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This dataset is a subset of the National Inventory of Dams for Solano County, California and the supplying waterways in Napa County. |
| summary:
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This dataset is a subset of the National Inventory of Dams for Solano County, California and the supplying waterways in Napa County. |
| extent:
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[[-122.2427,38.0738000000001],[-121.8137,38.5134]] |
| accessInformation:
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U.S. Army Corps of Engineers |
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thumbnail/thumbnail.png |
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Feature Access","Feature Service","providerSDS","Service"] |
| description:
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<div style='text-align:Left;'><div><div><p><span>The National Inventory of Dams (NID) is a congressionally authorized database maintained and published by the U.S. Army Corps of Engineers (USACE), in cooperation with the Association of State Dam Safety Officials, states/territories, and federal agencies.</span></p><p><span>Date Accessed: 02/02/2026</span></p><p><span>Date Downloaded: 02/02/2026</span></p><p><span>Date Uploaded to Portal: ---</span></p><p><span>Fields:</span></p><ul><li><p><span style='font-size:12pt'>Dam Name: Official name of the dam. No abbreviations unless the abbreviation is part of the official name. If no official name exists, use the popular name.</span></p></li><li><p><span style='font-size:12pt'>Other Names: Names other than the official name (e.g., reservoir name) in common use. Multiple names separated by a semicolon. Blank if not applicable.</span></p></li><li><p><span style='font-size:12pt'>Former Names: Previous reservoir or dam name(s), if changed. Multiple names separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>NID ID: Official National Inventory of Dams identification number (required). Assigned and maintained by State Dam Safety Offices. Typically begins with a two-letter state abbreviation followed by a unique number/alphanumeric identifier.</span></p></li><li><p><span style='font-size:12pt'>Other Structure ID: Identification number (e.g., S001, S002) of a separate structure (saddle dam/dike) associated with the dam project. Blank for primary dams.</span></p></li><li><p><span style='font-size:12pt'>Federal ID: Unique identifier for each dam record. For associated structures: primary dam’s NID ID + Other Structure ID. Otherwise equals the NID ID.</span></p></li><li><p><span style='font-size:12pt'>Owner Names: Name(s) of the dam owner. Multiple owners separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Owner Types: Category describing dam owner(s). If more than one owner type, types are separated by a semicolon. Allowed values: Federal; Local Government; Private; Public Utility; State; Tribe; Not Listed.</span></p></li><li><p><span style='font-size:12pt'>Primary Owner Type: Primary category describing the owner type. If more than one owner type, the main owner type is used.</span></p></li><li><p><span style='font-size:12pt'>Number of Associated Structures: Number of separate structures (saddle dams/dikes) associated with this project. Does not include appurtenant works (spillways, outlet works, conduits, etc.).</span></p></li><li><p><span style='font-size:12pt'>Is Associated Structure?: Calculated field. Yes if an Other Structure ID exists (indicating the record is an associated structure to a primary dam).</span></p></li><li><p><span style='font-size:12pt'>Designer Names: Name of principal firm(s)/agency responsible for design of the dam and major appurtenant operating features and modifications. Original designer listed first, then modification designers (if any). Names separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Non-Federal Dam on Federal Property: Indicates whether this dam is a non-federal dam located on federal property.</span></p></li><li><p><span style='font-size:12pt'>Primary Purpose: Main purpose for which the reservoir is used. If more than one purpose, the most important is used.</span></p></li><li><p><span style='font-size:12pt'>Purposes: Current purpose(s) for which the reservoir is used. Multiple purposes separated by a semicolon in decreasing importance. The first listed purpose is designated as Primary Purpose. Allowed values: Debris Control; Fire Protection, Stock, Or Small Farm Pond; Fish and Wildlife Pond; Flood Risk Reduction (to include Storm Water Management); Grade Stabilization; Hydroelectric; Irrigation; Navigation; Recreation; Tailings; Water Supply; Other.</span></p></li><li><p><span style='font-size:12pt'>Source Agency: Calculated field. Primary state or federal agency responsible for providing and updating NID data for the dam.</span></p></li><li><p><span style='font-size:12pt'>State or Federal Agency ID: State or Agency identification number for the dam (if applicable).