
211 S.W.3d 844 (2006)
Patrick STEWART, Sr. and Setria Whitfield, both Individually and as Heirs to the Estates of Patrick Stewart, Jr. and Brooke Stewart, Appellants,
v.
CITY OF CORSICANA, Texas, Appellee.
No. 10-06-00044-CV.
Court of Appeals of Texas, Waco.
December 6, 2006.
*845 Eric D. Pearson, Sayles Werbner PC, Kevin L. Kelley, Kelley & Witherspoon LLP, Dallas, for appellants.
William W. Krueger III, Fletcher & Springer LLP, Dallas, for appellee.
Before Chief Justice GRAY, Justice VANCE, and Justice REYNA.

OPINION
FELIPE REYNA, Justice.
Patrick Stewart, Sr. and Setria Whitfield, both individually and as heirs to the Estates of their children Patrick Stewart, Jr. and Brooke Stewart, appeal the trial court's granting of a plea to the jurisdiction filed by the City of Corsicana in their premises liability suit. They contend in six issues that the court erred by: (1) granting the City's plea to the jurisdiction; (2) failing to accept as true all evidence favorable to them; (3) making credibility determinations in deciding the plea to the jurisdiction; (4) ruling on the merits of their claims in deciding the plea to the jurisdiction; (5) applying a constructive knowledge standard to Stewart's knowledge of the dangerous condition at issue; and (6) granting the plea to the jurisdiction notwithstanding the existence of "a clear question of fact regarding the City's knowledge of the dangerous condition." We will reverse and remand.


*846 Background
Stewart had driven to Garland to get his children, two-year-old Patrick and one-year-old Brooke, from their mother Whitfield. On the way back, he stopped in Corsicana at his mother's house to call Whitfield and tell her they had made it safely to Corsicana and would be driving on to Kerens where he lived. It was after midnight when they arrived in Corsicana.[1]
Unbeknownst to Stewart, the National Weather Service had issued several severe weather notices including: (1) a flash flood watch at 1:59 p.m. for Navarro County and surrounding counties; (2) a severe thunderstorm watch for Navarro and surrounding counties at 7:51 p.m.; (3) a severe thunderstorm warning for Navarro County at 12:31 a.m. stating "National Weather Service Doppler radar detected a severe thunderstorm over Corsicana"; and (4) a flash flood warning for Navarro County at 1:04 a.m., noting "high water has been reported on Interstate 45 at mile marker 241" and "Doppler radar indicated very heavy rain."
It was raining hard when Stewart arrived at his mother's house, and she told him that the business route for Interstate 45 was closed due to flooding. He decided to take his usual route home, which would take him on Bunert Road. After Stewart drove onto the low-water crossing on Bunert Road at Post Oak Creek, he noticed water across the road. He stopped as he approached a tree laying across the road and blocking the path of his car. The car stalled, and he tried without success to restart it. Stewart initially picked Patrick and Brooke up, intending to carry them to the water's edge. However, Stewart feared that he could not safely carry them because the water was moving too swiftly, so he left them in the car and went for help.
When Stewart returned, his car had been swept away by the floodwaters. Patrick and Brooke were drowned.
Stewart and Whitfield allege in their petition that the low-water crossing is a special defect or alternatively a premise defect. The primary contentions in the City's plea to the jurisdiction are that (1) the low-water crossing is not a special defect as a matter of law and (2) the City is not liable under a premise defect theory because it did not have actual knowledge at the relevant time that the crossing posed an unreasonable risk of harm to those traveling across it.
At an evidentiary hearing, the court heard testimony from Stewart and several other witnesses. Stewart testified that he had lived in the area twenty-two years and had driven across that part of Bunert Road many times. He does not recall any time in the last twenty-two years when the creek has flooded over the crossing at Bunert Road.
The City's public works director Ronald Lynch testified that the City had previously closed the low-water crossing on Bunert Road several times for public safety because of flooding.
Diana Rawlins, who served on the Corsicana City Council from 2001 to 2003, testified that she knew as a member of the council that this crossing tended to flood during periods of heavy rain and that this situation was discussed with at least one other member of the council and with the city manager.
