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Home My WebLink AboutLot Certifications - 03/10/2017 (3)5/26/16 Page 1 CERTIFICATION OF LOT GRADING Pursuant to Fort Collins City Code § 26-544 & City Land Use Code § 3.3.2 (e) Date: Address: Lot: Block: Subdivision: Permit Application #: Larimer County Parcel #: Larimer County Reception #: (on development agreement) I, (print) , a Colorado registered professional engineer, verify that construction of all stormwater facilities and grading is complete and hereby submit this certification. Please answer the following questions by initialing the appropriate response. For each question initialed “No,” attach an explanation detailing how this will affect stormwater drainage for this lot and any adjacent lots. 1. Certification includes attached Stormwater-approved grading plan. (NOTE: City’s Building Department does not approve grading plans). 2. Certification includes the attached as-built survey dated (must be within 60 days of the date the certification is submitted) accurately and truthfully depicting elevations for:  Top of foundation/finished floor  Finished grade on each side of the structure  Quarter points along each lot line (not more than 50 feet apart)  Break points/high points  Swales  Berms  Retaining walls  Air conditioning pads  Window wells  Any other appurtenance(s) within an easement 3. All elevations are within a 0.2 foot tolerance of the approved grading plan. 4. The top of foundation is at least 6 inches above the highest grade surrounding the structure. 5. There is a minimum grade of 5% away from the structure within the first 5 to 10 feet adjacent to the residence. 6. All slopes meet or exceed the minimum requirement of 2% (1% is acceptable on single family lots when the swale is draining the runoff from only two adjoining properties) and are not steeper than 25% (4:1). 7. All flow lines of stormwater drainage swales are a minimum of 6 inches below the elevation of ground adjacent to the structure and will direct drainage as shown on the Stormwater-approved grading plan. 8. All downspout locations and discharge directions are shown on the as-built survey. Runoff is directed into an appropriate drainage system or lot line swale, and it is not directed onto neighboring properties. No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes (SEE NOTES ON ATTACHED AS-BUILT SURVEY) (SEE NOTES ON ATTACHED AS-BUILT SURVEY) (NOTE SPECIAL FOUNDATION DETAIL) (SEE NOTES ON ATTACHED AS-BUILT SURVEY) 5/26/16 Page 2 9. A smooth transition with no vertical offset (step) in grade is provided at the lot line to all adjacent properties. 10. The grading of this lot does not adversely affect neighboring properties or City infrastructure. 11. Landscaping has been completed prior to survey. If not, please indicate who will be responsible for completing landscaping: 12. Final site cleanup has been completed. 13. I personally visited the site as part of the certification process, and in my professional opinion, the as-built survey is an accurate representation of the site conditions.. No Yes No Yes No Yes No Yes No Yes 14. Based on this information, I certify that (check one): □ The elevations and drainage patterns of the lot/site are in substantial conformance with the City approved drainage and grading plan for the property (information attached). □ The elevations and drainage patterns of the lot/site as measured are in general conformance with the City approved drainage plan with exceptions (information attached). In my professional judgment the elevations and grading of the lot/site as constructed are functionally adequate and equivalent to the specifically approved drainage plan, and will affect stormwater drainage on and off the lot/site in a manner consistent with the approved drainage plan. Name: Email: Phone: Company: Address: NOTE: A complete certification must be submitted at least two weeks prior to a request for a Certificate of Occupancy for the lot/site, including, but not limited to, drawings of the lot/site showing the approved design and as-built surveyed elevations of all structures, drainage and grading features, written information/explanation of discrepancies, and other information necessary to confirm the above certification to: Email (preferred) WaterUtilitiesEng@fcgov.com Mailing Address Fort Collins Utilities ATTN: Water Utilities Engineering 281 North College Avenue Fort Collins, CO 80521 Questions? 