Colorado Well Finder › Wells by county › Boulder County › Allenspark
Buying land in Allenspark means dealing with mountain bedrock, variable well depths, and water records that are useful but not complete. The wells mapped within 5 miles show what nearby owners have encountered, but a permit record cannot guarantee the result on a particular lot.
Most permitted wells serve domestic or household uses, and the records are concentrated in fractured-bedrock aquifers. That makes the neighboring well pattern worth reviewing before you buy, build, or request a drilling bid. The practical questions are depth, yield, water level, access for a rig, and how the well will work with septic and the planned home.
Figures are computed from Colorado Division of Water Resources permit records for permitted wells within 5 miles of Allenspark. Not every permit reports every field; each statistic uses the wells that report it.
| Depth statistic | Feet |
|---|---|
| 25th percentile | 145 |
| Median | 260 |
| 75th percentile | 400 |
| 90th percentile | 600 |
| Deepest on record | 1,102 |
| Aquifer named on permits | Wells |
|---|---|
| unnamed / fractured-bedrock aquifer | 1,072 |
| Fractured Granite | 13 |
| Fractured Crystalline | 7 |
| Yield statistic | gpm |
|---|---|
| 25th percentile | 5.0 |
| Median | 7.0 |
| 75th percentile | 7.8 |
| Median depth to water | 60 ft |
| Median water level by decade | Depth to water |
|---|---|
| 1970s | 18 ft |
| 2010s | 80 ft |
| 2020s | 100 ft |
Recorded well depths near Allenspark have a median of 260 feet. The middle half runs from 145 to 400 feet, so a driller estimating a new well needs to allow for a wide range even before considering the exact parcel. The 90th-percentile depth is 600 feet, and the deepest record reaches 1,102 feet.
The depth mix tells the same story: 16% are under 100 feet, 38% are 100 to 300 feet, 37% are 300 to 600 feet, and 10% are deeper than 600 feet. Most permits name an unnamed or fractured-bedrock aquifer. Fractured granite and fractured crystalline aquifers appear less often in the records, but the local geology is still fundamentally unpredictable from one lot to the next. A neighboring depth is useful for budgeting, not a guarantee.
The reported median pump yield is 7.0 gallons per minute, with the middle half between 5.0 and 7.8 gallons per minute. That is a workable production range for many household systems, but it is not the same as unlimited water. A storage tank and properly sized pump can help a home handle short periods of higher demand.
Yield records are available for 386 wells, fewer than the total number of permitted wells. Four percent report under 1 gallon per minute, 15% report 1 to 5 gallons per minute, 71% report 5 to 15 gallons per minute, and 11% report more than 15 gallons per minute. Ask for the completion report, pumping test information, and any well-use limits. An exempt household-use well is generally subject to Colorado rules, including the 35-gallon-per-minute pumping limit.
Among the 75 wells reporting a static water level, the median depth to water is 60 feet. The middle half is 20 to 100 feet below the surface. That range affects pump setting, trenching, winter protection, and the amount of casing and equipment a contractor may need.
The decade pattern deserves attention. Median reported water levels were 18 feet below the surface in the 1970s, 80 feet in the 2010s, and 100 feet in the 2020s. Those records suggest deeper measured water levels over time, but they do not prove a uniform decline across Allenspark. The wells were not necessarily measured at the same locations, seasons, or pumping conditions. On a property you are considering, request the original well record and compare current performance with the construction report rather than relying on the area median alone.
The permit record covers 1,135 wells, with 788 recorded as constructed and 787 reporting a total depth. Domestic or household use accounts for 92% of the listed use mix. Permit activity was highest in the 1970s, with 198 permits, followed by 187 in the 1990s and 156 in the 1980s. The newest permit year in the records is 2025.
Ingram Drilling Inc., also listed as Ingram, Stephen E., appears most often, with 330 records. Young, Ernest C. appears on 70, and Ground Water Systems Inc., listed with Wilson, Richard R., appears on 61. These records show who has worked in the area; they are not a guarantee of current availability, price, or future performance. Confirm licensing, insurance, references, access requirements, and the precise scope of a new-well contract.
Allenspark drilling is priced for fractured mountain bedrock, including granite and gneiss. The drilling model uses $65 to $100 per foot. At the 260-foot median depth, the drilled hole works out to about $16,900 to $26,000.
