2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

Photo 1. Entering river with vibratory hammer attached to excavator

Photo 2. Hammering piles to refusal

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 3. Excavating trench for first piece in bottom layer of jam

Photo 4. Insertion of first piece

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 5. Installation of second layer including rootwads

Photo 6. Continuation of second layer construction

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 7. Packing of large voids with slash

Photo 8. Continuation of second layer construction

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 9. Utilizing long-bit hammer drill to bore threaded steel rod attachment holes

Photo 10. Nut threaded onto steel rod securing lateral piece to pile

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 11. Threaded steel rod showing between lateral piece and pile

Photo 12. Complete jam top-dressed with native alluvium

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 13. Lateral view of completed jam

Photo 14. View from atop jam, looking upstream

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 15. View of jam at the Brown Bridge Dam former impoundment (Boardman River)

(2017)

Photo 16. Jam built at upstream end of Boardman Dam impoundment, less than one

growing season (2017)

2018 Boardman River Log Jam Installation Photo Sequence-Boardman Dam Former Impoundment

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Photo 17. View of jam construction machine access site after less than one year’s growth

(Little Manistee River)

**Please note that the examples of other jam construction project sites utilizing heavy

equipment are included to illustrate recovery of the construction site post-construction. The

site depicted in the Boardman Dam impoundment bottomlands represents a very raw

condition in which very little stabilizing vegetation has had time to grow.

The Pine River project shall utilize best management practices to minimize the level of excess

sediment entering the river both during and after construction (see photo 15).

Heavy machinery utilized in the above projects had been power washed to remove potentially

aggressive and nuisance exotic weed seeds as well as petroleum residue. The petroleum-based

hydraulic fluids were all replaced with biodegradable hydraulic fluid in case of line rupture-this

will also be the case with the proposed Pine River project.