WHILE EN ROUTE, THE PLT CONTACTED A FSS & WAS ADVISED THAT THE REDDING ARPT WAS BELOW MINIMUMS DUE TO FOG. HE THEN CONTACTED THE BENTON UNICOM (7 MI NW OF REDDING MUNI) & REPORTED THAT HE COULD NOT SEE THE RWY LIGHTS AT THE BENTON ARPT, BUT THAT HE WOULD ATTEMPT TO LOCATE ENTERPRISE ARPT WHICH WAS 5 MI EAST OF BENTON. ALSO, HE STATED THAT HE WAS LOW ON FUEL, & SINCE HE COULD SEE THE LIGHTS ON EUREKA WAY (CALIFORNIA STATE HIGHWAY 299W), HE WOULD USE IT IF NECESSARY. A SHORT TIME LATER, THE ACFT COLLIDED WITH 2 OVERHEAD GROUND LINES WHICH WERE ASSOCIATED WITH THE SHASTA TRACY 230 KV TRANSMISSION LINE. THE CABLES WERE 1/2 INCH IN DIAMETER & LOCATED NEAR EUREKA WAY, 120 FT AGL, & APRX 1-1/2 MI FROM THE BENTON ARPT. AFTER HITTING THE CABLES THE ACFT IMPACTED ON EUREKA WAY. AN EXAM OF THE WRECKAGE REVEALED NO EVIDENCE OF A PREIMPACT/MECHANICAL PROBLEM.