Chapter 1501:21-11 Investigations

1501:21-11-01 Investigations, general requirements.

The applicant shall be required to complete all investigations prior to submission of the final design report. The investigations shall include the items described in rules 1501:21-11-02 to 1501:21-11-05 of the Administrative Code. The scope and degree of precision that will be required for a specific project will be a matter of judgment based on the complexities of the site and the classification of the proposed structure.

Five Year Review (FYR) Dates: 3/7/2018 and 03/06/2023
Promulgated Under: 119.03
Statutory Authority: 1521.06
Rule Amplifies: 1521.06 , 1521.061
Prior Effective Dates: 04/15/1972, 10/15/1981, 01/16/2005

1501:21-11-02 Foundation investigation.

(A) A foundation investigation shall be conducted to determine the suitability of the site for the development of a dam or levee and any impoundment.

(1) The foundation materials beneath any dam, levee, or appurtenance must be able to bear the weight of the structure and any impounded materials without instability or detrimental settlement.

(2) The foundation materials beneath the dam, levee, appurtenance or any impoundment area must be able to limit any detrimental seepage that could impact neighboring properties or destabilize the dam or levee.

(B) The foundation investigation shall be performed so as to define the soil and rock stratigraphy and the groundwater conditions to the satisfaction of the chief.

(C) The foundation investigation shall consist of borings, test pits, and other subsurface explorations as deemed necessary.

(D) Laboratory testing of the undisturbed and remolded soil specimens, and rock samples shall be required by the chief, unless the applicant can demonstrate to the satisfaction of the chief that these analyses are not necessary.

Effective: 5/24/2018
Five Year Review (FYR) Dates: 3/7/2018 and 05/24/2023
Promulgated Under: 119.03
Statutory Authority: 1521.06
Rule Amplifies: 1521.06 , 1521.061
Prior Effective Dates: 04/15/1972, 10/15/1981, 12/09/1999, 01/16/2005

1501:21-11-03 Construction materials.

All materials, such as borrow soil, aggregate, riprap stone, and filter material, are proposed for use in the dam or levee, the applicant shall determine the locations and extents of these materials, and their structural properties and gradations when incorporated into the proposed dam or levee. The applicant shall show the locations of these materials on the plans.

A construction materials investigation shall be conducted to determine the suitability of the material to construct a dam or levee.

(A) The construction materials used to construct the dam or levee must be able to remain stable for all loading conditions and have limited detrimental settlement.

(B) The construction materials must be able to limit any detrimental seepage that could impact neighboring properties or destabilize the dam or levee.

Effective: 5/24/2018
Five Year Review (FYR) Dates: 3/7/2018 and 05/24/2023
Promulgated Under: 119.03
Statutory Authority: 1521.06
Rule Amplifies: 1521.06 , 1521.061
Prior Effective Dates: 04/15/1972, 10/15/1981, 12/09/1999, 01/16/2005

1501:21-11-04 Surveys [Rescinded].

Rescinded eff 1-16-05

1501:21-11-05 Hydrologic and hydraulic investigations.

(A) Hydraulic and hydrologic analyses shall be accomplished using methodologies and computer analyses developed by the division of water resources, the United States army corps of engineers, the United States geological survey, the natural resources conservation service, the United States bureau of reclamation, the national weather service, or others which employ sound engineering basis and are specifically approved by the chief. Both present and projected future land uses shall be considered in determining the runoff characteristics of the drainage areas. The more severe of these two conditions shall be used in the design.

(B) For dams, the hydrologic and hydraulic assumptions and design calculations used in spillway designs shall be included in the design submittal. These shall include, but not be limited to:

(1) Rainfall and runoff data;

(2) Reservoir inflow hydrographs;

(3) Reservoir area-storage volume elevation data to the top of dam elevation;

(4) Spillway elevation-discharge data;

(5) Reservoir flood routings and backwater analyses, except as provided in rule 1501:21-13-03 of the Administrative Code; and

(6) A dam failure analysis as may be required by the chief for downstream hazard evaluation.

(C) For levees, the hydrologic and hydraulic assumptions and design calculations used shall be included in the design submittal. These shall include, but not be limited to:

(1) Discharge/probability data;

(2) Hydrographs;

(3) Valley cross-sections;

(4) Descriptive hydraulic information concerning bridges and other structures that influence the hydraulic characteristics of the watercourse;

(5) Stream elevation-discharge-storage data; and

(6) Stream flood routings and flood profiles.

Effective: 5/24/2018
Five Year Review (FYR) Dates: 3/7/2018 and 05/24/2023
Promulgated Under: 119.03
Statutory Authority: 1521.06
Rule Amplifies: 1521.06 , 1521.061
Prior Effective Dates: 04/15/1972, 10/15/1981, 12/09/1999, 01/16/2005, 05/23/2010