Plot.plot({
projection: { type: "mercator", domain: hydrocountiesEPSG4326 },
width,
color: {legend:true, label: "Completion Year"},
marks: [
Plot.geo(basinsEPSG4326, Plot.pointer(Plot.centroid({stroke:"yellow"}))),
Plot.geo(basinsEPSG4326, {stroke: "lightgray"}),
Plot.geo(geoGRDams, {stroke: "darkblue", fill: (d) => d.properties.Completion, r: (d) => d.properties.Capacity}),
Plot.geo(hydrocountiesEPSG4326, {stroke: "black"}),
],
})