970-221-6700 PE Stamp Sign and date 03.10.17 UNIT B1 UNIT B2 UNIT B3 UNIT B43 UNIT B5 NOTE SPECIAL FOUNDATION DETAIL. SEE ATTACHED PAGES FOR ADDITIONAL INFORMATION. A SWALE AND CURB CUT WERE ADDED FOR IMPROVED DRAINAGE CONVEYANCE. FLATTER THAN 5%, BUT OK AS LONG AS DOWNSPOUT EXTENSION AND SPLASH BLOCK DISCHARGE DIRECTLY TO FLOWLINE. 1 Nick Haws To:Dan Mogen Subject:manhattan grade vs stone See comments below from the project architect pertaining to finished grade relative to stone veneer. Any potential problems would be purely cosmetic and would not compromise waterproofing or structural integrity. The architect indicates not to worry. This is in part due to the special foundation detailing which extends concrete stem wall above the interior finished floor elevation. For aesthetic reasons, the exterior stone veneer was extended downward to the finished grade (or slightly below). See photographs below the architect’s message. Nick Haws, PE, LEED AP Vice President NORTHERN ENGINEERING 301 N. Howes Street, Suite 100 | Fort Collins, Colorado 80521 O: 970.221.4158 ext. 5414 | D: 970.568.5414 | M: 970.690.0927 nick@northernengineering.com | www.northernengineering.com From: Jon Rentfrow [mailto:jon@rentfrowdesign.com] Sent: Wednesday, October 12, 2016 3:55 PM Cc: Russell Baker <j.russell.baker@outlook.com> Subject: manhattan grade vs stone Russell, There is always a concern that too much soil/ multch will get wet and freeze, possibly creating some issues. The stone is applied as such that it is not acting as your water barrier to wall. I think the worse thing that could happen would be for the stone to pop off from water freezing behind or in the grout. In the end, I wouldn’t worry about it. My opinion… Jon R. Rentfrow Rentfrow Design, LLC 970-412-3400 jon@rentfrowdesign.com www.RentfrowDesign.com 3 1 Dan Mogen From:Nick Haws <nick@northernengineering.com> Sent:Friday, March 10, 2017 4:41 PM To:Dan Mogen Cc:Russell Baker; 'Dan Griffith (dan@etccontracting.com)'; Andy Reese Subject:RE: Manhattan Townhomes | Certification of Lot Grading | Bldg. B Dan, The builder is actually supplying concrete splash blocks at all downspouts. The photograph below is not at the referenced location, but it is at Manhattan Townhomes and is indicative of what is being supplied. This provides a better level of assurance that they will hopefully remain in place and will continue to function appropriately. The area highlighted in blue is around 3%. This is decent slope for an overland area, but doesn’t meet the stated 5% on the checklist. Since there is a downspout in this location, it is advisable to direct the concentrated water away from the building. The typical downspout extension and concrete splash block (similar to that pictured above) will adequately do this. There isn’t much latitude with the adjacent curb line. Thanks, Nick Haws, PE, LEED AP NORTHERN ENGINEERING From: Dan Mogen [mailto:dmogen@fcgov.com] Sent: Friday, March 10, 2017 4:11 PM 2 To: Nick Haws <nick@northernengineering.com> Cc: Russell Baker <j.russell.baker@outlook.com>; 'Dan Griffith (dan@etccontracting.com)' <dan@etccontracting.com>; Andy Reese <andy@northernengineering.com> Subject: RE: Manhattan Townhomes | Certification of Lot Grading | Bldg. B Nick, I have a question on this one about the downspout extension and splash block. Downspout extensions and/or splash blocks should be used on nearly every downspout at every home; this is standard although homeowners often don’t use them. Not using them isn’t good practice; however, it doesn’t necessarily have serious effects. I’m questioning what the special situation is here that they have to discharge directly to the flowline. Is there a sump here or something that could be corrected? Or what is happening that can’t be corrected? 3 Dan Mogen, EI, CFM Development Review Engineer Water Utilities Engineering 4 City of Fort Collins (970)224‐6192 dmogen@fcgov.com From: Nick Haws [mailto:nick@northernengineering.com] Sent: Friday, March 10, 2017 6:15 AM To: Dan Mogen Cc: Russell Baker; 'Dan Griffith (dan@etccontracting.com)'; Andy Reese Subject: Manhattan Townhomes | Certification of Lot Grading | Bldg. B Dan, Attached is the Certification of Lot Grading for Building B (3812 Manhattan Ave.) at Manhattan Townhomes 2nd Filing. Please let me know if you have any questions or need additional information. Thanks, Nick Haws, PE, LEED AP Vice President NORTHERN ENGINEERING 301 N. Howes Street, Suite 100 | Fort Collins, Colorado 80521 O: 970.221.4158 ext. 5414 | D: 970.568.5414 | M: 970.690.0927 nick@northernengineering.com | www.northernengineering.com