After the hearing, the court took the matter under advisement and received additional *847 briefing and evidence from the parties. The court signed an order granting the City's plea to the jurisdiction about six months after the hearing. Contemporaneously with this order, the court issued written findings of fact and conclusions of law. The court's second through fifth conclusions in particular are relevant here.
2. Given the circumstances established by the evidence, the Court finds that the conditions present at the Bunert Crossing did not constitute a special defect.
3. The Court does not find the testimony of the witness Rawlins persuasive or credible concerning her belief that circumstances constituting a special defect existed.
4. The Court further finds that any rational motorist familiar with the roadway, the conditions and propensity for flooding along the subject creek would not face an unexpected or unusual danger.
5. The Court also finds that while circumstances may exist which demonstrate a special defect due to roadway flooding, the evidence in this case fails to establish such circumstances.
At the City's request, the court made what we will characterize as amended findings of fact and conclusions of law about one month later.[2] Amended Finding of Fact No. 1 recites in pertinent part:
1. The following Findings of Fact are based upon standard credibility factors, including, but not limited to, the following: (1) the manner in which the witness testified; (2) the presence of inconsistent testimony; (3) whether the witness was impeached; and (4) whether the witness had any motivation to be dishonest. The Court finds all testimony which is inconsistent with the following Findings of Fact not to be credible. Specifically, the Court finds that Diana P. Rawlins is not a credible witness and consequently discredits her testimony to the extent that it is inconsistent with the below Findings of Fact.
Amended Findings of Fact Nos. 3 and 4 provide:
3. The Bunert Road Crossing was designed to allow water to pass over the roadway at flood stage. In past years, Corsicana closed this crossing when notified of high water and a potential hazard. Prior to this incident, there were no complaints, reports, claims or comments regarding flood-related accidents or injuries at the Bunert Road Crossing. On the dates in question, Corsicana was unaware of the flooding condition at the Bunert Road Crossing.
4. Plaintiff, Patrick D. Stewart, Sr. ("Plaintiff Stewart") regularly drove over the Bunert Road Crossing. He was aware that the Bunert Road Crossing was in a low area and subject to flooding. He was familiar with the area based upon his lifetime residence in Navarro County. On April 30, 2004, Plaintiff Stewart knew that the Bunert Road Crossing could flood under the existing weather conditions. Again, during this same time period, Corsicana *848 was unaware of any flood condition at the Bunert Road Crossing.
The court's amended Conclusions of Law Nos. 11 to 14, inclusive, are relevant to this appeal and provide:
11. The Court does not find the testimony of Diana P. Rawlins persuasive or credible concerning her belief that circumstances constituting a special or premises defect existed. Due to the weather conditions and Plaintiff Stewart's familiarity with the Bunert Road Crossing. [sic] Even if Ms. Rawlins had been credible, it is not relevant.
12. The Court further finds that any rational motorist familiar with the roadway, the conditions and propensity for flooding along the subject creek would not face an unexpected or unusual danger.
13. Given the circumstances established by the evidence, the Court finds that the conditions present at Bunert Road Crossing did not constitute a special or premises defect. While other circumstances may exist that demonstrate a special or premise defect due to roadway flooding, the evidence in this case fails to establish such other circumstances.
