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  • Flooding Events
    moorings and crashes into it The bridge is later rebuilt All mills in the Wissahickon Valley are demolished when the Fairmount Park Commission buys up the area to protect water quality in the Schuylkill River 1889 Flooding in the upper reaches of the Schuylkill River causes the Philadelphia Times to report There have not been many buildings in the town carried off but there are few that have not been damaged There is mourning everywhere for the dead There are hundreds utterly destitute They have lost all they had and have no hope of employment for the future 1894 Another flood batters Manayunk 1902 After a long rain the Schuylkill River rises on February 28 and crests on March 1 River Road is flooded to the eaves of one story buildings matching the height of 1869 floodwaters As the water recedes everything is covered with a foul smelling mud that takes days of shoveling to remove No lives are lost 1933 Portions of Manayunk are once again inundated 1935 In July the Schuylkill River basin floods again 1936 Heavy snow during the winter of 1935 1936 and an early warm spell in February cause rapid melting and statewide flooding 1942 In May the Schuylkill River once again experiences flooding 1948 The Manayunk area experiences another flood 1955 The Delaware River swells into one of its biggest recorded floods in history when the area is hit by Hurricane Connie and then Hurricane Diane five days later in mid August The Schuylkill River is not as severely affected but does once again rise to cover sections of Manayunk including all of Venice Island and portions of Main Street 1972 Hurricane Agnes rips through the area in June and causes major damage in Manayunk Agnes is described as the worst natural disaster experienced

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/flooding-events.html (2016-04-26)
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  • Flooding Events
    cfs 2 14 80 ft on 03 01 1902 98000 cfs 3 14 70 ft on 08 24 1933 96200 cfs 4 14 65 ft on 06 23 1972 103000 cfs Hurricane Agnes 5 14 57 ft on 06 02

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/peak-floods.html (2016-04-26)
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  • MNC - VI - Chet
    thunderstorms or tropical systems can cause rapid rise flooding conditions along the Schuylkill River The rate of rise to reach flood stage varies upon the event that occurs It should be noted that Venice Island ground level is significantly below flood stage heights II Summary Crest relationships between the flood stages and time to reach the flood stage exist for both the Philadelphia and Norristown gauges Floods of record are available for the two locations as well The threat of flooding in the area can be broken into the more likely occurrences versus the rarer events each having a time line for development and reaching peak flood stage The most common event for the area is a flood resulting from excessive rainfall due to a winter storm or a tropical storm Typically in this situation flood stage will be reached in 10 hours after the ending of the heavy rainfall event with record water heights in the area of 15 to 20 feet above ground level The second and more rare event for the area is a flash flood resulting from localized excessive rainfall due to a intense thunderstorm or an area of focused tropical rainfall In this situation flood stage will be reached in 4 6 hours after the ending of the excessive rainfall event with record water heights in the area of 10 to 15 feet above ground level A rare event would be an ice jam at or below the location on the Schuylkill River In this situation the back up of river waters around the jam would on occasion cause flood stage to be reached within 6 hours with an estimated record water height of 10 feet above ground level III Conclusion Venice Island has the least time to respond and complete necessary evacuation in a

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/venice-chet.html (2016-04-26)
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  • MNC, VI, Heinrich
    by right development a trip generation calculation should also be made for the existing use of the site or for a potential by right development of the site This will determine the net change in trip generation resulting from the rezoning request For your information a have calculated the potential trip generation characteristics for the three proposed Venice Island residential developments Table I attached summarizes the results of my calculations As indicated the three developments combined could generate about 3 000 to 3 500 trips per day total inbound an outbound with peak hour traffic generation of about 230 to 270 trips per hour during the morning peak hour and 280 to 340 trips per hour during the afternoon peak hour It should be noted that these volumes may be reduced somewhat due to the availability of public transportation l Highway Capacity Manual Special Report 209 Transportation Research Board Washington D C Latest Edition 2 Trip Generation Sixth Edition institute of Transportation Engineers Washington D C 1997 TABLE 1 TRAFFIC GENERATION CHARACTERISTICS VENICE ISLAND RESIDENTIAL DEVELOPMENT MANAYUNK NEIGHBORHOOD CITY OF PHILADELPHIA PENNSYLVANIA TRAFFIC VOLUMES 1 Description Daily Morning Peak Hour In Out Total Afternoon Peak Hour In Out Total Realen Development 270 DU 2 1 510 1 1750 19 22 93 115 112 137 94 110 46 55 140 165 Dranoff Development 160 DU 2 970 1 100 12 13 62 70 74 83 61 71 30 34 91 105 Neducsin Development 88 DU 2 570 660 8 38 39 46 47 37 44 18 22 55 66 Total 518 DU 3 060 3 510 39 43 193 224 232 267 192 225 94 111 286 336 1 Trio Generation 6th Edition Institute of Transportation Engineers Washington D C 997 2 Trips per occupied dwelling unit DU Design Year Base Traffic Conditions Existing peak hour traffic volumes should be projected to the anticipated completion date of the proposed development s This should include a combination of background traffic growth as well as the specific traffic generation characteristics of other nearby development proposals Background traffic growth is usually based on historical traffic growth patterns on the surrounding streets A second volume capacity analysis is then completed for future peak hour traffic conditions without development and levels of service are quantified to determine the adequacy of the streets and intersections in the study area to accommodate future traffic even with no development of the site For comparison purposes an analysis of future peak hour traffic conditions with a by right development of the site s can also be considered in examining the impacts of a rezoning request Design Year Traffic After Development The assignment of new traffic generated by the proposed new development s are added to design year base peak hour traffic volumes A third volume capacity analysis is then completed for future peak hour traffic conditions after development of the proposed residential development s and levels of service are quantified to determine the adequacy of the streets and intersections in

