{ "bbox":null, "type":"Feature", "geometry":{ "bbox":null, "type":"Point", "coordinates":[ -93.67016, 32.31883 ] }, "properties":{ "provider":"MVK", "code":"Wallace Lake", "slug":"wallace%20lake", "elevation":0.0, "horizontal_datum":"NAD27", "vertical_datum":"NGVD29", "state":"LA", "kind":"PROJECT", "nearest_city":"Shreveport", "public_name":"Wallace Lake", "location_code":150013, "nsid":null, "aliases":{ "NIDID":"LA00180", "CWMS Legacy Naming":"Wallace Lake", "CWMS Standard Naming":"Wallace Lake", "SHEF Location ID":"CE41BEA8", "DCP Platform ID":"CE41BEA8" }, "timeseries":[ { "tsid":"Wallace Lake.Flow.Inst.1Hour.0.DCP-rev", "label":"Outflow", "base_parameter":"Flow", "parameter":"Flow", "unit":"cfs", "unit_long_name":"Cubic feet per second", "latest_time":"2026-08-25T21:00:00Z", "latest_value":0.0, "delta24h":null, "sort_order":7, "results":null }, { "tsid":"Wallace Lake.Elev.Inst.1Hour.0.DCP-rev", "label":"Elevation", "base_parameter":"Elev", "parameter":"Elev", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":139.53, "delta24h":null, "sort_order":1, "results":null }, { "tsid":"Wallace Lake-Tailwater.Stage.Inst.1Hour.0.DCP-rev", "label":"Stage Tailwater", "base_parameter":"Stage", "parameter":"Stage", "unit":"ft", "unit_long_name":"Feet", "latest_time":"2026-08-25T21:00:00Z", "latest_value":134.2, "delta24h":null, "sort_order":5, "results":null } ], "name":"Wallace Lake", "hasResopsAverages":"false", "nidId":"LA00180", "nidid":"", "levels":[ { "slug":"elev.streambed", "label":"Streambed", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Wallace Lake.Elev.Inst.0.Streambed", "latest_value":142, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of conservation", "label":"Top of Conservation", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Wallace Lake.Elev.Inst.0.Top of Conservation", "latest_value":142, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of dam", "label":"Top of Dam", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Wallace Lake.Elev.Inst.0.Top of Dam", "latest_value":176, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of flood", "label":"Top of Flood", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Wallace Lake.Elev.Inst.0.Top of Flood", "latest_value":158, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"elev.top of surcharge", "label":"Top of Surcharge", "parameter":"Elev", "base_parameter":"Elev", "tsid":"Wallace Lake.Elev.Inst.0.Top of Surcharge", "latest_value":170.7, "units":"ft", "units_long_name":"Feet", "type":"CONSTANT" }, { "slug":"stor.top of conservation", "label":"Top of Conservation", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Wallace Lake.Stor.Inst.0.Top of Conservation", "latest_value":7800, "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":"Wallace Lake.Stor.Inst.0.Top of Flood", "latest_value":96100, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" }, { "slug":"stor.top of surcharge", "label":"Top of Surcharge", "parameter":"Stor", "base_parameter":"Stor", "tsid":"Wallace Lake.Stor.Inst.0.Top of Surcharge", "latest_value":267700, "units":"ac-ft", "units_long_name":"Acre-feet", "type":"CONSTANT" } ], "id":550408, "associatedStructuresCount":0, "conditionAssessDate":null, "conditionAssessDetail":null, "conditionAssessId":6, "damHeight":null, "damLength":4930, "distance":30, "drainageArea":260, "eapId":1, "dsacAssignedDate":"2022-11-10T12:00:00.000Z", "eapMeetsGuidelinesId":1, "emergencyContactsUpdated":"2025-03-21T12:00:00.000Z", "eapLastRevDate":"2025-03-21T12:00:00.000Z", "enforcementAuthorityId":0, "federalId":"LA00180", "oldFederalId":"LA00180", "hazardId":4, "hydraulicHeight":43, "inspectionAuthorityId":0, "inspectionDate":"2021-07-30T12:00:00.000Z", "inspectionFrequency":5, "jurisdictionAuthorityId":0, "latitude":32.322082299, "lengthOfLocks":0, "secondaryLengthOfLocks":null, "longitude":-93.6702119999999, "maxDischarge":112700, "maxStorage":267748, "nidHeight":48, "nidStorage":267748, "normalStorage":7760, "numberOfLocks":0, "operationalStatusDate":"2022-11-10T12:00:00.000Z", "operationalStatusId":1, "originalDesignerName":null, "otherStructureId":null, "permittingAuthorityId":0, "politicalPartyId":null, "privateDamId":null, "projectDescription":"Wallace Lake Dam is a flood risk management structure owned, operated, and maintained by the U.S. Army Corps of Engineers (USACE), completed in 1946. Located on Wallace Bayou, a tributary of Twelve Mile Bayou in the Red River Basin, the dam helps protect Shreveport, Louisiana, and surrounding areas from damaging floods. The structure provides critical water control benefits while also supporting public recreation in Caddo Parish.