Los Alamos County / LANL Federal–County Hybrid Governance (NM)
Tracked preemption from the New Mexico overlay bundle.
Overview
← All state preemptionsNew Mexico overlay roll-upNew Mexico zoning wikiNew Mexico building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
1949-01-01
Sunset
—
Authority
federal
Scope
state:NM
Other New Mexico preemptions
WIPP (Carlsbad) Federal Radioactive Waste CorridorNMSA 3-21A — Manufactured Home Siting Non-DiscriminationMilitary AICUZ / Federal Installation Overlays (Kirtland AFB, Holloman AFB, WSMR, Cannon AFB)N.M. Const. Art. X § 6 — Constitutional Municipal Home Rule (Charter Cities)NMSA 3-21 — Municipal/County Zoning Enabling Act (Dillon's Rule Baseline)NMSA 3-21-2 / 3-21-6 — Extraterritorial Joint Zoning Authority (EZA/ELUC, SFEZO)Federal-Land Jurisdiction Carve-Out (BLM / USFS / NPS / State Trust Lands)Acequia / Community Ditch Overlay (NMSA Ch. 73)
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
city.fips_county_code == 35028Preempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
governing_zoning_authority | override | los_alamos_county_consolidated | Los Alamos is a consolidated city-county; ~36 sq mi of the county boundary lies within Los Alamos National Laboratory (DOE/NNSA) and is federal jurisdiction not subject to county zoning |
federal_use_carveout | override | nnsa_lanl_security_perimeter | LANL technical-area zoning is set by DOE/NNSA site-development plans, not the Los Alamos County zoning code; the county zoning code applies only to the non-LANL residential and commercial portions of the county (Los Alamos town site, White Rock) |
Citation
Authority source
Atomic Energy Act of 1954 (42 U.S.C. § 2011 et seq.); NMSA 4-45 (consolidated city-county); DOE/NNSA Site Office authority under 10 CFR Part 851
§ AEA + NMSA 4-45 + DOE Order 430.1B (Real Property Asset Management)
Research notes
Los Alamos is one of only two consolidated city-county governments in NM (the other being Santa Fe's looser city/county arrangement). The unique federal-county hybrid governance means a meaningful share of the county's territory is DOE/NNSA federal jurisdiction outside county zoning — modeling this explicitly prevents downstream consumers from misapplying county zoning fields to LANL technical-area parcels. Sandia National Labs (Kirtland AFB, Bernalillo County) has a similar but less geographically distinct overlay; included implicitly under the Kirtland AICUZ entry.