14. Plaintiff's premises defect, special defect and design defect claims are barred by the TTCA.

Premises Liability
Under the Texas Tort Claims Act, sovereign immunity is waived and a governmental unit is liable for personal injury or death "caused by a condition or use of tangible personal or real property if the governmental unit would, were it a private person, be liable to the claimant according to Texas law." TEX. CIV. PRAC. & REM.CODE ANN. § 101.021(2) (Vernon 2005). A governmental unit may be subject to premises liability for either ordinary premise defects or special defects. An ordinary premise defect is a condition of the premises which creates an unreasonable risk of harm. State Dep't of Highways & Pub. Transp. v. Payne, 838 S.W.2d 235, 237 (Tex.1992); Tex. Dep't of Transp. v. Fontenot, 151 S.W.3d 753, 760-61 (Tex.App.-Beaumont 2004, pet. denied); Corbin v. City of Keller, 1 S.W.3d 743, 748 (Tex.App.-Fort Worth 1999, pet. denied). Special defects are "excavations," "obstructions," or other conditions which "present an unexpected and unusual danger to ordinary users of roadways." State Dep't of Highways & Pub. Transp. v. Kitchen, 867 S.W.2d 784, 786 (Tex.1993) (per curiam) (quoting Payne, 838 S.W.2d at 238); see also TEX.CIV. PRAC. & REM.CODE ANN. § 101.022(b) (Vernon Supp.2006); Fontenot, 151 S.W.3d at 761; Corbin, 1 S.W.3d at 746.
For an ordinary premise defect, "the governmental unit owes to the claimant only the duty that a private person owes to a licensee on private property, unless the claimant pays for the use of the premises."[3] TEX. CIV. PRAC. & REM.CODE ANN. § 101.022(a) (Vernon Supp.2006); Payne, 838 S.W.2d at 237; Fontenot, 151 S.W.3d at 760; Corbin, 1 S.W.3d at 747. Conversely, if the condition at issue constitutes a special defect, then the governmental unit owes the claimant the same duty *849 that a private person owes an invitee. Payne, 838 S.W.2d at 237; Fontenot, 151 S.W.3d at 760-61; Corbin, 1 S.W.3d at 747.
Thus, for an ordinary premise defect, the governmental unit can be liable only if it has actual knowledge of the condition at issue and the plaintiff did not. Payne, 838 S.W.2d at 237; Fontenot, 151 S.W.3d at 761; Corbin, 1 S.W.3d at 748. For a special defect, the governmental unit can be liable if it knew or should have known of the condition. Payne, 838 S.W.2d at 237; Fontenot, 151 S.W.3d at 761. The plaintiff's awareness of the existence of a special defect is immaterial. See Payne, 838 S.W.2d at 237; Fontenot, 151 S.W.3d at 761; Thompson v. City of Corsicana Housing Auth., 57 S.W.3d 547, 553 (Tex.App.-Waco 2001, no pet.).
"Whether a condition is a premise defect or a special defect is a question of duty involving statutory interpretation and thus an issue of law for the court to decide." Payne, 838 S.W.2d at 238; Fontenot, 151 S.W.3d at 761; accord R.R. Street & Co. v. Pilgrim Enters., Inc., 166 S.W.3d 232, 240 (Tex.2005); Corbin, 1 S.W.3d at 747.

Evidentiary Standard
Stewart and Whitfield contend in their second and third issues respectively that the court erred by: (1) failing to accept as true all evidence favorable to them; and (2) making credibility determinations in deciding the plea to the jurisdiction.
In Texas Department of Parks and Wildlife v. Miranda, the Supreme Court most recently explained the appropriate evidentiary standard to be applied when a governmental unit files a plea to the jurisdiction. 133 S.W.3d 217 (Tex.2004). "[T]his standard generally mirrors that of a summary judgment." Id. at 228. Thus:
 the trial court must "construe the pleadings liberally in favor of the plaintiffs and look to the pleaders' intent";
 "in a case in which the jurisdictional challenge implicates the merits of the plaintiffs' cause of action and the plea to the jurisdiction includes evidence, the trial court reviews the relevant evidence to determine if a fact issue exists";
 the trial court must "take as true all evidence favorable to the [plaintiffs]" and "indulge every reasonable inference and resolve any doubts in the [plaintiffs'] favor";
 "If the evidence creates a fact question regarding the jurisdictional issue, then the trial court cannot grant the plea to the jurisdiction, and the fact issue will be resolved by the fact finder";
 "However, if the relevant evidence is undisputed or fails to raise a fact question on the jurisdictional issue, the trial court rules on the plea to the jurisdiction as a matter of law."
Id. at 226-28.