\nWallace Lake Dam is an earthen embankment approximately 3,500 feet long and 46 feet high. It was designed to impound floodwaters during periods of high rainfall, gradually releasing water downstream through its gated outlet structure to reduce peak flow and prevent flooding in the Shreveport area. This operation is guided by a congressionally authorized Water Control Plan to optimize flood protection while maintaining seasonal water levels for environmental and recreational purposes.\nThe dam includes a gated concrete conduit at its base that allows precise control of outflows from Wallace Lake into Twelve Mile Bayou. During times of low flow, these gates maintain base streamflow, while in flood conditions, the gates are used to gradually release stored water to mitigate downstream impacts. The project does not feature a traditional spillway; instead, an emergency spillway is designed to pass excess water in extreme flood events, preventing overtopping of the dam.\nWallace Lake itself provides valuable habitat for fish and wildlife and supports recreational uses such as boating, fishing, and birdwatching. Management of lake levels balances these recreational uses with flood risk reduction efforts.\nLike many mid-20th century flood control structures, Wallace Lake Dam continues to be evaluated for performance under modern safety standards, including seismic risk, hydrologic loading, and foundation stability. Ongoing maintenance and periodic safety inspections help ensure the dam remains a reliable component of the region\u2019s flood management infrastructure.", "riskCharSummary":"Wallace Lake Dam significantly reduces downstream flood risks in Caddo and De Soto Parishes, Louisiana; however, it does not eliminate the potential for flooding or dam-related emergencies. Wallace Lake Dam is classified as a Dam Safety Action Classification (DSAC) 4, indicating low incremental risk and low urgency for action, based on the most recent Periodic Assessment (2021).\nAlthough the dam has historically performed as designed, unlikely but high-consequence scenarios could still occur. Three primary potential failure modes (PFMs) drive the project\u2019s life safety risk profile:\n\nShallow slough slides could lower the dam crest, resulting in overtopping under extreme flood conditions.\nSeepage and piping through foundation sands at Sta. 40+00 to 45+00, possibly leading to instability during high head differentials.\nOvertopping erosion during a Probable Maximum Flood (PMF) or larger event, with a modeled breach expected during a 150% PMF event.\nWhile each of these PFMs has a very low annual probability of failure, in such an event, flooding would be swift and potentially deadly, with the greatest risk posed to downstream areas along Bayou Pierre and potentially as far as Powhatan, LA\u2014approximately 50 miles from the dam.\nAdditionally, non-breach flood risks remain a concern. Wallace Lake Dam is designed as a dry detention structure, but under extreme inflows, the uncontrolled spillway and outlet works may not be sufficient to prevent flooding of nearby low-lying developments and in-pool residential neighborhoods. \nWhile there are no dam safety deficiencies currently requiring urgent intervention, key risk management challenges have been identified:\nSeveral shallow slides have occurred on both upstream and downstream slopes, with some unrepaired for extended periods. Surveys reveal low spots along the embankment crest that could reduce freeboard and increase overtopping