{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -72.29036, 42.07352 ] }, "properties":{ "provider":"NAE", "code":"CBD", "slug":"cbd", "elevation":692.91, "horizontal_datum":"WGS84", "vertical_datum":"NGVD29", "state":"MA", "kind":"PROJECT", "nearest_city":"Springfield", "public_name":"Conant Brook Dam", "location_code":8035021, "nsid":null, "aliases":{ "NIDID":"MA00965", "CWMS Legacy Naming":"CBD", "CWMS Standard Naming":"CBD" }, "timeseries":[ { "tsid":"CBD.Stage-Pool.Inst.15Minutes.0.DCP-rev", "label":"Stage", "base_parameter":"Stage", "parameter":"Stage-Pool", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:30:00Z", "latest_value":0.85, "delta24h":null, "sort_order":4, "results":null }, { "tsid":"CBD.Flow-Inflow.Total.15Minutes.6Hours.DCP-rev", "label":"Inflow", "base_parameter":"Flow", "parameter":"Flow-Inflow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T21:30:00Z", "latest_value":8.6, "delta24h":null, "sort_order":6, "results":null }, { "tsid":"CBD.Stor.Inst.15Minutes.0.DCP-rev", "label":"Flood Storage", "base_parameter":"Stor", "parameter":"Stor", "unit":"ac-ft", "unit_long_name":"Acre-feet", "latest_time":"2026-08-25T21:30:00Z", "latest_value":1.7, "delta24h":null, "sort_order":11, "results":null }, { "tsid":"CBD.Flow.Ave.15Minutes.6Hours.DCP-rev", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T21:30:00Z", "latest_value":8.68, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"CBD.Stage-Pool.Inst.15Minutes.0.DCP-rev", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage-Pool", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:30:00Z", "latest_value":0.85, "delta24h":null, "sort_order":5, "results":null } ], "name":"Conant Brook Dam", "hasResopsAverages":"false", "nidId":"MA00965", "nidid":"", "levels":[ { "slug":"stage.bottom of normal", "label":"Bottom of Normal", "parameter":"Stage-Pool", "base_parameter":"Stage", "tsid":"CBD.Stage-Pool.Inst.0.Bottom of Normal", "latest_value":0, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stage.streambed", "label":"Streambed", "parameter":"Stage-Pool", "base_parameter":"Stage", "tsid":"CBD.Stage-Pool.Inst.0.Streambed", "latest_value":0, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stage.top of dam", "label":"Top of Dam", "parameter":"Stage-Pool", "base_parameter":"Stage", "tsid":"CBD.Stage-Pool.Inst.0.Top of Dam", "latest_value":85, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stage.top of flood", "label":"Top of Flood", "parameter":"Stage-Pool", "base_parameter":"Stage", "tsid":"CBD.Stage-Pool.Inst.0.Top of Flood", "latest_value":63, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stage.top of normal", "label":"Top of Normal", "parameter":"Stage-Pool", "base_parameter":"Stage", "tsid":"CBD.Stage-Pool.Inst.0.Top of Normal", "latest_value":0, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stor.bottom of normal", "label":"Bottom of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CBD.Stor.Inst.0.Bottom of Normal", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of flood", "label":"Top of Flood", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CBD.Stor.Inst.0.Top of Flood", "latest_value":3740, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of normal", "label":"Top of Normal", "parameter":"Stor", "base_parameter":"Stor", "tsid":"CBD.Stor.Inst.0.Top of Normal", "latest_value":0, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":550381, "associatedStructuresCount":1, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":85, "damLength":900, "distance":null, "drainageArea":8, "eapId":1, "dsacAssignedDate":"2017-05-25T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2024-12-20T12:00:00.000Z", "eapLastRevDate":"2018-03-29T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"MA00965", "oldFederalId":"MA00965", "hazardId":4, "hydraulicHeight":80, "inspectionAuthorityId":0, "inspectionDate":"2021-06-01T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":42.073485369, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-72.2904144089999, "maxDischarge":10750, "maxStorage":5400, "nidHeight":85, "nidStorage":5400, "normalStorage":0, "numberOfLocks":0, "operationalStatusDate":"2017-05-25T12:00:00.000Z", "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":"Dams do not eliminate all risk of flooding. USACE works to address all types of flood risk associated with the dam. Dams have limited capacity to store water. Water may