Heise Road partially reopened Friday morning following a mudslide triggered by heavy rainfall, though officials warned that additional precipitation forecast for the region could destabilize slopes anew.
The roadway east of Heise Bridge became accessible again at 9 a.m. Friday, according to local authorities. However, the gravel section west of the bridge that provides access to Cress Creek remains closed to the public.
Thursday’s intense rainfall fell across a burn area near Heise, sending debris and water cascading down the mountainside. While engineers assessed conditions and determined that slopes have since stabilized, the window for additional instability remains open.
“Although the slopes have stabilized, additional rain and debris flow are possible. Please use extreme caution,” Jefferson County Emergency Manager Rebecca Squires told officials, as reported by East Idaho News.
Weather forecasters issued caution for the entire region Friday, with precipitation expected to develop across much of eastern Idaho throughout the day. Andrew McKaughan, a meteorologist with the National Weather Service, noted that higher elevations face the greatest likelihood of rain, with scattered showers and possible thunderstorms anticipated.
“Most of eastern Idaho has a pretty decent chance of some precipitation today, especially across the higher terrain,” McKaughan told East Idaho News.
The Snake Plain, which encompasses lower-lying agricultural and populated areas, also faces potential precipitation Friday. Forecasters indicated that scattered conditions rather than uniform rainfall are most probable, meaning some areas may remain dry while others receive significant amounts.
The mudslide underscores the vulnerability of East Idaho’s infrastructure during active weather periods, particularly in areas scarred by wildfire. Burn zones lose vegetation that normally anchors soil and channels water, making them prone to debris flows when heavy rain occurs. The combination of denuded slopes and saturated ground creates conditions where even moderate rainfall can trigger dangerous slides.
Residents and travelers in the Heise area should monitor local weather updates and exercise caution on reopened roads. Officials advised checking conditions before attempting to use affected routes, particularly the closed western section near Cress Creek.
The reopening of Heise Road provides some relief for traffic patterns in Bonneville County and surrounding areas, though the partial closure continues to affect access to certain recreational and residential zones. The full reopening of the western gravel section will depend on continued slope stability and further weather assessment.
Friday’s rain forecast adds urgency to cleanup efforts and inspection work underway in the mudslide zone. Precipitation that arrives could either prove light enough to avoid additional flows or heavy enough to trigger new debris movement, depending on rainfall intensity and duration.
What Comes Next
Authorities plan to continue monitoring slope conditions and weather forecasts throughout Friday and into the weekend. Decisions about reopening the western section of Heise Road will likely depend on whether precipitation arrives as predicted and how saturated the affected terrain becomes. Residents should check local emergency management updates before planning trips to the Heise area.