Know your data sources.

Alaska Division of Geological & Geophysical Surveys — state geological survey. Mineral occurrences, geologic-map publication index, mining districts, volcanoes, radon observations. - searchMineralOccurrences ⭐ ~335 — DDS-18 MIL1, filter commodity / group / deposit type / status - searchGeologicMaps ⭐ ~4.16K USGS+DGGS publication index, filter agency / scale / keyword - searchMineralDistricts ⭐ 75 polygons across 14 regions - searchVolcanoes (~53 AVO inventory), getServiceInfo §0 spec drift: geology/statemap_projects + geophysics/Geophysical_Surveys services 500 ("No Layer or Table"). DROPPED. Volcanoes service rejects outFields=* with gateway error — handler enumerates explicit fields. Native CRS varies; outSR=4326 on every call.

Alaska DNR state trust lands + mineral permits/leases + state mining claims + land-status overlays — Land Records System via ArcGIS REST. - searchOilGasLeases ⭐ ~1.7K active O&G + offshore leases (1.95K MineralPermitOrLease) - searchOilGasLeaseSaleTracts ⭐ ~6.3K active sale-tract polygons - searchMiningClaims ⭐ active 38.4K / pending 191 / closed 79.5K - searchLandStatus 4 curated layers: lease 5.2K / mineralOrder 4.5K / miningClaims 120K / stateLand 27K - getLeaseById, listLayers, getServiceInfo §0 spec drift: dog.dnr.alaska.gov returns HTTP 500 on every query — public surface is arcgis.dnr.alaska.gov. AK has NO borough column on these layers — use bbox/near.

Kentucky EEC mining permits, KPDES wastewater facilities, and KNP-managed public lands via kygisserver.ky.gov. - searchPermittedMines ⭐ ~22.5K SMCRA mine permits (PER_TYPE / ACT_INAC / MINE_STATU) - searchPublicLands ⭐ heritage (298) | naturePreserve (31) | naturalArea (7) | stateForest (56) | all - searchWastewaterFacilities ⭐ layer: wwtp (251) | package (461) | outfall (681) - getServiceInfo §0: kyraster.ky.gov raster-only DROPPED. EEC eSearch HTML — REJECTED per §0a. kygisserver flaky; handler retries on 502/503/504. All services in WGS84WM_Services folder (EPSG:3857). State Forests targets layer 1 (layer 0 is StoryMap labels). Permitted Mine PermitNo can be a single space.

Pennsylvania DEP environmental — water, mining, hazardous waste, air. Same agency as pa-dep-oilgas, separate layers. - search303dImpairedStreams (~95K) ⭐ 303(d)-equivalent (impaired only). Filter use/cause/HUC - searchActMine ⭐ Anthracite + Bituminous + Industrial Mineral surface mine permits (~42K) - searchHazardousWasteSites (~16.9K Land Recycling Soil Media), searchAirEmissionSources (~61.3K), getServiceInfo upstream quirks: 303(d) layer 158 contains ONLY impaired streams (BLN_ATTAINED=N). Mining + Hazardous + Air layers have NO COUNTY column — silently dropped, use bbox/near or company/facility name. PERMIT_TYP freeform with 90+ values + typos. SITE_STATUS: ACTIVE / INACTIVE / ABANDONED / RECLAMATION COMPLETED / 'Unavaialble' [sic typo]. Air layer has only one PRIMARY_FACILITY_TYPE.

USGS MRDS + USMIN — global mineral deposits + US mine-feature points (no auth). Upstream (MapServer WFS 2.0.0): - /services/wfs/mrds — ms:mrds (~304K worldwide deposits) - /services/wfs/usmin — ms:points + ms:polygons (US only) Rich per-record JSON: /mrds/json/{dep_id} returns 26+ subtables (commodities, materials, ages, ore body, production, references, rocks). Filters: commodity (CU/AU/AG/FE/LI/U/REE/PGE…), country (FIPS), US state, dev_stat (Past Producer/Producer/Occurrence/Prospect/Plant/Raw Prospect), bbox. §0 quirks: CQL_FILTER silently ignored by MapServer — handler emits OGC FILTER= XML (fes:Filter). fips_code stored with literal "f" prefix (fCI / f06065). code_list space-separated with leading space.

Virginia Department of Energy (ex-DMME) — coalbed methane / oil & gas wells, 54.6K SWVA drilling grids, and statewide mineral mining permits. - searchOilGasWells ⭐ active (8.6K) | permittedUndrilled (208) | plugged (1.97K) via wellLayer - searchHorizontalGrids ⭐ 54.6K SWVA 20-acre drilling grid polygons - searchMineralMines ⭐ active (450) | released (1.78K). Filter mineralType (OP/QU/UG) - getWellByFiNo (cross-layer lookup), getServiceInfo §0 caught: Legacy dmme.virginia.gov DEAD — public surface is energy.virginia.gov. Geothermal/8 (NGDS, 1.3K) duplicate of DGO_wells — DROPPED. 73% CBM (Coalbed/Pipeline + Coal Bed). Counties UPPERCASE (BUCHANAN/DICKENSON/WISE 88%). Native CRS EPSG:6591; outSR=4326 reprojects.

WVDEP consolidated. Marcellus heart — EQT, Antero, Range, Southwestern. 11 services in one enterprise folder, 9 layers via 8 methods. - searchWells (~153K) ⭐ county (→FIPS), operator, status, wellType, formation, marcellus/horizontal flags - searchPermits ⭐ orderBy issuedate desc; permitType, yearFrom/To - searchAirEmissionSources (~2.6K), searchAbandonedMineLands (~10K), searchRemediationSites (VRP+SEMS), searchMiningReclamation (~11K), searchDamSafety (~395), searchWatershedAssessment (~34K 303d), getServiceInfo upstream quirks: county on wells = FIPS suffix (Wetzel='103'). marcellus 'y'/'n'/'u' string. Mining columns are type/per_status. SEMS columns 10-char truncated. AML status bracketed variants. Air/AML/VRP/Mining/Dam/Watershed have NO county column — bbox/near only.

Wyoming WDEQ — voluntary remediation + mining permits + solid waste + AML. - searchVoluntaryRemediation (~287 VRP/ICP/Brownfields) ⭐ - searchMinePermits (~265 LQD active) ⭐ - searchSolidWaste (~312 landfills/dumps), searchAMLPads (~284), getServiceInfo Spec drift: searchAirPermits + searchUSTSites + searchSpills DROPPED — no public Feature Services. WDEQ native servers (gis.deq.wyoming.gov, 020-arcgis02.wyores.local) are internal-only. Replacements: searchSolidWaste + searchMinePermits + searchAMLPads (drawn from WDEQ AGOL mirrors). upstream quirks: VRP INDUSTRY field has free-text variants (Energy/Energy-T&S/Energy-E&P/Refinery/Military/Commercial). Mine permits COUNTY is UPPERCASE. Solid Waste COUNTY is Title Case. Date columns are mix of strings and epoch-ms.