Assessing Risk After a Massive Oak Failure in Houston

When a Co-Dominant Oak Splits: Evaluating the Survivor

An 8-foot diameter oak in a Houston backyard revealed itself as two fused trunks when half fell. The remaining trunk now lacks the structural support of its partner, raising concerns about its stability.

Immediate Steps

1. Contact Local Experts: The Houston Regional Forestry Council (directory) maintains a list of certified arborists.
2. Texas A&M Forest Service Urban Foresters: Mickey Merritt (713-688-8931, mmerritt@tfs.tamu.edu) or Dallas Singleton (713-688-8932, dsingleton@tfs.tamu.edu) can provide guidance or referrals.

Risk Factors for the Remaining Trunk

• Loss of buttressing root support on the fallen side.
• Potential decay at the fusion zone.
• Altered wind loading on the remaining crown.

A qualified arborist should perform a Level 2 or 3 risk assessment (ANSI A300) including root crown excavation and possibly sonic tomography to quantify internal decay.