilities Engineering
201 Humphreys Service Building
Ithaca, NY 14853-3701
Email: hr...@cornell.edu
Desk: 607-255-3853
Cell: 607-592-2197
Fax: 607-255-8071
From: distribut...@googlegroups.com [mailto:distribut...@googlegroups.com]
On Behalf Of gandy
Sent: Thursday, February 27, 2014 1:14 PM
To: distribut...@googlegroups.com
Subject: {Distribution Forum} Re: Controlling steam from flooded manholes
At Rowan University, any steam manhole in a public way (sidewalk) will have buried 4" steel vented lines run to a non-public area (lawn area) typically within 10-ft of the manhole. Our sidewalk manholes also utilize the Fiberlite solid
lids since 2010 and has eliminated the occasional flip-flop foot burn. I've never used the chimney approach.
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