Skip to main content
Advanced Search
The Refugio Valley
Rocks, Soils, Hills and Valleys
Estuary and Watershed
Human Settlement
Rails, Piers and Roads
The Hercules Powder Works
Explosives and the Second Industrial Revolution
Commerce in Explosive Products
Operation and Development of the Hercules Works
Conditions of Production
The Municipality
Factory Town
Municipal Growth
Municipal Crisis
Municipal Austerity
Times and Places
Neatline
Neatline Time
Timeline
Sources and Reading
About HHS
Buy Our Book!
“Historic US 40 Route” Sign Project
Seeking Information on Ceramic Acid Vessels
Search Items
Browse All
Browse by Tag
Search Items
Browse Map
Search for Keywords
Narrow by Specific Fields
Logical operator
AND
OR
Field
Select Below
Title
Date
Subject
Description
Creator
Contributor
Rights
Source
Publisher
Format
Type
Language
Coverage
Relation
Identifier
Death Date
Birthplace
Event Type
Birth Date
Participants
URL
Occupation
Biographical Text
Bibliography
Player
Imported Thumbnail
Time Summary
Interviewer
Interviewee
Location
Transcription
Local URL
Original Format
Physical Dimensions
Duration
Compression
Producer
Director
Bit Rate/Frequency
Text
Email Body
Subject Line
From
To
CC
BCC
Number of Attachments
Standards
Objectives
Materials
Lesson Plan Text
Type
Select Below
contains
does not contain
is exactly
is empty
is not empty
starts with
ends with
Terms
Search by a range of ID#s (example: 1-4, 156, 79)
Search By Collection
Select Below
No Collection
Anita McKee
Ashland Inc.
Barry Brown
Bob Polacchi
City of Hercules
Contra Costa County Historical Society
Earl Combs
HHS Activities
HHS Industrial
HHS Municipal
Irene Silcock Dias
Jay Tucker
Jennifer Posedel
John Bender
Lynn Fissell
Maps & Aerial Photos
Oral Histories
People
Pinole Historical Society
Published Histories
Stephen Lawton
Steve Kirby
Susan Keefe
The Herculean
WH McBryde
Search By Type
Select Below
Dataset
Email
Event
Hyperlink
Interactive Resource
Lesson Plan
Map
Moving Image
Oral History
Person
Physical Object
Service
Software
Sound
Still Image
Text
Website
Search By Tags
Featured/Non-Featured
Select Below
Only Featured Items
Only Non-Featured Items
Geolocation Status
Select Below
Only Items with Locations
Only Items without Locations
Geographic Address
Geographic Radius (miles)
Search by Exhibit
Select Below
Victoria by the Bay
Employee Interviews in 1998
Chinese Workers
Industrial Outpost on the Pacific
Living in the Company Town
High Explosives Enable Modern Life
San Pablo Bay
Refugio Valley
Town Incorporation
The Historic District of 1988
Investment and Expansion
Site Topology, Geology and Hydrology
Establishment and Early Operation
Transportation
Buildings of the Works
Maturity and Transition
Closure & Land Sales
Labor at the Hercules Works
Indigenous Settlement
European Settlement
Herculean Newsletter 1977-1979
California the Cradle of the Dynamite Industry
Quarter Century Club
Rocks and Soils
Hills and Valleys
Bay Shore
Land Use Policy for the Residential City
Discovery and Development of High-Order Explosives
Monopoly Power in the Explosives Trade
Markets for the Early Explosives
Markets for Explosive Products