HomeMy WebLinkAboutEngineer's Letter-OWTS Size VerifiedCauowtuwO
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Color odo Rive r E ngi nee ring
P.A. Box 7341-
Rifle, CO 81650
(970) 62s-4933
CRE lob No. 1236':{CORPORAT}:D
s/28/2024
Kari Conley
3200 Hwy 325
Rifle Co 8L650
Via Email only:. Kari conlev@comcast.com
RE: Rifle Gap House - Wastewater Treatment - County OWTS Permit#; SEPT-6584
Dear Ms. Conley,
Colorado River Engineering, lnc. designed the Onsite Wastewater Treatment System (OWTS) for the 3-
bedroom home at 3200 HWY 325. We understand you propose to add a garage and bedroom. Based
on the review of county regulations, our design calculations, and as-constructed documents it is our
opinion that the existing OWTS can meet county regulations for a 4-bedroom house and does not need
to be modified. The extra capacity exists in the OWTS because two of the system components were
conservatively oversized. First, the septic tank volume is 1,500 gallons and exceeds the 1,250 gallon
minimum for a 4-bedroom home, Second, the adsorption field was oversized by 20% and can
accommodate the L6%increase in loading for the extra bedroom (450 gal/day to 525 gal/day; Table
6-1 of the county regulations).
Please feel free to contact me directly at 970-625-4933 ext i.L0 or my mobile number 970-61-8-8L35
should you have any questions or require clarification to this Scope of Services,
Sincerely,
Christopher Manera, P, E
Principal Engineer
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