</span></p></li><li><p><span style='font-size:12pt'>Latitude: Latitude at dam centerline as a single value in decimal degrees, NAD83.</span></p></li><li><p><span style='font-size:12pt'>Longitude: Longitude at dam centerline as a single value in decimal degrees, NAD83.</span></p></li><li><p><span style='font-size:12pt'>State: State where the dam is located.</span></p></li><li><p><span style='font-size:12pt'>County: County in which the dam is located.</span></p></li><li><p><span style='font-size:12pt'>Nearest Downstream City/Town: Name of the nearest downstream city/town/village most likely to be affected by floods resulting from dam failure.</span></p></li><li><p><span style='font-size:12pt'>Distance to Nearest City/Town: Distance from the dam to the nearest affected downstream city/town/village (to the nearest mile, and tenth if appropriate).</span></p></li><li><p><span style='font-size:12pt'>River or Stream: Official name of the river/stream on which the dam is built. If unnamed, identify as tributary to a named river (e.g., Snake-TR). If offstream, use river/stream name plus “-OS” (e.g., Snake-OS). Alternative formatting may be provided and converted prior to inclusion.</span></p></li><li><p><span style='font-size:12pt'>Congressional District: Calculated field. Congressional District derived from coordinates. Blank if coordinates are not provided.</span></p></li><li><p><span style='font-size:12pt'>AIANNH: Calculated field. Name of applicable American Indian/Alaska Native/Native Hawaiian area (reservation/trust land/HHL/etc.).</span></p></li><li><p><span style='font-size:12pt'>State Regulated Dam: Calculated field. Yes if State Permitting Authority, State Inspection Authority, State Enforcement Authority, and State Jurisdictional Dam are all Yes; otherwise No.</span></p></li><li><p><span style='font-size:12pt'>State Jurisdictional Dam: Yes if the dam meets the state regulatory organization’s definition of a jurisdictional dam.</span></p></li><li><p><span style='font-size:12pt'>State Regulatory Agency: Primary state agency with regulatory or approval authority for the dam.</span></p></li><li><p><span style='font-size:12pt'>State Permitting Authority: Yes if the state has authority to review/approve plans and specifications to construct, enlarge, remove, and abandon dams.</span></p></li><li><p><span style='font-size:12pt'>State Inspection Authority: Yes if the state has authority to require or perform inspections (at least once every five years) for dams posing a significant threat to human life/property in case of failure.</span></p></li><li><p><span style='font-size:12pt'>State Enforcement Authority: Yes if the state has authority to require maintenance/remedial work or other actions, including breaching dams when necessary.</span></p></li><li><p><span style='font-size:12pt'>Federally Regulated Dam: Calculated field. Yes if a Federal Agency is listed as involved in regulatory aspects of the dam; otherwise No.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Owner: Federal agency that owns the dam (or a component). Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Funding: Federal agency/agencies involved in funding. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Design: Federal agency/agencies involved in design. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Construction: Federal agency/agencies involved in construction. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Regulatory: Federal agency/agencies involved in regulation. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Inspection: Federal agency/agencies involved in inspection. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement in Operation: Federal agency/agencies involved in operation. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Federal Agency Involvement – Other: Federal agency/agencies involved in other aspects. Multiple agencies separated by a semicolon.</span></p></li><li><p><span style='font-size:12pt'>Built Under the Authority of the Secretary of Agriculture: Indicates whether the dam was designed and built by NRCS through one of the Watershed Program authorizations.</span></p></li><li><p><span style='font-size:12pt'>NRCS Watershed Dam Authorization: If applicable, the specific authorization. Allowed values: Flood Control Act of 1944 (Public Law 78-534); 1953 Pilot Watershed Program (Public Law 83-156); Watershed Protection and Flood Prevention Act of 1954 (Public Law 83-566); 1962 Resource Conservation and Development Act (Public Law 87-703).</span></p></li><li><p><span style='font-size:12pt'>Primary Dam Type: Main type of dam. If more than one type exists, the most dominant is used.</span></p></li><li><p><span style='font-size:12pt'>Dam Type: Dam type(s). Multiple separated by semicolons. Allowed values: Arch; Buttress; Concrete; Earth; Gravity; Masonry; Multi-Arch; Rockfill; Roller-Compacted Concrete; Stone; Timber Crib; Other.