The neighbouring city of Seibal on the Pasión River appears to have intervened at Punta de Chimino at this time and to have politically dominated the smaller site.
[2] The peninsula possessed deep fertile soils overlying limestone bedrock and gave easy access to the rich aquatic resources of the lake.
[9] The inhabitants maintained areas of intensive agriculture protected by the defensive moats and the site became the last centre of elite activity to survive in the Petexbatún, at a time when other cities in the region had been reduced to tiny hamlets among the Classic period ruins.
[11] The stylistic similarities between the two sites indicate that Seibal may well have taken advantage of the political fragmentation of the Petexbatún region in order to take control of Punta de Chimino and exact tribute payment.
[12] Punta de Chimino was probably the last of the Petexbatun capitals to fall when the region fragmented after the defeat of Dos Pilas by its former vassal Tamarindito.
[16] Punta de Chimino was badly looted in the second half of the 20th century, extensive damage was caused, including the removal of all exposed sculpture at the site.
[18] The creation of the moats involved the excavation of 38,250 cubic metres (1,351,000 cu ft) of the limestone bedrock, which was then used to build up the ramparts.
[21] The box gardens were probably fertilised with organic material dredged from the swampy area immediately south of the peninsula, with the addition of night soils from the inhabitants.
[22] The combination of moats and walls that protected the peninsula made Punta de Chimino the best defended site in the entire Maya lowlands.
[22] The Terminal Classic palaces at the site consisted of wide platforms measuring approximately 10 by 20 metres (33 by 66 ft) and thickly coated in plaster.
Rescue excavations discovered a variety of small greenstone artifacts in the spoil including an earspool, two beads and a necklace with a roughly carved face.
[21] A Late Classic ceramic incense burner was excavated from the summit of the structure, it was modelled to form the Maya sun deity G3.
[25] Five low status burials were discovered, four of them interred directly under the floor and one in a crude cist, none of them were accompanied by offerings and all are dated to the Late Classic.
The structure was a mid-status residential building dating to the Late Classic and included a kitchen measuring 4 by 1.8 metres (13.1 by 5.9 ft) where more than 600 ceramic fragments were excavated together with animal bones.
It is the largest yet found in the Petexbatún region and is similar in both size and style to the Terminal Classic ballcourt C-9 at the city of Seibal, on the bank of the Pasión River.
[29] The ballcourt has open end zones and is unusually large for such a small site, perhaps owing its construction to the political intervention of Seibal.
The burial was accompanied by only two offerings consisting of a ceramic bowl and a plate, the style of which date it to the Late Classic sometime between AD 600 and 830.