# IDAPA 37.03.06.035: Section 035. Design Reports, Drawings, And Specifications

> Idaho · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_035

## Section

- **Citation:** IDAPA 37.03.06.035
- **Heading:** Section 035. Design Reports, Drawings, And Specifications
- **Jurisdiction:** Idaho
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Idaho Administrative Code / IDAPA 37 (Water Resources, Department of) / Chapter 37.03.06 / Section 035

## Text

The following provisions shall apply when submitting plans, drawings, reports, and specifications for dams to th e Director for design review and approval, prior to commencing construction. (3-30-23) 01. Submission of Duplicate Plans, Drawings and Specifications. Any owner desiring to construct , enlarge, alter, or repair any dam, shall submit duplicate plans, drawings and specifications prepared by an enginee r for the proposed work to the Director with required fees for approval prior to commencing construction. (3-30-23) 02. Applying for and Obtaining Written Approval. Construction of a new dam, or the enlargement , alteration, or repair of such shall not commence until the owner has applied for and obtained written approval of th e plans, drawings, and specifications from the Director. (3-30-23) 03. Preparation and Submission of Plans. Plans and drawings shall be of a sufficient scale with a n adequate number of views showing proper dimensions, so that the plans and drawings may be readily interpreted an d so that the structure and appurtenances can be built in conformance with the approved design. Plans and drawing s shall be submitted in both printed and digital format, with the printed version consisting of paper size eleven b y seventeen (11 x 17) inches. After reviewing the plans, the Director will notify the owner of any required changes. (3-30-23) 04. Information Included with Plans. Plans for new dams or the enlargement, alteration, or repair o f such shall include as much of the following information as determined necessary by the Director to adequately describe the enlargement, alteration, or repair and the effect on the existing structure or its appurtenances: (3-30-23) a. A topographic map of the project site showing the location of the proposed construction by section , township and range, and location of all borings, test pits, borrow pits and other locations of samples obtained for fiel d or laboratory testing; (3-30-23) b
tor to adequately describe the enlargement, alteration, or repair and the effect on the existing structure or its appurtenances: (3-30-23) a. A topographic map of the project site showing the location of the proposed construction by section , township and range, and location of all borings, test pits, borrow pits and other locations of samples obtained for fiel d or laboratory testing; (3-30-23) b. A profile depicting the locations, elevations, and depths of borings or test pits, including the visua l illustration of logs of bore holes, test pits, or borrow pits; (3-30-23) c. A cross-section of the structure at maximum section showing elevation and width of crest, slopes of upstream and downstream faces, thickness of riprap, zoning of earth embankment, location of cutoff and bondin g trenches, elevations and dimensional heights, size and type of conduits, valves, operating mechanism, and dimensions of all other essential elements deemed to be necessary for properly constructing the approved design; (3-30-23) d. Detailed drawings showing plans, cross and longitudinal sections of appurtenant features such a s but not limited to the spillway, training walls, outlet conduits, valves, gates, trash rack, and control works; (3-30-23) e. A curve or table showing the capacity of the reservoir or tailings impoundment in acre-feet vs . gauge height referenced to a common project datum and the computations used in making such determinations; (3-30-23) f. A curve or table showing the outlet discharge capacity in cubic feet per second vs. gauge height of reservoir storage level, and the computations used in making such determinations; (3-30-23) g. A curve or table showing the spillway discharge capacity in cubic feet per second vs. gauge heigh t of the reservoir or flood surcharge level above the spillway crest and the computations used in making suc h determinations; (3-30-23) h
tlet discharge capacity in cubic feet per second vs. gauge height of reservoir storage level, and the computations used in making such determinations; (3-30-23) g. A curve or table showing the spillway discharge capacity in cubic feet per second vs. gauge heigh t of the reservoir or flood surcharge level above the spillway crest and the computations used in making suc h determinations; (3-30-23) h. Detailed drawings of spillway structure(s), including cross-sections of the channel entrance an d exit points to and from the spillway and a spillway profile; (3-30-23) i. Plans for flow measuring devices capable of providing an accurate determination of the flow of the stream above or below the reservoir, and a permanent reservoir or staff gauge near the outlet of the reservoir plainly marked in feet and tenths of a foot referenced to an approved datum; and (3-30-23) j. Plans or drawings of instruments recommended by the owner or engineer to monitor th e performance of the dam to assure safe operation, or as may be required by the Director as deemed necessary t o monitor any structure for benefit of public safety regardless of size. (3-30-23) 05. Specifications. The engineer shall prepare specifications that include instructions for constructio n of the approved design in accordance with accepted engineering and industry standards of care, including provision s for adequate observation, inspection, and control of the work by an engineer during the period of construction. (3-30-23) 06. Changes to the Approved Design. The approved design shall not be materially changed withou t prior written consent of the Director. Design changes which may affect the stability, size, or integrity of the structure , while construction is underway, shall be submitted for the Director’s review and approval. In emergency situations , the owner shall make the required alterations or repairs necessary to relieve the emergency, and subsequently notif y the Director of all alterations or repairs implemented. (3-30-23) 07. Inspections
