Section 287.220.1 RSMo creates the Second Injury Fund and provides when and what compensation shall be paid from the fund in "all cases of permanent disability where there has been previous disability." For the Fund to be liable for permanent total disability benefits, employee must establish that: (1) he suffered a permanent partial disability as a result of the last compensable injury; and (2) that disability has combined with the prior permanent partial disability to result in total permanent disability. ABB Power T \& D Co. v. Kempker, 236 S.W.3d 43, 50 (Mo. App. 2007). Section 287.220.1
requires us to first determine the compensation liability of the employer for the last injury, considered alone. Landman v. Ice Cream Specialties, Inc., 107 S.W.3d 240, 248 (Mo. 2003). If employee is permanently and totally disabled due to the last injury considered in isolation, the Fund has no liability. Id.
We have credited employee and employee's wife as to the effects of the last injury. That testimony strongly suggests that the work injury, considered in isolation, is the source of employee's permanent total disability. We have found that employee's preexisting asymptomatic and non-disabling condition at L5-S1 helps explain why the work injury was so severe, but this finding alone cannot shift liability for employee's permanent total disability from employer to the Second Injury Fund. To the contrary, well-settled principles of applicable case law require that employer is liable in these circumstances:
Preexisting conditions are not denominated 'disabilities' as of the date of the second injury simply because, at some point in the future, they combine with that injury to render the claimant permanently disabled. As between the employee and employer, a preexisting but non-disabling condition does not bar recovery of compensation if a job-related injury causes the condition to escalate to the level of disability. If substantial evidence exists from which the Commission could determine that the claimant's preexisting condition did not constitute an impediment to performance of claimant's duties, there is sufficient competent evidence to warrant a finding that the claimant's condition was aggravated by a work-related injury.
Portwood v. Treasurer of Missouri-Custodian of the Second Injury Fund, 219 S.W.3d 289, 293 (Mo. App. 2007) (citations omitted) (emphasis in original).
We have found that employee did not suffer any preexisting permanent partial disability referable to the low back. We have found that the work injury, considered in isolation, results in limitations that Ms. Shea credibly opined would take employee out of competition for normal employment in the open labor market. It follows that employee is permanently and totally disabled owing to the effects of the work injury considered alone.
We conclude that employer, not the Second Injury Fund, is liable for permanent total disability benefits.