TY - Generic T1 - Landslides from Tropical Storm Irene in the Deerfield Watershed, western Massachusetts T2 - Abstracts with Programs - Geological Society of America Y1 - 2013 A1 - Stephen B Mabee A1 - Jonathan D Woodruff A1 - Fellows, John A1 - Joseph P Kopera KW - #Landslides KW - #NaturalHazards KW - #StaffPubs KW - Cold River KW - Deerfield Watershed KW - effects KW - Environmental geology KW - geologic hazards KW - Irene KW - landslide KW - landslides KW - mass movements KW - massachusetts KW - natural hazards KW - storms KW - Tropical Storm Irene KW - United States KW - western Massachusetts AB - Four landslides (3 translational debris flows and 1 rotational slide) occurred along the Cold River within the Deerfield River watershed (1440 km (super 2) ) in northwestern Massachusetts closing a six mile section of Route 2, a major east-west transportation corridor, for 3.5 months. These are among the largest landslides to occur in Massachusetts since 1901. Tropical storm Irene dropped 180-250+ mm of rain in a 12 to 15-hour period on the Deerfield watershed preceded by 130-180 mm of rain in the 1.5 weeks leading up to Irene. Soils were saturated, an unusual condition for the month of August, and probably contributed significantly to slope failure. The three translational slides occurred at approximately 10 am on August 28, 2011, involved 765 m of slope at an average angle of 28-33 degrees , covered an area of 1.2 ha and moved about 7645 m (super 3) of material. Bedrock sheeting joints oriented parallel to the slope (284 degrees , 38-40 degrees dip) provided the slip surface upon which the overlying 0.6-1.2 m of colluvium and glacial till slid. The rotational slide occurred along an unarmored section of the Cold River. The slip surface was a 4-8 foot thick layer of laminated lake-bottom sediments overlain by 12-19 feet of stream terrace and debris flow/alluvial fan deposits transported by Trout Brook, a smaller tributary to the Cold River. This section of Route 2 has experienced chronic failures beginning with the storm of 1938. The cost to repair this six-mile section of Route 2 was $22.5 million. Flooding within the Deerfield watershed was extreme with a record-breaking peak flow of 3100 m (super 3) /s (72 year record) where the Deerfield enters the Connecticut River. Approximately 1.6x10 (super 8) m (super 3) of water was discharged through the Deerfield during the event indicating that approximately 112 mm of Irene's rainfall was converted directly to runoff, a yield of between 45% and 62%. Clays and silts locked in storage in the glacial sediments within the watershed were mobilized resulting in record-breaking sediment loads 5-times greater than predicted from the pre-existing rating curve. Approximately 1.2 Mtonnes of sediment was discharged by the river during Irene. Where the Deerfield and Connecticut Rivers meet, the Deerfield watershed area is one tenth the size of the Connecticut River, yet the Deerfield produced as much as 40% of the total sediment observed on the lower Connecticut. JF - Abstracts with Programs - Geological Society of America PB - Geological Society of America (GSA) : Boulder, CO, United States CY - United States VL - 45 SN - 00167592 UR - https://gsa.confex.com/gsa/2013NE/webprogram/Paper215998.html IS - 11 N1 - Accession Number: 2014-027064; Conference Name: Geological Society of America, Northeastern Section, 48th annual meeting; Bretton Woods, NH, United States; Conference Date: 20130318; Language: English; Coordinates: N411500N425500W0695500W0733000; Coden: GAAPBC; Collation: 2; Collation: 83-84; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201417; Monograph Title: Geological Society of America, Northeastern Section, 48th annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic JO - Abstracts with Programs - Geological Society of America ER - TY - RPRT T1 - Preliminary field report on the November 13th-14th, 2011 landslide near Steam Mill Road, Deerfield, Massachusetts Y1 - 2011 A1 - Joseph P Kopera A1 - Stephen B Mabee KW - #Deerfield KW - #Landslides KW - #MGSPub KW - #NaturalHazards KW - #Reports KW - flooding KW - hazards KW - Irene KW - landslide KW - mudslide KW - natural hazards KW - swamp AB - On November 13th and 14th, 2011, residents and business owners in the area of Wapping Road in Deerfield, Massachusetts, began to notice light-gray, clay-rich mud appearing in the streams and wetlands east of State Route 5/10. The mud quickly clogged culverts under Wapping Road, Route 5/10, and the Pan Am Southern Railway tracks, partially filled in wetlands on both sides of Route 5/10, and partially filled in drainage ditches upgradient of these wetlands. This resulted in localized flooding of property along the east side of Route 5/10. Prepared for the Deerfield Board of Selectman and Board of Public Health 19 pages. A NEPR radio interview with Joe Kopera about the landslide can be found at http://nepr.net/news/2011/12/02/fallout-2011s-extreme-weather-landslides-ice-jams/. JF - Open File Report PB - Massachusetts Geological Survey UR - http://www.geo.umass.edu/stategeologist/Products/reports/Deerfield_LS_Report_final.pdf ER - TY - RPRT T1 - Preliminary field report on the Route 2 landslides of tropical storm Irene, August 28, 2011 Y1 - 2011 A1 - Stephen B Mabee A1 - Joseph P Kopera KW - #Landslides KW - #MGSPub KW - #NaturalHazards KW - #Reports KW - Cold River KW - hazards KW - Irene KW - landslide KW - Mohawk State Forest KW - natural hazards KW - Rt 2 KW - Savoy AB - The Massachusetts Geological Survey accompanied Massachusetts Department of Transportation personnel in the field on Tuesday, September 6, 2011, to observe the landslide and flooding damage along the Route 2 corridor caused by Hurricane, which struck the area on August 28, 2011. The purpose of the visit was to: 1) identify the type of slides that occurred; 2) estimate the dimensions and volume of material moved; 2) estimate the geological and environmental conditions leading to the slope failures; and, 4) determine the propensity for future occurrence. Four landslides were observed. Slide 1 is immediately east of the confluence of Trout Brook with the Cold River and Slides 2, 3, and 4 are clustered together on a north- facing slope about 1850 feet east of the confluence of Black Brook with the Cold River. Report prepared for Massachusetts Department of Transportation. PB - Massachusetts Geological Survey UR - http://www.geo.umass.edu/stategeologist/Products/reports/Rt2_Irene_FieldReport.pdf ER -