Because the applicable standards for a plea to the jurisdiction are essentially the same as those for a summary judgment motion with regard to how the trial court evaluates the evidence presented, other principles of summary judgment practice are appropriate to consider. For example, "[t]he weight to be given a witness's testimony is a matter for the trier of fact, and a summary judgment cannot be based on an attack of a witness's credibility." Thompson, 57 S.W.3d at 556 (quoting State v. Durham, 860 S.W.2d 63, 66 (Tex. 1993)). "If the credibility of the affiant or deponent is likely to be a dispositive factor in the resolution of the case, then summary judgment is inappropriate." Alaniz *850 v. Hoyt, 105 S.W.3d 330, 347 (Tex.App.-Corpus Christi 2003, no pet.) (quoting Casso v. Brand, 776 S.W.2d 551, 558 (Tex. 1989)) Wilcox v. Marriott, 103 S.W.3d 469, 475 (Tex.App.-San Antonio 2003, pet. denied) (same). Thus, witness credibility "does not matter when the setting is one of summary judgment for there the trial court cannot make credibility determinations." Tri-State Chemicals, Inc. v. W. Organics, Inc., 83 S.W.3d 189, 198 (Tex. App.-Amarillo 2002, pet. denied). These principles apply with equal force to a hearing on a plea to the jurisdiction.
Stewart and Whitfield contend in their second and third issues that the court erred by failing to accept as true all evidence favorable to them and by judging the credibility of the witnesses. We agree.
The trial court recited numerous "findings" in which the court plainly did not accept as true all evidence favorable to the plaintiffs or view the evidence in the light most favorable to them. For example, in Finding of Fact No. 4, the court found that "Stewart knew that the Bunert Road Crossing could flood under the existing circumstances." However, Stewart's testimony directly contradicts this finding in several respects.
Stewart testified that:
 he "did not know" that the "crossing is in a low flood plain"
 as far as he knows, that crossing has not flooded at anytime in the last 22 years;
 he knows that it has flooded in Corsicana on "Business 45 mainly";
 he did not know that Post Oak Creek is the body of water that causes this flooding on the business route of Interstate 45:
 he did not know that this is the same creek which flows under Bunert Road at the crossing in question; and
 he did not know that the Bunert Road Crossing is a low-water crossing designed for water to flow over during heavy rains.
Based on the quoted portion of Finding of Fact No. 4, the court apparently chose to disbelieve Stewart's testimony on the issue of actual knowledge. In addition, the court expressly stated that it did not find Rawlins's testimony "persuasive or credible" insofar as it was inconsistent with the court's findings and conclusions. Thus, the court failed to "take as true all evidence favorable to the [plaintiffs]" and "indulge every reasonable inference and resolve any doubts in the [plaintiffs'] favor." See Miranda, 133 S.W.3d at 228. By failing to do so, the court erred because it applied an erroneous evidentiary standard in evaluating the evidence before it. Id. at 226-28.
By evaluating the witnesses' credibility, the court likewise erred. See Durham, 860 S.W.2d at 66; Casso, 776 S.W.2d at 558; Alaniz, 105 S.W.3d at 347; Wilcox, 103 S.W.3d at 475; Tri-State Chemicals, 83 S.W.3d at 198; Thompson, 57 S.W.3d at 556; see also Miranda, 133 S.W.3d at 226-28.
The court's errors as identified in the discussion regarding Stewart's and Whitfield's second and third issues will not require reversal unless the errors probably caused the rendition of an improper judgment. See TEX.R.APP. P. 44.1(a)(1). Because we will conclude that the evidence raises a fact question on the issue of whether the City or Stewart had actual knowledge at the relevant time, these errors did cause the rendition of an improper judgment. Accordingly, we sustain Stewart's and Whitfield's second, third, and fourth issues.