</span></p></li><li><p><span style='font-size:12pt'>Core: Position, type, and certainty of watertight member. Position: Upstream Facing; Homogeneous dam; Core; Unlisted/Unknown. Type: Bituminous Concrete; Concrete; Earth; Metal; Plastic; Unlisted/Unknown. Certainty: Known; Estimated.</span></p></li><li><p><span style='font-size:12pt'>Foundation: Foundation material and certainty. Foundation: Rock; Rock and Soil; Soil; Unlisted/Unknown. Certainty: Known; Estimated.</span></p></li><li><p><span style='font-size:12pt'>Dam Height: Height (ft) to nearest foot. Vertical distance between the lowest point on the crest and the lowest point in the original streambed.</span></p></li><li><p><span style='font-size:12pt'>Hydraulic Height: Hydraulic height (ft) to nearest foot. Vertical difference between maximum design water level and lowest point in original streambed.</span></p></li><li><p><span style='font-size:12pt'>Structural Height: Structural height (ft) to nearest foot. Vertical distance from lowest excavated foundation to the top of the dam (top refers to parapet wall, not crest).</span></p></li><li><p><span style='font-size:12pt'>NID Height: Calculated field. Maximum of Dam Height, Structural Height, and Hydraulic Height.</span></p></li><li><p><span style='font-size:12pt'>NID Height Category: Calculated field. Based on NID Height: less than 25 ft; 25-49 ft; 50-100 ft; greater than 100 ft.</span></p></li><li><p><span style='font-size:12pt'>Dam Length: Length (ft) along the top of the dam including attached spillway/powerplant/navigation lock/fish pass when these form part of the dam length.</span></p></li><li><p><span style='font-size:12pt'>Volume (of Dam): Total cubic yards of materials in the dam structure. Includes integral powerhouse/locks/spillways only if integral and required for structural stability.</span></p></li><li><p><span style='font-size:12pt'>Year Completed: Four-digit year the original main dam structure was completed. Blank if unknown and no reasonable estimate exists.</span></p></li><li><p><span style='font-size:12pt'>Year Completed Category: Calculated field. Category based on Year Completed (e.g., before 1900, 1900-1909, … Since 2000, Undetermined).</span></p></li><li><p><span style='font-size:12pt'>Year Modified: Four-digit year major modifications/rehabilitation were completed.</span></p></li><li><p><span style='font-size:12pt'>Modification Type: Type of modification. Allowed values: Foundation; Hydraulic; Mechanical; Seismic; Structural; Other.</span></p></li><li><p><span style='font-size:12pt'>NID Storage: Calculated field. Maximum of Normal Storage and Maximum Storage.</span></p></li><li><p><span style='font-size:12pt'>Maximum Storage: Maximum storage (acre-feet). Total storage below maximum attainable water surface elevation (includes surcharge storage).</span></p></li><li><p><span style='font-size:12pt'>Normal Storage: Normal storage (acre-feet). Total storage below normal retention level (includes dead/inactive; excludes flood control/surcharge). Normally dry dams = 0. Blank if unknown (not zero).</span></p></li><li><p><span style='font-size:12pt'>Surface Area: Surface area (acres) of the impoundment at normal retention level.</span></p></li><li><p><span style='font-size:12pt'>Drainage Area: Drainage area (square miles) that drains to the dam location.</span></p></li><li><p><span style='font-size:12pt'>Maximum Discharge: Spillway discharge capacity (cfs) when reservoir is at maximum designed water surface elevation.</span></p></li><li><p><span style='font-size:12pt'>Spillway Type: Type of spillway. Allowed values: Controlled; Uncontrolled; None.</span></p></li><li><p><span style='font-size:12pt'>Spillway Width: Width (ft) of spillway available for discharge at maximum designed water surface elevation (open channel: bottom width; pipe/drop inlet: diameter).</span></p></li><li><p><span style='font-size:12pt'>Number of Locks: Number of existing navigation locks for the project.</span></p></li><li><p><span style='font-size:12pt'>Length of Locks: Length (ft) of the primary navigation lock to the nearest foot.</span></p></li><li><p><span style='font-size:12pt'>Lock Width: Width (ft) of the primary navigation lock to the nearest foot.</span></p></li><li><p><span style='font-size:12pt'>Length of Secondary Lock: Length (ft) of the secondary navigation lock to the nearest foot.</span></p></li><li><p><span style='font-size:12pt'>Secondary Lock Width: Width (ft) of the secondary navigation lock to the nearest foot.</span></p></li><li><p><span style='font-size:12pt'>Outlet Gate Type: Type(s) of spillway and controlled outlet gates (up to five types in decreasing size order, separated by semicolons, followed by number of gates). Allowed values: None; Uncontrolled; Tainter (radial); Vertical Lift; Roller; Bascule; Drum; Needle; Flap; Slide (sluice gate); Valve; Other controlled.</span></p></li><li><p><span style='font-size:12pt'>Data Last Updated: Calculated field. Date data was submitted to USACE for inclusion in the NID, or date the regulatory agency updated the NID database directly.