Miller Gray, LLC

Austin, TX

Civil Engineering Rooted in Central Texas

Services: 83
Offices: 1
Projects: 23
Leaders: 5
Founded: 2014
Size Estimate: 10-49 employees

Overview

Miller Gray is an Austin-based civil engineering firm founded in 2014 by Rachel Gray, Travis Wilson, and Dale Gray. It specializes in transportation design, water and wastewater engineering, stormwater management, general site development, and program management for public and private clients across Central Texas. Miller Gray serves municipalities, counties, state and federal agencies, and private developers in markets including healthcare, hospitality, residential, commercial, and industrial development. It holds TBPE Firm Reg. No. F-16302.

Founded: 2014
Size Estimate: 10-49 employees

Services

Transportation Design

Develops functional transportation systems to address community traffic and mobility demands. Offerings encompass roadway and intersection design, sidewalk and sidewalk connectivity enhancements, temporary traffic control planning, and drainage and hydraulic analysis for corridors, arterials, and urban streets.

Corridor and Planning Area Studies Regional Roadway and Arterial Design Urban Street and Intersection Design Pedestrian, Bicycle, and Trail Planning and Design Highway Hydrology and Hydraulics Culvert and Bridge Hydraulic Design Railroad Crossing Design Site Access and Circulation Plans Roadway Striping and Signage Plans Temporary Traffic Control Plans

Water and Wastewater Engineering

Provides analysis, modeling, and design of public and private water distribution systems, wastewater collection networks, and reuse infrastructure. Scope covers system evaluations, treatment facilities, storage tanks, and pump stations, alongside regulatory compliance assistance.

Water, Wastewater, and Reuse System Modeling Water and Wastewater Treatment Plant Design Pumping Station and Storage Tank Design Water Distribution System Evaluation and Design Inflow and Infiltration Analysis Sanitary Sewer Evaluation Studies (SSES)Lift Station Analysis and Force Main Design Wastewater Collection System Evaluation and Design Low Pressure System Design Pipe Hydraulic Analysis Rehabilitation Plans Trenchless Technology Design TWDB Funding Compliance TCEQ Sewage Collection System (SCS) Permitting Regulatory Assistance

Stormwater Management

Focuses on flood control and environmental protection through comprehensive hydrology and hydraulics analysis. Solutions include drainage master planning, watershed and water quality modeling, dam and reservoir modernization, and regulatory permitting.

Hydrology and Hydraulics 1D and 2D Modeling Watershed Modeling Drainage Master Planning TWDB Flood Protection Plan Grant Assistance Dam and Reservoir Design and Modernization Floodplain Management and Permitting FEMA Map Modernization FEMA Floodplain Delineation and Reclamation Creek and Local Flood Hazard Risk Reduction Storm Water Detention and Retention Pond Design Water Quality Analysis, Design, and Permitting Low Water Crossing Design Bridge and Culvert Scour and Channel Stability Analysis Streambank Stabilization Evaluation and Design Natural Channel Design Erosion and Sedimentation Control Plans TPDES Permitting and Stormwater Pollution Prevention Plans (SWPPP)TCEQ Water Pollution Abatement Plans (WPAP)MS4 Permitting

General Site Development

Delivers land planning, engineering design, and agency permit coordination for public and private projects. Expertise spans due diligence, feasibility studies, zoning support, platting, utility coordination, and construction document preparation.

Land Use Consulting Due Diligence and Property Assessment Reports Feasibility Studies Utility Extension Requests Zoning and Entitlement Support Land Subdivision (Platting) Documents and Approvals Site Plan Development, Design, and Permits Utility Coordination ROW Use License Agreements Regulatory Compliance TCEQ Coordination and Permitting USACE Section 404 Permitting Construction Documents Cost Estimating (OPCC)

Program Management and Construction Administration

Manages the full lifecycle of infrastructure programs from initial planning through final construction. Key activities include scheduling, budget oversight, QA/QC planning, bidding assistance, submittal reviews, and construction observation.

Project Delivery Analysis Schedule Development and Maintenance Budget and Cost Management Quality Assurance and Quality Control Plan Development Risk Analysis Regulatory Agency Coordination Cost Estimating (OPCC)Bidding and Procurement Services Pre-Construction Coordination Submittal Review Construction Observation Construction Contract Management Letters of Concurrence Record Drawing Preparation

Community Involvement and Outreach

Facilitates stakeholder communication and public engagement to ensure community alignment with project goals. Services include public notifications, neighborhood open house events, and 3D modeling and graphic support.

Stakeholder Identification Public Notification Public Outreach and Engagement Events Planning and Facilitation Open House Meetings 3D Modeling and Graphic Design Services

Industries

Government Federal Stormwater & Flood Control Education Multifamily Residential Residential Hospitality Healthcare Commercial Mixed-Use Industrial

Firm type

Civil Engineering Transportation Engineering Water / Wastewater Engineering

Project types

Roadway and Arterial Design Sidewalk and Mobility Improvements Water and Wastewater Pipeline Renewal Raw Water Pump Station and Transmission Main Stormwater Drainage Improvements Floodplain Studies Dam Modifications Streambank Stabilization Subdivision Site Development Police Station Site Development Surgery Center Site Development School Bridge and Drainage Design Trail Design Traffic Improvements Veterinary Clinic Site Development Commercial Site Development Manufacturing Campus Site Development Hotel Site Development

Projects

Lakeway Police Station

Public Safety

Miller Gray, LLC

Overview

Services

Transportation Design

Water and Wastewater Engineering

Stormwater Management

General Site Development

Program Management and Construction Administration

Community Involvement and Outreach

Industries

Firm type

Project types

Projects

Lakeway Police Station

Tri-Campus Sidewalk Connectivity Enhancements

Plum Creek Surgery Center

Bee Cave Middle School Bridge and Drainage Services

Brooklands Subdivision

Brodie Lane Traffic Improvements

Spicewood Vet Clinic

Bee Cave Starbucks

Atlas 14 Floodplain Study - Urban and West Watersheds

Slaughter Creek - Vassal Drive Storm Drain Improvements

Marble Falls Raw Water Pump Station and Transmission Main

Travis County Supplemental Drainage Engineering Services

Marble Falls Emergency Streambank Stabilization

Kennedy Ridge Water Supply Corporation Wastewater Improvements

Paramount Park Residential Development

Sunset Valley Dam Modifications

Great Divide Drive at Little Barton Creek

City of Austin Red Line Trail/North Walnut Creek Trail

Austin Oral Maxillofacial Surgery - Dripping Springs

Lake Travis High School Dam

ICU Medical Manufacturing Campus

East Austin Hotel

Harmon Avenue Area Water & Wastewater Renewal

Credentials and affiliations

Certifications

Awards

Public clients

Leadership

Rachel Gray

Travis Wilson

Dale W. Gray

Heidi Petmecky

Amanda Wheeless

Offices

Austin, TX 78731