*851 The City's Knowledge[4]
Stewart and Whitfield contend in their sixth issue that the court erred by granting the City's plea to the jurisdiction because a fact question remains regarding whether the City had actual knowledge of the dangerous condition.[5]
Actual knowledge may be established by circumstantial evidence. See City of San Antonio v. Rodriguez, 931 S.W.2d 535, 537 (Tex.1996) (per curiam); Palais Royal, Inc. v. Gunnels, 976 S.W.2d 837, 844 (Tex.App.-Houston [1st Dist.] 1998, pet. dism'd by agr.); Simons v. City of Austin, 921 S.W.2d 524, 528 n. 2 (Tex. App.-Austin 1996, writ denied); see also Lee Lewis Constr., Inc. v. Harrison, 70 S.W.3d 778, 785 (Tex.2001) ("actual awareness" element of gross negligence claim may be proved by circumstantial evidence); LaRue v. Chief Oil & Gas, L.L.C., 167 S.W.3d 866, 879 (Tex.App.-Fort Worth 2005, no pet.) (same).
Here, public works director Lynch testified that the City did not have notice that the Bunert Road crossing was flooded until Stewart called 9-1-1. However, Lynch also testified that the crossing had "sometimes" flooded in the past during heavy rains, that this crossing was designed so that the water would flow over it during heavy rains, and that the City had closed the low-water crossing several times before because of flooding.
The National Weather Service had issued at least four pertinent notices on the afternoon and night preceding the accident. Rawlins, who was a former member of the City Council, testified that the City knew prior to the accident that the crossing "tended to flood during heavy rains." The court also admitted in evidence Rawlins's affidavit, in which she stated that Corsicana "public officials were on notice prior to May 1, 2004 of the dangerous conditions the Bunert Road low-water crossing over Post Oak Creek posed during light and heavy rains."
In post-hearing briefing, Stewart and Whitfield also provided the court with a copy of a 2001 Flood Protection Planning Study prepared for the City of Corsicana. Among other things, this study states, "The City of Corsicana has a history of flood problems and damages within the Post Oak Creek drainage basin." The study highlights the Bunert Road crossing as one of the problem areas.
TxDOT had closed a portion of the business route for Interstate 45, which is upstream from the Bunert Road crossing, because of flooding on the night of the accident. At least one of the police officers who responded to Stewart's call had just assisted another officer in apprehending *852 a murder suspect. Thus, it could be inferred that these officers were patrolling the streets of Corsicana that night and knew of the heavy rainfall.
When we "indulge every reasonable inference and resolve any doubts in [Stewart's and Whitfield's] favor," we must conclude that a fact question remains regarding whether the City had actual knowledge of the dangerous condition. See Rodriguez, 931 S.W.2d at 537 (rejecting no-evidence complaint because "[d]epending on the position of the leaks above the floor and the amount of rain, the jury might have inferred that the person in charge knew that there would be water on the floor"); Palais Royal, 976 S.W.2d at 844 ("Palais Royal actually knew that the ladder was shortened and that visibility at the top of the ladder was obscured by the `drop' ceiling which Palais Royal insisted on lowering. These facts, albeit circumstantial, constitute some evidence that Palais Royal knew the ladder was dangerous."); Simons, 921 S.W.2d at 528 & n. 2 (testimony of two experts who testified that partition was dangerous and city "must have known" of the danger constitutes circumstantial evidence of city's actual knowledge).
Accordingly, we sustain Stewart's and Whitfield's sixth issue.

Stewart's Knowledge
Stewart and Whitfield contend in their fifth issue that the trial court erroneously applied a constructive knowledge standard in assessing Stewart's knowledge of the dangerous condition.
The court found that Stewart "regularly drove over the Bunert Road Crossing"; that "[h]e was aware that the Bunert Road Crossing was in a low area and subject to flooding"; and that he "knew that the Bunert Road Crossing could flood under the existing weather conditions." (emphasis added) However, these findings directly contradict Stewart's testimony.
The court's finding does appear to resemble a finding of constructive rather than actual knowledge. Cf. CMH Homes, Inc. v. Daenen, 15 S.W.3d 97, 102 (Tex. 2000) (premises owner may be liable to invitee for dangerous condition if owner "should have known that a condition on its premises created an unreasonable risk of harm") (emphasis added). More importantly however, and as addressed in connection with several of Stewart's and Whitfield's other issues, the court applied the wrong evidentiary standard to Stewart's testimony.
