In construction · Rock Hall, MD
Rock Hall Wastewater Treatment Plant
Enhanced Nutrient Removal Upgrade
Rock Hall is upgrading its existing wastewater plant to remove more nitrogen and phosphorus before treated water reaches Gray’s Inn Creek and the Chesapeake Bay. Construction is being phased around the operating plant. [4] [6]
- Town-reported project investment [1]
- $31.39M
- Existing plant design capacity [2]
- 480,000 gal/day
- Residents served · 2022 [3]
- 2,961
- Discharge permit [3]
- MD0020303
Why it happened
The Town is adding Enhanced Nutrient Removal to a plant that already serves Rock Hall and surrounding sewer customers. Reducing nutrient discharge matters downstream in Gray’s Inn Creek and the Chesapeake Bay. The Town assembled seven funding sources for the upgrade, including state and federal assistance. [1] [2] [4]
What’s being built
The project adds a post-anoxic reactor and denitrification filters to remove nitrogen. It also upgrades screening and grit removal, rehabilitates existing clarifiers, and improves disinfection and sludge handling. New process equipment, yard piping, and plant controls tie the upgraded systems into the existing facility. [5]
Construction progress
M2 shared photos of a concrete placement in April 2026. [7]
By October, work included excavation for the denitrification filters, rehabilitation of Clarifier No. 2, and foundation work for the dewatering building. The field work is sequenced around the treatment units the Town needs to keep in service.
Project team
- Owner and operator
- Town of Rock Hall [2]
- Design engineer
- George, Miles & Buhr, LLC [6]
- General contractor
- M2 Construction, LLC [6]
- Senior superintendent
- Greg Lyons, M2 Construction [6]
My role
I’m the project manager for M2 Construction. I coordinate procurement, the construction schedule, and field sequencing with the superintendent, the engineer, and the plant team. [6]
Project photos
Site location
Start at the treatment plant and zoom out to see where it sits in relation to Gray’s Inn Creek and the Chesapeake Bay.
Project records
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Town of Rock Hall · State of the Municipality
The Town’s reported project investment and seven funding sources.
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Maryland Board of Public Works · Funding agenda, Item 18
Existing treatment capacity and the state revolving loan for the upgrade.
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EPA · 2022 Clean Watersheds Needs Survey
The Rock Hall survey record lists 2,961 residents served and discharge permit MD0020303. View Rock Hall survey data (JSON)
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Maryland Department of the Environment · Clean water funding
Receiving waters and grant support for the upgrade.
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Rock Hall WWTP ENR Upgrade · Public bid scope
New process structures, rehabilitation, disinfection, solids handling, and controls.
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M2 Construction · Project kickoff
A 2008 aerial view of the plant, site mobilization photos, project partners, and field leadership.
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M2 Construction · April 2026 progress update
Photos and crew credit for the concrete placement.