Initial Publication Date: October 17, 2007

Geology, Aberjona River & Wetland, Monitoring Wells

Geology

Surficial geology map (Chute, 1944)
Bedrock exposed along Wildwood Avenue
Dedham gneiss
Thin section of Dedham Granodiorite
Fracture in bedrock
Fracture in bedrock along Wood Avenue west of Aberjona River
Bedrock core from Beatrice property
Polished and unpolished faces of cores from Beatrice property


Diamicts from a split-spoon sample in a monitoring well south of W.R. Grace and from a shallow excavation at the former Riley Tannery property
Sands taken from split-spoon samples from the BUG well just north of Olympia Avenue and west of the UniFirst property
Lodgement till from split-spoon samples taken in wells drilled at W.R. Grace
Peat in surface materials in wetland
Peat sample from wetland obtained with a post-hole digger
Organic matter from a washed sample of peat


Aberjona River and Wetland

map of USGS gaging station relative to Wells G & H Superfund site
Aberjona River watershed
USGS weir on Aberjona River at Winchester, MA, two miles downstream of wells G and H
USGS gaging station and weir on Aberjona River in Winchester, MA
Wetland in Aberjona River at beaver dam below well H (1999)
Scott Bair and Maura Metheny on the mighty Aberjona - beaver dam in background
Purple loosestrife choking the wetland
Aberjona River and wetland from Salem Street bridge
Aberjona River flows right to left across image
North end of wetland with well H in foreground


Boardwalk extending west of well H into the wetland built by the U.S. Geological Survey to access observation wells
Boardwalk built into wetland to access monitoring wells for the 30-day aquifer test
Monitoring well nest S91
Aberjona River lies just past monitoring wells in left foreground
Wetland looking east
Aberjona River wetland looking east from 15-acre property
Aberjona River and wetland in winter
Aberjona River near Salem Street bridge


Monitoring Wells

Monitoring well nest S90
Nest of S90 wells between wells G and H on the east floodplain
Monitoring wells S84 on east side of wetland
Shallow, middle, deep wells in the S84 nest between wells G and H
S84 nest in winter
Monitoring wells at Debris Pile E
BW6 well nest on the 15-acre property at site of Debris Pile E
Nested monitoring wells at back of Grace property
Wells in back of Grace property at site of drum excavation