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/heinrich.html (2016-04-26)
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  • MNC VI PH letter
    floods As such it is unknown at this time whether the proposed apartments will cause any increase in these flood levels Once again while it may not officially required by FEMA the impact analysis should be expanded to assess the impacts of the proposed apartments on a range of flood frequencies up to and including the 100 Year event to insure that the proposed construction will not adversely impact flood levels for any frequency flood Please note that we would be happy to address each of these questions if a copy of the input data for Professor Weggel s new model of the Schuylkill can be obtained Review of City Flood Plain Controls In order to determine whether the proposed apartment construction complies with Philadelphia s own floodplain regulations we have reviewed Section 14 406 of the City s Flood Plain Controls According to Paragraph 5 of these Controls 5 Special Controls The following special controls are imposed to regulate setbacks in the flood plain construction and earthmoving activity along watercourses subject to Department of Environmental Resources a Within the Floodway 1 No encroachment including fill new construction or any development is permitted except that public utilities are permitted as long as they cause no increase in the One Hundred Year Flood level Bold face added As noted in the bold face type above Philadelphia s own Flood Plain Controls unconditionally prohibit fill new construction or any development in the Floodway regardless of its impacts to the 100 Year flood level In our professional opinion the construction of columns piers and pilings constructed within the floodway for the purpose of elevating a structure residential apartments above the floodway is included as a prohibited development activity According to the Controls the only activity in the Floodway that is given the opportunity to meet the no 100 Year flood level increase criteria as allowed by FEMA for all proposed Floodway activity is the construction of public utilities As such the Philadelphia requirement can be seen to be more stringent than the FEMA regulation In fact it could also be considered to more prudent and well informed than the FEMA regulation since it more comprehensively addresses all of the dangers of Floodway development not simply the threat of increased upstream flood levels In conclusion due to their location within the Schuylkill River Floodway the City s own Flood Plain Controls specifically prohibit the proposed apartment developments on Venice Island Review of FEMA Compliance Letter For Venice Island Hydraulic Analysis The Board should carefully review the compliance letter Attachment A issued by FEMA for the Venice Island hydraulic analysis letter addressed to Barbara J Kaplan Executive Director Philadelphia Planning Commission as prepared by Mr Thomas M Majusiak P E Director Mitigation Division FEMA dated May 15 2000 The review letter simply states that the analysis is in compliance with Title 44 of the Code of Federal Regulations it is not an approval letter for the proposed residential development Specifically in the letter Mr Majusiak states the following This is not an approval of the proposed project It simply indicates that the proposed project complies with the necessary floodway regulations All Federal state and local laws including all sections of the local floodplain management ordinance must be adhered to The above quoted paragraph specifically states that the Philadelphia development ordinance must be enforced Therefore any waiver from Section 14 1606 Flood Plain Contols 5 Special Controls would be in violation of the compliance letter Mr Majusiak further states the following The Federal Emergency Management Agency is not in the position to advocate floodway development Development within the designated floodway is contradictory to our Agency s mission of reducing the loss of life and property associated with natural and man made disasters Bold face added In the above quoted paragraph FEMA clearly states that in their opinion development within the floodway is dangerous and is attributable to loss of life and property Determination of Flood Frequency and Characterization of Flood Threat In additional to the technical questions and legal prohibitions regarding the proposed developments on Venice Island it was also considered important to describe in more direct less technical terms the flood threat that would be faced by residents occupying the proposed apartments This description has been developed in two steps First a determination of how frequently flooding problems can be expected on Venice Island has been made Secondly the exact nature of the flood threat to these residents has been characterized by attempting to recreate the flooding that occurred on the Island during Hurricane Floyd on September 16 17 1999 This characterization includes an estimation of the rate of rise of the Schuylkill floodwaters on the Island and a review of the accuracy and timeliness of National Weather Service Flood Warnings that were issued during the Hurricane Floyd flood Basis of Analysis The determination of expected flood frequency on Venice Island and the characterization of the flooding that occurred on the Island during Hurricane Floyd were based upon the following 1 1993 HEC 2 hydraulic computer model of the Schuylkill River prepared by the U S Army Corps of Engineers for FEMA This is also the same model used by Professor Weggel in his development on behalf of the developers of the new hydraulic model of the River described in Section in Section 2 above 2 Provisional flow data recorded by and obtained from the U S Geological Survey USGS on the Schuylkill River at Fairmont Dam USGS Gage 1474500 Schuylkill River at Philadelphia and the Wissahickon Creek at its confluence with the Schuylkill USGS Gage 1474000 Wissahickon Creek at Mouth 3 Flood Potential Outlooks and River Flood Warnings issued prior to and during Hurricane Floyd by the Mt Holly New Jersey Weather Forecast Office of the National Weather Service NWS The Mt Holly WFO is the NWS office responsible for issuing such flood bulletins for the Philadelphia area including the Schuylkill River Estimated Flood Frequency Based upon an analysis of cross section and stage

