HomeMy WebLinkAboutPermit Field Test & Inspection Report 1999-11-15
PORGE ENGINEERING
Fax:541-4H5-5bL4
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POAGE ENGINE~R1NG &SURVE~, INC.
CIVIL I MUI'IICIPAL ENGINEElllNG . SEWEll & W^Tf:1l SYSTEMS . SURVEVING
November 15, 1999
Fax Transmittal
. (541) 726-3689
City of Springfield Building De:partment
Attn: Dave Puent
Building inspector
Re:: Storm Drainal!e/Runnff for the: Fairhaven Subdivision develonme:nt
I have made an inspection of the above referenced site to assess the need for foundation drains.
The soil type is mapped as Oxl!'y gravelly silt loam, but a site investigation revealed that the
characteristics more closely resemble; :Salem gravelly silt loam (which is mapped near this site).
The soil is well drained and the penne!lbilityis moderate to rapid; the percolation rate is estimated
to be over 4 inches per hour. FClundatjon drains are not necessary on this site to assure the
protection of the proposed structures.
Anothe:r consideration is the ground wat~ table elevation. Oxley soli formations normally have
perched water tables that are ne:lIf the surface. Salem soil formalions have water tables that are
greater than six feet deep. In either case, high ground water should Rot be a problem because the
drainage channel to the north would allow a perched water table to "drain".
additional information.
Don B. Mogstad, P.E.
# 17255
1111
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