KARST GROUNDWATER CONSULTANTS Welcome to the homepage for Crawford Hydrology Laboratory Web Site. Crawford Hydrology Laboratory, formerly Crawford and Associates, Inc. was founded by Dr. Nicholas Crawford in order to provide professional consulting and laboratory support services for organizations performing environmental and/or engineering work in karst (carbonate bedrock) terrains. OUR SERVICES INCLUDE: Karst Hydrogeologic Investigations Dyes and Groundwater Tracing Supplies Groundwater Tracer Investigations Laboratory Services: Fluorimetric Analysis On-Site Assistance and Training Wellhead/Springhead Protection  Fluorescent Dye Tracing Sinkhole Collapse Investigations Tracer Test Design and Analysis For more information please contact us at Crawford Hydrology Laboratory Hoffman Environmental Research Institute 1906 College Heights Blvd. #319 Bowling Green, KY 42101 (270) 745-9224