Two words carry most of the location language in bass fishing, and they're routinely used interchangeably when they mean different things. Structure is the shape of the lake bottom itself — the contours that were there before the dam and will be there after: points, channels, humps, flats. Cover is anything sitting on that bottom: wood, rock, grass, docks. The distinction matters because they answer different questions. Structure explains why fish are in an area; cover explains where in that area they're sitting. Every seasonal movement in the Seasonal Bass Behavior chapter runs along structure; nearly every cast lands on cover.

The Structure Glossary

• Point — A finger of bottom extending into deeper water. The single most reliable structure in a reservoir because it's a natural travel route between depth and shallow water. A main-lake point sits on the main body; a secondary point is inside a creek arm, between the creek mouth and the back — the classic prespawn staging structure.
• Channel — The old riverbed (main channel) or creek bed (creek channel) that ran through the valley before it flooded. The deepest continuous water in any area and the interstate highway system fish migrate along.
• Channel swing — Where a channel bends into a bank before curving away. The swing puts deep water against the shore, giving fish depth, a feeding shelf, and vertical escape in one spot. Swings are automatic waypoints in every season.
• Ledge / drop-off — A defined depth break, usually the lip where a flat falls into a channel. Fish hold on the break itself, sliding up to feed and down to rest.
• Hump — An underwater island: shallow top, deep water all around. Isolated humps near a channel are summer magnets, and the ones that never break the surface get a fraction of the pressure that visible structure does.
• Flat — A broad area of consistent depth. Featureless flats are the water you eliminate; flats with a ditch, a hard-bottom patch, or scattered cover are spawning territory and fall feeding grounds.
• Ditch / drain — A subtle depression running across a flat toward deeper water — sometimes only a foot or two deep. Ditches are the on-ramps fish actually use to cross flats; find the ditch and you've found the traffic lane.
• Saddle — The lower ground between two high spots, such as a hump and a point. Fish and bait funnel through saddles the way wind funnels through a gap.
• Bluff — A steep-to-vertical rock bank, usually where the channel runs against it. Winter and summer structure: fish change depth without traveling. The bluff end — where vertical rock tapers back to a normal bank — is the sweet spot.
• Man-made structure — NC reservoirs are flooded farm valleys, and the pre-lake landscape is still down there: roadbeds (hard bottom in straight lines, often with ditches on both sides), pond dams (a ledge in the middle of nowhere), house foundations, and bridge crossings. Old topo maps and side imaging find them; they fish like natural structure with better bottom hardness.

The Cover Glossary

• Laydown — A fallen tree. The trunk is a highway, the outer limbs are ambush cover, and the root ball end holds the biggest fish more often than not. The best laydowns reach from the bank into real depth.
• Standing timber — Flooded trees left standing. Fish relate to specific trees — usually the isolated ones, the leaning ones, and the ones on a channel edge — not to the forest.
• Stumps — The remains of cleared timber, concentrated in rows where fencerows and field edges ran. A stump row crossing a point is a spot, not a piece of cover.
• Brush pile — Planted cover, usually sunk by anglers and dock owners on the structure they intend to fish. The dominant offshore cover on NC reservoirs; finding other people's brush with side imaging is half of summer fishing.
• Docks — Shade, vertical posts, and overhead security in one package, twelve months a year. The best docks combine depth access, age (older wood posts grow more life), and isolation. Skipping docks is its own discipline — and the reason the 6'6"–6'10" rod length exists in Chapter 1.
• Riprap — Placed rock along dams, bridges, and causeways. Warms fast in early spring, hosts the shad spawn in May, and holds craws all year.
• Grass — Where present: hydrilla, milfoil, and native vegetation. The edges and holes matter more than the middle; a grass line adjoining depth is the highest-percentage version.
• Mats — Surface-matted vegetation and debris. Overhead cover with a shaded room underneath — frog and punch territory, straight from those technique guides.
• Rock transitions — Bottom changes: chunk rock to pea gravel, rock to clay, gravel to sand. Bass treat the seam between two bottom types as an edge and patrol it. Transitions show as brightness changes on side imaging.
• Seawalls and bridge pilings — Vertical man-made cover. Walls collect shad spawns and shade lines; pilings are current-adjacent ambush posts.

Where the Money Is: Cover on Structure

Neither list catches fish by itself. A brush pile in the middle of a dead flat is furniture; a bare point is a road with no reason to stop. The high-percentage water is always the intersection — cover sitting on structure: the laydown on the channel swing, the brush pile on the secondary point, the stump row where the ditch crosses the flat, the dock nearest the creek channel. This is what "the spot on the spot" means: the structure concentrates fish in an area, and the one best piece of cover on it concentrates them to a cast.

Two prioritization rules follow:

• Isolated beats abundant. One laydown on a quarter mile of bare bank will hold a fish; the fiftieth laydown on a wood-choked bank is a lottery ticket. The rarer cover is in an area, the more each piece concentrates fish.
• The best spot holds the best fish. Dominant fish claim the cover with the best combination of depth access, shade, and ambush angle. When a spot replenishes after you catch one, it replenishes from the next fish in line — which is why great spots stay great for years.

Reading a Bank From the Boat

The bank you can see predicts the bottom you can't: bank angle continues underwater. A steep clay bank keeps dropping; a flat gravel bank runs shallow a long way out. That one rule lets you rough out the contour of a whole creek arm on the idle in. Refinements:

• 45-degree banks are the year-round compromise — enough slope for depth access, enough shelf to feed on. When you don't know where fish are vertically, transition banks find them fastest.
• Inside vs outside bends: on any channel bend, the outside is steep and deep (the swing), the inside is a shallow bar or flat. Fish feed up on the inside bar and live on the outside swing.
• Watch for bank transitions — where rock becomes clay, where red clay becomes gravel, where bank grass starts. The change continues underwater, and the seam is an edge fish use.

Bass Are Edge Animals

Almost everything above reduces to one principle: bass position on edges — lines where one thing becomes another. Depth edges (ledges, channel lips), cover edges (the grass line, the outside limbs of a laydown), bottom edges (rock-to-clay transitions), shade edges (the dock shadow line, which moves all day), current edges (the seam beside moving water), and clarity edges (where stained water meets clear). An edge gives a bass concealment on one side and open hunting ground on the other. When a spot has multiple edges stacked — a shade line over a bottom transition on a channel swing — you've found the spot on the spot without seeing a single fish. This idea gets its full treatment in Bass Positioning Theory.

Anatomy of an NC Reservoir

Every reservoir on the site's water list is a dammed river valley, and they all share the same broad layout:

• Upper end (riverine): shallow, stained, current-influenced, cover-rich. Warms first in spring, fishes shallow nearly year-round, and gives up the most fish per mile — at average sizes.
• Mid-lake (transition): the mix — defined creek arms, the best secondary points, and most of the classic seasonal migration water. If a chapter of this guide had to be fished on one section, it's this one.
• Lower end (lacustrine): deep, clear, steep, closest to the dam. Structure fishing, finesse, and the winter and summer thermocline games live here.

The old river channel connects all three — and every creek arm is a miniature of the same layout, with its own riverine back, transition middle, and deep mouth. That self-similarity is why one seasonal model works lake-wide: fish the creek arm the way you'd fish the lake, scaled down.

Quick Reference

Keep Reading

• Seasonal Bass Behavior — when fish use each piece of this vocabulary
• Bass Positioning Theory — the edge principle in full
• Electronics & Sonar — finding all of it with side imaging
• Boat Positioning & Casting Angles — how to approach a spot once you've found it