View: Project Documents
| Agency | Comment | ||
|---|---|---|---|
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PCD Project Manager
3/22/2022 9:23:01 AM |
Wildland Fire & Hazard Mitigation Plan - the exhibit you have provided is fine but we will also need a copy of the Crystal Park wildfire and hazard mitigation plan. | 3/22/2022 9:23:01 AM | |
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Colorado Geological Survey
3/21/2022 8:29:57 AM |
CGS previously commented on this referral dated January 18, 2022. The applicant proposes a single-family residence at 570 Dayspring View in the Crystal Park development. We received a geologic hazard investigation (Entech Engineering, Inc., revised March 2, 2022). Entech’s geologic hazard report generally addressed our previous concerns with the site, specifically: Rockfall: On page 5 of Entech’s report, “the majority of the potential source areas are stable in their present condition with only smaller 3 to 4-inch sized loose rocks observed on the slope and do not pose a significant rockfall hazard.” The existing rocks and boulders are likely to be disturbed during construction activities and/or freeze/thaw, resulting in an increased potential for a rockfall hazard. It may be prudent to remove such rocks during construction. CGS agrees with Entech’s recommendation of “stabilization by removal of smaller loose rocks, often referred to as scaling. Any scaling should be performed under existing conditions prior to any earthwork that would remove existing vegetation and change soil characteristics that could alter where the rocks roll. Temporary barriers should be used to protect existing buildings during scaling operations.” CGS recommends that Entech is contacted to make observations to determine what rocks should be stabilized prior to construction. Also, as recommended by Entech, “A well-defined swale should be created to direct surface flow and debris around the structure.” CGS recommends that Entech’s recommendations and mitigation methods be noted on the site plan. Steep Slopes and Construction-Related Slope Instability: Available LiDAR show slopes exceeding 30 percent upslope and downslope from the proposed residence. There are risks associated with construction on steep slopes, such as are present at this site. While mapped landslides are not present, there are risks associated with construction on these steep slopes where erosion is also a significant constraint. As noted on page 3 of Entech’s report, “No signs of recent slope failures were observed on the site. In these areas of downslope creep, we would anticipate lateral and vertical movement of the near surface soils in the downslope direction.” CGS agrees with Entech that “The design of foundations in these areas should account for this additional pressure,” and “Tie beams and buttresses are recommended to stiffen the foundation system.” Entech’s slope stability analysis satisfactorily addresses our concerns regarding slope instability. Entech’s recommendations, such as (Figure No: D-2) “FDN immediately upgradient of slope must be embedded a minimum of 8’-0” below exist. grade,” and “14’-0” max. cut into exist. slope.” CGS recommends that these recommendations are included in the site plan. Geologic Hazard Disclosure Statement: CGS recommends the geologic hazards and constraints be included in the preliminary/site plan. In summary, Entech provides appropriate mitigation measures for the geologic hazards associated with the site. Provided Entech’s recommendations are strictly adhered to and included on the site plan, CGS has no objection to the site plan approval. Submitted 3/21/2022 by Amy Crandall, Engineering Geologist, Colorado Geological Survey (303-384-2632 or acrandall@mines.edu) |
3/21/2022 8:29:57 AM | |
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PCD Project Manager
1/19/2022 10:57:20 AM |
Please include the following on the site plan drawing: 1. Building dimensions showing structures greater than 100 feet from adjacent structures 2. Existing vegetation including any vegetation to be removed / landscape and revegetation plan 3. Alternative well site 4. Distance from any adjacent well or sewage systems if within 100 feet of the site |
1/19/2022 10:57:20 AM | |
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PCD Project Manager
1/19/2022 10:42:15 AM |
Wildland Fire & Hazard Mitigation Plan - the exhibit you have provided is fine but we will also need a copy of the Crystal Park wildfire and hazard mitigation plan. | 1/19/2022 10:42:15 AM | |
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PCD Project Manager
1/19/2022 10:40:55 AM |
Please ensure BESQCP has been approved and fee paid. | 1/19/2022 10:40:55 AM | |
| View |
Colorado Geological Survey
1/18/2022 11:56:15 AM |
1/18/2022 11:56:15 AM | |
| View |
El Paso County Conservation Dist
1/5/2022 8:58:13 AM |
1/5/2022 8:58:13 AM | |
| View |
El Paso County Conservation Dist
1/5/2022 8:54:32 AM |
1/5/2022 8:54:32 AM |
EDARP