8284 Review No.2 122701December 27, 2001
Anna M.B. Holt
C.E.S. Northwest, Inc.
5308 12th St. E. Suite B
Fife, Washington 98424
RE: Civil Engineering Review No. 2
Autumn Hill Subdivision
City of Yelm Project No. SUB-01-8284-YL
Dear Ms. Holt:
I have reviewed the plans submitted and dated 12/14/01. (Date of PE stamp). The following are comments from the above referenced plans and need to be addressed on the future submittal.
I have organized these comments by general category. If you have any questions I have also included a set of redlined plans to clarify these comments.
Sewer Plans:
No Comments
Water Plans:
The Tucannon Ct SE. blowoff assembly needs to be located outside of the roadway asphalt. (this was shown on the redlined plans)
Add this line to the cover sheet’s Water Field Verification Note, ALL WATER SYSTEM SHUTDOWNS WILL BE COORDANATED WITH THE CITY OF YELM.
Revise the water profile on Vancil Road to show the watermain over the storm crossing. Also revise the sewer profile to be 18” below the storm crossing. This information shows up one
more than one sheet.
Temporary Erosion and Grading Plans:
The proposed infiltration trenches will be approved as designed. By using this design the rear yards will have to be finished before the Certificate of Occupancy will be signed. If
this is what the developer intends with this design than that is ok. If not you may want to discuss how this is to be accomplished. Note: The City of Yelm and DOE manual only allows
20 inches/hour with type “A” soils so the factor of safety really does not apply.
Stormwater Report:
On page 3 of the report replace the 1.6 with 1.84.
In section 4 Wells and Septic Systems, add the methods used to verify there are no wells and septic systems that will be affected by this development.
In section 5 Fuel Tanks, add the methods used to verify there are no fuel tanks that are within 200’ of this development.
See the comments in the roadway and stormwater section for the “bypass area”.
On page 9, it states, “Detailed calculations will be provided at the time the site development plans are submitted”. Any additional calculations to be approved for infiltration need
to be submitted during this review. If there are no other calculations to be reviewed please disregard this comment.
Page 11, section 11 replace county with city.
Page 12, section 12 add Olympic Air Pollution Control Agency Permit for removal of these structures.
Roadway and Stormwater Plans:
The temporary cul-de-sac on Umtanum St. SE needs to be revised. The rolled curb needs to be located around the outside of the cul-de-sac in typical cul-de-sac format. This is a requirement
from the roadway department.
Add a detail or specify on the plans showing what type of fence is being installed.
The “bypass areas” of Vancil Road needs to be detained. This situation is a condition this development has created with the frontage improvements. The bypass area does not currently
run off to the adjacent property. The City of Yelm does not use the 2001 DOE Stormwater manual so the 5 “bypass” conditions do not apply to this issue. Revise the plans to control
this area. It appears that this issue can be resolved with 2 catchbasins and necessary conveyance piping.
Rolled curb inlets are required, specify on the plans.
Add a detail or specify what the roadway structural sections are.
As per our phone conversation, the deletion of the “bulb out” on Tucannon Ct. SE was approved. However the street section should still be as your design showed on the first submittal.
Please revise this to reflect the first submittal.
Add detail 4-8B to the plans.
Catchbasin No. 1 does not have the required cover. All storm pipes need to maintain at least 1.5 feet of cover over the pipes. When calculating this depth make sure to include the crown
of the road, thickness of the pipe and diameter of the pipe.
The inverts for CB #6 do not match from page to page.
A vertical curve is required for transition from Palouse Ave on to Tucannon Ct SE. The algebraic difference in grade is greater than 1%. This requires a vertical curve.
Misc. Information:
The mailbox location shown needs moved. In this location it will block the subdivision entrance. Revise the location to be shown further into the subdivision. The new location still
needs to be approved by City of Yelm Postmaster.
You need to submit the streetlight plans. These need to be submitted and approved before civil plans will be signed off.
The gravel access road into the pond will be required per the DOE manual and the City of Yelm Public Works Department. Bollards can be added to control the traffic into the stormwater
facility. This needs to be added to the plans.
The conditions of approval require the developer to submit an open space plan, fire flow calculations and a landscape and irrigation plan.
Conditions of Approval dated September 17, 2001:
OK
Not Submitted
At final plat application
Under Review
Under Review
To be paid at Building Permit Issuance
Under Review
To be paid at Building Permit Issuance
Under Review
Under Review
To be paid at Building Permit Issuance. This fee has been changed to $1,500.00 per a house connection as of January 1, 2002.
Under Review
Under Review
At final plat application
Under Review
Under Review
Under Review
Under Review
Not Submitted
Under Review
Not Submitted
Not Submitted
OK
OK
For your information
Must be completed before demolition permit is issued.
Not Submitted.
Please review and revise your engineering drawings. When you resubmit your package, please send 4 revised sets and two drainage reports. If you have any questions or comments, please
call me at (360) 458-8438 and I will be happy to further assist you.
Respectfully
City of Yelm Community Development
Jim Gibson
Development Review Engineer
Cc: Shelly Badger
Cathie Carlson
Tim Peterson
Enc: redlined plans and stormwater report