Data center siting snapshot: Madison County, Mississippi

Line miles are measured from the archived HIFLD Transmission Lines layer inside the Census county boundary. Mapped lines are not available capacity.

What the public record shows

The archived HIFLD map displays approximately 128.4 miles of 230 kV-and-above transmission line within Madison County, Mississippi, consisting of 44.6 miles at 500 kV or more and 83.8 miles at 230 kV ^[1]. An additional 31.7 miles of 115–161 kV line are mapped in the area ^[2]. Entergy Mississippi is the owner of record with the most mapped 115 kV+ line miles ^[3]. Two named line endpoints touching 230 kV+ lines are located inside the county ^[4]. Retail electric utilities with mapped service territories covering part of the county include Entergy Mississippi and Yazoo Valley Electric Power Association ^[5].

As of 2026-11-09, records hold no county- or city-level data center moratorium or ordinance for Madison County ^[6]. At the state level, HB1393 (2026) was enacted on 2026-04-08, creating the Mississippi Energy Infrastructure Fund where data centers are included in the definition of a project ^[7]. SB3410 (2026) was also enacted on 2026-04-08, authorizing Brandon and the West Rankin Utility Authority to enter agreements with data center developers for water and wastewater infrastructure ^[8]. Several other bills failed, including HB4010 (2026) ^[9], HB4045 (2026) ^[10], HB1239 (2025) ^[11], and SB3168 (2025) ^[12].

Drafted by our local model from the numbered facts below, then checked sentence by sentence by a second model and a rules-based check.

Data center rules on record

Rule records come from The MW Desk legislation tracker, which includes rows from the Moratorium Nation dataset by Michael J. Bommarito (CC BY 4.0). Statuses change; confirm with the jurisdiction's own record.

Utilities on record

Entergy Mississippi, Yazoo Valley Electric Power Association. (HIFLD/EIA-861 territory polygons; approximate and often overlapping.)

Market context on The MW Desk: Memphis / North Mississippi.

Sources

1. [1] The archived HIFLD map shows about 128.4 miles of 230 kV-and-above transmission line inside Madison County, MS: 44.6 miles at 500 kV or more, 0.0 miles at 345 kV and 83.8 miles at 230 kV. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
2. [2] The same map shows about 31.7 miles of 115–161 kV line in the county. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
3. [3] Owners of record with the most mapped 115 kV+ line miles in the county: Entergy Mississippi. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
4. [4] 2 named line endpoints touching 230 kV+ lines (usually substations or switchyards) are mapped inside the county. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
5. [5] Retail electric utilities whose mapped service territory covers part of the county include: Entergy Mississippi, Yazoo Valley Electric Power Association. Territory boundaries are approximate. Source: HIFLD Electric Retail Service Territories (EIA-861 based; archived by SeerAI, CC BY 4.0)
6. [6] Our records hold no county- or city-level data center moratorium or ordinance for Madison County as of 2026-11-09. Source: The MW Desk legislation tracker
7. [7] Mississippi state/utility level, Mississippi: HB1393 (2026) (Creates the Mississippi Energy Infrastructure Fund. The definition of "project" includes data centers, making data-center-serving energy infrastructure potentially eligible for grants, loans, or other assistance through MDA, while excluding electric utilities as direct recipients). Status: enacted, dated 2026-04-08. Source: Mississippi Legislature - House Bill 1393 (2026) Status History
8. [8] Mississippi state/utility level, Mississippi: SB3410 (2026) (Authorizes Brandon and the West Rankin Utility Authority to enter agreements with data center or related technology facility developers/operators for water and wastewater infrastructure, reclaimed water delivery, wastewater treatment, capacity guarantees, assignment rights, rates, and terms up to 30 years with renewal options). Status: enacted, dated 2026-04-08. Source: Mississippi Legislature - Senate Bill 3410 (2026) Status History
9. [9] Mississippi state/utility level, Mississippi: HB4010 (2026) (Would revise the MFLEX framework and include a certified "new data center enterprise" or expansion as a qualifying enterprise category). Status: failed, dated 2026-02-25. Source: Mississippi Legislature - House Bill 4010 (2026) Status History
10. [10] Mississippi state/utility level, Mississippi: HB4045 (2026) (Would end certain income tax exemptions for income from qualifying data center projects after calendar year 2026 and create the Mississippi Strategic Development Fund funded partly through fee-in-lieu payments for projects over $2 billion). Status: failed, dated 2026-02-25. Source: Mississippi Legislature - House Bill 4045 (2026) Status History
11. [11] Mississippi state/utility level, Mississippi: HB1239 (2025) (Would revise data center enterprise definitions and state tax exemption terms in Sections 57-113-21, 57-113-23, and 57-113-25). Status: failed, dated 2025-03-29. Source: Mississippi Legislature - House Bill 1239 (2025) Status History
12. [12] Mississippi state/utility level, Mississippi: SB3168 (2025) (Would revise data center exemption definitions and create up to two additional 10-year exemption extensions for qualifying data center additions or expansions). Status: failed, dated 2025-03-18. Source: Mississippi Legislature - Senate Bill 3168 (2025) Status History