Rio Grande at Johnson Ranch

The past week

What floods at each level

• 28.4 ft

  the river reaches record stage (1978). Major flooding begins upstream in Cottonwood Campground at Castolon. Most park roads near the river flood.

• 19 ft

  the river reaches major flood stage. Flooding begins to occur upstream in Cottonwood Campground at Castolon, as stages at each location are practically synonymous. Moderate lowland flooding begins at the gage site, but no damage occurs. The gage is inaccessible, as River Road is impassable at several locations.

• 15 ft

  flood stage is reached. Moderate lowland flooding begins. Roads that lead to Cottonwood Campground and River Road may flood. Stages are practically synonymous with the gage at Cottonwood Campground at Castolon (CSTT2), and therefore represent the reach from Santa Elena Canyon through Cottonwood Campground, where damage may occur. Cattle also graze in the lowlands, and may be threatened.

• 12 ft

  the river reaches bankfull, minor lowland flooding occurs, and no significant damage is expected.

Highest crests on record

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