Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Dredging and Sediment Management
Guam Deep Ocean Disposal Site (G-DODS)
On this page:
- Introduction
- Disposal Site Information & Final Rule
- Supporting Documents
- Final EIS
- Public Meeting Presentation Slides
On September 8, 2010 EPA published the Final Rule designating G-DODS as the newest ocean disposal site in Region 9. Previously, all sediments from Port, Navy, or other dredging projects around Guam had to be disposed on land where capacity is limited. G-DODS provides an additional option for managing dredged sediments when other options aren’t available. This site was chosen after two years of evaluation as the location that best avoids environmental impacts while still being close enough to Guam to be affordable to use. As with all of EPA’s other dredged material disposal sites, only projects having clean (non-toxic) dredged material may be permitted to use G-DODS, and only when project-specific alternatives (including beneficial reuse) are not practicable.
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Adobe Reader.
Disposal Site Information
Location | Approximately 11 nautical miles NW of Apra Harbor, Guam (see map) |
Center coordinates | 13° 35.500' N by 144° 28.733' E (NAD 83) |
Water Depth | 8,790 feet (2,680 meters) at center |
Overall Size | 7.1 square nautical miles [3 nautical mile (5.6 kilometer) diameter on seafloor] |
Shape | Circular |
Surface Disposal Area | 3,280 feet (1,000 meter) diameter circle at center of overall disposal site |
Volume Limit | 1.0 million cubic yards (764,555 cubic meters) of suitable dredged material per calendar year |
Supporting Documents
Final EIS
- Cover Title Abstract (PDF) (14 pp, 278K)
- Executive Summary (PDF) (12 pp, 994K)
- Chapter 1 (PDF) (12 pp, 562K)
- Chapter 2.0 - 2.2 (PDF) (7 pp, 508K)
- Chapter 2.3 - 2.9 (PDF) (9 pp, 329K)
- Chapter 3.0 - 3.1.2 (PDF) (3 pp, 282K)
- Chapter 3.1.2 - 3.1.5 (PDF) (50 pp, 3.1M)
- Chapter 3.1.6 - 3.1.7 (PDF) (18 pp, 867K)
- Chapter 3.2 - 3.3 (PDF) (45 pp, 844K)
- Chapter 4 (PDF) (52 pp, 4.2M, Large File)
- Chapter 5 (PDF) (8 pp, 372K)
- Chapter 6 and 7 (PDF) (16 pp, 219K)
- Appendix A (PDF) (210 pp, 6.2M, Large File)
- Appendices B and C (PDF) (46 pp, 1.3M)
More Supporting Documents
- Field Report, Baseline Studies Conducted for the Designation of an Ocean Dredged Material Disposal Site, Apra Harbor, Guam: Draft Report (162 pp, 4.2M, Large File)
- Zone of Siting Feasibility Study, Ocean Dredged Material Disposal Site, Apra Harbor, Guam: Final Report (57 pp, 1.2M)
- Ocean Current Study, Ocean Dredged Material Disposal Site Apra Harbor, Guam: Final Report (93 pp, 8.2M, Large File)
- Synthesis Report: 15 Years of Monitoring SF-DODS (105 pp, 1.3M) Updated June 2010
Meeting Presentation Materials
Public Meeting Presentations Slides, August 20, 2009 (PDF) (46pp, 6.4M)
Contact Information
Allan Ota (ota.allan@epa.gov)
Tel. (415) 972-3475