Seaholm Residences

Holt Engineering is fully equipped to perform deep borings for geotechnical surveys and obtain soil and rock samples in the field. Our firm has two CME 55 truck mounted drilling rigs with 250 gallon water tanks, winches, flight augers, hollow stem augers and NXB wireline coring system for drilling and continuous sampling to depths of 180 feet. Included in our drilling equipment is hydraulic hammers for performing standard penetration tests, Shelby tube samples for obtaining undisturbed samples, pocket penetrometers to estimate soil strength, grout pumps, mixing tanks, portable water tank and electronic water level indicators.

Jollyville Water Transmission Main

Holt Engineering, Inc. strictly follows the guidelines set forth from the governing agencies for drilling borings and backfilling bore holes. Our drillers are licensed to install and plug monitor wells and/or piezometers and are familiar with submitting well and plugging reports to the Texas Department of Licensing and Regulation as required by the Texas Water Development Board.

Balcones Canyonland Preserve

Many underground utilities installed in and around Austin are located in environmentally sensitive areas such as the Edwards Aquifer Recharge Zone and the Balcones Canyonlands Preserve. Highly fractured limestone rock is found in these areas that allow for large quantities of water to flow into the Edwards Aquifer. In addition, these areas contain known caves and endangered species that are protected by the U.S. Fish and Wildlife Services. Our drillers are licensed and totally familiar with the rules and regulations of the Texas Water Well Drillers Board and the Barton Springs Edwards Aquifer Conservation District. Our licensed geologists have over 30 years experience logging the complex geological formations found in and around central Texas.

Horseshoe Bay Residence

A geotechnical investigation for a proposed residence involves drilling bore holes to determine subsurface soil, rock and groundwater conditions. Samples are retrieved during drilling and laboratory testing is conducted in order to determine the engineering characteristics of the subsurface conditions. Foundation design recommendations are provided based on the soil/rock conditions below the building footprint and may consist of shallow slab-on-grade footings, drilled piers, driven piles, mat foundations or a post-tensioned slab foundation.

Geotechnical Data Reports (GDRs) are used for underground pipeline projects in order to provide subsurface information to the design engineers and contractor where the proposed pipe will be installed by trenchless construction methods. These methods include tunneling, guided boring, directional drilling, pipe bursting and pipe and jacking. Holt Engineering has over 20 years providing this type of geotechnical investigation and is fully familiar with meeting the Requirements for Geotechnical Investigations for Pipeline Projects spelled out in the COA Utilities Criteria Manual.

Austin Bergstrom International Airport

Holt Engineering maintains a license to drill in streets and right-of-ways in the City of Austin and is familiar with obtaining street cut and ROWMAN permits required by ABIA, COA, TxDOT and the surrounding municipalities. Holt has provided hundreds of concrete and asphalt pavement thickness designs and construction considerations for large arterial roadways, highways, local subdivision streets, ABIA taxi-ways and parking lots. Holt’s approach in recommending pavement design thicknesses is to provide various design options that will be cost effective and that will meet or exceed the required design life of the pavement. Pavement options for full-depth reconstruction and section overlays will be provided and to help reduce the cost of haul off, in-place recycling of the asphalt and base may be considered. Other options that may be considered are cement stabilization of existing base and subgrade lime stabilization to help reduce the deleterious effects of the highly expansive clay soils.

Barton Springs Pool

Holt Engineering is capable and highly experienced in conducting geotechnical drilling in difficult, constrained locations and highly protected areas such as Austin’s most beloved swimming pool. Drill rigs and equipment are steam cleaned before entering the site and all precautions are taken to protect large trees and the Springs such as driving on plywood to protect well-manicured lawns and large trees and providing spill control methods to prevent any drilling fluids from entering the pool.