N.H. Code Admin. R. Env app D
482-A:3, XVII
XVII. State and municipal public works employees who have fulfilled the requirements of a certification program developed by the department may maintain, repair, replace, or modify culverts up to a maximum diameter of 48 inches, or the hydraulic equivalent, as long as the structure can pass flows from the contributing watershed without causing damage to upstream or downstream properties, and in accordance with best management practices to protect water quality, without prior notification to the department. Federal employees who otherwise meet the requirements of the program developed by the department may maintain, repair, replace, or modify culverts as specified in this paragraph on any land within the state that is owned or managed by the federal government.
XVIII. The department shall develop an installer's certification program, in accordance with paragraph XVII, and shall determine the educational requirements for certification, including continuing education requirements. Professional engineers who are duly licensed by the New Hampshire board of professional engineers are exempt from the program requirements of this section. All certified individuals who perform such work shall submit a quarterly report to the department fully identifying work that they performed during each quarter and documentation of continuing education requirements.
XIX. The department shall issue an installer's permit to any individual who submits an application provided by the department, and has satisfactorily completed the program in accordance with paragraphs XVII and XVIII. Permits shall be issued from January 1 and shall expire December 31 of every other year. Permits shall be renewable upon proper application, and documentation of compliance with the continuing education requirement of paragraph XVIII. The installer's permit may be suspended, revoked, or not renewed for just cause, including, but not limited to, the installation of culverts in violation of this chapter or the refusal by a permit holder to correct defective work. The department shall not suspend, revoke, or refuse to renew a permit except for just cause until the permit holder has had an opportunity to be heard by the department. An appeal from such decision to revoke, suspend, or not renew a permit may be taken pursuant to RSA 21-O:14.
N.H. Code Admin. R. Env app D