# N05_E18 Great Lakes pilot: 1673–2026 hydrologic and Indigenous-history crosswalk **Run date:** 2026-08-08 CDT (retrieved 2026-08-09 UTC) **Sector:** `N05_E18` **Canonical geometry:** 24 latitude bands × 24 longitude bands = 576 sectors; the fixed cell is 37.5°–45.0°N and 75°–90°W. This note does not redefine the cell. **Pilot position:** Great Lakes nine-sector octagon centered on the working Merrillville, Indiana anchor. **Status:** bounded research result; no score and no `provisional_quadrant` ## Scope and selection rationale The prior N05_E18 notes covered modern and historical water-quality, transport, utility, energy, population, and environmental-regulation paths, but the historical search envelope still lacked a page-verified pre-industrial/early-colonial source and a reproducible modern hydrologic crosswalk around the working anchor. This run therefore searched both sides inward without duplicating the completed WQP/USGS anomaly work: 1. **Historical end:** inspect the 1882 Internet Archive scan *Counties of Porter and Lake, Indiana: Historical and Biographical* for dated waterway, Indigenous, trade, portage, and early road observations. 2. **Modern end:** query the current USGS Network Linked Data Index (NLDI) at the Merrillville anchor for the machine-readable flowline, hydrolocation, basin, and linked WQP/NWIS site context. The source footprints are not equivalent. The archival item is a county-level retrospective history; the NLDI results describe a point, a local reach, a derived basin polygon, and linked monitoring sites. None is a cell-wide measurement. ## Search envelope | Field | Value | |---|---| | Sector anchor | Merrillville, Indiana: 41.4828°N, −87.3327°W | | Historical place terms | Porter County; Lake County; Calumet; Kankakee; Bailly Town; Fort Dearborn; Pottawatomie/Potawatomi; St. Joseph; Chicago | | Historical target variables | water profile; infrastructure/connectivity; institutional history; Indigenous presence and displacement context | | Modern target variables | hydrologic reach; basin relation; linked monitoring-site network | | Historical period | 1500–1800 and 1800–1950 bands, with source-specific dates 1673–1831 and publication date 1882 | | Modern period | 2000–present API retrieval, with current endpoint metadata | ## Raw observations ### A. Internet Archive item metadata The Internet Archive catalog identifies the source as *Counties of Porter and Lake, Indiana: Historical and Biographical*, created by Weston Arthur Goodspeed and Charles Blanchard, published in Chicago by F. A. Battey in 1882. The item has 771 pages and is in the Cornell University Library / Americana collections. The OCR was used as a locator and the cited pages were checked against page images. ```text sector_id: N05_E18 period_id: 1500-1800; 1800-1950 variable: historical_institutional_profile value_type: source_metadata geographic_scope: Porter County and Lake County historical narrative; county boundary is not the fixed cell source_tier: C, with institutional-library scan metadata source_identifier: cu31924104606235 publication_date: 1882 confidence: high for item metadata; medium for historical claims pending independent corroboration ``` ### B. Waterway and landscape observations, printed pp. 12–13 The source describes Lake Michigan along the northern shore, the Kankakee River to the south, several inland lakes, and the Calumet River flowing westward through the northern part of Porter County. It also describes a watershed divide near the center of Porter County. These are direct observations of what the 1882 author presents as local geography, not a modern hydrologic measurement and not a claim that the 1882 boundary matches `N05_E18`. ```text sector_id: N05_E18 period_id: 1800-1950 (source published 1882; described geography is partly undated) variable: water_profile subvariable: named_rivers_lakes_and_watershed_context value: Calumet River westward through northern Porter County; Kankakee River along the southern part; Lake Michigan to the north; a watershed line described near the county center value_type: qualitative_observation geographic_scope: Porter County, with named features extending beyond it comparability: related_not_equivalent source: Internet Archive item cu31924104606235, printed pp. 12–13, scan leaves n15–n16 extraction_method: OCR locator checked against scan images confidence: medium missingness: geographic_match_uncertain; period_match_uncertain ``` ### C. Early colonial movement, trade, and Indigenous presence, printed pp. 14–16 The historical narrative reports that French missionaries and explorers traveled through the region in the seventeenth century; it places Marquette’s 1673 route through