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        "code":"LD04",
        "slug":"ld04",
        "elevation":0.0,
        "horizontal_datum":"NAD83",
        "vertical_datum":"NGVD29",
        "state":"AR",
        "kind":"PROJECT",
        "nearest_city":"Pine Bluff",
        "public_name":"E. Sanders Lock & Dam 04",
        "location_code":2058150,
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            "CWMS Legacy Naming":"LD04",
            "USGS Station Number":"07263706",
            "NWS Handbook 5 ID":"LADA4",
            "NIDID":"AR00167",
            "NID Dam Name":"EMMETT SANDERS LOCK & DAM",
            "DCP Platform ID":"CE689FF6",
            "CWMS Standard Naming":"LD04"
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                "base_parameter":"Elev",
                "parameter":"Elev",
                "unit":"ft",
                "unit_long_name":"Feet",
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                "delta24h":null,
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                "label":"Outflow",
                "base_parameter":"Flow",
                "parameter":"Flow",
                "unit":"cfs",
                "unit_long_name":"Cubic feet per second",
                "latest_time":"2026-04-14T22:00:00Z",
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                "delta24h":null,
                "sort_order":7,
                "results":null
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            {
                "tsid":"LD04-Headwater.Stor-Res.Inst.1Hour.0.CCP-Comp",
                "label":"Flood Storage",
                "base_parameter":"Stor",
                "parameter":"Stor-Res",
                "unit":"ac-ft",
                "unit_long_name":"Acre-feet",
                "latest_time":"2026-04-14T22:00:00Z",
                "latest_value":70862.0,
                "delta24h":null,
                "sort_order":11,
                "results":null
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                "tsid":"LD04-Tailwater.Elev-Downstream.Inst.1Hour.0.Decodes-rev",
                "label":"Elevation Tailwater",
                "base_parameter":"Elev",
                "parameter":"Elev-Downstream",
                "unit":"ft",
                "unit_long_name":"Feet",
                "latest_time":"2026-04-14T22:00:00Z",
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                "tsid":"LD04.Precip-Cum.Inst.1Hour.0.Decodes-rev",
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                "base_parameter":"Precip",
                "parameter":"Precip-Cum",
                "unit":"in",
                "unit_long_name":"Inches",
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                "results":null
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                "base_parameter":"Flow",
                "parameter":"Flow-Res In",
                "unit":"cfs",
                "unit_long_name":"Cubic feet per second",
                "latest_time":"2026-04-14T22:00:00Z",
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                "unit":"ac-ft",
                "unit_long_name":"Acre-feet",
                "latest_time":"2026-04-14T22:00:00Z",
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        "name":"E. Sanders Lock & Dam 04",
        "hasResopsAverages":"false",
        "nidId":"AR00167",
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                "slug":"elev.bottom of operating",
                "label":"Bottom of Operating",
                "parameter":"Elev-Pool",
                "base_parameter":"Elev",
                "tsid":"LD04.Elev-Pool.Inst.0.Bottom of Operating",
                "latest_value":194,
                "units":"ft",
                "units_long_name":"Feet"
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                "slug":"elev.top of dam",
                "label":"Top of Dam",
                "parameter":"Elev-Pool",
                "base_parameter":"Elev",
                "tsid":"LD04.Elev-Pool.Inst.0.Top of Dam",
                "latest_value":197,
                "units":"ft",
                "units_long_name":"Feet"
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            {
                "slug":"elev.top of inactive",
                "label":"Top of Inactive",
                "parameter":"Elev-Pool",
                "base_parameter":"Elev",
                "tsid":"LD04.Elev-Pool.Inst.0.Top of Inactive",
                "latest_value":169,
                "units":"ft",
                "units_long_name":"Feet"
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                "slug":"elev.top of normal",
                "label":"Top of Normal",
                "parameter":"Elev-Pool",
                "base_parameter":"Elev",
                "tsid":"LD04.Elev-Pool.Inst.0.Top of Normal",
                "latest_value":196,
                "units":"ft",
                "units_long_name":"Feet"
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            {
                "slug":"elev.top of operating",
                "label":"Top of Operating",
                "parameter":"Elev-Pool",
                "base_parameter":"Elev",
                "tsid":"LD04.Elev-Pool.Inst.0.Top of Operating",
                "latest_value":196.3,
                "units":"ft",
                "units_long_name":"Feet"
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        "id":549762,
        "associatedStructuresCount":0,
        "conditionAssessDate":null,
        "conditionAssessDetail":null,
        "conditionAssessId":6,
