Colorado Well Finder › Wells by county › Boulder County › St. Ann Highlands
Buying land in St. Ann Highlands means planning around fractured mountain bedrock, not a predictable shallow sand-and-gravel aquifer. Records for permitted wells within five miles show a median completed depth of 285 feet, a median reported yield of 7.0 gallons per minute, and a median static water level of 50 feet below ground.
Those figures are useful for early budgeting, but they are not a guarantee for a particular lot. A driller still needs to evaluate the exact ridge, drainage, bedrock, access, and nearby well results. The records include Bonanza Mountain Estates, Nederland, Sugarloaf, Mountain Meadows, Gold Hill, and Rollinsville, giving buyers a broad local comparison.
Figures are computed from Colorado Division of Water Resources permit records for permitted wells within 5 miles of St. Ann Highlands. Not every permit reports every field; each statistic uses the wells that report it.
| Depth statistic | Feet |
|---|---|
| 25th percentile | 165 |
| Median | 285 |
| 75th percentile | 402 |
| 90th percentile | 525 |
| Deepest on record | 1,301 |
| Aquifer named on permits | Wells |
|---|---|
| unnamed / fractured-bedrock aquifer | 2,451 |
| Fractured Crystalline | 15 |
| Fractured Granite | 4 |
| Yield statistic | gpm |
|---|---|
| 25th percentile | 5.0 |
| Median | 7.0 |
| 75th percentile | 10.0 |
| Median depth to water | 50 ft |
| Median water level by decade | Depth to water |
|---|---|
| 1970s | 25 ft |
| 1980s | 38 ft |
| 2010s | 60 ft |
| 2020s | 60 ft |
Reported well depths vary widely in this mountain setting. The median is 285 feet, while the middle half runs from 165 to 402 feet. That range is the practical starting point for a drilling estimate: a bid based only on the median can miss a lot that needs substantially more hole.
The depth mix tells the same story. 40% of wells are between 100 and 300 feet, and 42% fall between 300 and 600 feet. Only 11% are under 100 feet, while 7% reach 600 feet or more. The deepest recorded well is 1,301 feet. Fractured granite, gneiss, elevation, and local fracture zones drive the difference from one parcel to the next.
Among wells with a reported pump yield, the median is 7.0 gallons per minute, with the middle half between 5.0 and 10.0 gallons per minute. That is a workable range for many household wells, but yield is not the same as unlimited water storage. A storage tank and pressure system help manage household demand when the well refills slowly.
The local results are fairly concentrated: 70% report between 5 and 15 gallons per minute. Another 19% are between 1 and 5 gallons per minute, while 3% are under 1 gallon per minute. The low-yield group is small but important. Ask for the well completion report, pumping test, and any production history before relying on a well for a new home.
The reported static water level has a median of 50 feet below the surface, with the middle half from 25 to 90 feet. Static level is the water depth after the well has rested; it is not the same as the depth of the well or the level while pumping. A driller uses both the static level and expected drawdown when sizing the pump.
The decade data suggests water levels were deeper in the more recent measurements: the median was 25 feet below surface in the 1970s, 38 feet in the 1980s, and 60 feet in both the 2010s and 2020s. This points to a possible decline in the recorded measurements, but only 96 wells report static water levels. It is not enough to predict the trend on one parcel.
The permit history is long, with 2,527 wells in the surrounding record set and 1,786 recorded as constructed. The most active listed driller is Ground Water Systems Inc. under Wilson, Richard R., with 724 records. Ingram Drilling Inc. under Ingram, Stephen E. has 174, and C R Smith Drilling Inc. under Smith, Frank has 130.
Permit activity peaked in the 1970s with 595 permits, followed by 462 in the 1990s and 385 in the 1980s. There are also 72 permits from the 2020s, and the newest permit year is 2025. Use nearby permits as clues, not guarantees. DWR records can show construction details, aquifer descriptions, yield, and water level when those fields were reported.
Local drilling is priced around fractured mountain bedrock, including granite and gneiss. The drilling model uses $65 to $100 per foot. At the local median depth of 285 feet, that puts the drilled hole at about $18,500 to $28,500.
A finished water system costs more than the hole. Including the pump, pressure tank, trenching, and electrical work, the modeled total is about $24,500 to $40,500 at that median depth. A lot that requires a 525-foot well or deeper can move beyond that range, as can difficult access, extra casing or grout, or difficult trenching. Get a written bid that separates drilling, casing, testing, pump equipment, electrical, and site work.
