Landfill Closure & Cover Soil Capping Soil Capping Matrix
in Texas

Texas terrain demands aggressive geotechnical intervention. The expansive clay subsoils—predominantly Houston Black and related Vertisols—are defined by severe shrink-swell capacity. During the intense, short-duration storm events characteristic of the region, these clays resist immediate moisture penetration. This creates a high-velocity runoff coefficient that generates extreme hydraulic shear, stripping unbonded seed, mulch, and weak agricultural tackifiers directly off the slope. When bare soil on a large-scale earthwork is exposed, TCEQ runoff regulations require immediate, structurally sound stabilization to prevent catastrophic sediment loading into local watersheds. Water and conventional crimped straw will not hold this topsoil against sheet erosion.

Operational Constraints for Landfill Closure

Daily and intermediate landfill covers face severe wind erosion, off-gassing, and strict regulatory leachate controls. Loose soils blow offsite or wash into drainage systems, instantly triggering compliance violations. The objective is to seal the surface without adding excessive weight or moisture to the waste mass. You need a high-viscosity hydraulic hydro-cap that forms a durable crust over the refuse. The polymer must lock in dust and aggressively repel rainwater to prevent it from infiltrating the cell and increasing the site's expensive leachate treatment volume.

Meeting TxDOT Item 164 Specifications

OHRA ViscoLok anchors seed and mulch directly to the subsoil, providing the rain-fast shear strength required by TxDOT Item 164. Its microplastic-free botanical hydrocolloid network forms a 3D matrix. It resists high-velocity storm runoff and keeps synthetic toxins out of the watershed.

The matrix prevents "fisheye" lumping inside your hydroseeder pump. This stops pump cavitation and reduces friction head loss. You maximize your tank's spray payload and eliminate constant agitation adjustments on the job site.