# N05_E18 Great Lakes pilot: 1834–1956 transport history and 2022 WQP anomaly verification **Run date:** 2026-08-07 (America/Chicago) **Sector:** `N05_E18` **Canonical geometry:** 24 latitude bands × 24 longitude bands = 576 sectors; this note uses the existing N05_E18 cell and does not redefine it. **Time bands:** 1800–1950 historical transition, with a 1956 historical anchor and a 2022 modern verification endpoint. **Status:** bounded research result; no sector score or quadrant assigned. ## Scope and selection This run continues the Great Lakes pilot and does not expand globally. It follows the prior note’s first next-search item: verify the anomalous Water Quality Portal row reporting dissolved oxygen of `674 mg/l` at `USGS-05536356` on 2022-08-30. It also follows the SOP’s historical-end procedure by adding a distinct Archive.org source-family search for transport, waterway, settlement, and industrial-transition anchors in the 1800–1950 band. The modern verification compares two different USGS delivery products for the same station and date: the WQP discrete result and the USGS continuous instantaneous-value series. The historical evidence comes from a local history scan, not from a cell-wide census or engineering inventory. None of these sources is treated as a direct measurement of the whole fixed sector. ## Research question Does the source record support retaining the 2022 dissolved-oxygen value as a usable environmental observation, and what bounded historical evidence connects the Calumet/Lake County corridor’s waterways, trails, railroads, and settlement to the later Gary industrial context? ## Raw observations ### A. WQP discrete result retained exactly as reported The previously downloaded WQP result CSV for `USGS-05536356` contains this row: | Field | Reported value | |---|---| | `ActivityIdentifier` | `nwisin.01.02200882` | | `ActivityStartDate` / time | `2022-08-30` / `07:40:00 EST` | | `ActivityTypeCode` | `Sample-Routine` | | `ActivityMediaName` | `Water` | | `HydrologicCondition` | `Stable, normal stage` | | `HydrologicEvent` | `Routine sample` | | `SampleCollectionMethod/MethodIdentifier` | `40` in the USGS parameter-code context `82398` | | `SampleCollectionMethod/MethodName` | `Multiple verticals` | | `SampleCollectionEquipmentName` | `US WBH-96 weighted-bottle sampler` | | `CharacteristicName` / fraction | `Oxygen` / `Dissolved` | | `USGSPCode` | `00300` | | `ResultMeasureValue` / unit | `674` / `mg/l` | | `ResultStatusIdentifier` | `Preliminary` | | `ResultValueTypeName` | `Actual` | | conducting organization and laboratory | U.S. Geological Survey-Water Resources Discipline | The row has no reported detection-condition text or qualifier. It remains a raw source observation. It is not silently corrected or replaced. **Source record:** Water Quality Portal result CSV, exact site `USGS-05536356`, `sampleMedia=Water`, retrieved 2026-08-06. **Source URL:** ### B. USGS continuous dissolved-oxygen values on the same date The USGS Water Services instantaneous-value response for site `05536356`, parameter code `00300`, and date `2022-08-30` returned a continuous series labeled **Dissolved oxygen, water, unfiltered, mg/L**. The response contained 78 quarter-hour values for that day. At the times bracketing the WQP sample, the reported values were: | Timestamp | Value | Qualifier | |---|---:|---| | `2022-08-30T07:30:00-04:00` | `6.8 mg/L` | `A` | | `2022-08-30T07:45:00-04:00` | `6.7 mg/L` | `A` | These values are about 100 times lower than the WQP row’s `674 mg/l`. The continuous series is not the same sampling design as the multiple-vertical discrete sample, so it does not prove which value is correct. It does establish a strong source-level inconsistency that must block unqualified use of `674` in a derived profile. **Source record:** USGS Water Services instantaneous values, site `05536356`, parameter `00300`, `2022-08-30`, JSON response retrieved 2026-08-07. **Source URL:** ### C. USGS monitoring-program context The USGS project page states that, in cooperation with the Indiana Department of Environmental Management and the U.S. Environmental Protection Agency, USGS began collecting continuous probe-based dissolved-oxygen and water-temperature measurements at 13 sites in the Grand Calumet River/Indiana Harbor Canal Area of Concern in spring 2021. The page lists `05536356` as a Grand Calumet River site with dissolved oxygen, temperature, discharge, gage height, specific conductance, pH, fluorescence, turbidity, and related monitoring fields. This explains why a continuous record exists for comparison, but it does not adjudicate the discrete row or establish a sector average. **Source:** U.S. Geological Survey, “Water Quality Monitoring and Algal Community Composition Analysis in Support of Eutrophication Beneficial Use Impairment Evaluation in the Grand Calumet River Area of Concern, Northwest Indiana.” **Source URL:** ### D. Historical waterway and transport observations, 1834–1908 The Internet Archive scan **From Lake Station To East Gary** was published in 1976 by the East Gary American Revolution Bicentennial Commission and the Lake County Public Library. Its history section preserves locally attributed observations and earlier source references. The following page-level passages were located in OCR and checked against rendered scan pages: 1. **PDF p. 5, “History of East Gary”:** the account describes a Pottawatomi village near what later became Lake Station/East Gary and refers to hunting and trapping in the surrounding region, including the vicinity of Liverpool and Glen Park. The passage is a later local-history compilation, not an independently verified population count. 2. **PDF pp. 5–6, “Liverpool”:** the account says that in the period of early settlement the Calumet and Deep Rivers were navigable for vessels of good size to Liverpool, and that a ferry was placed on the Calumet in 1834 with a hotel opened in 1835. It also states that the Calumet was later obstructed, especially after the draining of Cady Marsh caused sand to fill the channel. The source’s wording is preserved as a historical report; the hydrologic mechanism requires engineering or map corroboration. 3. **PDF pp. 6–7, “Lake Station”:** the account dates completion of the Michigan Central Railroad through northern Lake County to 1851, describes its relationship to an older Indian trail and two routes toward Chicago, and says George Earle recorded the Lake Station town site on April 1, 1852. It reports that Michigan Central built a depot containing freight, express, and telegraph offices, and that by 1854 the Joliet and Northern Indiana Railroad reached Joliet. 4. **PDF p. 7:** the source reports that Lake Shore, Michigan Central, and Joliet and Northern Indiana railroads made Old Lake Station “the most important shipping point in Lake County” for a period. This is a local historical characterization, not a tonnage series. 5. **PDF p. 7:** the source reports that U.S. Steel began platting and building Gary in 1906, and that East Gary was platted on May 5, 1908 as a suburb for clerical and professional workers connected to steel and other industries. It gives the East Gary area as 6,542.92 acres. This is a local-history account of settlement and industrial adjacency; the area figure and corporate chronology need independent cadastral or corporate corroboration before use in a score. **Source record:** East Gary American Revolution Bicentennial Commission, *From Lake Station To East Gary*, 1976, Internet Archive identifier `from-lake-station-to-east-gary-images`; OCR was used for location and the scan was checked on PDF pages 5–7. **Item URL:** **OCR derivative:** **PDF:** **Metadata:** ### E. Cross-check from Lake County historical papers The Internet Archive scan **Reports And Papers Of Lake County Indiana (1958–1966)** contains a historical overview that dates the Michigan Central’s crossing of Lake County to 1850, identifies daily mail service from Lake Station (later East Gary) to Crown Point, and describes the Joliet cutoff through Dyer. Its chronology differs by one year from the East Gary compilation’s 1851 date. The discrepancy is recorded rather than resolved by choosing one value. The same scan reports that Lake County had a population of less than 10,000 in the Civil War-era passage, but this county-level historical statement is not a value for N05_E18 and is not converted into a cell population estimate. **Source record:** Lake County Public Library, *Reports And Papers Of Lake County Indiana (1958–1966)*, 1966 collection volume, Internet Archive identifier `reportsandpapersoflakecountyindiana`; relevant scan text appears in the historical overview around PDF p. 7 and the Dyer/railroad passage in the later historical section. **Item URL:** **OCR derivative:** **PDF:** **Metadata:** ## Source interpretation - The WQP row is a valid record of what the portal transmitted: a preliminary dissolved-oxygen result of `674 mg/l` from a routine multiple-vertical sample. Its preliminary status and conflict with the same-day continuous series prevent treating it as a validated environmental condition. - The USGS continuous series provides a same-site, same-date comparison near the sample time: `6.8` and `6.7 mg/L`. Because the sampling designs differ, the comparison is a discrepancy check, not a substitution rule. - USGS parameter-code documentation and field-method literature identify multiple-vertical sampling as a cross-sectional collection method; that method context does not explain the magnitude discrepancy. A method record, laboratory/processing record, or corrected source row is still needed. - The historical sources support a bounded interpretation of the corridor as a changing water-and-transport