        "damHeight":34,
        "damLength":18400,
        "distance":null,
        "drainageArea":158658,
        "eapId":1,
        "dsacAssignedDate":"2023-03-31T12:00:00.000Z",
        "eapMeetsGuidelinesId":1,
        "emergencyContactsUpdated":"2024-05-02T12:00:00.000Z",
        "eapLastRevDate":"2024-05-02T12:00:00.000Z",
        "enforcementAuthorityId":0,
        "federalId":"AR00167",
        "oldFederalId":"AR00167",
        "hazardId":3,
        "hydraulicHeight":32,
        "inspectionAuthorityId":0,
        "inspectionDate":"2022-04-19T12:00:00.000Z",
        "inspectionFrequency":5,
        "jurisdictionAuthorityId":0,
        "latitude":34.248735503,
        "lengthOfLocks":600,
        "secondaryLengthOfLocks":null,
        "longitude":-91.904100355,
        "maxDischarge":375000,
        "maxStorage":77000,
        "nidHeight":46,
        "nidStorage":77000,
        "normalStorage":70400,
        "numberOfLocks":1,
        "operationalStatusDate":"2023-03-31T12:00:00.000Z",
        "operationalStatusId":1,
        "originalDesignerName":null,
        "otherStructureId":null,
        "permittingAuthorityId":0,
        "politicalPartyId":null,
        "privateDamId":null,
        "projectDescription":"The U.S. Army Corps of Engineers (USACE) operates and maintains more than 700 dams across the United States. A dam is an earthen embankment and/or solid concrete structure that is built across a river, stream, or other waterway to temporarily hold back and store water that would otherwise flow downstream. More detail related to this specific dam will be added at a future time.",
        "riskCharSummary":"USACE completed a risk assessment for Emmett Sanders Lock and Dam in April 2022 that characterizes the risks associated with the project as low because there is no potential for life loss or significant economic damages in the unlikely event the lock and dam fail. \nThe dam significantly reduces the risk of flooding to surrounding communities. However, it does not eliminate the risk. The initial Screening Portfolio Risk Assessment (SPRA) identified overtopping erosion leading to loss of pool and instability of a dam pier due to a seismic event as the risk driving failure modes and recommended Sanders Lock and Dam be categorized a DSAC 4. The 2022 risk assessment identified backwards erosion piping of the left embankment and liquefaction of dam foundation to be the primary risk drivers. A loss of service risk driver, allision with a miter gate, was also identified. No other failure modes were believed to have sufficient risk to contribute to the project total risk. Overtopping of the left embankment identified as a risk driver during the SPRA was excluded as a risk driver due to the embankment core being constructed of erosion resistant materials and continued performance during frequent overtopping events.",
        "riskManagementMeasures":"Dam safety training of project operation and maintenance for personnel was conducted in July 2019. The Emergency Action Plan (EAP) is maintained and regularly updated. The EAP was last updated in March 2022. An orientation seminar and drill were conducted in April 2022. Participants included staff with the Little Rock District Emergency Management office, McClellan-Kerr Arkansas River Navigation System, and local Office of Emergency Management. Since the project is currently categorized as DSAC 4, an Interim Risk-Reduction Measures Plan (IRRMP) is not required. Routine dam safety activities and normal operations, maintenance, monitoring, and evaluation are considered appropriate.",
        "riverName":"ARKANSAS",
        "separateStructuresCount":0,
        "sourceAgency":"US Army Corps of Engineers",
        "spillwayTypeId":1,
        "spillwayWidth":1020,
        "stateFedId":"AR00167",
        "stateRegulatoryAgency":null,
        "stateRegulatedId":0,
        "structuralHeight":46,
        "submitDate":"2023-08-02T00:00:00.000Z",
        "surfaceArea":5680,
        "volume":96500,
        "widthOfLocks":110,
        "secondaryWidthOfLocks":null,
        "yearCompleted":1968,
        "congDist":"Congressional District 04, Arkansas",
        "city":"GILLETT",
        "county":"Jefferson",
        "aiannh":null,
        "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/",
        "coreTypeIds":"2",
        "damTypeIds":"11;9",
        "fedConstructionIds":"1",
        "fedDesignIds":"1",
        "fedFundingIds":"1",
        "fedInspectionIds":"1",
        "fedOperationIds":"1",
        "fedOtherIds":"1",
        "fedOwnerIds":"1",
        "fedRegulatoryIds":"1",
        "formerNames":"Lock & Dam 4",
        "foundationTypeIds":"3",
        "nonFederalDamOnFederalId":0,
        "designerNames":"CESWL",
        "otherNames":"Pool 4",
        "ownerNames":"USACE - Little Rock District",
        "ownerTypeIds":"3",
        "primaryDamTypeId":11,
        "primaryOwnerTypeId":3,
        "primaryPurposeId":3,
        "purposeIds":"3;5",
        "dsacId":4,
        "femaRegion":"6",
        "lastEapExcerDate":"2024-03-11T12:00:00.000Z",
        "dataUpdated":"2025-03-18T12:00:00.000Z",
        "usaceDistrict":"Little Rock District",
        "noConsequencesId":1,
        "secretaryAgricultureBuiltId":null,
        "nrcsWatershedAuthorizationId":null,
        "isAssociatedStructureId":"No",
        "fedRegulatedId":"Yes",
        "inundationNidAddedId":2,
        "damStatusId":2,
        "huc06":"111102",
        "doi_region":null,
        "doi_region_name":"Mississippi Basin",
        "doi_region_number":4
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