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Allan J. Koch Cherokee Ranch Science Institute collection, 2010-2019

Identifier: D-19008

Scope and Content

This collection documents the activities of the Cherokee Ranch Science Institute (CRSI), which conducts research and provides science-related educational programming at the Cherokee Ranch and Castle Foundation in Sedalia, Colorado. The Institute was founded in 2013 by retired geologist Dr. Allan J. Koch, who donated these materials shortly before he passed away in 2019. This is a curated collection of CRSI materials intended for public use, containing no archival records of the Institute. The collection consists entirely of born-digital items, including presentations, abstracts, maps, and research papers about the geology, archaeology, and history of the region around Cherokee Ranch in Douglas County.


  • 2010-2019

Access and Use

This collection is open to researchers via digital access copies available online. Access to the master files of born-digital collections is restricted. See for more information and hours of operation.

Biographical Note

Allan J. Koch (1943-2019), better known as “Al,” grew up in Iowa where he was a star basketball player and student athlete at Iowa State University. He earned his Ph.D. in geology from the University of Washington in 1970 and went on to have a 30-year career in the petroleum industry, working in exploration and research at locations across the United States and internationally. Koch retired to Castle Pines in 2000, not far from the historic Cherokee Castle and its 3400 acres of protected wildlife sanctuary. Koch first became involved with the Cherokee Ranch and Castle Foundation in 2003 as a volunteer. He helped create the Cherokee Ranch Science Institute in 2013 and served as its first director.


867 Megabytes (13 items) : 5 PDF, 1 PPT, 6 PPTX, 1 TIFF

Language of Materials



The collection is arranged in four series in alphabetical order. The titles of Series II, III, and IV were supplied by the donor and correspond to the different areas of scientific research conducted by the Cherokee Ranch Science. Series I was added by the processing archivist to contain one document not included in the original digital file structure, which provides a general overview of the Institute.

Series I: About CRSI.
Series II: Archaeology.
Series III: Geology.
Series IV: Petrified Wood.

Acquisition Information

This collection was donated by Al Koch in February 2019.

Existence and Location of Copies

Access copies of the born-digital materials that comprise this collection are available online in the Archives and Local History digital repository. See the External Documents link below.

Guide to the Allan J. Koch Cherokee Ranch Science Institute Collection
Alyssa Carver
28 September 2022
Description rules
Describing Archives: A Content Standard
Language of description
Script of description
Language of description note

Repository Details

Part of the Archives and Local History, Douglas County Libraries Repository

Douglas County Libraries
100 S Wilcox St
Castle Rock CO 80104 United States