Archaeological and historical evidence points to more intensive settlement in tidewater regions such as the lower courses of streams like the Eel and Mad rivers and along the shores of Humboldt Bay. The open Pacific shore was evidently not used to any great extent. Villages were spaced a mile or so apart along the watercourses, with inhabitants numbering 50 to 150 persons. Permanent dwellings, occupied by two or more families, were rectangular and made from split redwood planks with two-or three-pitch roofs, a smoke hole at the top, and side entrances with sliding doors. Each village also Usually had a sweat house, shaped like the dwellings but smaller and with only a two-pitch roof. Conical plank huts were used only for camping.