HENDERSON Environmental Design-Build Professionals are highly experienced in federal, state, and local permitting.  Our professionals have developed strong working relationships with regional land management agencies, generating effective and efficient issuance of required permits.  Project types permitted include levee building and breaching, fish passage improvement, tidal slough excavation, large wood installation, invasive species management, off-channel fish refugia, estuarine plant community diversity and structural restoration, and signage installation.  We also have experience gaining U.S. Army Corps of Engineers Section 408 permit approval. HENDERSON’s design and construction efforts are done in accordance with permitting guidelines, developed from our 19 years’ of experience as a leader in aquatic restoration design and construction.


Big Eddy Recreation Area Bio-Engineering Demonstration


Fanno Creek Trail Embankment Stabilization


Johnson Creek Habitat Assessment

Otter Point Estuarine Habitat Restoration


Rock Creek Confluence Stream Restoration Design-Build, Clackamas River

South Fork Klaskanine Dam Removal

South Fork Klaskanine River_hatchery diversion post constuction

Springbrook Creek Fish & Wildlife Passage & Channel Restoration


Whychus Creek Irrigation Dam Removal & Channel Restoration

Whychus Creek Irrigation Dam Removal and Channel Restoration

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