the Kankakee and a portage to the St. Joseph, and describes 1712 French–Indigenous military cooperation, later British and Spanish claims, and Pottawatomy participation in the 1763 capture of the St. Joseph post during the Pontiac uprising. The source uses broad and dated political language but does not provide a population count, treaty text, Indigenous-authored account, or systematic evidence of the full cell’s political geography. The same section reports a 1803 passage by Whistler’s troops toward Fort Dearborn, a 1804 completion date for the fort, travel trails that became regular roads, native trapping and hunting around the Calumet and Kankakee, corn brought to the fort, and canoe and pack-pony transport. On printed p. 16 it reports the 1812 Fort Dearborn conflict, the fort’s rebuilding in 1816, Joseph Bailly’s 1822 settlement and trade with Native people, and a road cleared from Detroit to Fort Dearborn in 1831. ```text sector_id: N05_E18 period_id: 1500-1800; 1800-1950 variable: historical_institutional_profile subvariables: Indigenous_presence; trade; portage; military_and_colonial_control; road_connectivity observations: - 1673: Kankakee route and portage toward the St. Joseph reported - 1712: local Native people reported assisting the French against the Fox Indians - 1759–1783: French, British, Spanish, and United States claims described in sequence - 1763: Pottawatomies reported participating in the capture of the St. Joseph post - 1803–1804: Fort Dearborn route and completion described - 1816: Fort Dearborn reported rebuilt and garrisoned - 1822: Bailly Town described as a trade and gathering center with Native people - 1831: Detroit–Fort Dearborn road and mail route reported value_type: qualitative_observation geographic_scope: Porter County and regional routes connecting Lake Michigan, Kankakee, St. Joseph, Detroit, and Chicago comparability: related_not_equivalent source: Internet Archive item cu31924104606235, printed pp. 14–16, scan leaves n17–n19 extraction_method: OCR locator checked against scan images confidence: medium for the dated narrative; lower for uncorroborated political interpretation missingness: geographic_match_uncertain; source_bias_present ``` ### D. Bailly Town and source-bias observation, printed pp. 20–21 The source describes Bailly Town as a rendezvous for Native gatherings, trade, and religious activity rather than a settlement with a large resident population. It also states that the location lost importance after Native people left for western reservations. This is useful evidence that the author perceived the place as a trade and gathering node, but the latter statement is a settler-era retrospective and is not treated as a complete account of removal, treaty history, continuity, or Indigenous agency. ```text sector_id: N05_E18 period_id: 1800-1950 variable: historical_institutional_profile subvariable: settlement_and_trade_node value: Bailly Town described as a rendezvous for Native gatherings, trade, and religious worship; source states its importance declined after Native departure to western reservations value_type: qualitative_observation_with_source_bias geographic_scope: Bailly Town / Westchester Township area, not the full cell comparability: qualitative_only source: Internet Archive item cu31924104606235, printed pp. 20–21, scan leaves n23–n24 extraction_method: OCR locator checked against scan images confidence: medium for the description of the place; low for using it as a complete displacement history missingness: geographic_match_uncertain; source_bias_present; historical_measure_not_available ``` ### E. USGS NLDI point-to-network result The USGS NLDI `comid/position` endpoint returned a GeoJSON feature for the Merrillville anchor. It assigns the point to NHDPlus COMID `3399712`. The response geometry is a local flowline, and its properties include the navigation URL for that COMID. The NLDI `hydrolocation` endpoint returned a snapped point at approximately **41.4824398°N, −87.3339374°W**, with reachcode `04040001000480`, COMID `3399712`, and measure `10.873528411319496`. The snapped point is near the supplied anchor; it is not a second observation of the anchor’s exact coordinates and is not a sector centroid. ```text sector_id: N05_E18 period_id: 2000-present variable: infrastructure_connectivity / water_profile subvariable: hydrologic_network_location input_point: 41.4828, -87.3327 (WGS84) comid: 3399712 reachcode: 04040001000480 snapped_point: 41.4824398, -87.3339374 (WGS84) measure: 10.873528411319496 value_type: machine_readable_network_crosswalk geographic_scope: point and local NHDPlus reach comparability: related_not_equivalent source_tier: A confidence: high for the