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Table 3 Recurrent cost each year for a Wood Vault unit

From: Wood Vault: remove atmospheric CO2 with trees, store wood for carbon sequestration for now and as biomass, bioenergy and carbon reserve for the future

Carbon stored per year

total cost per unit cell per year

Land purchase

Construction

Operation (staff, management, monitoring)

Transportation

Size of a unit cell

100,000 tCO2+

$1.2–1.8 million

$25–100K

$700K++

$500K

$0–500K+++

($5/ton-25mi)

1 ha (2.5 acre)

20 m high

5 m deep

  1. +Collected from wood residuals in a surrounding region of 50 km by 50 km
  2. ++Excavation = $200K ($4/m3 × 50,000m3); material/clay = $300K ($15/m3 × 10,000m3); work/QC = $200K
  3. +++Transportation would be at no cost to the facility if accepting wood
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Carbon Balance and Management

ISSN: 1750-0680

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