According to Radio Locator 106.7 KZZA (Casa FM), which used to be KDL, is at 75,000 feet.
Houston's Party 93.3 is almost 100 KW, and almost 2000 ft.
http://www.radio-locator.com/cgi-bin/info?call=KPTY&service=FM
It's ratings have been slipping, are expected to continue to slip (if they stay Rhythmic) with the new Hot 95.7 in the market, and the name itself reminds me of Party 93.1 Miami. Unfortunately KPTY's signal doesnt properly cover the entire market...but it does a great job of reaching Beaumont

Beaumont's CHR/Pop station, Q-94 is super conservative, so they'd definitely make an impact there. The signal is still strong in huge chunks of H-Town. The coverage area seems to be identical to that of the now defunt 98.5 Kiss FM, which was CHR and CHR/Dance in the mid-late 90s. KPTY also used to be located at 100.7 (or was it 104.9?) and they were definitely Dance friendly back then.
Houston was at one time considered the Euro-Dance capital of America in the late 80s (according to Billboard magazine) and both 93 Q and Power 104 played a lot of Dance, especially New Wave by the likes of New Order, Pet Shop Boys, Erasure, Human League, etc. Houston's first Dance station was the short lived Energy 96, one of the first Energy stations in the country. It only lasted for about a year, but it was a fun station to listen to. When 104 KRBE started moving into its "hits without the hype" phase in 91, it went more adult, but was extremely Dance friendly. Within a year it started to lean more on Modern Rock crossover records, which 93 Q and Power 104 were both big supportes of in the 80s. It still played a good amount of Dance in rotation at this time, though went overly Modern Rock and then Modern AC leaning in 95-96, similar to Z-100 New York. When KRBE evolved back to CHR/Pop, again at the same exact time as New York's Z-100 (Z's PD Tom Poleman and MD Paul Cubby Bryant both came to Z-100 from KRBE) they were all over records like "One And One" by Robert Miles, Planet Soul's "Set You Free", and other records. In the late 90s-early 2000s KRBE stayed Dance friendly and was one of the few stations in America playing songs like "Prey" by Tina Cousins. The station was of course all over Euro and Trance hits like Alice Deejay's "Better Off Alone".