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/PH-letter.html (2016-04-26)
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  • that carries the most forceful and deep floodwaters during flooding events As you know FEMA is intensely engaged in encouraging communities around the country to take steps to reduce their vulnerability to flooding In Pennsylvania as elsewhere out mitigation program is providing federal funds to help relocate houses and businesses out of the floodplain to higher safer ground I view with alarm the possibility that Philadelphia would move in the opposite direction allowing for new residences to be constructed in the floodway in defiance of the exemplary floodplain ordinance the City adopted 20 years ago I urge you to ensure that the following considerations are taken into account in determining whether the development proposals should be approved First Philadelphia would be knowingly approving the location of residences in an area where future flooding is a certainty The City should recognize its potential legal liability for allowing the construction of residences where the possibility of future loss of life and property is not only possible but likely Secondly Philadelphia s continued eligibility for the National Flood Insurance Program could be jeopardized by approval of these projects if the technical basis on which they are deemed to meet federal standards is unsound

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/fema-witt.html (2016-04-26)
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  • Press Statement 11/17/03
    Zoning Board then under the directions of Tom Kelly mocked us and they mocked our experts some of the finest in the country What we did not expect was the same level of pandering to special interests from our state court system We did not expect the same indifference to public safety We did not expect the same indifference to even minimal standards of evidence and logic We are here today in part to express our outrage and dismay at the failure of our legal system Beyond that we are here to say the fight is not over We believe these developments have fundamental flaws and they cannot be made safe These are the undisputed facts Venice Island is within the Floodway of the Schuylkill River The floodway is the part of the river in a flood where water flows the deepest and fastest With heavy rainfall Venice Island could flood in as little as three hours During Hurricane Floyd water topped the island about the same time the flood warning was issued In a severe flood the water will be over 10 feet deep and flowing too fast for rescue boats Helicopter rescues are the most dangerous form of rescue and my not be possible in severe weather It takes only two feet of water to float a car Philadelphia does not have adequate rescue capability on the Schuylkill River It will cost millions and take years to develop that capability Manayunk has only four firefighters and no water craft People will wait to the last minute and try to save their cars pets and other belongings Vehicle access to these developments will be the first to flood This utterly predictable behavior was seen most recently in the Southern California fires causing several deaths There is no place within

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/031117-statement-k.html (2016-04-26)
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  • VI Flyer 2/28/01
    units Flat Rock Road Leverington Ave Approved and under Appeal Arroyo 88 units on Venice Island between the Arroyo Cafe and Green Lane Not yet submitted to zoning 100 Leverington Ave 56 rental units Approved Gay and Fleming Sts 67 rental units Approved Hunters Point 200 units Shawmont Ave and Umbria St Approved These developments can be expected to add well over 1 000 cars to the morning commute Evening Traffic Jam May 5 2000 Arroyo Cafe Cinco de Mayo event adds 700 cars to evening rush and gridlocks Green Lane Bridge and Main Street for over 4 hours C A careful examination of the projected benefits and liabilities these developments will bring to the community Some benefits being presented for the Connelly Container site are 1 Beautification of an industrial eyesore 2 Clean up of an environmentally contaminated property 3 Establishment of new public walkways along the river and canal 4 Increased landscaping and open space 5 A new parking garage for Main Street with approximately 200 new covered parking spaces to be available to the general public in addition to one reserved parking space for every bedroom in the new complex 6 Financial support for both Pretzel Park and the Venice Island Playground While all these are desirable improvements these results could be achieved by other projects on Venice Island For example those who appealed the ZBA s decision repeatedly advocated for other uses for the site such as passive recreation modern office space or non polluting light industry All produce less traffic and less danger A major liability for the development is the lack of safety for the people with their property and cars residing in the floodway of the Schuylkill River Unequivocal testimony was presented before the ZBA by swift water rescue experts One of whom

    Original URL path: http://www.manayunkcouncil.org/VeniceIsland/flyer0102.html (2016-04-26)
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