Engineers Response Ltr 011108Cur's ull;;;q "-r;l;recrs
January 09,2008
Mr. Jim Gibson
City of Yelm
Community Development Department
105 Yelm Avenue West
P.O. Bax 479
Yelm, WA 98597
Subject Tahoma Terra Fairway Multi Family - SPR OS-0750-YL
Revised Site Construction Drawings
Mr. Gibson:
KPFF has received the comments from your letter dated January 4, 2008. We have addressed the
issues you presented and our response is outlined below:
1. See Drainage Profiles on Sheet 11 for location and depth of the thicker fractured rock
sections.
2. An 18" deep treatment layer of soil will be preserved or amended as part of the design. See
Part 1, Section 1 of the Storm Drainage report for details on the treatment layer.
3. Further discussion regarding Cation Exchange Rate of the soils has been included in Part 1,
Section 1 of the Storm Drainage report.
4. Conditions of Approval Item No. 13, has been added to the cover sheet.
5. The City of Yelm detail has been replaced with the WSDOT ADA detail on Sheet 8 (C4.2).
6. Sheet 9 (C5.0) depicts a depressed area between Buildings 2 and 3 as described in Part 1,
Section 1 of the Drainage Report. This area has been designed to collect and infiltrate all
stormwater runoff in this area. The wall design will accommodate any potential stormwater
runoff that could convey to the wall.
7. Agate valve and a 22 1/2-degree bend have been installed at the water and sewer
connection points in Terra Valley. The existing mains have been removed past the
connection points. See Sheet 12 (C6.0) and Sheet 18 (C7.0).
8. The water main has been deflected from station 0+70.28 to station 2+44.19 as requested
by the City of Yelm. See Sheet 12 (C6.0).
9. The Tee at station 4+06.50 has been revised. See Sheet 13 (C6.1.).
10. The Tee at station 4+06.54 has been revised. See Sheet 13 (C6.1.).
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Mr. Jim Gibson
January 10, 2008
Page 2 of 3
11. The fire hydrant runs have all been revised. See Sheets 13-14 (C6.1-C6.2).
12. A Double Check Valve Assembly has been added to the irrigation meter line. See Sheet 14
(C6.2).
13. The 2" gate valve is shown on the Tee at station 5+29.37. A 2" gate valve has been added
at station 6+54.09. See 14 (C6.2)
14. A note has been added on Sheet 15 (C6.3) regarding thrust blocking.
15. Comment noted on Sheet 15 (C6.3).
16. The titles have been corrected. See Sheets 19-20 (C7.1-C7.2).
17. All piping connections have been changed to Slip Joint (SJ) fittings with the exception of the
valve connections, which are still Mechanical Joint (MJ) fittings.
18. Air Release Assemblies have been relocated out of the roadway. See Sheet 12 (C6.0) and
Sheet 18 (C7.0).
19. Side Sewer Cleanouts have been identified within 2' of each building. See Sheets 19-20
(C7.1-C7.2).
20. Hose bib locations are shown on Water Plan Sheets C6.1-C6.2. Additional notes have been
shown on the Sewer Plan Sheets C7.1-C7.2.
21. Relevant details for this project are reflected on Sheet 21 (C7.3).
22. Detail 7-22 had been replaced with detail 7-20.
23. The location of all Valve boxes (Carson boxes) has been indicated on Sheets 19-20 (C7.1-
C7.2).
24. Scale of the bends in the side sewer lines has been increased to reflect two 45-degree
bends.
25. The profile title on Sheet 20 (C7.2) has been corrected.
26. The sewer lines going from the STEP Tank to the main have been noted as "Service Line."
27. No additional oak trees will be removed to construct the pathway. A note regarding the
removal of the small fir trees has been added to Sheet 22 (C8.0).
28. The pathway surface material is identified on Sheet 23 (C8.1).
29. Additional landscaping has been included around the buildings to conform to Yelm
Municipal Code. See Sheet 22 (C8.0).
30. Additional landscaping has been included around the parking areas to conform to Yelm
Municipal Code. See Sheet 22 (C8.0).
31. Prior to final construction completion, interpretive signage for the wetlands shall be installed
per coordination with Ciry of Yelm. See note on Sheet 22 (C8.0).
32. Prior to final construction completion, interpretive signage for the oak stands shall be
installed per coordination with City of Yelm. See note on Sheet 22 (C8.0).
33. See irrigation note on Sheet 23 (C8.1).
Mr. Jim Gibson
January 10,2008
Page 3 of 3
34. A note regarding preservation of the wetland buffer has been added to Sheet 23 (C8.1).
35. The surtace material for the basketball court has been noted on Sheet 8 (C4.2).
Should you have any questions, or need additional information, please do not hesitate to give me a
call at (360) 292-7230, or by a-mail nancv whalev@koff.com.
Sincerely,
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Nancy M. Whaley
Design Engineer
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Enclosure(s)
406032.03