be released through the dam to manage water levels up or downstream or to relieve pressure on the dam to maintain its structural integrity. Severe weather events that bring inconsistent or larger amounts of water into the system can also lead to dam releases or in some cases overwhelm and lead to issues occurring at a dam. \n\nA Periodic Assessment of Conant Brook Dam and Dike was made in 2016. That assessment showed that the risk was driven by three different Risk Drivers. The first was internal erosion of the embankment next to the left spillway training wall. The risk here is considered because this area of the dam has never been loaded, so we don't have performance history. But, the design of the dam has several features that mitigate the possibility, including very strict compaction requirements during construction and a gently battered spillway training wall. The design flood would only load this area for about 2 to 3 hours, which would not likely be enough time to develop a crack through the embankment. This, the chance of this failure is considered remote\n\nThe other two risk driving failure modes were overwash erosion leading to headcutting on the dam or the dike. There are 2 feet of freeboard from the design storm, so the risk from major storms is based on possible waves lapping over the embankments. We anticipate about 0.2 feet of wave action for about 2 to three hours. Because of the rock slope protection of the embankment, the chance of this risk driver leading to failure of either the dam or the dike is considered remote.", "riskManagementMeasures":"USACE manages dam-related flood risks by continually monitoring the condition and health of the dam, prioritizing activities that will most impact the risks, and engaging upstream and downstream emergency managers and members of the public to raise awareness of the dam and support actions to prepare and be ready to respond in the case of a dam-related emergency. USACE works closely with local emergency managers to share what is known about the dam and support the development of local emergency and evacuation plans. USACE regularly updates the emergency action plan for the dam. Regular maintenance and repairs are performed as needed to keep the dam functioning properly. \n\nConant Brook Dam is staffed full time in conjunction with East Brimfield Dam and Westville Dam by personnel trained in dam safety. Project staff are in routine contact with downstream communities. Instruments are reviewed monthly to look for changes in embankment behavior. During high pools and as requested, the dam is visited by dam safety engineers.", "riverName":"CONANT BROOK", "separateStructuresCount":1, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":100, "stateFedId":"MA00965", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":85, "submitDate":"2023-02-16T17:25:25.922Z", "surfaceArea":1, "volume":338825, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1966, "congDist":"Congressional District 01, Massachusetts", "city":"MONSON", "county":"Hampden", "aiannh":null, "websiteUrl":"https://www.nae.usace.army.mil/Missions/Civil-Works/Flood-Risk-Management/Massachusetts/Conant-Brook/", "coreTypeIds":"3", "damTypeIds":"9;8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"1", "nonFederalDamOnFederalId":0, "designerNames":"CENAE", "otherNames":"Dry Reservoir", "ownerNames":"USACE - New England District", "ownerTypeIds":"3", "primaryDamTypeId":9, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9", "dsacId":4, "femaRegion":"1", "lastEapExcerDate":"2024-04-05T12:00:00.000Z", "dataUpdated":"2024-12-20T12:00:00.000Z", "usaceDistrict":"New England District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"010802", "doi_region":null, "doi_region_name":"North Atlantic-Appalachian", "doi_region_number":1 }, "id":8035021, "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.wwdh.internetofwater.app?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.wwdh.internetofwater.app?f=html" }, { "rel":"self", "type":"application/geo+json", "title":"This document as JSON", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/8035021?f=json" }, { "rel":"alternate", "type":"application/ld+json", "title":"This document as RDF (JSON-LD)", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/8035021?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/8035021?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }