{
  "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1",
  "concept": "ark:/99999/dp-american-rivers-dam-removal-database",
  "url": "https://datasetpapers.com/papers/dam-size-vs-upstream-miles-reconnected/",
  "title": "Do dam structural dimensions predict upstream river miles reconnected?",
  "source_dataset": {
    "title": "American Rivers Dam Removal Database",
    "doi": "10.6084/m9.figshare.5234068.v13",
    "license": "CC BY 4.0"
  },
  "verification": {
    "method": "re_execution",
    "status": "matched",
    "reproduced": true,
    "ran_at": "2026-07-13T14:07:37Z",
    "record": "verification.json"
  },
  "gate": {
    "passed": true,
    "version": "gate-0.1",
    "novelty_grade": "C",
    "failed": []
  },
  "claims": [
    {
      "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1/claim-1",
      "n": 1,
      "triple": {
        "subject": "Dam height (Dam_Height_ft) of removed dams",
        "predicate": "is not associated with",
        "object": "upstream river miles reconnected (Miles_Restored_US)"
      },
      "assertion_text": "Dam height shows no detectable monotonic association with upstream miles reconnected (Spearman rho = 0.047, raw p = 0.34, Holm-corrected p = 0.34, 95% bootstrap CI [-0.052, 0.145], n = 420); the confidence interval includes zero.",
      "novelty_grade": "C",
      "mode": "observational-correlational",
      "confidence": 0.85,
      "self_reported_status": "unverified",
      "independent_reexecution": "matched",
      "entities": [],
      "relations": [
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/fig-1"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/tbl-1"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/analysis"
        },
        {
          "predicate": "wasDerivedFrom",
          "target": "https://doi.org/10.6084/m9.figshare.5234068.v13"
        },
        {
          "predicate": "isPartOf",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1"
        }
      ]
    },
    {
      "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1/claim-2",
      "n": 2,
      "triple": {
        "subject": "Dam length (Dam_Length_ft) of removed dams",
        "predicate": "is weakly positively associated with",
        "object": "upstream river miles reconnected (Miles_Restored_US)"
      },
      "assertion_text": "Dam length is weakly positively associated with upstream miles reconnected (Spearman rho = 0.129, raw p = 0.0092, Holm-corrected p = 0.018, 95% bootstrap CI [0.032, 0.226], n = 404); the association survives Holm-Bonferroni correction across the two primary tests.",
      "novelty_grade": "C",
      "mode": "observational-correlational",
      "confidence": 0.75,
      "self_reported_status": "unverified",
      "independent_reexecution": "matched",
      "entities": [],
      "relations": [
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/fig-2"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/tbl-1"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/analysis"
        },
        {
          "predicate": "wasDerivedFrom",
          "target": "https://doi.org/10.6084/m9.figshare.5234068.v13"
        },
        {
          "predicate": "isPartOf",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1"
        }
      ]
    },
    {
      "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1/claim-3",
      "n": 3,
      "triple": {
        "subject": "The marginal dam-height association with upstream miles reconnected",
        "predicate": "is attributable to",
        "object": "collinearity between dam height and dam length"
      },
      "assertion_text": "In a rank-based partial correlation on the common subset (n = 400), the length-reconnection association holds controlling for height (partial rho = 0.121, p = 0.015), whereas the height-reconnection association vanishes controlling for length (partial rho = -0.028, p = 0.578).",
      "novelty_grade": "C",
      "mode": "observational-correlational",
      "confidence": 0.7,
      "self_reported_status": "unverified",
      "independent_reexecution": "matched",
      "entities": [],
      "relations": [
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/fig-3"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/tbl-2"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/analysis"
        },
        {
          "predicate": "wasDerivedFrom",
          "target": "https://doi.org/10.6084/m9.figshare.5234068.v13"
        },
        {
          "predicate": "isPartOf",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1"
        }
      ]
    },
    {
      "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1/claim-4",
      "n": 4,
      "triple": {
        "subject": "The dam-length association with upstream miles reconnected",
        "predicate": "is robust to",
        "object": "outlier winsorization of the outcome at its 99th percentile"
      },
      "assertion_text": "Winsorizing Miles_Restored_US at its 99th percentile (cap = 614.45 miles) leaves both primary coefficients essentially unchanged (length rho = 0.129, p = 0.0092; height rho = 0.047, p = 0.34), so neither result is driven by extreme reconnection values.",
      "novelty_grade": "C",
      "mode": "observational-correlational",
      "confidence": 0.8,
      "self_reported_status": "unverified",
      "independent_reexecution": "matched",
      "entities": [],
      "relations": [
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/fig-3"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/tbl-2"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/analysis"
        },
        {
          "predicate": "wasDerivedFrom",
          "target": "https://doi.org/10.6084/m9.figshare.5234068.v13"
        },
        {
          "predicate": "isPartOf",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1"
        }
      ]
    },
    {
      "id": "ark:/99999/dp-american-rivers-dam-removal-database.v1/claim-5",
      "n": 5,
      "triple": {
        "subject": "Dam structural size (height and length)",
        "predicate": "explains a negligible fraction of variance in",
        "object": "upstream river miles reconnected"
      },
      "assertion_text": "The strongest observed association (length, Spearman rho = 0.129) corresponds to under 2% of rank variance in upstream miles reconnected (rho-squared = 0.0167), indicating dam physical scale is a minor determinant of how much upstream river a removal reconnects; no causal claim is made.",
      "novelty_grade": "C",
      "mode": "observational-correlational",
      "confidence": 0.7,
      "self_reported_status": "unverified",
      "independent_reexecution": "matched",
      "entities": [],
      "relations": [
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/fig-3"
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        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/tbl-1"
        },
        {
          "predicate": "supportedByEvidence",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1/narrative"
        },
        {
          "predicate": "wasDerivedFrom",
          "target": "https://doi.org/10.6084/m9.figshare.5234068.v13"
        },
        {
          "predicate": "isPartOf",
          "target": "ark:/99999/dp-american-rivers-dam-removal-database.v1"
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      ]
    }
  ]
}