Hidden Lake Forest Preserve [site survey, ecological reconstruction, ecosystems/ecological value, slope, hydrology, soils, minerals, cultural improvements, and neighboring land use] (3.5833)
Date: circa 1975Creator: Forest Preserve District of DuPage County
Type: Map
Description:Subtitle above is summary of sheet-titles. A portion of this land parcel is leased by the Arboretum as a part of the Illinois State Toll Highway agreement of 1985. For a representation of the area leased, see DuPage County. Forest Preserve District. Hidden Lake Forest Preserve ... Arboretum-Forest Preserve District cooperative research program space study (SURV:B VI (c) 1).
Extent: 9 sheets stapled
1978/11/27: Marion T. Hall to Jack T. Knuepfer (3.57370)
Date: November 27 1978Creator: Hall, Marion Trufant
Type: Document
Description:A set of two documents.
The first document is a letter from Marion T. Hall to Jack T. Knuepfer outlining the negative impact of ineffective sewage and stormwater management on the Morton Arboretum's land and waterways.
The second document is a flyer promoting a one day conference sponsored by the George Williams College's Institute for Environmental Awareness.
Extent: 4 sheets
Willoway Brook Basin Study (E. Branch DuPage River Tributary #5) (3.6037)
Date: January 1985Creator: DuPage County Department of Public Works
Type: Map
Extent: 12 sheets bound
Existing and proposed watersheds, North-South Tollway plan (3.5865)
Date: March 1 1986Creator: Illinois State Toll Highway Authority
Type: Map
Description:The principal title above appears in ms. added to drawing 6 in the State Toll Highway Authority's aerial survey on which the plan for the North-South Tollway was drawn in (See BOUND:C III (c) 1). Watershed features are also drawn in in this work which appears in 3 sheets labelled in ms.: drawing no. 88-89, and 91.
Extent: 3 sheets stapled
Wetlands and Japanese Coll. drainage [and] North Asian and European Collection drainage (3.6142)
Date: circa 1988Creator: Tyznik, Anthony
Type: Map
Description:Presents piping and swale grading options for the Eastern U.S. Wetlands, Japanese, North Asian, and European Collections.
Extent: 1 sheet
Wetlands and Japanese Coll. drainage [and] North Asian and European Collection drainage (3.6097)
Date: circa 1988Creator: Tyznik, Anthony
Type: Map
Description:Presents piping and swale grading options for the Eastern U.S. Wetlands, Japanese, North Asian, and European Collections.
Extent: 1 sheet
Wetlands and Japanese Coll. Drainage [and] North Asian and European Collection Drainage (3.6141)
Date: circa 1988Creator: Tyznik, Anthony
Type: Map
Description:Presents piping and swale grading options for the Eastern U.S. Wetlands, Japanese, North Asian, and European Collections.
Extent: 1 sheet
South Farm Watershed Map (3.5577)
Date: February 15 1989Creator: Kelsey, Pat
Type: Map
Description:The watershed is traced on parts of sheets 1 and 2 of the Sidwell Company's Topographic survey of the Arboretum made in 1986 (SURV:A III (c) 2).
Extent: 1 sheet
Watershed Delineation Maps (3.6210)
Date: 1991Creator: Hootman, Rick
Type: Map
Description:Watersheds superimposed on topographic maps produced by the Sidwell Company.
Extent: 5 sheets
East Branch Valley View project area (3.6286)
Date: June 5 1995Creator: Department of Environmental Concerns
Type: Map
Extent: 1 sheet
Valley View area, Eagle Lake alternative (3.6287)
Date: July 11 1995Creator: Department of Environmental Concerns
Type: Map
Extent: 1 sheet