05-0770 Petra Comment Review 2 022108RECEIVED
FEB 2 2 1008
February 21, 2008
Jim Gibsom, P.E.
City of Yelm
Community Development Department
]OS Yelm Avenue West
PO Box 479
Yelm, WA 98597
RE: Samantha Ridge -City of Yelm Project No. PRD-OS-00770-YL
Response Letter to Second Review of Civil Construction Documents
Mr. Gibson,
T7ris letter is in response to the City of Yelm's second review of civil construction
documents comment letter. This response letter follows the same numbering sequence as
you letter dated January 20, 2008. Below are our responses.
Drainage and Erosion Control Report:
1. The post development summary header has been changed to the correct
header, please see revised Drainage and Erosion Control Report.
2. Both existing impervious and pervious azeas are now shown.
3. Please see revised Drainage and Erosion Control Report.
4. Per the 1992 Department of Ecology Stormwater Design Manua] using the
SBDH method each storm event is treated as a sepazate event, not one
continuous event. Please see revised Drainage and Erosion Control
Report for safety factors added to the design.
5. Orifice sizing was accomplished using StormShed 2G sofrware.
6. Please see revised civil plans showing the 100 year overflow.
7. A Discharge Permit has been submitted to the Department of Ecology,
both ads have been run and we are in the 30 day waiting period for the
NPDES permit.
8. Level spreader sizing was accomplished using StormShed 2G sofrware.
9. All utilities have been re-located to avoid conflicts with [he stormwater
pond.
Sewer Plan Review:
] 0. Only 8 tanks are now proposed for this project (one per building).
11. Please see revised civil plans; tank sizes on plans are per DOE's criteria
for Sewer Works Design Manual.
12. Please see revised civil plans. Notes were added addressing this issue.
13. All sewer details are now standard city of Yelm details.
535llOCK 5'fRFFf I SUITC 213 1 I4l OMA I WA 198402 1 PHOnh (~~3)7> -7617 1 PAX (253)761-8582 1 www. PFCRAENGNC~r
14. Please see revised civil plans; an end of line clean-out has been added.
15. Please see revised civil plans; service lines are now labeled as such.
t6. Please see revised civil plans; all gravity side sewers aze now shown.
17. Please see revised civil plans; all pump control panels are now mounted on
remote posts.
18. Please see revised civil plans; all Carson boxes are now shown.
19. Please see revised civil plans; notes have been added to address this issue.
20. Please see revised civil plans; the reclaimed water line is now labeled and
relocated.
Stormwater and Grading Plan Review:
21. Please see revised civil plans; catch basin callous have been revised.
22. Please see revised civil plans; roof drains leaders and connections are now
shown and labeled.
23. Please see revised civil plans, the 2% minimum driveway callout has been
added to the plans.
Water Plan Review:
24. Please see revised civil plans; a reduced pressure backflow assembly has
been added.
25. Please see revised civil plans; proper horizontal and vertical separation has
been added.
26. Please see revised civil plans; the proposed water main now connects
directly to the existing water main.
27. Please see revised civil plans; all gate valves have been replaced with core
stops.
28. Please see revised civil plans; the backflow assembly is now behind the
water meter.
29. Please see revised civil plans; the water main to be removed is now
labeled.
Irrigation Plan Review:
30. Irrigation plans will be submitted under separate cover.
Misc. Comments:
31. CBU has been replaced with a detail from [he manufacture and the City of
Yelm's Postmaster has approved this.
Thankfy~ou////~J
~lti ~j .~-
Pete Swan'
Engineering Technician