</span></p></li><li><p><span style='font-size:12pt'>Last Inspection Date: Date of the most recent periodic or comprehensive inspection of the dam prior to NID data transmittal.</span></p></li><li><p><span style='font-size:12pt'>Inspection Frequency: Scheduled frequency interval for periodic/comprehensive inspections (years).</span></p></li><li><p><span style='font-size:12pt'>Hazard Potential Classification: Potential downstream hazard from failure or mis-operation (not a condition/risk rating). Allowed values: Low; Significant; High; Undetermined.</span></p></li><li><p><span style='font-size:12pt'>Condition Assessment: Condition based on available information. Allowed values: Satisfactory; Fair; Poor; Unsatisfactory; Not Rated; Not Available.</span></p></li><li><p><span style='font-size:12pt'>Condition Assessment Date: Date of the most recent condition assessment prior to NID data transmittal.</span></p></li><li><p><span style='font-size:12pt'>Operational Status: Operational/remediation status based on available information. Allowed values: Normal Operations; Under Investigation, Planning, Permitting, or Design for Remediation; Under Remediation; Enforcement Pending/Ongoing; Not Applicable; Not Available.</span></p></li><li><p><span style='font-size:12pt'>Operational Status Date: Date of the most recent operational status assessment prior to NID data transmittal.</span></p></li><li><p><span style='font-size:12pt'>Emergency Action Plan (EAP Prepared): Indicates whether an Emergency Action Plan is developed by the owner. Allowed values: Yes; No; Not Required (by regulatory agency).</span></p></li><li><p><span style='font-size:12pt'>EAP Last Revision Date: Date of the most recent revision of the EAP prior to NID data transmittal.</span></p></li><li><p><span style='font-size:12pt'>Last EAP Exercise Date: Date of the most recent EAP exercise (U.S. Army Corps of Engineers dams only).</span></p></li><li><p><span style='font-size:12pt'>Emergency Contacts Updated: Date the EAP emergency contact lists were last updated (U.S. Army Corps of Engineers dams only).</span></p></li><li><p><span style='font-size:12pt'>EAP Meets FEMA Guidelines: Indicates whether the EAP meets FEMA 64 guidelines (U.S. Army Corps of Engineers dams only).</span></p></li><li><p><span style='font-size:12pt'>Inundation Maps Added to NID: Indicates whether inundation maps/scenarios are accessible through the NID.</span></p></li><li><p><span style='font-size:12pt'>Website URL: Website for more information on the specific dam or regulatory agency.</span></p></li></ul><p><span /></p></div></div></div> |
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<div style='text-align:Left;'><div><div><p><span>Solano County Disclaimer: By using this data, the user acknowledges that it is possible that errors and omissions will occur in data input or programming done by the County or for the County to provide the GIS layers and/or other data in the form desired. The user further understands and agrees that it is possible that errors and omissions will occur in record keeping processes, especially when large numbers of records are developed and maintained, and that data may not meet the user's standards as to accuracy or completeness. Notwithstanding, the user agrees to take the data “as is”, fully expecting that there may be errors and omissions associated with the data. The user further understands and agrees that the County makes absolutely no warranty whatsoever, whether expressed or implied, as to the accuracy, thoroughness, value, quality, validity, merchantability, suitability, condition or fitness for a particular purpose of the data or any programming used to obtain the data, nor as to whether the data is error-free, up-to-date, complete or based upon accurate or meaningful facts. This data layer was made using Solano County GIS files with varying degrees of scale, accuracy, precision, correctness, and alignment and therefore cannot be used for situations requiring survey grade measurement. Solano County disclaims liability for any loss that may result from the use of its data and user accepts any and all risks associated with using this data. User acknowledges data limitations and accepts responsibility for data based judgments.</span></p></div></div></div> |
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| title:
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Solano_NID_Dams |
| type:
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Feature Service |
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| tags:
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["solano","dams","national inventory of dams","usace"] |
| culture:
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en-US |
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| name:
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Solano_NID_Dams |
| guid:
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33425E4C-3EAA-4C9F-B5D5-6F62609D8047 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |