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Stockton Wash Flood Retarding Structure (FRS) Rehabilitation Project
Stockton Wash FRS is an earthfill embankment dam located on Stockton Wash about 3 miles southeast of the City of Safford in Graham County, Arizona. Constructed in 1964, the FRS is part of the Frye Creek-Stockton Wash system which provides flood protection for the downstream community. Graham County (Local Sponsor) operates and maintains the FRS and is mandated by state and federal laws to comply with flood control and dam safety regulations.
The purpose of the Stockton Wash FRS is to provide flood and erosion control benefits for downstream developments (agricultural, commercial, and urban/residential areas). The FRS was designed to control runoff from the 100-year storm event. The FRS was determined to not meet current U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS) and Arizona Department of Water Resources (ADWR) dam safety and performance standards. Rehabilitation of the dam may be necessary because this watershed structure has served its 50-year service life, has not been updated to meet current dam safety standards, and yet flood protection continues to be needed for the downstream community.
NRCS has contracted with GENTERRA Consultants, Inc. to prepare a Supplemental Watershed Plan and Environmental Assessment (Plan-EA) to evaluate various alternatives, including rehabilitation and decommissioning among others, and recommend the best alternative for the structure that would comply with current safety standards while also continuing to provide the needed flood protection.
This project is being partially funded by the NRCS through the Small Watershed Rehabilitation Amendments of 2000 (Section 313 of Public Law 106-472), which authorizes technical and financial assistance to Local Sponsors to rehabilitate aging flood control dams built under the Watershed Protection and Flood Prevention Act of 1954 (Public Law 83-566) that are reaching the end of their design life and/or no longer meet federal or state safety criteria or performance standards.
NRCS has a three-phase plan. The first phase, a dam assessment, was completed in February 2005. It was determined that the dam generally is well maintained and in satisfactory operating condition aside from the inadequate emergency spillway capacity. The second phase is preparation of a Supplemental Watershed Plan and Environmental Assessment (Plan-EA), followed by a third phase of design and construction.
The first public meeting will be held where NRCS, Sponsor, and GENTERRA Consultants, Inc. will have the opportunity to describe the project to the general public, stakeholders, and cooperating agencies so that they would have the opportunity to provide comments, concerns, and/or suggestions associated with the various alternatives under considerations including a full rehabilitation of the structure to help us identify the important issues early in the planning process. Details for the public meeting and public comment period are shown below.
Stockton Wash Flood Retarding Structure Fact Sheet (Estructura Retardante De Inundaciones De Stockton Wash Hoja De Hechos)
PUBLIC MEETING
- Date: Wednesday, May 31, 2023 (THIS MEETING HAS ALREADY TAKEN PLACE)
- Presentation: SWFRS Public Scoping Meeting Presentation 5-31-2023 (PDF)
- Recording: SWFRS Public Scoping Meeting Recording 5-31-2023 (MP4)
- Time: 6:00 PM to 7:00 PM, MST
- In-Person Location:
- Graham County General Services Building Assembly Room
921 W. Thatcher Blvd.
Safford AZ 85546
- Graham County General Services Building Assembly Room
- Online: https://tinyurl.com/StocktonWash
- Meeting ID: 246 249 208 724
- Pass Code: UP92Ho
- Call In: +1 (469) 770-0416
- Conference ID: 280 183 380#
PUBLIC COMMENT PERIOD
- Starts: Tuesday, May 16, 2023
- Ends: Thursday, June 15, 2023
HOW TO PROVIDE QUESTIONS OR COMMENTS
- In-Person: Fill out Comment Card
- Email: kmohos@genterra.com
- Mail: Stockton Wash FRS Rehabilitation Project
c/o GENTERRA Consultants, Inc. - Kristina Mohos
15375 Barranca Parkway, Building L
Irvine, California 92618 - Phone: (949) 753-8766, Monday - Friday 9:00 a.m. to 5:00 p.m.
- Web Page: Questions/Comments Form
At a later time, the Draft Plan-EA will be posted on this website and the general public/agencies will be invited to review and comment on the proposed project during the review period. A second public meeting will be held which will describe the rehabilitation alternatives analyzed, potential impacts to the environment, and the Preferred Alternative for the project.
- Draft Plan-EA document (link to download will be provided here when available)
FACT SHEET (Hoja de Hechos)
- Stockton Wash Flood Retarding Structure (English PDF)
- Estructura Retardante De Inundaciones De Stockton Wash (Espanol PDF)
PAST MEETINGS: PRESENTATIONS AND LINKS
- Public Scoping Meeting - May 31, 2023
Any questions and comments about this project may be directed to Kristina Mohos using either of the below listed methods:
- Email: kmohos@genterra.com
- Phone: (949) 753-8766, Monday - Friday 9:00 a.m. to 5:00 p.m.
- Mail: Stockton Wash FRS Rehabilitation Project
c/o GENTERRA Consultants, Inc. - Kristina Mohos
15375 Barranca Parkway, Building L
Irvine, California 92618 - Website: Questions/Comments Form
Contact Information:
For further project information please contact:
- Kristina Mohos – GENTERRA Consultants, Inc.
15375 Barranca Parkway, Bldg. L
Irvine, CA 92618
Phone: (949) 753-8766
Email: kmohos@genterra.com - Punya Khanal – NRCS
230 N. 1st Avenue, #509
Phoenix, AZ 85003
Phone: (602) 280-8839
Email: punya.khanal@usda.gov - Michael Bryce – Graham County (Local Sponsor)
921 Thatcher Blvd
Safford, AZ 85546
Phone: (928) 428-0410
Email: Michael Bryce