PERMIT RATIONALE FOR REISSUANCE
Agricultural Research Service, Alluvial Aquifer Recharge Project
Leflore County
Shellmound, Mississippi
Water NPDES No. MS0062448
November 2023

I.	FACILITY INFORMATION

Facility Name:  Agricultural Research Service, Alluvial Aquifer Recharge Project
Facility Address:  Wildwood Road 
Shellmound, MS  38930    
Stoneville, 
Permit No.:  MS0062448
SIC:  8734
Permit Writer:  Samar Patel
EPD Branch:  Water I Branch

II.	NATURE OF BUSINESS

Short term pilot scale project that involves extracting water from the aquifer near the bank of the Tallahatchie River through a closed conduit into two injections wells within the Mississippi Alluvial Aquifer to help recharge the water deficit. Periodic backwashing of the injections well screens will need to be done to ensure the screens do not get clogged.

III.	EFFLUENT AND RECEIVING STREAM DATA

Outfall 001 – The facility is discharging approximately 0.067 MGD once per week as needed into a drainage ditch, thence to Lake Henry. The receiving waters are in the Yazoo River Basin and are classified as Fish and Wildlife. Lake Henry is listed on the most recent State of Mississippi 303(d) list of evaluated or impaired waterbodies list for chlorides, organic enrichment, and low DO.  There is a TMDL for sediments and nutrients for Lake Henry.  This discharge complies with the TMDL.

IV.	SUMMARY OF LIMITATIONS

Parameter	Proposed Average Limitation	Proposed Maximum Limitation	Basis	
Flow	0.067 MGD	Report MGD	Design	
Iron	Report mg/l	1.0 mg/l	MSWQS	
TSS	30 mg/l	45 mg/l	Technical Judgement	
pH	6.0 S.U. (min)	9.0 S.U. (max)	MSWQS