FISH VERSUS CULVERTS - SOME CONSIDERATIONS FOR RESOURCE MANAGERS

RECOMMENDATIONS ARE GIVEN FOR DESIGN AND FOR RECONSTRUCTION OF CULVERTS TO ELIMINATE OR REDUCE THEIR DETRIMENTAL EFFECT ON FISH PASSAGE. TRANSITION BETWEEN STREAM AND CULVERT MUST BE PROVIDED. A CULVERT OUTFALL BARRIER CAN BE CORRECTED BY DOWNSTREAM WEIRS, CRIBS, OR LOWHEAD DAMS. CHANNEL GRADIENT MAY BE DECREASED WITH FILL MATERIAL. THE ENTRANCE APPROACH AND SWIN-THROUGH AREA MAY BE PROVIDED WITH A FISHWAY STRUCTURE SUCH AS DENIL, STEEP-PASS, VERTICAL SLOT, OR WEIR. A SUFFICIENT WATER DEPTH AND VELOCITY IN THE OUTFALL MUST BE PROVIDED TO ALLOW FISH MOVEMENT. LIGHT REDUCTION IN CULVERTS MAY DETER FISH FROM SWIMMING THROUGH THEM. A STABLE STREAMBED MUST BE MAINTAINED THROUGH THE CULVERT-INFLUENCED AREA. SINCE FISH SWIMMING ABILITY IS AFFECTED BY WATER VELOCITY, WATER TEMPERATURE, AND DISSOLVED OXYGEN IN THE STREAM, THE CULVERT SHOULD NOT DISTURB CONDITIONS.

  • Supplemental Notes:
    • Eng Tech RePT ETR-7700-5, 19 PP, 11 FIG, 2 TAB, 12 REF
  • Corporate Authors:

    US Forest Service

    1400 Independence Avemue, SW
    Washington, DC  United States  20250
  • Authors:
    • Metsker, H E
  • Publication Date: 1970-7

Subject/Index Terms

Filing Info

  • Accession Number: 00204846
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 29 1971 12:00AM