Advanced Dredging Techniques Part 1:
Finding and Recovering Pay-streaks
by Dave McCracken
Advanced Dredging Techniques Part 1
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| Introduction |
17
|
| Pay-streaks, What They Are |
23
|
| Major Flood Storms |
23
|
| Different Kinds of Streambed Deposits |
29
|
| Tailrace & High Bench Bleed-offs |
29
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| Pay-streaks |
31
|
| Single Deposits |
35
|
| The General Path of Gold |
37
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| The Characteristics of Pay-streaks |
44
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| How the Size of a Waterway can Affect Pay-streaks |
49
|
| The Boundaries of a Pay-streak |
51
|
| Flat Rocks |
58
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| Natural / Virgin Streambeds |
59
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| Sampling is the Key to Success |
63
|
| Dredge Size |
64
|
| Choosing an Area to Sample |
68
|
| Gathering Data |
74
|
| "No Gold" Reports |
81
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| Exaggerated Data |
84
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| Sampling Procedure |
86
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| Reading Streambed Material |
90
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| Depth of Material in Sampling |
96
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| Sampling Difficulties & How to Overcome Them |
103
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| False Certainties |
110
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| Gold Dredging Procedure |
113
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| Defining Acceptable Ground |
113
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| Dredging Up Pay-streaks |
115
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| Spotty Pay-streaks |
131
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| Fine Gold Pay-streaks |
134
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| Wasting Gold |
136
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| "It Has Already Been Dredged!" |
137
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| Dredge Sizes & Suction Hose |
143
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| Fast Water |
145
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| Fast Water Harness |
150
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| Maintenance and Repairs |
152
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| Dealing with Gold, Claims, & Partners |
153
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| Splitting Up Gold |
162
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| Dealing with Claims |
164
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| Percentage Deals |
167
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| Keeping Quiet |
170
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| Integrity & Gold |
171
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| Group Dredging |
177
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| Partnerships |
179
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| Partnership Deals |
180
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| Grubstaking |
182
|
| Over-manning an Operation |
185
|
| Watch Out for the Con Artist! |
189
|
| Buying Claims |
189
|
| Buying Used Dredging Equipment |
191
|
| Selling Your Gold |
192
|
| Advanced Recovery Systems |
195
|
| Riffles & Classification |
197
|
| Larger-sized Dredges |
205
|
| Triple-sluice Recovery Systems |
206
|
| Double-sluice Recovery Systems |
210
|
| Screened-over Riffles |
212
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| High-grade Riffles |
215
|
| A Few Other Points on Recovery |
216
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| Dual Eductors & Gold |
216
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| Flared Jets & Gold |
218
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| Alaskan Dampers |
219
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| Miner's Moss |
219
|
| Sun Screen Riffles |
220
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| Glossary |
221
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