June evenings cool fast around Spring Valley, and by dawn every lawn in town is carrying dew it will lose by nine. The ground here sheds water quickly — thin soil over limestone — so keeping turf even through a dry stretch is a matter of attention rather than luck. Valley Lake Irrigation gives lawns that attention: mowing on a rhythm, trimming and edging held to a line, a yard kept in the kind of order that reads as effortless from the road. When the corn is tall and the afternoons run long and hot, a well-kept lawn is the coolest-looking thing on the street. Lawn care in Spring Valley and out along the valley roads toward Chatfield and Stewartville.