El Paso County water master plan warns about Denver Basin Aquifer depletions

Denver Basin Aquifer System graphic credit USGS.

Click here to go to the El Paso County website for the project.

From The Colorado Springs Gazette (Rachel Riley):

The document says the county’s current water supply is about 146,000 acre-feet per year, but demand is expected to increase to about 160,000 acre-feet per year by 2040 and 206,000 acre-feet per year by 2060…

The plan, prepared by Englewood-based engineering firm Forsgren Associates Inc., makes a variety of recommendations for closing the gap, including monitoring groundwater well levels, exploring ways to reuse water, finding new water sources and considering changes to the county’s land use approval process.

The county is home to more than 21,300 permitted groundwater wells and roughly 70 water providers, from small districts to municipal departments, according to the plan.

Water providers in once rural parts of the county, such as Monument, face mounting concerns about how to ensure that residents have enough water as the population continues to rise.

The primary water source for areas that are not served by Colorado Springs Utilities is the Denver Basin. Experts say it’s hard to pinpoint the rate at which water levels are falling in the system of aquifers, which were filled by precipitation over many years.

By 2060, the county’s current annual supply would be enough to serve a little more than half of the projected population, according to the plan. More residents could potentially be served by Denver Basin groundwater, but only if it’s still economical to pump, the plan states.

Per state law, county commissioners generally decide if there’s sufficient water to serve a new development during final platting, the stage of the land use approval process in which lots are created, said Mark Gebhart, deputy director of the county Planning and Community Development Department.

But the plan suggests that the county consider changing its rules so that determination can be made earlier, such as when a preliminary plan or zoning change is approved, to help ensure that new developments are planned with water supply in mind.

The plan also recommends that the county re-evaluate a subdivision regulation that requires developers to prove that they have a 300 years’ supply of water. The requirement, three times as stringent as a state standard that requires proof of 100 years’ supply, could be waived if developers agree to conservation-minded practices, such as reuse of captured wastewater to offset demands, the plan suggests…

The plan also advises that the county encourage water providers to find more reliable water sources that are replenished regularly by precipitation, rather than deep groundwater sources that are slow to recharge. One possibility might be importing water from the Arkansas River, the plan states.

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