Princeton Hydro LLC

Princeton Hydro LLC, a Trenton, New Jersey-based environmental and engineering consulting firm, operates as a prime contractor delivering geotechnical investigations, water resources engineering, ecosystem restoration design, and NEPA assessment services to the U.S. Army Corps of Engineers and Department of the Interior across 100 federal contract and grant awards totaling $180.3 million in combined potential value. The firm is structured as a for-profit limited liability partnership and competes predominantly in full-and-open procurements, with no small business set-aside posture across its prime footprint, although it holds a named subsidiary — Princeton Hydro - Baird Joint Venture LLC, a self-certified small disadvantaged business joint venture — and it qualifies for set-aside vehicles such as a $25 million DOI Fish and Wildlife Services multiple-award MATOC designated Total Small Business.

Princeton Hydro's customer concentration is heavily concentrated in the Army Corps of Engineers across multiple districts. The top five customer agencies account for 60% of awards by count and 97% of combined potential value. The Corps dominates both metrics: the generic "Department of the Army Corps of Engineers" entity accounts for 11 awards and $63 million; USACE New York District has 28 awards and $42.5 million; USACE Baltimore District has 9 awards and $37.1 million; USACE Philadelphia District has 9 awards and $7.2 million; and the Department of Interior Fish and Wildlife Service Region 9 Headquarters holds a single $25 million contract. The two rankings align sharply — the Corps is both the volume leader and the dollar leader — with the Fish and Wildlife multiple-award MATOC anchoring the potential-value share.

Princeton Hydro's primary contract vehicles are five multi-million-dollar indefinite delivery contracts. The Blanket Purchase Agreement INR06PB810231 carries 22 task orders valued at $4 thousand combined; IDC W912DS14D0001 has 21 task orders worth $12.9 million; IDC W912DS19D0003 includes 12 task orders totaling $10.3 million; IDC W912BU21D0003 holds 11 task orders valued at $3.8 million; and IDC W912DR20D0015 encompasses 8 task orders worth $13.7 million. Princeton Hydro also holds a $50 million small-business multiple-award IDC with USACE New York District (awarded April 1, 2022, through May 15, 2027) for architect-engineer services supporting navigation, coastal flood risk management, and ecosystem restoration; a $5 million single-award IDC with USACE Philadelphia District for geotechnical services (through September 15, 2026); and a $2.29 million multiple-award Other Transaction IDV with USACE issued September 29, 2025, for evaluating innovative habitat control measures in Presque Isle Bay, Lake Erie.

Representative delivery-order work spans coastal engineering, dam removal, and freshwater ecosystem management. A $4.2 million firm fixed-price delivery order from USACE Baltimore District (September 30, 2024) covers the Atkisson Dam Removal project in Bel Air, Maryland, including geotechnical investigations and construction oversight through October 30, 2026. A $1.67 million delivery order from USACE New York District (February 13, 2026) provides design services including finalization of 100% plans and specifications, support during advertisement, engineering support during construction, and permit management support for a project in Jersey City extending through September 9, 2032. A $1.41 million delivery order from USACE Baltimore District (September 27, 2024) covers Van Bibber Dam Removal in Harford County, Maryland, with completion targeted for October 27, 2026. A $1.41 million firm fixed-price contract from USACE Engineer Research and Development Center (September 30, 2024) supports Year 2 of a Commercial Solutions Opening effort to evaluate innovative treatment strategies for controlling harmful algal blooms in Lake Hopatcong, New Jersey, running through September 30, 2026. An $860,643 delivery order from DOI Fish and Wildlife Service Region 5 (August 22, 2023) provides feasibility study and design services for the NJ-Cole's Mill Dam project with completion scheduled for June 30, 2026.

Activity has declined modestly over the past five years — 8 awards in 2022, 5 in 2023, 7 in 2024, 6 in 2025, and 2 year-to-date in 2026 — with six awards totaling $14.7 million in combined potential value reaching ultimate completion within the next twenty-four months, creating moderate recompete exposure. Obligated dollars to date represent 25% of combined potential value, indicating significant future task-order pipeline against the held vehicles. Service Contract Inventory data is sparse for Princeton Hydro, capturing only $289 thousand in SCI-reportable invoiced revenue in FY2024 across 0.3 FTEs on federal service contracts above the reporting threshold; this represents a small slice of the firm's total federal activity and does not reflect the majority of its delivery-order work. On the two SCI-reportable prime records, government-paid hourly rates ran at a median of $189.62 per hour, with 30% of contractor hours subcontracted across four named subcontractors.

Princeton Hydro operates as a prime on 99% of recent awards, with one grant sub-award under the Hudson River Foundation for Science and Environmental Research (Passaic River Shoreline Repair and Park Enhancement Grant, Kearny, New Jersey, January 1, 2025). The firm's capability portfolio centers on the intersection of geotechnical services, hydrological assessment, environmental design, and civil works project delivery — work that aligns with USACE's national missions in coastal storm risk management, navigation, and ecosystem restoration and with DOI's focus on water resources and habitat management across the Northeast corridor.

An water resource and geotechnical consulting firm, The firm provides services for the treatment and control of invasive plant species. Has a full service geotechnical laboratory.