returned API fields; medium for interpreting the reach as representative of the cell missingness: geographic_match_uncertain ``` ### F. USGS NLDI basin and linked-site results The NLDI basin endpoint returned one GeoJSON polygon for COMID `3399712`. The result is a hydrologic network crosswalk, not a political, ecological, or fixed-grid boundary. The same COMID’s navigation queries returned linked WQP and NWIS locations upstream and downstream. Examples include downstream WQP locations `USGS-413303087142701`, `INSTOR_WQX-15694`, `USGS-412910087201101`, and `USGS-412945087200701`, and downstream NWIS locations including `USGS-04092990`, `USGS-04092975`, `USGS-04093000`, and `USGS-04092977`. Upstream WQP results included `INSTOR_WQX-17399`, `INSTOR_WQX-8390`, and `USGS-412857087201001`. These are linked monitoring locations returned by the network index. Their presence in the response does not establish that each has observations for the target analyte or period; the NLDI response is a site-discovery result, not an analyte-result query. ```text sector_id: N05_E18 period_id: 2000-present variable: water_profile subvariable: linked_monitoring_network value: one COMID basin polygon and multiple upstream/downstream WQP/NWIS linked locations returned value_type: machine_readable_discovery_observation geographic_scope: NLDI COMID 3399712 and network-linked sites within the requested 25 km navigation distance comparability: related_not_equivalent source_tier: A confidence: high for endpoint response; low-to-medium for sector-wide inference missingness: analyte_values_not_requested; geographic_match_uncertain; period_match_uncertain ``` ## Source interpretation The two evidence ends converge on a narrower and defensible claim: `N05_E18` contains a historically documented water-and-transport corridor whose modern working anchor can be placed on a named USGS/NHDPlus flowline and connected to a discoverable network of WQP/NWIS sites. The historical account supplies dated movement, trade, portage, road, and institutional anchors; the NLDI supplies a reproducible modern geography for selecting and ordering subsequent water observations. The evidence does **not** show that the historical route, the modern flowline, and the fixed 24 × 24 cell are the same object. It also does not establish that the historical narrative’s broad terms describe all Indigenous communities, all political relationships, or the whole Great Lakes pilot. The 1882 account should be treated as a local settler-era source requiring Indigenous-authored, treaty, archaeological, and primary administrative corroboration. ## Derived crosswalks (not scores) ### D1 — fixed-cell relation The supplied Merrillville anchor lies inside the existing cell bounds in the sector record. The NLDI snap and basin are local hydrologic objects nested within a much larger fixed cell. No area-weighted share, basin-area percentage, population value, or water-quality average is derived here. ### D2 — historical-to-modern variable crosswalk | Historical evidence | Modern NLDI evidence | Status | |---|---|---| | Calumet/Kankakee/Lake Michigan route and watershed descriptions | COMID/reachcode and basin around the working anchor | Related but not equivalent | | Canoe, pack-pony, road, and mail movement | Network-linked WQP/NWIS site discovery | Related but not equivalent | | Bailly Town as a trade/gathering node | Modern monitoring locations | Qualitative only; different institutions and purposes | | Historical Indigenous presence and colonial control narrative | Modern hydrologic geography | Not comparable as a direct measure | ### D3 — research-search improvement The NLDI result provides a reproducible next-search envelope: query the returned linked sites and the local reach/basin separately, preserving site identifiers, coordinates, analytes, dates, units, qualifiers, and portal missingness. This improves source selection but does not itself add a derived constraint or adaptive-capacity value. ## Model classification ```text provisional_quadrant: unresolved constraint_score: not derived comprehension_score: not derived formula_version: none applied reason: historical and modern evidence have different footprints and measures; the pilot lacks comparable raw tables across the nine sectors and the source-bounded observations do not justify a classification ``` ## Confidence and missingness ### Confidence dimensions - **Source authority:** high for NLDI endpoint fields and Internet Archive catalog metadata; medium for the 1882 historical narrative as a secondary local compilation. - **Geographic fit:** high for the anchor point and local NLDI reach; low-to-medium for extending either the county history or local