Section 333.05. Submission of plans, specifications and analyses.

 

(1)   Plans and specifications. Plans and specifications prepared by a professional engineer registered in the state of Wisconsin shall be submitted to and approved by the department prior to the construction of a new dam or reconstruction of an existing dam.

(2)   Hydraulic, hydrologic and stability analyses. Hydraulic, hydrologic and stability analyses prepared by a professional engineer registered in the state of Wisconsin shall be submitted to and approved by the department prior to the construction of a new dam or the reconstruction of an existing dam. These analyses shall be conducted according to accepted engineering practice and unless the department determines otherwise shall be submitted in the form of a report which includes, at a minimum:

(a) Purpose of the report . Development of an emergency action plan, floodplain zoning or development of the hazard rating for the dam.

(b) Roles and participation of other agencies -- DNR, DEG, community officials, other agencies.

(c) Data collection methods and sources of information -- Development of cross sectional data, description of past flooding events, reference to previous studies, current floodplain zoning map.

(d) Methodologies and procedures -- Operation of dam during high water, breach parameters, description of all spillway components, scenario for failure, failure conditions.

(e) Regional flood flows calculated in conformance with the standards in s. NR 116.07 (3) .

(f) Hydraulic modeling -- Determination and delineation of the following hydraulic conditions during the regional flood, using the standards in s. NR 116.07 (4) :

1. Hydraulic shadow -- assuming that the dam is in existence and fails. Failure shall be considered to occur at the maximum upstream water elevation or at the point of overtopping, based upon the physical conditions at the dam.

2. Dam in place, no failure -- assuming the dam operates in accordance with its department approved operation plan, if one is available, or not operated if there is no plan.

3. Dam nonexistent -- assuming the dam has been removed and the natural stream cross-section is restored.

(g) Comparison table -- Summary by cross section of the maximum flood elevation for the 3 hydraulic conditions.

(h) Determination of the dam hazard rating using the criteria in s. NR 333.06 .

(i) Design flood flows, based on the hazard rating and the hydraulic design standards in s. NR 333.07 .

(j) Calculations for routing of the design flood through the structure. Starting conditions for the routing shall be at the normal pool and normal flow tailwater elevations.

(k) Stability analysis of the dam, which considers sliding, overturning and foundation failure during base flow conditions and at maximum load conditions, including ice loading, during routing of the design flood through the dam.

(L) Appendices:

1. Plan view of the dam.

2. Elevation view of the dam from downstream including breach geometry.

3. Pertinent elevations of the dam.

4. Stage vs. storage curve or area vs. volume curve, or both.

5. Spillway capacity rating curves or calculations, where appropriate.

6. Downstream water surface profiles and floodway data tables, for the dam failure, and the with and without dam conditions, during the regional flood.

7. Maps for the 3 modeled conditions, with cross section locations and structure identification adequate to determine the hazard rating for the dam, for the dam failure condition map, showing the floodway, and to an appropriate scale consistent with the community floodplain zoning map.

8. Cross section plots of actual field cross sections and comparison with dam break input cross sectional data.

9. Hard copy and data disk with computer input and output for all modeled conditions, including hydrology and hydraulic runs.

10. Other supporting calculations as the department deems necessary.

(3)   Estimated costs. The estimated cost of construction of the new dam or reconstruction of the existing dam, and the estimated cost of removing the dam and restoring the channel to its natural condition, shall be submitted to the department prior to the construction of a new dam or reconstruction of an existing dam.

History: Cr. Register, May, 1985, No. 353 , eff. 6-1-85; CR 00-136 : am. (1) and (3), r. and recr. (2), Register July 2001, No. 547 eff. 8-1-01.

Note

For suggested dam breach parameters, see the National Weather Service "DAMBRK or FLDWAV" Users Manuals. Microsoft Windows NT 6.1.7601 Service Pack 1 Mapping, profiles and floodway data tables must be suitable for zoning purposes, as required in s. NR 116.07 (4) . Microsoft Windows NT 6.1.7601 Service Pack 1