STORMWATER & HYDRAULICS ENGINEERING

HMH Engineering provides innovative and cost-effective stormwater and hydraulics engineering solutions that protect communities and the environment. Our engineers design systems that meet regulatory requirements while addressing real-world site challenges. With offices across Idaho and western Montana, we partner with municipalities, developers, and agencies to deliver infrastructure that is resilient and sustainable.

OUR STORMWATER & HYDRAULICS SERVICES
We offer a full range of stormwater and hydraulic engineering services, including:

    • Design of stormwater collection and conveyance systems

    • Detention and retention basins

    • Culvert and bridge hydraulic design

    • Erosion and sediment control measures

    • Stormwater Management Plans for public and private developments

    • Stormwater Pollution Prevention Plans (SWPPP) for construction sites

    • Best management practices (BMP) design and implementation

    • FEMA floodplain development permitting

    • Flood studies and map revisions (LOMR/CLOMR)

    • Elevation certificates for flood insurance requirements

    • 1D and 2D hydraulic models for riverine and urban drainage systems

    • Hydrologic modeling for watershed-scale analysis

    • Culvert and bridge hydraulics analysis

OUR APPROACH
We understand that stormwater and hydraulic systems are critical to protecting infrastructure and reducing flood risk. Our team uses the latest modeling tools and design standards to develop site-specific solutions that balance performance, cost, and environmental stewardship. We work closely with clients and regulatory agencies to deliver designs that meet compliance and long-term sustainability goals.

WHO WE SERVE
Our stormwater & hydraulics engineering services support:

  • Municipalities and transportation agencies

  • Private developers and design-build teams

  • Utility providers and industrial facilities

  • State and federal agencies

We proudly serve communities throughout Idaho—including Coeur d’Alene, Ponderay, Lewiston, Meridian, Twin Falls, and Rigby—and now western Montana through our Missoula office.