esign changes which may affect the stability, size, or integrity of the structure , while construction is underway, shall be submitted for the Director’s review and approval. In emergency situations , the owner shall make the required alterations or repairs necessary to relieve the emergency, and subsequently notif y the Director of all alterations or repairs implemented. (3-30-23) 07. Inspections. The owner shall allow inspections by the Department to assure the dam an d appurtenant structures are constructed in conformance with the approved plans and specifications, or as may b e revised by the engineer and approved by the Director if there are unforeseen conditions discovered during sit e preparation or construction which potentially jeopardize the future integrity and safety of the project works. Th e Department may request of the owner that certain stages of construction not proceed without inspection and approva l by the Director. (3-30-23) 08. Inspection, Examination and Testing of Materials. All materials and workmanship shall be subject to review, inspection, examination, or testing by the Director. (3-30-23) 09. Rejection of Defective Material. The Director may order the owner or engineer to reject defectiv e material. The owner shall correct rejected workmanship and replace rejected material with approved material. (3-30-23) 10. Suspension of Work. The Director may order the engineer to suspend any work that is or is likely to be subject to damage by inclement weather conditions. (3-30-23) 11. Responsibility of Engineer. These provisions shall not relieve the engineer of their responsibl e charge to assure that construction is accomplished in accordance with their approved plans and specifications a s mandated by Sections 54-1202(10) and (15), Idaho Code, or to unilaterally suspend work as deemed necessary. (3-30-23) 12. Design Report. Owners proposing to construct, enlarge, alter, or repair a dam shall submit a n engineering or design evaluation report to accompany the plans and specifications
sure that construction is accomplished in accordance with their approved plans and specifications a s mandated by Sections 54-1202(10) and (15), Idaho Code, or to unilaterally suspend work as deemed necessary. (3-30-23) 12. Design Report. Owners proposing to construct, enlarge, alter, or repair a dam shall submit a n engineering or design evaluation report to accompany the plans and specifications. The engineering report shal l include as much of the following information as necessary to present the technical basis for the design and to describ e the analyses used to evaluate performance of the structure and appurtenances. (3-30-23) a. All technical reference(s), equations, calculations, and assumptions used in the design. (3-30-23) b. Hydrologic data used in determining runoff from the drainage areas, reservoir flood routin g pertinent to the project location, and hydraulic evaluations of the outlet(s) and the spillway(s) as may be required fo r approval of the design plans and specifications. (3-30-23) c. Investigation of site and subsurface conditions, to include the engineering properties of th e foundation area and of each type of material to be encountered or used in the construction of the project works. (3-30-23) d. A stability analysis, including an evaluation of overturning, sliding, slope, and foundation stability; (3-30-23) i. An evaluation of seismic design loads may be included in the stability analysis for all dams a s deemed necessary by the Director for benefit of public safety. The evaluation required for the design of large dams o r high hazard structures shall use the maximum ground acceleration which could affect the dam. In the absence of a site-specific seismic hazard analysis, the Director may accept seismic analyses that reference published seismi c hazard maps which determine seismic loads estimated for seismic events corresponding to a return interval of two percent (2)% in fifty (50) years. (3-30-23) ii
arge dams o r high hazard structures shall use the maximum ground acceleration which could affect the dam. In the absence of a site-specific seismic hazard analysis, the Director may accept seismic analyses that reference published seismi c hazard maps which determine seismic loads estimated for seismic events corresponding to a return interval of two percent (2)% in fifty (50) years. (3-30-23) ii. Seismic analyses may be waived by the Director for new or existing dams if the consequence of failure is demonstrated to be sufficiently low or the critical features of design are demonstrated to be sufficientl y conservative to allow minor deformation(s) without releasing the contents of the impounding structure. (3-30-23) e. Geologic description of the dam and reservoir area, including evaluation of landslide potential nea r the dam; (3-30-23) f. Engineering properties and the weathering characteristics of the contents proposed for storage in the impoundment, if applicable; (3-30-23) g. Other information which would aid in evaluating the safety of the design. (3-30-23) 13. Additional Information/Waiver. The Director may require the filing of such additiona l information which in their opinion is necessary for the benefit of public safety or waive any requirement in these rules if available data demonstrates that it is unnecessary. (3-30-23) 14. Alternate Plans. The Director may accept plans and specifications for dams, or portions thereof prepared for other agencies which are determined to meet the requirements of Rule 35, including but not limited t o the following: (3-30-23) a. An operation plan; or (3-30-23) b. An emergency action plan to help protect or mitigate the consequences of a dam failure o n downstream life and property. (3-30-23) 036. – 044. (RESERVED)

## Nearby sections

- [IDAPA 37.03.06.000 Section 000. Legal Authority](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_000.md)
- [IDAPA 37.03.06.001 Section 001. Scope](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_001.md)
- [IDAPA 37.03.06.002 Section 002. Administrative Appeals](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_002.md)
- [IDAPA 37.03.06.010 Section 010. Definitions](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_010.md)
- [IDAPA 37.03.06.015 Section 015. Authority Of Representative](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_015.md)
- [IDAPA 37.03.06.020 Section 020. Dam Size Classification](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_020.md)
- [IDAPA 37.03.06.025 Section 025. Hazard Classification](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_025.md)
- [IDAPA 37.03.06.030 Section 030. Forms](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_030.md)
- [IDAPA 37.03.06.035 Section 035. Design Reports, Drawings, And Specifications](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_035.md)
- [IDAPA 37.03.06.045 Section 045. Emergency Action And Operation Plans](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_045.md)
- [IDAPA 37.03.06.050 Section 050. New Dams And Reservoirs](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_050.md)
- [IDAPA 37.03.06.060 Section 060. Existing Dams And Reservoirs](https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_060.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_ID_IDAPA_37_03_06_035. Check the current official text before relying on it. Not legal advice.