Executive Team

Eric R. Friedrich, P.E., CFM


B.S. Civil Engineering, University of Texas, 1983

Mr. Friedrich has over 32 years of professional experience in project management and engineering analysis/design of water resources and transportation projects.  His extensive experience includes all phases of project development, from preliminary engineering to PS&E development for highway and bridge projects, with particular expertise in hydrology and hydraulics analysis and design.

In 2001, Mr. Friedrich founded H & H Resources, Inc. (HHR).  Prior to launching HHR, Mr. Friedrich gained valuable experience during his 11 years at TxDOT as Hydraulics Engineer in the TxDOT Bridge Division and later in the Central Design Section of the Fort Worth District.  Mr. Friedrich was instrumental in editing revisions to the Department’s Hydraulic Manual and other drainage design guides, developing course material, and ultimately rolling out the drainage design sections of the statewide in-house Level I, II, and III training program where he also served as instructor.

Through his TxDOT and consulting engineering experience, he has provided drainage impact mitigation studies; analysis and design of culverts, bridges, storm sewer systems, open channels and ditches, detention ponds, erosion and sediment control systems, and pump stations; analysis for bridge scour; and floodplain/floodway coordination with FEMA. Modeling expertise includes THYSYS, WinStorm, HEC‑1, HEC-HMS, HEC‑2, HEC‑RAS; SCS TR-20, WSP-2, USGS PeakFQ, Geopak Drainage and EPA SWMM.  Mr. Friedrich served as course developer and instructor under contract with Texas Engineering Extension Service and University of Texas at Arlington, teaching hydrology and hydraulics design to TxDOT personnel.

Mr. Friedrich has been involved in the development of the following technical publications, standards development, and policy-generation:

  • TxDOT Bridge Division Hydraulic Manual 3rd Edition, 1985
  • AASHTO Task Force on Hydrology and Hydraulics, 1985 – 1990
  • TxDOT Bridge Scour Evaluation Program, 1990
  • TxDOT IH 10 Katy Freeway Reconstruction Program, Drainage Design Criteria, 2001-05
  • Texas Engineering Extension Service, Professional Development Training Program, Hydrologic and Hydraulic Design for Culverts and Storm Drains, 2003-04.
  • TxDOT US 290 / Hempstead Corridor Program Management, Drainage Design Criteria, 2006-09

Mr. Friedrich is a member of the Texas Floodplain Management Association (TFMA).