I don't know how the population is in that area, but I doubt the rains would have damaged them. Be careful which suckers you keep from the western slope, only white and longnose are legal to keep.
This is from the regulations and note that bluehead, flannelmouth, mountain, razorback, and Rio Grande (east slope) are illegal to keep. So if you don't know how to positively ID the different species on the West Slope, don't keep it!
It is illegal to take or use the following: Arkansas darter, bluehead sucker, bonytail chub,
boreal toad, brassy minnow, Colorado pikeminnow, common shiner, flannelmouth sucker, flathead
chub, greenback cutthroat trout, humpback chub, Iowa darter, lake chub, mollusks, mountain sucker,
northern leopard frog, northern redbelly dace, plains leopard frog, plains minnow, plains topminnow,
plains orangethroat darter, razorback sucker, Rio Grande chub, Rio Grande sucker, river shiner, roundtail
chub, southern redbelly dace, stonecat, suckermouth minnow, wood frog and Woodhouse’s toad.