interface: early waterways and ferry movement, then rail and telegraph integration, then industrial-city and suburban formation. They do not support a cell-wide production, population, or water-quality value. - The East Gary compilation dates the Michigan Central event to 1851; the Lake County historical overview says 1850. This is a period-anchor conflict, not evidence that one source should be silently discarded. ## Derived profile (not a quadrant) ### Derivation D1 — anomaly comparison - **Inputs:** one WQP discrete row at 07:40 EST (`674 mg/l`, preliminary) and two USGS continuous values at 07:30 and 07:45 EDT (`6.8` and `6.7 mg/L`, qualifier `A`). - **Operations:** preserve units, timestamps, status, method, and qualifiers; compare magnitude and temporal adjacency without averaging. - **Output:** a source inconsistency flag: `conflicting_sources` / `measurement_or_ingest_anomaly`. - **Missing-data behavior:** the WQP value is not converted to zero, omitted as if absent, or replaced by the continuous values. ### Derivation D2 — historical corridor sequence The following is a transparent ordering of reported anchors, not a numeric score: ```text 1834–1835: reported ferry and hotel at Liverpool on the Calumet 1850/1851: reported Michigan Central crossing of Lake County 1852: reported Lake Station town-site recording and depot development 1854: reported Joliet and Northern Indiana Railroad to Joliet 1906–1908: reported Gary steel-city development and East Gary suburban platting 1956: Gary Works industrial-scale account in the prior note 2022: modern point/continuous monitoring at Grand Calumet station ``` This sequence supports historical-period indexing and a future transport/institutional crosswalk. It does not establish causation, continuity of ownership, or sector-wide infrastructure density. ## Geography and variable crosswalk | Evidence | Source footprint | Relation to `N05_E18` | Comparability | |---|---|---|---| | WQP discrete and USGS continuous observations | One Grand Calumet monitoring point near Hammond | Point within the fixed cell’s broader Great Lakes/Calumet context; not cell-wide | Directly comparable only as a same-station discrepancy check; not comparable to historical narrative as a measurement | | Liverpool ferry and river account | Local place history, Calumet/Deep River corridor | Related local corridor; boundary not equivalent to the cell | Qualitative only for historical transport and waterway context | | Michigan Central, Joliet and Northern Indiana, Lake Station depot | Northern Lake County historical place/rail corridor | Crosses local administrative and transport footprints; not a cell aggregate | Related but not equivalent to modern connectivity metrics | | Gary Works / East Gary | Gary and nearby suburban/industrial places | Partial corridor overlap; not all of N05_E18 | Related but not equivalent to cell-wide industry, population, or energy values | ## Model classification ```yaml provisional_quadrant: unresolved classification_reason: > The run verifies a strong same-site discrepancy between a preliminary WQP dissolved-oxygen row and the adjacent USGS continuous series, while adding bounded historical transport and waterway anchors. The source conflict, partial geographic footprints, and unfrozen pilot formula block a quadrant. formula_version: not_assigned confidence: medium for the reported source records; low for sector-wide inference ``` `provisional_quadrant` is a model output, not an archival fact. This run assigns none. ## Confidence and missingness ### Confidence dimensions - **Source authority:** high for the USGS/WQP and USGS Water Services records as records of reported observations; medium for the local-history compilations. - **Geographic fit:** medium-low. The monitoring site is a point, and the historical sources cover local corridors, municipalities, and county-level narratives rather than the fixed cell. - **Temporal fit:** high for the dated 2022 comparison; medium for the 1834–1908 anchors; low for continuous reconstruction of 1800–1950. - **Measurement quality:** high for the transmitted timestamps, units, methods, statuses, and qualifiers; low for using the anomalous `674 mg/l` as a validated environmental value. - **Extraction quality:** high for machine-readable USGS fields; medium for OCR-assisted historical extraction because page images were needed to check wording. - **Independent corroboration:** medium for the existence of the same-site USGS continuous series; low-to-medium for the historical rail and waterway chronology because the two local compilations differ on the Michigan Central year and require primary engineering/corporate corroboration. - **Comparability:** medium for the modern same-station discrepancy check; low between historical narrative and modern water-quality measurements. - **Known bias:** local histories may favor