DQM Specifications

The DQM specification is now a single, comprehensive document covering the monitoring, reporting, and compliance requirements for all dredge plant types. Because the equipment used can change over the course of a project, every contract receives the same comprehensive specification.

Where the specification lists options or variables, only the options called out for use in a given contract are applicable.

Every specification references DQM in a single paragraph that lists all plant types. The only selection an author makes is the applicable data profile for pipeline and scow. A template is shown below:

[Paragraph #] - [Section Title]

For the dredging, transport, and deposition of all dredged material, the Contractor shall operate under the requirements of the National Dredging Quality Management (DQM) Program. The Contractor shall reference the appropriate paragraphs for all plant types utilized. Requirements vary by plant type and, where applicable, by data profile. The following plant types and profiles are in effect for this contract:

• Hopper
• Pipeline (select Standard or Small Business profile)
• Mechanical
• Scow (select Monitoring or Ullage profile)

Completed example: "…in effect for this contract: Hopper, Pipeline (Standard profile), Mechanical, and Scow (Monitoring profile)."

The reporting profile that applies to a vessel is set in the base language of its governing contract or permit, and it determines which sensor values must be reported to DQM. Hopper and mechanical dredges report under a single profile. Pipeline dredges and scows each have two profiles, differing only in the sensors described below. For complete documentation on all sensors required, review the full DQM Specifications.

Pipeline Dredges

• Standard - The base profile for pipeline dredges, which includes an array of sensors that provide information on location and activities.
• Small Business - Includes all sensors from the standard profile, however Slurry density and velocity instrumentation are not required. A dredge already outfitted with these meters must still report their data; the profile only removes the obligation to install the instrumentation if the dredge is not already equipped.

Scows

• Monitoring - The base profile for scows, which includes an array of sensors that provide information on location and activities.
• Ullage - Includes all sensors from the monitoring profile and adds bin ullage sensors, which gauge the level of water or material inside the scow bin. These readings can estimate in-bin volume when dredged material self-levels, but are unreliable when the load mounds or settles unevenly.