reach to the full cell. - **Temporal fit:** high for the source publication date and explicitly dated historical events; the described geography is partly undated, and the modern endpoint is a current retrieval rather than a historical series. - **Extraction quality:** high for page-image checks on the cited archival leaves and machine-readable JSON retrieval. - **Independent corroboration:** not established here for the historical Indigenous and colonial sequence; do not upgrade those claims based on this item alone. - **Comparability:** low for direct historical-to-modern measurement; the crosswalk is relational and qualitative. ### Missingness codes - `geographic_match_uncertain`: county narrative, local place, basin, reach, linked site, and fixed cell are different spatial objects. - `period_match_uncertain`: the 1882 author’s undated landscape descriptions do not define a historical time series; NLDI is current network metadata. - `historical_measure_not_available`: no population, flow, area, trade volume, or Indigenous demographic measure was extracted from this source. - `source_bias_present`: the 1882 narrative uses settler-era categories and retrospective framing, especially for Indigenous history and removal. - `analyte_values_not_requested`: linked WQP/NWIS sites were discovered but their measurements were not silently inferred. - `conflicting_sources`: not assigned from this run; the previously documented 674 mg/L WQP anomaly remains a separate unresolved record. ## Falsification and alternative explanations The corridor interpretation could be weakened if primary records show that the cited routes were marginal, mislocated, or unrelated to the working anchor; if hydrologic connectivity did not support the historical travel paths; or if political control, land policy, capital, military power, or market access explains later infrastructure independently of water geography. The 1882 account may also compress distinct Indigenous nations and political periods into a settler-centered narrative. Future work should actively seek evidence that contradicts or qualifies the local corridor story rather than treating the source as confirmation. ## Unresolved gaps and next search path 1. Retrieve Indigenous-authored, treaty, land-cession, agency, archaeological, and primary French/British/United States records for the Potawatomi, Miami, Illinois, and related Great Lakes histories; do not use this 1882 retrospective as a substitute. 2. Query the NLDI-returned WQP/NWIS identifiers for analyte-level results and preserve dates, units, qualifiers, detection limits, methods, and provider/processing lineage. 3. Retrieve the NLDI basin geometry in a reproducible local artifact or script and document any future area/overlap calculation against the fixed cell; do not present the basin as the cell. 4. Locate primary evidence for the 1673, 1712, 1763, 1803–04, 1816, 1822, and 1831 anchors, with page/item provenance and explicit boundary crosswalks. 5. Continue the nine-sector Great Lakes pilot before global expansion; compare the same historical and modern variables across neighboring sectors. 6. Keep the N05_E18 quadrant unresolved until raw observations, missingness, formula version, alternatives, and matched-sector checks are complete. ## Provenance register 1. **Goodspeed, Weston Arthur, and Charles Blanchard.** *Counties of Porter and Lake, Indiana: Historical and Biographical*. Chicago: F. A. Battey, 1882. Internet Archive identifier `cu31924104606235`; catalog metadata, OCR, and page images retrieved 2026-08-08 CDT. Relevant printed pages: 12–16 and 20–21; scan leaves `n15`–`n19` and `n23`–`n24`. Item: . Page examples: , , , . 2. **U.S. Geological Survey.** Network Linked Data Index (NLDI) documentation and API, retrieved 2026-08-08 CDT. Documentation overview: . Point-to-network query: . Hydrolocation query: . Basin query: . Downstream WQP discovery: . Upstream WQP discovery: . Downstream NWIS discovery: . 3. **Project cross-references.** Canonical sector record: `ghojualamanchu/sectors/N05_E18_MERRILLVILLE.json`; active procedure: `08-research-sop.md`; Great Lakes scope: `05-great-lakes-test-sector.md`. ## Record limits This is a bounded N05_E18 research result. It adds page-verified 1673–1831 historical waterway, trade, transport, Indigenous-presence, and colonial-control observations from an 1882 county history, plus a current machine-readable USGS NLDI reach, basin, and linked-monitoring-site crosswalk at the working anchor. It does not establish a cell-wide hydrologic or historical measure, a demographic or displacement estimate, a causal claim, a derived score, or a `provisional_quadrant`. No secrets or private data are included.