When we "indulge every reasonable inference and resolve any doubts in [Stewart's and Whitfield's] favor," we must conclude that a fact question remains regarding whether Stewart had actual knowledge of the dangerous condition. See Palais Royal, 976 S.W.2d at 844. Thus, we sustain Stewart's and Whitfield's fifth issue.

Plea to the Jurisdiction
Stewart and Whitfield contend in their first issue that the court erred by granting the City's plea to the jurisdiction because fact questions remain on the issues of the City's and Stewart's knowledge. They contend in their fourth issue that the court erroneously ruled on the merits of their claims in deciding the plea to the jurisdiction.
As previously observed, when a plea to the jurisdiction "implicates the merits of the plaintiffs' cause of action and the plea to the jurisdiction includes evidence, the trial court reviews the relevant evidence to determine if a fact issue exists." Miranda, 133 S.W.3d at 227. The court may adjudicate the merits of the claim at this stage only "if the relevant *853 evidence is undisputed or fails to raise a fact question on the jurisdictional issue." Id. at 228.
Because fact questions remain on the issues of the City's and Stewart's knowledge, the court erred by deciding the merits of their claims and granting the plea to the jurisdiction. See Miranda, 133 S.W.3d at 227-28. Accordingly, we sustain Stewart's and Whitfield's first and fourth issues.
We reverse the order granting the City's plea to the jurisdiction and remand this cause to the trial court for further proceedings consistent with this opinion.
(Chief Justice GRAY dissenting with note).[*]
NOTES
[1]  Based on the time of Stewart's call to 9-1-1, the accident which serves as the basis for the suit occurred around 1:30 a.m.
[2]  The court issued findings of fact and conclusions of law contemporaneously with its order granting the City's plea to the jurisdiction, on February 3, 2006. Stewart and Whitfield filed their notice of appeal on February 15. The City filed a Request for Findings of Fact and Conclusions of Law on February 23. The court signed the City's proposed Findings of Fact and Conclusions of Law on March 8.
[3]  Because of a 2005 amendment, a governmental unit owes a person using a toll road the duty owed a licensee, even though the person paid for the use of the road. See TEX. CIV. PRAC. & REM.CODE ANN. § 101.022(c) (Vernon Supp.2006). For other persons who pay for the use of government-owned premises, a governmental unit owes the duty owed an invitee. Thompson v. City of Corsicana Housing Auth., 57 S.W.3d 547, 552 (Tex.App.-Waco 2001, no pet.).
[4]  Stewart and Whitfield do not challenge the court's conclusion that the condition was not a special defect. The court's conclusion in this regard is supported by numerous authorities. See, e.g., State Dep't of Highways & Pub. Transp. v. Kitchen, 867 S.W.2d 784, 786 (Tex. 1993) (per curiam); Tex. Dep't of Transp. v. Fontenot, 151 S.W.3d 753, 761-62 (Tex.App.-Beaumont 2004, pet. denied); Corbin v. City of Keller, 1 S.W.3d 743, 747-48 (Tex.App.-Fort Worth 1999, pet. denied); but cf. Tex. Dep't of Transp. v. Abilez, 962 S.W.2d 246, 251 (Tex.App.-Waco 1998, pet. denied) (TxDOT conceded that flooded highway constituted special defect).
[5]  The dangerous condition at issue is the flooded road, not the low-water crossing itself. See Tex. Dep't of Transp. v. Ramirez, 74 S.W.3d 864, 867 (Tex.2002) (per curiam) (quoting State v. Rodriguez, 985 S.W.2d 83, 85 (Tex.1999) (per curiam)) ("the `[d]esign of any public work, such as a roadway, is a discretionary function involving many policy decisions, and the governmental entity responsible may not be sued for such decisions'"); see also TEX. CIV. PRAC. & REM.CODE ANN. § 101.056(2) (Vernon 2005).
[*]  (Dissenting note: "Chief Justice Gray notes that there are many statements in the majority opinion with which he does not agree, statements that ultimately lead the majority to an erroneous judgment. He therefore dissents from both the opinion and the judgment. But a separate opinion will not be issued.")