civic continuity and retrospective development narratives; WQP and USGS coverage reflect monitoring design, preliminary-status workflows, and agency reporting systems. ### Missingness codes - `conflicting_sources`: WQP discrete `674 mg/l` versus adjacent USGS continuous values `6.8` and `6.7 mg/L`. - `source_exists_not_accessible`: the underlying processing or correction record that could explain the WQP magnitude was not located in this run. - `geographic_match_uncertain`: station, Liverpool, Lake Station/East Gary, Gary Works, Lake County, watershed, and fixed cell are distinct footprints. - `period_match_uncertain`: historical sources provide dated anchors and retrospective narratives, not continuous 1800–1950 series. - `historical_measure_not_available`: no cell-level historical dissolved-oxygen, rail tonnage, or industrial-employment series was assembled. - `not_searched`: no new population, energy, remediation, utility, or Indigenous-authored primary-source extraction was completed in this run. - `not_applicable`: composite score and quadrant remain unassigned. Archival silence and portal silence are not zeros. The `674 mg/l` row is retained as a source observation despite its conflict; no clean-condition or constraint score is inferred from either value. ## Falsification and alternative explanations The working thesis would be weakened if: - the rail and waterway sequence does not survive comparison with primary railroad, cadastral, hydrologic, or corporate records; - the historical localities cannot be mapped to the fixed cell without a principled corridor crosswalk; - the apparent modern discrepancy is shown to arise from a unit, transcription, time-zone, or method mismatch that invalidates the proposed monitoring comparison; - neighboring Great Lakes sectors with comparable water and rail access show trajectories not explained by the proposed corridor mechanism; - documentation density is mistaken for adaptive capacity, especially where Indigenous, labor, and local environmental records remain missing. ## Next search path 1. Query the USGS/WQP method, activity, and result-correction metadata for `nwisin.01.02200882`; retain the original row and record any correction or status change. 2. Retrieve the WQP and USGS continuous profiles for the other Grand Calumet and Indiana Harbor Canal stations listed by the USGS project, comparing only same-station, same-day records with method and unit controls. 3. Locate primary or institutional railroad and engineering records for the 1850/1851 Michigan Central date, the Joliet cutoff, Lake Station depot, and Calumet/Cady Marsh channel changes. 4. Add a structured historical population/employment/industrial series for the appropriate Lake County, place, and census boundaries without treating any one boundary as the fixed cell. 5. Continue Archive.org searches for 1800–1950 port, canal, drainage, railroad, steel, and Indigenous-authored or primary Great Lakes sources. 6. Keep `provisional_quadrant: unresolved` until raw variables, crosswalks, missingness, alternative explanations, and the pilot formula satisfy the SOP. ## Provenance register 1. U.S. EPA, USGS, and National Water Quality Monitoring Council, **Water Quality Portal result CSV**, exact site `USGS-05536356`, `sampleMedia=Water`, retrieved 2026-08-06. The prior run’s returned profile contained 849 water rows; this run verifies the exact anomalous row’s activity, method, unit, status, and time fields. - Results: - Station: - Portal documentation: 2. U.S. Geological Survey, **Water Services instantaneous values**, site `05536356`, parameter code `00300`, date `2022-08-30`, JSON response retrieved 2026-08-07. - 3. U.S. Geological Survey, **Grand Calumet River Area of Concern water-quality monitoring project**, retrieved 2026-08-07. - 4. East Gary American Revolution Bicentennial Commission, **From Lake Station To East Gary**, 1976, Internet Archive identifier `from-lake-station-to-east-gary-images`; OCR locator and PDF scan pages 5–7 checked. - Item: - OCR: - PDF: - Metadata: 5. Lake County Public Library, **Reports And Papers Of Lake County Indiana (1958–1966)**, Internet Archive identifier `reportsandpapersoflakecountyindiana`; OCR and PDF checked for the Michigan Central, Lake Station, Dyer, and population passages. - Item: - OCR: - PDF: - Metadata: 6. Related project note: `2026-08-06-N05_E18-1956-gary-works-wqp-profile.md`, which first recorded the anomalous WQP row and the 1956 Gary Works anchor. ## Record limits This note is a bounded N05_E18 research result, not a completed sector audit. It establishes a reproducible source discrepancy and a historically bounded transport sequence, but no final dissolved-oxygen value, cell-wide water-quality estimate, infrastructure score, causal claim, or quadrant. The discrepancy and the 1850/1851 historical-date conflict remain explicit next-search targets.