A finished system costs more than the hole. Including a pump, pressure tank, trenching, and electrical work, the modeled total at the median depth is about $22,900 to $38,000. A 600-foot or deeper hole can move well beyond that median budget, while a difficult access route or extra casing and grout can also change the bid. Ask whether the proposal includes mobilization, casing, grout, development, testing, permits, pump equipment, electrical service, and restoration. Compare bids using the same scope rather than comparing only a per-foot drilling rate.
Low yield and dry holes are the main physical risks in fractured mountain rock. A nearby well producing 7.0 gallons per minute does not establish that the next fracture will carry the same water. Review nearby completion reports, well depths, yields, static levels, and any failed or abandoned holes. Also confirm that a drilling rig can reach the site and that the proposed well location leaves room for construction and maintenance.
Environmental review matters here. The mapped area within about 10 miles includes 7 PFAS sampling or contamination sites, 50 historic mine features, and 5 EPA Superfund or cleanup sites. Those locations do not automatically mean a particular property has contaminated water. They do justify laboratory testing and a review of site history, especially near mines, old waste areas, or uncertain fill. Septic setbacks, drainfield soil, slope, winter access, and the planned home location should be evaluated with the well together.
Before committing to a lot, pull the DWR permit and construction records for the property and nearby wells. Focus first on depth, yield, static water level, casing, pump information, and the stated use. Areas such as Bark Ranch, Hidden Lake, and Estes Park are useful nearby context, but conditions can change sharply across mountain terrain. Jamestown, Ward, and Gold Hill are also regional reference points, not substitutes for parcel-specific investigation.
For a build, obtain a driller's access and cost review before closing if possible. Pair that with a septic evaluation, a water-quality test, and a site plan showing the well, house, driveway, utilities, and drainfield. If the basin or proposed use requires more water than the permit allows, ask the Division of Water Resources about applicable rules and augmentation requirements. Budget for an uncertain depth and keep a contingency rather than assuming the median result.
| Decade permitted | Wells |
|---|---|
| 1950s | 4 |
| 1960s | 41 |
| 1970s | 198 |
| 1980s | 156 |
| 1990s | 187 |
| 2000s | 115 |
| 2010s | 64 |
| 2020s | 58 |
| Most active drillers on record | Wells |
|---|---|
| Ingram Drilling Inc. (Ingram, Stephen E.) | 330 |
| Young, Ernest C | 70 |
| Ground Water Systems Inc (Wilson, Richard R.) | 61 |
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 (400 ft) would run roughly $32,000–$52,000. 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 AllensparkTri-Lakes Contracting is a licensed Colorado contractor serving Allenspark for access driveways, site development, new-build septic systems, and custom homes. Coordinating these pieces early can help match the building plan to the well site, terrain, and access constraints.
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A listing photo can't tell you whether a lot is a dream or a money pit. Two parcels near Allenspark 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 Allenspark. Licensed GC, excavator and septic installer.
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The median recorded well depth near Allenspark is 260 feet. The middle half runs from 145 to 400 feet, while the 90th-percentile depth is 600 feet. Records include wells under 100 feet and a deepest reported well of 1,102 feet. Fractured mountain bedrock makes the depth on an individual lot difficult to predict.
The local drilling model uses $65 to $100 per foot. At the 260-foot median depth, the drilled hole is estimated at $16,900 to $26,000. A finished system with pump, tank, trenching, and electrical work is estimated at $22,900 to $38,000. Deeper drilling, difficult access, and added construction requirements can increase the total.
The median reported yield is 7.0 gallons per minute, and the middle half is 5.0 to 7.8 gallons per minute. Four percent of reported yields are under 1 gallon per minute, while 71% are 5 to 15 gallons per minute. Yield records cover 386 wells, so request the specific property's testing and completion documents.
Safety cannot be determined from a permit or a nearby well's yield. The mapped area includes 7 PFAS sampling or contamination sites, 50 historic mine features, and 5 EPA Superfund or cleanup sites. Test the property's water through a qualified laboratory and review local site history, especially near mining or cleanup areas. Retest when conditions or ownership change.
The reported median static water level was 18 feet below the surface in the 1970s, 80 feet in the 2010s, and 100 feet in the 2020s. That pattern suggests deeper measured water levels over time, but only 75 wells report static levels and the measurements may differ in location, season, and pumping conditions. Check the individual well record before drawing a conclusion.
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