Continue shopping “Construction of the Hoover Dam Then and Now” has been added to your cart. Remove item Thumbnail image Product Price Quantity Subtotal × A Guide to Preventing Heat Stress and Cold Stress $10.00 A Guide to Preventing Heat Stress and Cold Stress quantity $10.00 × Construction of the Hoover Dam $35.00 Construction of the Hoover Dam Then and Now quantity $35.00 Coupon: Apply coupon Update cart Cart totals Subtotal $45.00 Total $45.00 — OR — Proceed to checkout