HomeMy WebLinkAboutHARMONY RIDGE PUD, PHASE 2 (2ND FILING) - PRELIMINARY / FINAL - 49-95D - SUBMITTAL DOCUMENTS - ROUND 5 - REVISIONS. , , 0
TST, INC.
haven't changed and we believe the quality of runoff hasn't changed. I spoke
with Gary Stadele, the president of the Trilby Lateral Ditch whose concern
was sediment runoff into the ditch. We have added a 1 foot ditch inside of
the silt fence to capture sediment during construction (see detail on grading
sheets).
3. Cannot provide relief for the angle of the storm crossing the Trilby Lateral
Ditch due to constraints between the retaining walls and the ditch easement.
A ditch crossing detail was added on the detail sheet requiring a cut-off wall
and encasement of the storm sewer.
4. Offsite drainage easement descriptions were added to the back of the
drainage report. When the storm line leaves the drainage and utility
easement it is still in the Trilby Lateral Ditch easement where it would be no
matter where it crossed the ditch.
5. The outlet erosion protection for Line ST-2 has been calculated and riprap
has been placed to reduce the outlet to non -erosive velocities. Historically,
this swale drained 60% of this site which has not been significantly changed.
6. See street sheets for spot elevations.
7. Currently working with Trilby Lateral Ditch Company to receive approval.
8. Placed riprap at the ends of the street flowlines and a 4' sidewalk culvert at
the end of the south flowline. North and south flowline drainage enter
existing historic drainage outfalls.
9. The Fromme Prairie Way design was aligned with the street design to the
north of this project. The roadway is then tapered to enter the parking lot
below.
10. Acknowledged, revised on plans.
11. Acknowledged on last submittal comments. See swale G-G on sheet 4.
12. Acknowledged, revised on plans.
13. Planner will address this comment.
Sincerely,
TTSS,T, INC. CONSULTING ENGINEERS
Mike R. Jacobson
I 1 1 4
TST, INC.
12. In the transition area, a negative cross slope is required for proper tie-in to
adjoining street. With a pan, this is usually the case.
13. Acknowledged, revised on plans.
14. Stationing was started at the end of the tie-in street where construction was
ended for Phase 1.
15. Acknowledged, revised on plans.
16. Acknowledged, revised on plans.
17. Acknowledged, revised on plans.
18. Acknowledged, revised on plans.
19. Acknowledged, revised on plans.
20. Acknowledged, revised on plans.
21. Acknowledged, revised on plans.
22. Acknowledged, revised on plans.
23. Placed riprap at the ends of the street flowlines and a 4' sidewalk culvert at the
end of the south flowline. North and south flowline drainage enter existing
historic drainage outfalls.
24. This is a private street. Flares are not needed because the drive is 24' wide.
25. See cover sheet of the Utility Plans for explanation. There is groundwater in only
one of the bore sites.
26. Planner will address this comment.
27. Planner will address this comment.
28. Acknowledged
The following are the responses to the Stormwater comment sheet dated 3/21/2001.
Please refer to the response letter dated March 20, 2001 for the previous submittal.
Many of the same comments were responded to at that time.
1. Acknowledged, revised on plans.
2. Per a letter to Glen Schlueter on March 20, 2001 for the previous submittal, a
variance is being requested for the runoff in Sub basin E1 that crosses the
Trilby Lateral Ditch. The historic drainage pattern hasn't been altered, the
flow rate has decreased from historic, the historic concentration points
September 14, 2001
Mr. Steve Olt
City of Fort Collins
Current Planning
P.O. Box 580
Fort Collins, CO 80522-0580
Re: Harmony Ridge P.U.D., Second Filing
Project No. 0927-010
Dear Mr. Olt:
The following are the responses to the Engineering comment sheet dated 3/21/2001.
Please refer to the response letter dated March 20, 2001 for the previous submittal.
Many of the same comments were responded to at that time.
1. Redlines have been returned.
2. Acknowledged
3. The only plat attachment was the Planning and Zoning Board Certification
approval which has been added.
4. Site lots have been changed.
5. Area is already an easement.
6. The Water District has been approached allowing the developer to plat
easements and R.O.W. over their easement. We will provide a confirmation
letter from the district prior to public hearing. The Water District easement will
be modified within the boundaries of this plat.
7. Ditch Company signature block added to sheets 1 and 4.
8. Spot elevations indicate the beginning of the transition area.
9. Acknowledged, revised on plans.
10. The K value is correct. The curve ends at the center of the inlet with a tangent
line of—0.50%. The grade has been added to the plans.
11. Drainage easement vacated with plat.
TST, INC. 748 Whalers Way - Building 1)
Fort Collins, CO 80525
Consulting Engineers 19701 226-0557
Metro (303) 595-9103
Fax (970) 226-0204
Email info@tstinc.com
www.tstinc.com
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