City Of Owatonna Foundation Elevation Certification (Page 2 of 2) in pdf

Lot drainage and building height.

Buildable Lots Existing Prior to April 1, 2008

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Surface drainage of the lot based on final grade shall be indicated on the site plan as per the required Stormwater Management Plan

(Ord. 317.03).

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Foundation elevation shall be between 18” and 32” above sidewalk grade as measured at the front most corner of the garage closest

to the side property line. If measurement is taken off the footing the contractor shall also include the distance in feet and inches from

the top of the footing to the top of foundation. In instances where garage is detached or planned for later construction the measure-

ment shall be taken at the highest point of the foundation at the front of the house. Sidewalk grade shall be obtained from City Engi-

neering. The City shall provide on-site sidewalk grade stakes. Deviation from this standard is permissible only upon approval of the

City Engineering Department.

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Certification of the foundation elevation by a licensed land surveyor or engineer shall be submitted prior to the foundation wall in-

spection. City approved standardized form will be provided.

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The control elevation, also known as “sidewalk grade”, is the base elevation used to measure the height of the foundation and is

determined by one of the following methods: A) if no curb and gutter or sidewalk exists, the City shall provide on-site sidewalk

grade stakes at front property corners. The control elevation is the average of the difference in elevation of the front property corners

at the center of the lot. B) If curb and gutter is in but no sidewalk exists in front of lot, the control elevation shall be the elevation of

the curb at the center point between front property corners plus 3 ½ inches. C) If curb and gutter and sidewalk exist, the control

elevation shall be the elevation of the sidewalk at the center point between front property corners.

Building Lots Created After April 1, 2008

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Site, erosion control and grading plans submitted with building plans shall be in compliance with the Stormwater Management Plan

approved for the applicable subdivision plat. Information submitted shall include elevations of lowest floor, top of foundation at

center line of lot, structure type, final grading contours, and elevation of lot corners as per the Stormwater Management Plan. All

elevations will be as per the approved Stormwater Management Plan. (Note: Sidewalk grade stakes will not be provided by the city.)

Any deviation from the plan must first be approved by City Engineering Department. Depending on specific circumstances and/or

the degree of variance such deviation may require review and certification by a licensed professional engineer. Such expenses shall

be the responsibility of the contractor.

•

Certification of the foundation elevation by a licensed land surveyor or engineer shall be submitted prior to the foundation wall in-

spection.

•

To insure that final grading of the lot is in compliance with the grading plan as approved as part of the Stormwater Management

Plan, lot corner elevations shall be certified by a licensed land surveyor or engineer. This certification must be submitted to the city

prior to the issuance of the Certificate of Occupancy. If a deviation from the plan is indicated, the City Engineering Department shall

review the situation and determine what remedy needs to be pursued. Costs associated with any such remedy shall be the responsi-

bility of the contractor. Depending on specific circumstances and/or the degree of variance from the plan, contractor may have to

secure the services of a licensed professional engineer to determine a remedy. The expense of doing so shall be the responsibility of

the contractor.

*Proposed Foundation Elevation-If builder chooses, the foundation elevation can be verified by a

licensed surveyor prior to the foundation wall being completed. Licensed surveyor must use the fol-

lowing method to determine the proposed foundation height: Proposed foundation elevation to be the

elevation of front most corner of the actual garage footing, closest to the side property line, plus the

height of the garage foundation wall, measured in feet and inches from the top of footing to the top of

the foundation. City inspectors will then verify that the wall height complies as noted.

**Actual Foundation Elevation-After footings and foundation have been installed and prior to foun-

dation inspection, a licensed surveyor must verify the foundation elevation at front most corner of the

garage foundation, closest to the side property line.

***Control Elevation-The control elevation, also known as “sidewalk grade”, is the base elevation

used to measure the height of the foundation and is determined by one of the following methods: A) if

no curb and gutter or sidewalk exists, the City shall provide on-site sidewalk grade stakes at front prop-

erty corners. The control elevation is the average of the difference in elevation of the front property

corners at the center of the lot. B) If curb and gutter is in but no sidewalk exists in front of lot, the con-

trol elevation shall be the elevation of the curb at the center point between front property corners plus 3

½ inches. C) If curb and gutter and sidewalk exist, the control elevation shall be the elevation of the

sidewalk at the center point between front property corners.

Control Elevation should always be denoted at 100’-0”, actual above sea level elevation not necessary.

City Of Owatonna Foundation Elevation Certification Page 2

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