vulnerability. Cracking in the spillway weir raises concern about stability under high loading conditions, especially when water levels exceed historical maximums. Limited instrumentation, particularly the absence of piezometers or crest reference markers, reduces confidence in seepage and settlement monitoring. Historical sand boils and eroded joints in the abutment walls suggest seepage paths that require continued observation.", "riskManagementMeasures":"Despite these concerns, the project is currently managed under routine operations and maintenance protocols. USACE works to reduce the risks posed to the community by Wallace Lake Dam. USACE operations and engineering staff routinely conduct detailed inspections of the project to ensure the integrity of the dam, identify new deficiencies, and monitor known deficiencies. The dam has a robust instrumentation and monitoring program that allows USACE staff to regularly monitor the dam\u2019s performance under changing pool conditions. The dam\u2019s Emergency Action Plan is updated regularly, and the emergency notification charts are updated annually. This plan has been coordinated with state and local Emergency Management Agencies to help improve their dam incident response planning and preparedness responsibilities. Emergency exercises are routinely held with local and state emergency responders and stakeholders to enhance the local communities\u2019 emergency response plans. Regular maintenance and repairs are performed as needed to keep the dam functioning properly.\nNevertheless, risk communication and public awareness in upstream and downstream communities\u2014particularly around in-pool residential developments\u2014remain areas needing improvement.\nIn the unlikely event of a dam failure or major flood, emergency alerts and evacuation will be critical. Residents in the affected area should stay informed and follow all guidance from local authorities. To better understand your individual risk, visit the National Inventory of Dams (NID) for inundation maps and preparedness resources.", "riverName":"CYPRESS BAYOU", "separateStructuresCount":0, "sourceAgency":"US Army Corps of Engineers", "spillwayTypeId":3, "spillwayWidth":644, "stateFedId":"LA00180", "stateRegulatoryAgency":null, "stateRegulatedId":0, "structuralHeight":48, "submitDate":"2023-02-16T17:25:32.310Z", "surfaceArea":2300, "volume":573353, "widthOfLocks":0, "secondaryWidthOfLocks":null, "yearCompleted":1946, "congDist":"Congressional District 04, Louisiana", "city":"COUSHATTA", "county":"Caddo", "aiannh":null, "websiteUrl":"https://www.usace.army.mil/Missions/Civil-Works/Dam-Safety-Program/Article/2870967/dam-safety-program/", "coreTypeIds":"3", "damTypeIds":"8", "fedConstructionIds":"1", "fedDesignIds":"1", "fedFundingIds":"1", "fedInspectionIds":"1", "fedOperationIds":"1", "fedOtherIds":"1", "fedOwnerIds":"1", "fedRegulatoryIds":"1", "formerNames":null, "foundationTypeIds":"3", "nonFederalDamOnFederalId":0, "designerNames":"CEMVK", "otherNames":"Wallace Lake", "ownerNames":"USACE - Vicksburg District", "ownerTypeIds":"3", "primaryDamTypeId":8, "primaryOwnerTypeId":3, "primaryPurposeId":9, "purposeIds":"9;5", "dsacId":5, "femaRegion":"6", "lastEapExcerDate":"2020-10-14T12:00:00.000Z", "dataUpdated":"2025-07-01T12:00:00.000Z", "usaceDistrict":"Vicksburg District", "noConsequencesId":0, "secretaryAgricultureBuiltId":null, "nrcsWatershedAuthorizationId":null, "isAssociatedStructureId":"No", "fedRegulatedId":"Yes", "inundationNidAddedId":1, "damStatusId":2, "huc06":"111402", "doi_region":null, "doi_region_name":"Mississippi Basin", "doi_region_number":4 }, "id":150013, "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/150013?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/150013?f=jsonld" }, { "rel":"alternate", "type":"text/html", "title":"This document as HTML", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr/items/150013?f=html" }, { "rel":"collection", "type":"application/json", "title":"USACE Access2Water API", "href":"https://api.wwdh.internetofwater.app/collections/usace-edr" } ] }