Carbon Accretion & Riparian Benefits (CARB)

– Red River Pilot Project

Carbon Accretion and Riparian Benefits (CARB) is a group forestry-based carbon capture project spanning over 18,000 acres (12,183 forested acres) of land across Arkansas, Louisiana, Oklahoma, and Texas. The goal of the project is to provide a mechanism to aggregate tracts of land with similar forest types to create larger conservation corridors. The pilot project began in 2022 with the enrollment of 14 initial landowners. To date, over 200,000 hardwood seedlings have been planted. Over 30,000 metric tons of CO2e is estimated to be sequestered annually within the pilot project area (almost 1MM tons in the project baseline). A baseline carbon inventory report was submitted in July 2023 and initial credit issuance was approved in October 2023. Generating revenue via land use practices that enhance carbon capture in natural sinks provides an incentive for adjacent landowners to participate in the project, while encouraging broader adoption of conservation practices as new tracts are enrolled annually. Through these annual enrollments, the project will continue expanding to link forested areas to form conservation corridors along the Red River, its tributaries, and their adjacent wetlands. CARB is designed to be complementary to the USDA Agricultural Conservation Easement Program (ACEP), which includes Agricultural Land Easements (ALE) that have established forestry-based conservation practices on easements across the project region. In response to historic regional deforestation, these easement programs have effectively replanted or protected native hardwood forests, thereby preventing the conversion of these working lands to non-agricultural uses. The resulting patchwork of conservation easements presents an opportunity for aggregation of both ACEP lands and adjacent tracts to create a broader habitat protection project. Additionally, over 60% of the acreage enrolled in USDA-ACEP that were measured as part of the baseline study will require active intervention to successfully reestablish native hardwood timber stands. Beyond these ACEP easements, a wide variety of managed and unmanaged timber exists in the region; however, this pilot project is strategically focused on the following forest types: – Reforested agricultural lands; – Native bottomland mixed hardwood stands; – On-going afforestation, reforestation, and revegetation (ARR) opportunities; and – Commercially managed forests adjacent to the forest types above. Grouping these forest types that exist in similar settings to the ACEP easements encourages the expansion of conservation corridors over time. Properly stratifying each participating tract added to the project over time will allow for increased statistical confidence in the mean carbon inventory and accrual rates within each strata of the group project. The CARB project development leverages revenues generated from the voluntary carbon credit market and connects privately owned tracts to protect and enhance riparian habitats. Participating landowners receive 60% of net credit revenue and the payment structure incentivizes owners to improve newly planted, recently converted or existing bottomland hardwood stands into more resilient stands, which contain highly durable stocks of forest-based carbon and provide many other co-benefits. (Link to CARB project documentation)

United States: Four States Region of Arkansas, Louisiana, Oklahoma and Texas

Up to 55-year evergreen crediting period contract with participating landowners (Link to CARB project documentation)

July 2022

26,000 interim credits issued in October 2023 (2023 Vintage). Group project with annual credit issuance that varies based on on-going enrollments

Improved Forest Management (imbedded reforestation projects)

Up to 55 year crediting period with 10 year residual monitoring (

BCarbon Pilot Project with 3rd Party biometrician review (Auburn University Staff)

Over 30,000 Mt/CO2e of modeled annual removal capacity, with 26,000 digitally minted removal credits. (Pilot data not inclusive of over 8,500 MtCO2e/acre of annual belowground carbon accruals)

Accountability Measures

In lieu of project buffer pool, BCarbon requires bonding to cover potential reversals at an mutually agreed level (20% basis for pilot project)

Project materiality monitoring requires all owners to report any reversals (intentional or unitentional) over 5-acres. At the project level, Carbon Rho completes interim desktop reviews between field measurment of test plots and reports any material losses to the group project baseline that exceed 5-percent of annual project sequestrations (e.g. annual removal basis for material losses).

Landowner must cure breech of contract by restoring intentional reversal to make the group project pool of credits whole.

Emission reduction credits are not created using the BCarbon Forest Carbon Protocol; rather, the forward looking protocol only allows for quantification and certification of future carbon removal credits.

Pertinent Data and Calculation Methods

Improved Forestry Management Protocol with imbedded afforestation/reforestation tracts. Static baseline; however, baseline is not used as basis for generating avoided emissions credits, as all crediting is based on future measured drawdown of CO2. 5-Year measurement and net carbon accounting process includes ex ante and ex post modeling of interim carbon removals via the US Forest Service Forest Vegetation Simulator (e.d. ex post allow for true-up accounting). BCarbon Forest Carbon Protocol

Annual ex-ante modeling with 5-year measurement and net carbon accounting/true-up frequency (US Forest Service – Forest Vegetation Simulator; See 2023 project baseline report link above)

Supplemental Voluntary Carbon Market Disclosures

Primary Attributes

18,060 (deeded) and 12,183 (forested)

Potential to impacts up to six unique ecoregions, including Texas blackland prairies; East central Texas plain; South central plains; Ouachita mountains; Arkansas valley and Mississippi alluvial plain

Alluvial floodplain and adjacent riparian habitat

Varies (see baseline carbon inventory)

Varies (see baseline carbon inventory)

1) Riparian habitat & biodiversity (restoration, protection, and/or enhancement); (2) UN SDGs – 6,13,14,15,16 ; (3) Water quality; (4) Soil erosion control; (5) Recreation (6) Aesthetics & tangible/intangible ecosystem services

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