Measure and roll an asset retirement obligation

The capital plan contains a $500,000 line for dismantling a site in 5 years. The liability analysis begins elsewhere: with the law, contract, obligating event, and unit of account that the budget does not supply.

Recognition precedes measurement

Build a scope memo from the law, regulation, contract, ownership or operating facts, obligating event, unit of account, and enforcement analysis. Distinguish a present legal obligation from an intention, policy, future operating choice, or broader environmental and exit-cost issue.

The Linden Peak exercise stipulates a qualifying legal obligation. That allows measurement practice without asking students to infer law from a budget. In real work, unresolved legal scope is a stop condition, not an invitation to calculate a provisional ARO and hope the number answers recognition.

Make the scenario set auditable

Each settlement scenario needs a cash-flow amount, timing, probability, price- level convention, engineering scope, and evidence owner. Scenarios must be mutually exclusive and collectively complete for the bounded calculation; probabilities must sum to one.

Linden Peak's supplied $400,000 at 70% and $520,000 at 30% produce a $436,000 probability-weighted cash flow. Discounting 5 years at the supplied 6% rate produces $325,804.56. The calculation does not select the rate or prove scenario completeness.

Connect the initial entry

At initial recognition in the bounded model:

Debit   Related tangible asset—retirement cost   $325,804.56
Credit  Asset retirement obligation              $325,804.56

The debit connects the obligation to obtaining service from the related asset. It is subsequently depreciated or depleted with that asset under its supported service pattern.

Keep two clocks after day one

The asset retirement cost decreases through depreciation or depletion. The liability increases through accretion and changes through supported revisions or settlement. Neither clock substitutes for the other.

After one year at 6%, Linden Peak records $19,548.27 accretion and carries the ARO at $345,352.84. The model rolls the unrounded $325,804.5633696 initial measure forward and rounds only displayed currency; adding the two separately rounded display rows produces a one-cent presentation difference. The workbook retains full precision and exposes that convention. Depreciation or depletion does not debit or credit the liability. A rollforward should separately display opening balance, accretion, new obligations, revisions, settlements, and ending balance.

$325,804.5633696 opening ARO × 6% = $19,548.2738022 accretion
$325,804.5633696 + $19,548.2738022 = $345,352.8371718 ending ARO
displayed: $325,804.56; $19,548.27; $345,352.84

Revisions and settlement

New engineering or timing evidence can change expected cash flows. Identify which cash-flow layer changed, when the evidence arose, and which rate/current- guidance requirements apply; do not overwrite the original measurement cell. At settlement, compare the liability relieved with actual supported settlement consideration and explain the difference under the applicable guidance.

If the obligation is conditional, disputed, environmental rather than tied to asset retirement, or altered by a new legal interpretation, return to the recognition memo. Do not stretch the two-scenario measurement merely because it is available. The disputed premise, not the discount formula, is then the work.

Exit check

Given a contract excerpt, engineering scenarios, dates, probabilities, and rates, prepare a recognition memo, initial measurement, entry, asset allocation link, three-year liability rollforward, and settlement bridge. Mark every fact that is supplied rather than verified and state what would make you stop.