Fractured-bedrock wells can be unpredictable. One lot may intersect a productive fracture while another nearby hole produces much less or requires more depth. The records show 3% of reported yields under 1 gallon per minute, and not every permitted well reports a yield. A dry hole or weak well is a real due-diligence risk, so review neighboring completion reports and obtain a drilling opinion before closing.
Water quality also deserves testing. The surrounding area includes 16 PFAS sampling or contamination sites, 1,201 historic mine features, and 56 EPA Superfund or cleanup sites within about ten miles. That does not establish contamination at a specific property. Test the existing well for common household contaminants and site-specific concerns, and consider septic setbacks, replacement area, driveway access, building location, and electrical trench routes before finalizing a plan.
| Decade permitted | Wells |
|---|---|
| 1950s | 10 |
| 1960s | 80 |
| 1970s | 595 |
| 1980s | 385 |
| 1990s | 462 |
| 2000s | 281 |
| 2010s | 151 |
| 2020s | 72 |
| Most active drillers on record | Wells |
|---|---|
| Ground Water Systems Inc (Wilson, Richard R.) | 724 |
| Ingram Drilling Inc. (Ingram, Stephen E.) | 174 |
| C R Smith Drilling Inc (Smith, Frank) | 130 |
How this is built: the median permitted depth here times the per-foot range for this ground, plus the normal system costs. A lot at the 75th-percentile depth (402 ft) would run roughly $32,130–$52,200. See the full Colorado well cost guide.
Counts come from EPA, USGS and state datasets layered on the Colorado Well Finder map. A count is not a verdict on any one well; it tells you what to test for.
The numbers above are the area average. Your lot is one point on the map. Search the address to see the real depth, yield and aquifer of each permitted well around it.
Map wells near St. Ann HighlandsTri-Lakes Contracting is a licensed Colorado contractor serving St. Ann Highlands and nearby mountain communities. The company handles access driveways, site development, new-build septic systems, and custom homes from early planning through construction.
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A listing photo can't tell you whether a lot is a dream or a money pit. Two parcels near St. Ann Highlands can carry the same asking price while one needs an $80,000 driveway and a $45,000 engineered septic the other doesn't. The well numbers on this page are the start of that answer. A Tri-Lakes Site Feasibility Report is the rest of it: a licensed general contractor, excavator and septic installer reads the parcel the way we would if we were about to build on it, and puts the real cost in writing before your money is committed.
Spend a little to know. Or gamble a lot to guess. Realtors sell the view and inspectors look at houses that already exist. We're the people who'd build it, so we catch what quietly turns a "great deal" into a budget disaster: bad access, buried rock, steep grade, soil that won't pass for a normal septic, water that's a fortune to reach. And if the lot is good, you've already got a builder ready to do the work, driveway to drywall.
Under contract, comparing parcels, or a realtor with a rural listing whose buyers keep asking "what will it cost to build here?" This is the due-diligence step almost everyone skips, and the one that saves the most.
Driveway, site work, septic or a build near St. Ann Highlands. Licensed GC, excavator and septic installer.
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The median reported well depth within five miles of St. Ann Highlands is 285 feet. The middle half runs from 165 to 402 feet. About 42% of wells are between 300 and 600 feet, and the deepest record is 1,301 feet. Fractured mountain bedrock makes the depth at one parcel different from the depth at a nearby property.
The drilling model uses $65 to $100 per foot. At the local median depth of 285 feet, the drilled hole is estimated at $18,500 to $28,500. A finished system with pump, tank, trenching, and electrical work is estimated at $24,500 to $40,500. Greater depth, difficult access, and site conditions can increase the bid.
The median reported pump yield is 7.0 gallons per minute, and the middle half is 5.0 to 10.0 gallons per minute. About 70% of reported wells produce between 5 and 15 gallons per minute. About 3% report under 1 gallon per minute, so buyers should review the actual completion report and pumping information for the property.
Safety cannot be determined from the well location alone. The area has 16 PFAS sampling or contamination sites, 1,201 historic mine features, and 56 EPA Superfund or cleanup sites within about ten miles. Those mapped features do not prove a problem at a particular home. Test the well, especially when buying, building, or placing a septic system.
The recorded decade medians suggest deeper water levels in more recent measurements: 25 feet below surface in the 1970s, 38 feet in the 1980s, and 60 feet in both the 2010s and 2020s. However, only 96 wells report static water levels. That limited sample cannot predict the water level or long-term performance of an individual lot.
All wells in Boulder County — county-wide depth, yield and cost figures.
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