Nymphing a limestoner is always the default technique. Day in and day out, the fish just feed better on the bottom than on the surface. For Spring Creek sowbugs and shrimp (scuds) are 24-7-365 flies, patterns that work virtually year round. Zebra Midges, to match the midges on the water, also make sense. Wet black ants, a pattern that has been used in Pennsylvania for almost 90 years, are deadly fished along the banks and under riparian vegetation.
Tricos have begun on Spring Creek over the last week. I wish I could say that they have the fish rising well, but that is not the case. The combination of above average water levels and cooler than normal over night low temperatures have pushed the spinner falls later into the morning. After 9 AM winds pick up and often blow the little mayflies completely off the water.
This situation will improve as the weather begins to warm this week. Higher overnight air temperatures will force the Trico spinners to the surface quicker (the rate of their descent is controlled by dehydration). Consequently, the spinner falls will be more concentrated and produce better rising activity.
State College PA